Triple co-generation system of solar-assisted air source heat pump

Abstract

The utility model provides a triple co-generation system of a solar auxiliary air source heat pump. The triple co-generation system comprises a compressor, a hot water heat exchanger, an outdoor heat exchanger, an indoor heat exchanger, a solar heat collector and a hot water tank, the refrigerant pipeline comprises a first pipeline assembly communicating between the first liquid side of the indoor heat exchanger and the second liquid side of the outdoor heat exchanger, a second pipeline assembly communicating between the air inlet side of the hot water heat exchanger and the compressor, and a third pipeline assembly communicating between the liquid outlet side of the hot water heat exchanger and the first pipeline assembly. The air source heat pump (hot water) triple co-generation unit solves the technical problems that when an existing air source heat pump (hot water) triple co-generation unit is in the working condition of heating and water heating, refrigerant exhaust enters a hot water heat exchanger and an indoor heat exchanger at the same time, the heat exchanger load is large, the saturation temperature of refrigerant media is low, and the heat supply capacity of a triple co-generation system is insufficient. And the heat supply efficiency of the triple co-generation system is reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of heating, and more specifically, to a solar-assisted air source heat pump tri-generation system. Background Technology

[0002] As people's demand for heating, cooling, and hot water supply continues to rise, air source heat pump systems and hot water systems, which operate independently, are complex in structure, have numerous components, and are cumbersome to operate and control, thus failing to gain widespread popularity. Air source heat pump (hot water) tri-generation units, on the other hand, are a comprehensive energy system integrating cooling, heating, and hot water supply functions, and are highly favored by users.

[0003] However, there is at least one of the following problems in the relevant technology: When the current air source heat pump (hot water) tri-generation unit is used for both heating and hot water production, the heat exchangers are under heavy load because the refrigerant exhaust enters both the hot water heat exchanger and the indoor heat exchanger at the same time. As a result, the saturation temperature of the refrigerant is low, which leads to insufficient heating capacity in the tri-generation system and reduces the heating efficiency of the tri-generation system. Utility Model Content

[0004] The technical problem solved by this utility model is that in current air source heat pump (hot water) tri-generation units, when operating in both heating and hot water production mode, the refrigerant exhaust simultaneously enters the hot water heat exchanger and the indoor heat exchanger, resulting in a high load on the heat exchangers and a low saturation temperature of the refrigerant, leading to insufficient heating capacity in the tri-generation system and thus reducing the heating efficiency of the tri-generation system.

[0005] To address the aforementioned problems, this utility model provides a solar-assisted air source heat pump tri-generation system. The tri-generation system includes: a compressor, a hot water heat exchanger, an outdoor heat exchanger, and an indoor heat exchanger connected by refrigerant piping through which a refrigerant medium flows; a solar collector used to heat tap water to obtain domestic hot water; a hot water tank connected to the solar collector via a first water pipe assembly, and connected to the hot water heat exchanger via a second water pipe assembly; wherein the refrigerant piping includes: a first piping assembly connected between the first liquid side of the indoor heat exchanger and the second liquid side of the outdoor heat exchanger; a second piping assembly connected between the air inlet side of the hot water heat exchanger and the compressor; and a third piping assembly connected between the liquid outlet side of the hot water heat exchanger and the first piping assembly.

[0006] Compared with existing technologies, the technical effects achieved by adopting this technical solution are as follows: By setting up solar collectors, the combined heat and power (CHP) system of this solution provides an additional heat source for the CHP system, thereby avoiding insufficient heating capacity when the CHP system is in heating and hot water production mode, and thus improving the heating efficiency of the CHP system.

[0007] Furthermore, by using solar collectors to produce domestic hot water with the assistance of solar energy, electricity consumption is reduced, thus meeting the needs of energy conservation and environmental protection.

[0008] In one embodiment of this utility model, the first water pipe assembly includes: a first water inlet pipe, which is connected between the first water inlet of the hot water tank and the first water outlet of the hot water heat exchanger; and a first water outlet pipe, which is connected between the first water outlet of the hot water tank and the first water inlet of the hot water heat exchanger.

[0009] Compared with existing technologies, the technical effects achieved by this solution are as follows: By setting a first inlet pipe and a first outlet pipe between the hot water tank and the hot water heat exchanger, this solution ensures unobstructed water flow between the hot water tank and the hot water heat exchanger, forming an efficient water circulation system. The first inlet pipe is directly connected to the hot water heat exchanger and the hot water tank, and the first outlet pipe is also directly connected to the hot water tank and the hot water heat exchanger, reducing heat loss of hot water during transmission, thereby reducing energy waste and achieving the goal of energy saving.

[0010] In one embodiment of this utility model, the second water pipe assembly includes: a second water inlet pipe, which is connected between the second water inlet of the hot water tank and the second water outlet of the solar collector; and a second water outlet pipe, which is connected between the second water outlet of the hot water tank and the second water inlet of the solar collector.

[0011] Compared with existing technologies, the technical effects achieved by this solution are as follows: By installing a second inlet pipe and a second outlet pipe between the hot water tank and the solar collector, this solution ensures unobstructed water flow between the hot water tank and the solar collector, forming an efficient water circulation system. The second inlet pipe directly connects the solar collector and the hot water tank, and the second outlet pipe also directly connects the hot water tank and the solar collector, reducing heat loss during the transmission of hot water between the hot water tank and the solar collector, thereby further reducing energy waste and achieving the goal of energy conservation.

[0012] In one embodiment of this utility model, the refrigerant pipeline further includes: a first connecting pipe disposed on the first gas side of the outdoor heat exchanger; a second connecting pipe disposed on the second gas side of the indoor heat exchanger; and a third connecting pipe disposed at the first input end of the compressor; wherein the third connecting pipe is connected to the first connecting pipe and the second connecting pipe respectively.

[0013] Compared with existing technologies, the technical effects achieved by this solution are as follows: By setting the first connecting pipe and the second connecting pipe to be located on the first gas side and the second gas side of the outdoor heat exchanger and the indoor heat exchanger respectively, and by connecting the first connecting pipe and the second connecting pipe to the third connecting pipe located at the first input end of the compressor, the efficient transmission of the refrigerant in the tri-generation system is ensured, the energy loss of the refrigerant during the transmission process is reduced, and the heat exchange efficiency of the tri-generation system is improved.

[0014] In one embodiment of this utility model, the tri-generation system includes: a four-way reversing valve, which is disposed at the connection between the third connecting pipe and the first and second connecting pipes; a three-way reversing valve, which is disposed between the gas inlet side of the hot water heat exchanger and the compressor; wherein, the refrigerant pipeline also includes a fourth connecting pipe for connecting the three-way reversing valve and the four-way reversing valve.

[0015] Compared with existing technologies, the technical advantages of this solution are as follows: This solution achieves rapid switching between cooling and heating modes in a tri-generation system through a four-way reversing valve located at the connection points of the first, second, and third connecting pipes, simplifying the operation of the tri-generation system. Specifically, in cooling mode, the refrigerant is guided to flow first to the outdoor heat exchanger for cooling before flowing to the indoor heat exchanger to cool the room; in heating mode, the flow direction is reversed, allowing the refrigerant to flow first to the indoor heat exchanger to heat the room before flowing to the outdoor heat exchanger, thus simplifying the operation of the tri-generation system.

[0016] Furthermore, by combining three-way and four-way reversing valves, the tri-generation system can simultaneously provide cooling, heating, and hot water functions within an integrated system, thus fulfilling the needs for independent cooling, independent heating, independent hot water production, cooling combined with hot water production, and heating combined with hot water production.

[0017] In one embodiment of this utility model, the tri-generation system further includes a first expansion valve, and the first pipeline assembly includes: a first branch pipe, which is disposed on the first liquid side of the outdoor heat exchanger; and a second branch pipe, which is disposed on the second liquid side of the indoor heat exchanger and is connected to the first branch pipe; wherein, the first expansion valve is disposed at the connection between the first branch pipe and the second branch pipe.

[0018] Compared with existing technologies, the technical effects achieved by adopting this technical solution are as follows: By setting a first expansion valve, this solution enables the tri-generation system to accurately control the flow rate of the refrigerant flowing through the outdoor heat exchanger and the indoor heat exchanger, thereby limiting the flow rate of the refrigerant on the high-pressure side of the compressor, thus preventing the compressor from being damaged due to overload, and extending the service life of the compressor.

[0019] In one embodiment of this utility model, the combined cooling, heating, and power supply system further includes a second expansion valve disposed on the liquid outlet side, and a third pipeline assembly including: a third branch pipe disposed between the second expansion valve and the second branch pipe; and a fourth branch pipe disposed between the first branch pipe and the third branch pipe; wherein, the combined cooling, heating, and power supply system further includes a first solenoid valve disposed on the third branch pipe and a second solenoid valve disposed on the fourth branch pipe.

[0020] Compared with existing technologies, the technical effects achieved by this solution are as follows: By setting a second expansion valve, this solution enables the tri-generation system to precisely control the flow rate of the refrigerant from the hot water heat exchanger, thereby limiting the flow rate of the refrigerant on the high-pressure side of the compressor. This further prevents the compressor from being damaged due to overload, and thus extends the service life of the compressor.

[0021] In one embodiment of this utility model, the tri-generation system further includes a gas-liquid separator, which is disposed between the four-way reversing valve and the compressor.

[0022] Compared with existing technologies, the technical effects achieved by this solution are as follows: By setting up a gas-liquid separator, this solution can effectively separate the liquid portion of the refrigerant entering the compressor, preventing liquid slugging, thereby reducing internal wear of the compressor and extending its service life.

[0023] In one embodiment of this utility model, the tri-generation system further includes: an oil return separator, which is disposed between the three-way reversing valve and the output end to separate the refrigerant from the lubricating oil; an oil return capillary tube, which is disposed at the output end; and an oil return filter, which is disposed between the oil return capillary tube and the oil return separator; wherein, the refrigerant pipeline further includes a fifth connecting pipe disposed at the second input end of the compressor, the oil return separator is provided with a first outlet, and the fifth connecting pipe is used to connect the second input end and the first outlet.

[0024] Compared with existing technologies, the technical effects achieved by this solution are as follows: By incorporating an oil return separator, lubricating oil in the refrigerant is effectively separated, ensuring that the lubricating oil returns to the compressor through the fifth connecting pipe, thus reducing internal wear on the compressor. Furthermore, the oil return capillary tube, with its small inner diameter, controls the oil flow returning to the compressor, maintaining oil pressure balance within the compressor and preventing damage caused by excessively high or low oil pressure. Even further, the oil return filter removes impurities from the lubricating oil, preventing them from entering the compressor and protecting its internal components. Therefore, this solution, through the combined use of an oil return separator, oil return capillary tube, and oil return filter, reduces internal wear on the compressor and extends its service life.

[0025] In one embodiment of this utility model, the oil return separator is further provided with a first inlet and a second outlet, and the second pipeline assembly includes: a fifth branch pipe, which is disposed between the three-way reversing valve and the hot water heat exchanger; a sixth branch pipe, which is disposed between the three-way reversing valve and the second outlet; and a seventh branch pipe, which is disposed between the oil return filter and the first inlet.

[0026] Compared with existing technologies, the technical effects achieved by this solution are as follows: By setting a fifth branch pipe to connect the three-way reversing valve and the hot water heat exchanger, this solution ensures that the refrigerant can flow smoothly to the hot water heat exchanger in hot water production mode, cooling / hot water production mode, and heating / hot water production mode, thereby improving the heat exchange efficiency of the tri-generation system. Furthermore, the mixture of refrigerant and lubricating oil, after impurities have been removed by the return oil filter, flows to the return oil separator through the seventh branch pipe. After the return oil separator separates the refrigerant and lubricating oil, the lubricating oil returns to the compressor through the fifth connecting pipe, and the refrigerant flows to the three-way reversing valve through the sixth branch pipe, ensuring effective lubrication inside the compressor.

[0027] By adopting the technical solution of this utility model, the following technical effects can be achieved:

[0028] This utility model provides a solar-assisted air source heat pump tri-generation system. By setting up a solar collector, it provides an additional heat source for the tri-generation system, thereby avoiding insufficient heating capacity when the tri-generation system is in heating and hot water production mode, and thus improving the heating efficiency of the tri-generation system. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 A schematic diagram of a solar-assisted air source heat pump tri-generation system provided for an embodiment of this utility model;

[0031] Figure 2 A schematic diagram of the piping connection when a solar-assisted air source heat pump tri-generation system is executed in a separate cooling mode or a separate heating mode, provided for an embodiment of this utility model.

[0032] Figure 3 A schematic diagram of the piping connection of a solar-assisted air source heat pump tri-generation system in the standalone hot water production mode, provided for an embodiment of this utility model;

[0033] Figure 4 A schematic diagram of the pipeline connection when a solar-assisted air source heat pump tri-generation system uses a solar collector to produce domestic hot water, provided as an embodiment of this utility model.

[0034] Figure 5 A schematic diagram of the piping connection of a solar-assisted air source heat pump tri-generation system in the cooling and hot water production mode provided for an embodiment of this utility model;

[0035] Figure 6 This is a schematic diagram of the pipeline connection when a solar-assisted air source heat pump tri-generation system is operating in heating and hot water production mode, as provided in an embodiment of this utility model.

[0036] Explanation of reference numerals in the attached figures:

[0037] 100. Compressor; 110. Third connecting pipe; 120. First input end; 121. Gas-liquid separator; 130. Four-way reversing valve; 140. Three-way reversing valve; 150. Fourth connecting pipe; 160. Second input end; 161. Fifth connecting pipe; 170. Output end; 171. Oil return separator; 171a. First outlet; 171b. First inlet; 171c. Second outlet; 172. Oil return filter Thin tube; 173, oil return filter; 200, hot water heat exchanger; 210, air inlet side; 220, liquid outlet side; 221, second expansion valve; 230, first water outlet; 240, first water inlet; 300, outdoor heat exchanger; 310, second liquid side; 320, first connecting pipe; 330, first air side; 400, indoor heat exchanger; 410, first liquid side; 412, first expansion valve; 420, second connecting pipe Pipe; 430, Second gas side; 500, Solar collector; 510, Second water outlet; 520, Second water inlet; 600, Hot water tank; 610, First water pipe assembly; 611, First water inlet pipe; 611a, First water pump; 612, First water outlet pipe; 620, Second water pipe assembly; 621, Second water inlet pipe; 621a, Second water pump; 622, Second water outlet pipe; 630, First water inlet; 64 0. First outlet; 650. Second inlet; 660. Second outlet; 700. First pipeline assembly; 710. First branch pipe; 720. Second branch pipe; 800. Second pipeline assembly; 810. Fifth branch pipe; 820. Sixth branch pipe; 830. Seventh branch pipe; 900. Third pipeline assembly; 910. Third branch pipe; 911. First solenoid valve; 920. Fourth branch pipe; 921. Second solenoid valve. Detailed Implementation

[0038] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0039] like Figure 1 As shown, this utility model provides a solar-assisted air source heat pump tri-generation system, which includes a compressor 100, a hot water heat exchanger 200, an outdoor heat exchanger 300, an indoor heat exchanger 400, a solar collector 500, and a hot water tank 600, all connected by a refrigerant pipeline through which the refrigerant flows. Specifically, the solar collector 500 is used to heat tap water to obtain domestic hot water. The hot water tank 600 is connected to the solar collector 500 through the first water pipe assembly 610, and the hot water tank 600 is connected to the hot water heat exchanger 200 through the second water pipe assembly 620. The refrigerant pipeline includes a first pipeline assembly 700, a second pipeline assembly 800, and a third pipeline assembly 900. The first pipeline assembly 700 is connected between the first liquid side 410 of the indoor heat exchanger 400 and the second liquid side 310 of the outdoor heat exchanger 300. The second pipeline assembly 800 is connected between the air inlet side 210 of the hot water heat exchanger 200 and the compressor 100. The third pipeline assembly 900 is connected between the liquid outlet side 220 of the hot water heat exchanger 200 and the first pipeline assembly 700.

[0040] Specifically, the combined heat and power (CHP) system in this solution provides an additional heat source for the CHP system by installing solar collectors 500, thereby avoiding insufficient heating capacity when the CHP system is in heating and hot water production mode, and thus improving the heating efficiency of the CHP system.

[0041] Furthermore, by using solar energy to assist in the production of domestic hot water through the solar collector 500, the consumption of electricity is reduced, thus meeting the requirements of energy conservation and environmental protection.

[0042] Furthermore, the first water pipe assembly 610 includes a first inlet pipe 611 and a first outlet pipe 612. The first inlet pipe 611 is connected between the first inlet 630 of the hot water tank 600 and the first outlet 230 of the hot water heat exchanger 200, and the first inlet pipe 611 is equipped with a first water pump 611a. The first outlet pipe 612 is connected between the first outlet 640 of the hot water tank 600 and the first inlet 240 of the hot water heat exchanger 200.

[0043] Specifically, this solution ensures unobstructed water flow between the hot water tank 600 and the hot water heat exchanger 200 by setting a first inlet pipe 611 and a first outlet pipe 612 between the hot water tank 600 and the hot water heat exchanger 200, forming an efficient water circulation system. The first inlet pipe 611 is directly connected to the hot water heat exchanger 200 and the hot water tank 600, and the first outlet pipe 612 is also directly connected to the hot water tank 600 and the hot water heat exchanger 200, reducing heat loss of hot water during transmission, thereby reducing energy waste and achieving the energy-saving requirement.

[0044] Furthermore, the second water pipe assembly 620 includes a second inlet pipe 621 and a second outlet pipe 622. Specifically, the second inlet pipe 621 is connected between the second inlet 650 of the hot water tank 600 and the second outlet 510 of the solar collector 500, and the second inlet pipe 621 is equipped with a second water pump 621a. The second outlet pipe 622 is connected between the second outlet 660 of the hot water tank 600 and the second inlet 520 of the solar collector 500.

[0045] Specifically, this solution ensures unobstructed water flow between the hot water tank 600 and the solar collector 500 by installing a second inlet pipe 621 and a second outlet pipe 622 between the hot water tank 600 and the solar collector 500, forming an efficient water circulation system. The second inlet pipe 621 directly connects the solar collector 500 and the hot water tank 600, and the second outlet pipe 622 also directly connects the hot water tank 600 and the solar collector 500, reducing heat loss during the transmission of hot water between the hot water tank 600 and the solar collector 500, thereby further reducing energy waste and achieving the goal of energy conservation.

[0046] Furthermore, the refrigerant piping also includes a first connecting pipe 320, a second connecting pipe 420, and a third connecting pipe 110. Specifically, the first connecting pipe 320 is located on the first gas side 330 of the outdoor heat exchanger 300, the second connecting pipe 420 is located on the second gas side 430 of the indoor heat exchanger 400, and the third connecting pipe 110 is located on the first input terminal 120 of the compressor 100; wherein, the third connecting pipe 110 is connected to both the first connecting pipe 320 and the second connecting pipe 420.

[0047] Specifically, this solution sets the first connecting pipe 320 and the second connecting pipe 420 to be located on the first gas side 330 and the second gas side 430 of the outdoor heat exchanger 300 and the indoor heat exchanger 400, respectively. The first connecting pipe 320 and the second connecting pipe 420 are respectively connected to the third connecting pipe 110 located on the first input end 120 of the compressor 100. This ensures the efficient transmission of the refrigerant in the tri-generation system, reduces the energy loss of the refrigerant during the transmission process, and improves the heat exchange efficiency of the tri-generation system.

[0048] Furthermore, the tri-generation system includes a four-way reversing valve 130 and a three-way reversing valve 140. Specifically, the four-way reversing valve 130 is located at the connection between the third connecting pipe 110 and the first connecting pipe 320 and the second connecting pipe 420, and the three-way reversing valve 140 is located between the gas inlet side 210 of the hot water heat exchanger 200 and the compressor 100; wherein, the refrigerant pipeline also includes a fourth connecting pipe 150 for connecting the three-way reversing valve 140 and the four-way reversing valve 130.

[0049] Specifically, this solution utilizes a four-way reversing valve 130 located at the connection points of the first connecting pipe 320, the second connecting pipe 420, and the third connecting pipe 110 to achieve rapid switching between cooling and heating modes in the tri-generation system, simplifying its operation. Specifically, in cooling mode, the refrigerant first flows to the outdoor heat exchanger 300 for cooling before flowing to the indoor heat exchanger 400 to cool the room; in heating mode, the flow direction is reversed, with the refrigerant first flowing to the indoor heat exchanger 400 to heat the room before flowing to the outdoor heat exchanger 300, thus simplifying the operation of the tri-generation system.

[0050] Furthermore, by setting a four-way reversing valve 130, the design of the refrigerant piping is simplified, thereby reducing the material and installation costs of the tri-generation system. In addition, the simplified design of the refrigerant piping reduces the resistance to the flow of refrigerant in the refrigerant piping and reduces the energy consumption of pumping refrigerant in the refrigerant piping, thereby improving the overall energy efficiency of the tri-generation system.

[0051] Furthermore, the three-way reversing valve 140 and the four-way reversing valve 130 are used in combination, enabling the tri-generation system to provide cooling, heating and hot water functions in one integrated system. This allows the tri-generation system to meet the needs of independent cooling, independent heating, independent hot water production, cooling and hot water production, and heating and hot water production.

[0052] In addition, the installation of the four-way reversing valve 130 and the three-way reversing valve 140 reduces the complexity and potential failure points of the tri-generation system, and lowers the long-term maintenance costs of the tri-generation system.

[0053] Furthermore, the tri-generation system also includes a first expansion valve 412, and the first piping assembly 700 includes a first branch pipe 710 and a second branch pipe 720. Specifically, the first branch pipe 710 is located on the first liquid side 410 of the outdoor heat exchanger 300, and the second branch pipe 720 is located on the second liquid side 310 of the indoor heat exchanger 400, and the second branch pipe 720 is connected to the first branch pipe 710; wherein, the first expansion valve 412 is located at the connection between the first branch pipe 710 and the second branch pipe 720.

[0054] Specifically, this solution enables the tri-generation system to precisely control the flow rate of the refrigerant passing through the outdoor heat exchanger 300 and the indoor heat exchanger 400 by setting the first expansion valve 412, thereby limiting the flow rate of the refrigerant on the high-pressure side of the compressor 100, preventing the compressor 100 from being damaged due to overload, and thus extending the service life of the compressor 100.

[0055] Furthermore, the tri-generation system also includes a second expansion valve 221 disposed on the liquid outlet side 220, and the third pipeline assembly 900 includes a third branch pipe 910 and a fourth main pipe. Specifically, the third branch pipe 910 is disposed between the second expansion valve 221 and the second branch pipe 720, and the fourth branch pipe 920 is disposed between the first branch pipe 710 and the third branch pipe 910; wherein, the tri-generation system also includes a first solenoid valve 911 disposed on the third branch pipe 910 and a second solenoid valve 921 disposed on the fourth branch pipe 920.

[0056] Specifically, this solution, by setting a second expansion valve 221, enables the tri-generation system to precisely control the flow rate of the refrigerant flowing out of the hot water heat exchanger 200, thereby limiting the flow rate of the refrigerant on the high-pressure side of the compressor 100, further preventing the compressor 100 from being damaged due to overload, and thus extending the service life of the compressor 100.

[0057] Furthermore, a first solenoid valve 911 is installed in the third branch pipe 910 and a second solenoid valve 921 is installed in the fourth branch pipe 920, which avoids the phenomenon that the first expansion valve 412 and the second expansion valve 221 perform secondary throttling on the cold medium when producing hot water.

[0058] Furthermore, the tri-generation system also includes a gas-liquid separator 121, which is located between the four-way reversing valve 130 and the compressor 100.

[0059] Specifically, this solution, by setting up a gas-liquid separator 121, can effectively separate the liquid portion from the refrigerant entering the compressor 100, preventing liquid slugging, thereby reducing wear inside the compressor 100 and extending the service life of the compressor 100.

[0060] Furthermore, the tri-generation system also includes an oil return separator 171, an oil return capillary tube 172, and an oil return filter 173. Specifically, the oil return separator 171 is located between the three-way reversing valve 140 and the output end 170 to separate the refrigerant from the lubricating oil. The oil return capillary tube 172 is located at the output end 170, and the oil return filter 173 is located between the oil return capillary tube 172 and the oil return separator 171. The refrigerant pipeline also includes a fifth connecting pipe 161 located at the second input end 160 of the compressor 100. The oil return separator 171 has a first outlet 171a, and the fifth connecting pipe 161 connects the second input end 160 and the first outlet 171a.

[0061] Specifically, by setting up an oil return separator 171, lubricating oil in the refrigerant is effectively separated, ensuring that the lubricating oil can return to the compressor 100 through the fifth connecting pipe 161, reducing internal wear of the compressor 100. Furthermore, the oil return capillary tube 172, with its small inner diameter, controls the oil flow returning to the compressor 100 to maintain oil pressure balance inside the compressor 100, preventing damage to the compressor 100 caused by excessively high or low oil pressure. Even further, by setting up an oil return filter 173, impurities in the lubricating oil are removed, preventing impurities from entering the compressor 100 and protecting the internal parts of the compressor 100. Therefore, this solution, through the combined use of the oil return separator 171, oil return capillary tube 172, and oil return filter 173, reduces internal wear of the compressor 100 and extends the service life of the compressor 100.

[0062] Furthermore, the oil return separator 171 is also provided with a first inlet 171b and a second outlet 171c, and the second pipeline assembly 800 includes a fifth branch pipe 810, a sixth branch pipe 820, and a seventh branch pipe 830. Specifically, the fifth branch pipe 810 is located between the three-way reversing valve 140 and the hot water heat exchanger 200, the sixth branch pipe 820 is located between the three-way reversing valve 140 and the second outlet 171c, and the seventh branch pipe 830 is located between the oil return filter 173 and the first inlet 171b.

[0063] Specifically, this solution connects the three-way reversing valve 140 to the hot water heat exchanger 200 via a fifth branch pipe 810, ensuring that the refrigerant flows smoothly to the hot water heat exchanger 200 in hot water production mode, cooling / hot water production mode, and heating / hot water production mode, thus improving the heat exchange efficiency of the tri-generation system. Furthermore, the mixture of refrigerant and lubricating oil, after impurities are removed by the return oil filter 173, flows to the return oil separator 171 via the seventh branch pipe 830. After the return oil separator 171 separates the refrigerant and lubricating oil, the lubricating oil returns to the compressor 100 via the fifth connecting pipe 161, while the refrigerant flows to the three-way reversing valve 140 via the sixth branch pipe 820, ensuring proper lubrication within the compressor 100.

[0064] The following combination Figures 2 to 6 This paper briefly introduces the specific operating process of a solar-assisted air source heat pump tri-generation system provided by this utility model when realizing its various functions.

[0065] Specifically, the solar-assisted air source heat pump tri-generation system provided by this utility model can realize five working modes: independent cooling, independent heating, independent hot water production, cooling and hot water production, and heating and hot water production. The details are as follows:

[0066] 1. The specific operating procedure for achieving standalone cooling mode is as follows:

[0067] Refrigerant side: Compressor 100 → Oil return capillary tube 172 → Oil return filter 173 → Oil separator → Three-way reversing valve 140 → Four-way reversing valve 130 → Outdoor heat exchanger 300 → First expansion valve 412 → Indoor heat exchanger 400 → Four-way reversing valve 132 → Gas-liquid separator 121 → Compressor 100 (Second solenoid valve 921 closed, first solenoid valve 911 closed);

[0068] Specifically, such as Figure 2 As shown, when the tri-generation system achieves independent cooling mode, the compressor 100 compresses the low-temperature, low-pressure refrigerant gas into a high-temperature, high-pressure refrigerant gas. The lubricating oil and refrigerant are separated by the oil return separator 171. The lubricating oil is filtered and separated by the oil return filter 173, and the oil is evenly distributed through the oil return capillary tube 172 before finally returning to the compressor 100. At this time, the three-way reversing valve 140B port is fully open and the C port is fully closed. The high-temperature and high-pressure refrigerant gas discharged from the oil return separator 171 flows from the three-way reversing valve 140A port to the B port, and then flows through the four-way reversing valve 130 and the outdoor heat exchanger 300. It condenses and releases heat to the outdoor air, transforming into a medium-temperature and medium-pressure refrigerant liquid. The medium-temperature and medium-pressure refrigerant liquid is throttled by the first expansion valve 412 into a low-temperature and low-pressure refrigerant liquid. The low-temperature and low-pressure refrigerant liquid then passes through the indoor heat exchanger 400, evaporates and absorbs heat to the indoor air, transforming into a low-temperature and low-pressure refrigerant gas. The low-temperature and low-pressure refrigerant gas is separated by the four-way reversing valve 130 and the gas-liquid separator 121 and returns to the compressor 100. The refrigerant liquid that has not been completely evaporated is stored in the gas-liquid separator 121, and the lubricating oil that accumulates at the bottom of the gas-liquid separator 121 also returns to the compressor 100.

[0069] 2. The specific operating procedure for achieving standalone heating mode is as follows:

[0070] Refrigerant side: Refrigerant side operation flow: Compressor 100 → Oil return capillary tube 172 → Oil return filter 173 → Oil separator → Three-way reversing valve 140 → Four-way reversing valve 130 → Indoor heat exchanger 400 → First expansion valve 412 → Outdoor heat exchanger 300 → Four-way reversing valve 130 → Gas-liquid separator 121 → Compressor 100 (Second solenoid valve 921 closed, first solenoid valve 911 closed).

[0071] Specifically, such as Figure 2As shown, when the tri-generation system achieves independent heating mode, the compressor 100 compresses the low-temperature, low-pressure refrigerant gas into a high-temperature, high-pressure refrigerant gas. The lubricating oil and refrigerant are separated by the oil return separator 171. The lubricating oil is filtered and separated by the oil return filter 173, and the oil is evenly distributed through the oil return capillary tube 172 before finally returning to the compressor 100. At this time, port B of the three-way reversing valve 140 is fully open and port C is fully closed. The high-temperature and high-pressure refrigerant gas discharged from the oil return separator 171 flows from port A to port B through the three-way reversing valve 140, and then flows through the four-way reversing valve 130 and the indoor heat exchanger 400, condensing and releasing heat into the indoor air to transform into a medium-temperature and medium-pressure refrigerant liquid. The medium-temperature and medium-pressure refrigerant liquid is throttled by the first expansion valve 412 to become a low-temperature and low-pressure refrigerant liquid. The low-temperature and low-pressure refrigerant liquid then passes through the outdoor heat exchanger 300, evaporating and absorbing heat into the outdoor air to transform into a low-temperature and low-pressure refrigerant gas. The low-temperature and low-pressure refrigerant gas is separated by the four-way reversing valve 130 and the gas-liquid separator 121 and returns to the compressor 100. The incompletely evaporated refrigerant liquid is stored in the gas-liquid separator 121, and the lubricating oil collected at the bottom of the gas-liquid separator 121 also returns to the compressor 100.

[0072] 3. The specific operating procedure for achieving the standalone hot water production mode is as follows:

[0073] During rainy weather (hot water heat exchanger 200 should be operated first):

[0074] Refrigerant side: Compressor 100 → Oil return capillary tube 172 → Oil return filter 173 → Oil separator → Three-way reversing valve 140 → Hot water heat exchanger 200 → Second expansion valve 221 (First expansion valve 412 closed) → Outdoor heat exchanger 300 → Four-way reversing valve 130 → Gas-liquid separator 121 → Compressor 100 (Second solenoid valve 921 open, first solenoid valve 911 closed);

[0075] Water side: Hot water tank 600 → Hot water heat exchanger 200 → Hot water tank 600 → Hot water heat exchanger 200 → Hot water tank 600 (until the temperature of the domestic hot water in hot water tank 600 reaches the set value);

[0076] On sunny days (with priority given to solar collector 500), the water side is as follows: hot water tank 600 → solar collector 500 → hot water tank 600 → solar collector 500 → hot water tank 600 (until the temperature of the domestic hot water in hot water tank 600 reaches the set value).

[0077] Specifically, in sunny weather, when the combined cooling, heating, and power system is in standby mode for hot water production, such as... Figure 4As shown, the solar collector 500 is operated first, and the heated domestic hot water is transported to the hot water tank 600 by the second water pump 621a. The hot water then returns to the solar collector 500 to be heated and raised. This process is repeated until the temperature of the hot water tank 600 reaches the set value.

[0078] When the combined cooling, heating, and power system (CCHP) is in standby hot water mode during rainy weather, such as... Figure 3 As shown, the hot water heat exchanger 200 is operated first. The compressor 100 compresses the low-temperature, low-pressure refrigerant gas into a high-temperature, high-pressure refrigerant gas. The gas passes through the oil return separator 171, separating the lubricating oil and the refrigerant. The lubricating oil is filtered and separated by the oil return filter 173, and then evenly distributed through the oil return capillary tube 172 before returning to the compressor 100. At this time, the three-way reversing valve 140 has its B port fully closed and its C port fully open. The high-temperature, high-pressure refrigerant gas discharged from the oil return separator 171 flows from the A port to the C port of the three-way reversing valve 140. The high-temperature, high-pressure refrigerant gas then passes through the three-way reversing valve 140 and the hot water heat exchanger 200, exchanging heat with the hot water tank 600 via the first water pump 611a. The condensation releases heat, resulting in a medium-temperature, medium-pressure refrigerant. The medium-temperature, medium-pressure refrigerant liquid is throttled by the second expansion valve 221 to become a low-temperature, low-pressure refrigerant liquid. At this time, the second solenoid valve 921 is open, the first solenoid valve 911 is closed, and the first expansion valve 412 is closed. The low-temperature, low-pressure refrigerant liquid then passes through the second solenoid valve 921 and the outdoor heat exchanger 300, where it evaporates and absorbs heat from the outdoor air to become a low-temperature, low-pressure refrigerant gas. The low-temperature, low-pressure refrigerant gas is separated by the four-way reversing valve 130 and the gas-liquid separator 121 and returns to the compressor 100. The refrigerant liquid that has not been completely evaporated is stored in the gas-liquid separator 121, and the lubricating oil that accumulates at the bottom of the gas-liquid separator 121 also returns to the compressor 100.

[0079] 4. The specific operating procedure for achieving both cooling and hot water production mode is as follows:

[0080] Cold medium side:

[0081] Refrigerant-side operation flow 1: Compressor 100 → Oil return capillary tube 172 → Oil return filter 173 → Oil separator → Three-way reversing valve 140 → Four-way reversing valve 130 → Outdoor heat exchanger 300 → First expansion valve 412 → Indoor heat exchanger 400 → Four-way reversing valve 130 → Gas-liquid separator 121 → Compressor 100.

[0082] Refrigerant-side operation flow 2: Compressor 100 → Oil return capillary tube 172 → Oil return filter 173 → Oil separator → Three-way reversing valve 140 → Hot water heat exchanger 200 → Second expansion valve 221 → First solenoid valve 911 (Second solenoid valve 921 closed) → Indoor heat exchanger 400 → Four-way reversing valve 130 → Gas-liquid separator 121 → Compressor 100;

[0083] Waterside:

[0084] Hot water tank 600 → Hot water heat exchanger 200 → Hot water tank 600 → Hot water heat exchanger 200 → Hot water tank 600 (until the temperature of the domestic hot water in hot water tank 600 reaches the set value).

[0085] Specifically, when a tri-generation system achieves both cooling and hot water production mode, such as... Figure 5 As shown, compressor 100 compresses low-temperature, low-pressure refrigerant gas into high-temperature, high-pressure refrigerant gas. The lubricating oil and refrigerant are separated by oil return separator 171. The lubricating oil is filtered and separated by oil return filter 173, and then evenly distributed through oil return capillary tube 172 before returning to compressor 100. At this time, both ports B and C of three-way reversing valve 140 are open, achieving refrigerant diversion (the specific refrigerant flow rate can be adjusted according to load requirements by regulating the opening of three-way reversing valve 140). The high-temperature, high-pressure refrigerant gas discharged from oil return separator 171 flows through port A of three-way reversing valve 140 to ports B and C respectively, splitting into two paths. The first path passes through four-way reversing valve 130 and outdoor heat exchanger 300, condensing and releasing heat to the outdoor air, converting it into medium-temperature, medium-pressure refrigerant liquid. The medium-temperature, medium-pressure refrigerant liquid then passes through first expansion valve 41. The first path is a low-temperature, low-pressure refrigerant liquid. The second path passes through the hot water heat exchanger 200, and exchanges heat with the hot water tank 600 through the first water pump 611a. It condenses and releases heat to become a medium-temperature, medium-pressure refrigerant liquid. At this time, the second solenoid valve 921 is closed and the first solenoid valve 911 is open. The medium-temperature, medium-pressure refrigerant liquid is throttled by the second expansion valve 221 to become a low-temperature, low-pressure refrigerant liquid. It mixes with the first path refrigerant liquid, which is throttled by the first expansion valve 412 to become a low-temperature, low-pressure refrigerant liquid. It passes through the indoor heat exchanger 400, evaporates into the indoor air, absorbs heat, and is converted into a low-temperature, low-pressure refrigerant gas. The low-temperature, low-pressure refrigerant gas is separated by the four-way reversing valve 130 and the gas-liquid separator 121 and returns to the compressor 100. The refrigerant liquid that is not completely evaporated is stored in the gas-liquid separator 121, and the lubricating oil that accumulates at the bottom of the gas-liquid separator 121 also returns to the compressor 100.

[0086] 5. The specific operating procedure for achieving both heating and hot water production mode is as follows:

[0087] Cold medium side:

[0088] Refrigerant-side operation flow 1: Compressor 100 → Oil return capillary tube 172 → Oil return filter 173 → Oil separator → Three-way reversing valve 140 → Four-way reversing valve 130 → Indoor heat exchanger 400 → First expansion valve 412 → Outdoor heat exchanger 300 → Four-way reversing valve 130 → Gas-liquid separator 121 → Compressor 100.

[0089] Refrigerant-side operation flow 2: Compressor 100 → Oil return capillary tube 172 → Oil return filter 173 → Oil separator → Three-way reversing valve 140 → Hot water heat exchanger 200 → Water pump 1 → Hot water storage tank 600 → Second expansion valve 221 → Second solenoid valve 921 (First solenoid valve 911 closed) → Outdoor heat exchanger 300 → Four-way reversing valve 130 → Gas-liquid separator 121 → Compressor 100;

[0090] Waterside:

[0091] Hot water tank 600 → Hot water heat exchanger 200 → Hot water tank 600 → Hot water heat exchanger 200 → Hot water tank 600 (until the temperature of the domestic hot water in hot water tank 600 reaches the set value).

[0092] Specifically, when a tri-generation system achieves both heating and hot water production mode, such as Figure 6 As shown, compressor 100 compresses low-temperature, low-pressure refrigerant gas into high-temperature, high-pressure refrigerant gas. The gas passes through oil separator 171, separating lubricating oil and refrigerant. The lubricating oil is filtered and separated by oil return filter 173, and then evenly distributed through oil return capillary tube 172 before returning to compressor 100. At this time, both ports B and C of three-way reversing valve 140 are open, achieving refrigerant diversion (the specific refrigerant flow rate can be adjusted according to load requirements by regulating the opening of three-way reversing valve 140). The high-temperature, high-pressure refrigerant gas discharged from oil separator 171 flows through port A of three-way reversing valve 140 to ports B and C respectively, splitting into two paths. The first path passes through four-way reversing valve 130 and indoor heat exchanger 400, condensing and releasing heat to the outdoor air, transforming into medium-temperature, medium-pressure refrigerant liquid. This medium-temperature, medium-pressure refrigerant liquid then passes through first expansion valve 412. The first path is a low-temperature, low-pressure refrigerant liquid. The second path passes through the hot water heat exchanger 200 and exchanges heat with the hot water tank 600 via the first water pump 611a. The condensation releases heat, resulting in a medium-temperature, medium-pressure refrigerant liquid. At this time, the second solenoid valve 921 is open and the first solenoid valve 911 is closed. The medium-temperature, medium-pressure refrigerant liquid is throttled by the second expansion valve 221 to become a low-temperature, low-pressure refrigerant liquid. It mixes with the first path refrigerant liquid, which is throttled by the first expansion valve 412 to become a low-temperature, low-pressure refrigerant liquid. The mixture passes through the outdoor heat exchanger 300, evaporates into the outdoor air, absorbs heat, and transforms into a low-temperature, low-pressure refrigerant gas. The low-temperature, low-pressure refrigerant gas is separated by the four-way reversing valve 130 and the gas-liquid separator 121 and returns to the compressor 100. The refrigerant liquid that has not been completely evaporated is stored in the gas-liquid separator 121, and the lubricating oil that accumulates at the bottom of the gas-liquid separator 121 also returns to the compressor 100.

[0093] In addition, under sunny outdoor conditions, the solar collector 500 can also be operated simultaneously during the cooling and hot water production modes and the heating and hot water production modes, reducing the operating load and energy consumption of the tri-generation system, so as to further meet the needs of energy conservation and environmental protection.

[0094] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the present invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A combined cooling, heating, and power (CCHP) system for a solar-assisted air source heat pump, characterized in that, The combined heat and power system includes: The compressor (100), hot water heat exchanger (200), outdoor heat exchanger (300), and indoor heat exchanger (400) are connected by a refrigerant pipeline through which the refrigerant flows. A solar collector (500) is used to heat tap water to obtain domestic hot water; A hot water tank (600) is connected to the solar collector (500) via a first water pipe assembly (610), and the hot water tank (600) is connected to the hot water heat exchanger (200) via a second water pipe assembly (620). The refrigerant piping includes: A first piping assembly (700) is connected between the first liquid side (310) of the indoor heat exchanger (400) and the second liquid side (410) of the outdoor heat exchanger (300). The second piping assembly (800) is connected between the air inlet side (210) of the hot water heat exchanger (200) and the compressor (100); The third piping assembly (900) is connected between the outlet side (220) of the hot water heat exchanger (200) and the first piping assembly (700).

2. The combined cooling, heating, and power (CCHP) system according to claim 1, characterized in that, The first water pipe assembly (610) includes: The first water inlet pipe (611) is connected between the first water inlet (630) of the hot water tank (600) and the first water outlet (230) of the hot water heat exchanger (200); The first water outlet pipe (612) is connected between the first water outlet (640) of the hot water tank (600) and the first water inlet (240) of the hot water heat exchanger (200).

3. The combined cooling, heating, and power (CCHP) system according to claim 1, characterized in that, The second water pipe assembly (620) includes: The second water inlet pipe (621) is connected between the second water inlet (650) of the hot water tank (600) and the second water outlet (510) of the solar collector (500); The second water outlet pipe (622) is connected between the second water outlet (660) of the hot water tank (600) and the second water inlet (520) of the solar collector (500).

4. The tri-generation system according to any one of claims 2 or 3, characterized in that, The refrigerant piping also includes: The first connecting pipe (320) is disposed on the first air side (330) of the outdoor heat exchanger (300). The second connecting pipe (420) is disposed on the second gas side (430) of the indoor heat exchanger (400). The third connecting pipe (110) is disposed at the first input end (120) of the compressor (100). The third connecting pipe (110) is connected to the first connecting pipe (320) and the second connecting pipe (420) respectively.

5. The combined cooling, heating, and power (CCHP) system according to claim 4, characterized in that, The combined heat and power system includes: A four-way reversing valve (130) is disposed at the connection between the third connecting pipe (110) and the first connecting pipe (320) and the second connecting pipe (420); A three-way reversing valve (140) is disposed between the air inlet side (210) of the hot water heat exchanger (200) and the compressor (100); The refrigerant pipeline also includes a fourth connecting pipe (150) for connecting the three-way reversing valve (140) and the four-way reversing valve (130).

6. The combined cooling, heating, and power (CCHP) system according to claim 1, characterized in that, The combined cooling, heating, and power (CCHP) system also includes a first expansion valve (412), and the first piping assembly (700) includes: The first branch pipe (710) is disposed on the first liquid side (310) of the outdoor heat exchanger (300). The second branch pipe (720) is disposed on the second liquid side (410) of the indoor heat exchanger (400), and the second branch pipe (720) is connected to the first branch pipe (710); The first expansion valve (412) is located at the connection between the first branch pipe (710) and the second branch pipe (720).

7. The combined cooling, heating, and power (CCHP) system according to claim 6, characterized in that, The combined cooling, heating, and power supply system further includes a second expansion valve (221) disposed on the liquid outlet side (220), and the third pipeline assembly (900) includes: The third branch pipe (910) is disposed between the second expansion valve (221) and the second branch pipe (720); A fourth branch pipe (920) is disposed between the first branch pipe (710) and the third branch pipe (910); The combined cooling, heating, and power supply system further includes a first solenoid valve (911) installed on the third branch pipe (910) and a second solenoid valve (921) installed on the fourth branch pipe (920).

8. The combined cooling, heating, and power (CCHP) system according to claim 5, characterized in that, The combined heat and power system also includes: A gas-liquid separator (121) is disposed between the four-way reversing valve (130) and the compressor (100).

9. The combined cooling, heating, and power (CCHP) system according to claim 8, characterized in that, The combined heat and power system also includes: An oil return separator (171) is provided between the three-way reversing valve (140) and the output end (170) of the compressor (100) to separate the refrigerant from the lubricating oil. Oil return capillary (172), which is disposed at the output end (170); A return oil filter (173) is disposed between the return oil capillary (172) and the return oil separator (171); The refrigerant pipeline also includes a fifth connecting pipe (161) disposed at the second input end (160) of the compressor (100), the oil return separator (171) is provided with a first outlet (171a), and the fifth connecting pipe (161) is used to connect the second input end (160) and the first outlet (171a).

10. The combined cooling, heating, and power (CCHP) system according to claim 9, characterized in that, The oil return separator (171) is also provided with a first inlet (171b) and a second outlet (171c), and the second pipeline assembly (800) includes: The fifth branch pipe (810) is located between the three-way reversing valve (140) and the hot water heat exchanger (200); The sixth branch pipe (820) is disposed between the three-way reversing valve (140) and the second outlet (171c); The seventh branch pipe (830) is disposed between the return oil filter (173) and the first inlet (171b).

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