Heat pump system

Abstract

The embodiment of the utility model provides a heat pump system which comprises a water tank assembly and a heat pump circulation loop, the water tank assembly comprises an inner container and a water tank heat exchanger exchanging heat with the inner container, and the heat pump circulation loop comprises a refrigerant circulation pipeline, an air source heat exchanger, a water-ground source heat exchange assembly and a hydraulic module. The hydraulic module comprises a water-fluorine heat exchanger; the air source heat exchanger, the water and ground source heat exchange assembly, the water fluorine heat exchanger and the water tank heat exchanger are all arranged on the refrigerant circulation pipeline, and a refrigerant flowing through the water tank heat exchanger along the refrigerant circulation pipeline at least passes through the air source heat exchanger and the water and ground source heat exchange assembly. According to the heat pump system, the heat exchange capacity can be effectively improved.

Description

Technical Field

[0001] This application relates to the technical field of heat pump systems, and particularly to a heat pump system. Background Art

[0002] In related technologies, air-source heat exchangers are generally used in heat pump water heaters for heat exchange. However, the energy efficiency and heat exchange capacity of air-source heat exchangers are low in low-temperature environments, resulting in poor user experience and difficulty in meeting the usage requirements in low-temperature regions. Summary of the Utility Model

[0003] In view of this, embodiments of this application are expected to provide a heat pump system capable of improving heat exchange capacity.

[0004] To achieve the above object, an embodiment of this application provides a heat pump system, including:

[0005] A water tank assembly, which includes an inner tank and a water tank heat exchanger that exchanges heat with the inner tank;

[0006] A heat pump circulation loop, which includes a refrigerant circulation pipeline, an air-source heat exchanger, a water-source and ground-source heat exchange assembly, and a hydraulic module. The hydraulic module includes a water-to-refrigerant heat exchanger. The air-source heat exchanger, the water-source and ground-source heat exchange assembly, the water-to-refrigerant heat exchanger, and the water tank heat exchanger are all arranged on the refrigerant circulation pipeline, and the refrigerant flowing through the water tank heat exchanger along the refrigerant circulation pipeline passes through at least the air-source heat exchanger and the water-source and ground-source heat exchange assembly.

[0007] In one implementation, the air-source heat exchanger and the water-source and ground-source heat exchange assembly are connected in series.

[0008] In one implementation, the refrigerant circulation pipeline has a refrigerant circulation channel. The water-source and ground-source heat exchange assembly includes a water-source and ground-source pipeline, a water-source and ground-source heat exchange tube with a heat exchange channel, and a water-to-refrigerant heat exchanger with a first refrigerant channel and a first water flow channel. The water-to-refrigerant heat exchanger is arranged on the refrigerant circulation pipeline. The first refrigerant channel is communicated with the refrigerant circulation channel. The water-source and ground-source heat exchange tube is arranged on the water-source and ground-source pipeline. The heat exchange channel is communicated with the first water flow channel through the water-source and ground-source pipeline.

[0009] In one implementation, the water-source and ground-source heat exchange assembly further includes a first water pump, and the first water pump is arranged on the water-source and ground-source pipeline; and / or

[0010] The water-source and ground-source heat exchange assembly further includes a stop valve, and the stop valve is arranged on the water-source and ground-source pipeline.

[0011] In one embodiment, the heat pump cycle circuit includes a compressor and a four-way valve disposed on the refrigerant circulation pipeline. The refrigerant flowing along the refrigerant circulation pipeline circulates among the compressor, the four-way valve, the water-fluorine heat exchanger, the water-earth source heat exchange assembly, and the air source heat exchanger. The water tank heat exchanger is disposed between the compressor and the four-way valve.

[0012] In one embodiment, the air source heat exchanger, the water-earth source heat exchange assembly, and the water-fluorine heat exchanger are connected in series in sequence. The four-way valve has a first valve port, a second valve port, a third valve port, and a fourth valve port. The refrigerant outlet of the water tank heat exchanger is communicated with the first valve port. The second valve port is communicated with the refrigerant inlet of the water tank heat exchanger through the compressor. The third valve port is communicated with the water-fluorine heat exchanger. The fourth valve port is communicated with the air source heat exchanger. By switching the four-way valve, the first valve port is communicated with the third valve port, and the fourth valve port is communicated with the second valve port, or the first valve port is communicated with the fourth valve port, and the third valve port is communicated with the second valve port.

[0013] In one embodiment, the heat pump cycle circuit includes a refrigerant heat dissipation device. The refrigerant heat dissipation device includes a heat dissipation plate and refrigerant heat dissipation pipes disposed on the heat dissipation plate. The air source heat exchanger, the water-earth source heat exchange assembly, the water-fluorine heat exchanger, and the refrigerant heat dissipation pipes are connected in series on the refrigerant circulation pipeline in sequence.

[0014] In one embodiment, opposite ends of the refrigerant heat dissipation pipes extend outside the heat dissipation plate. The heat pump system includes a heat dissipation pipe temperature sensing member. The heat dissipation pipe temperature sensing member is disposed on the refrigerant heat dissipation pipes and is located between the water-earth source heat exchange assembly and the heat dissipation plate.

[0015] In one embodiment, the refrigerant circulation pipeline has a refrigerant circulation channel. The water tank heat exchanger has a second refrigerant channel and a second water flow channel. The water tank assembly further includes a water tank pipeline and a second water pump. The second refrigerant channel is communicated with the refrigerant circulation channel. The second water flow channel is communicated with the inner tank through the water tank pipeline. The second water pump is disposed on the water tank pipeline.

[0016] In one embodiment, the heat pump system includes a water system terminal. The water system terminal exchanges heat with the water-fluorine heat exchanger.

[0017] In one embodiment, the water system terminal is an air conditioner indoor unit or a floor heating system.

[0018] The embodiment of the present application provides a heat pump system. By arranging an air source heat exchanger and a water-source and ground-source heat exchange component, the heat pump system can utilize the air source heat exchanger and the water-source and ground-source heat exchange component simultaneously for heat exchange in an environment with a relatively low temperature, so as to realize the function of heating water in the water tank assembly. Thus, the heat exchange capacity of the heat pump system in a low-temperature environment can be improved, and the use requirements in low-temperature regions can be met accordingly. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of a heat pump system according to an embodiment of the present application;

[0020] Figure 2 is Figure 1 a schematic diagram of the refrigerant flow direction in the heat pump system when the water system terminal in

[0021] Figure 3 is Figure 1 a schematic diagram of the refrigerant flow direction in the heat pump system when the water system terminal in

[0022] DESCRIPTION OF THE REFERENCE NUMERALS

[0023] 10. Water tank assembly; 11. Water tank heat exchanger; 12. Inner tank; 13. Water tank pipeline; 14. Second water pump; 20. Water-source and ground-source heat exchange component; 21. Water-source and ground-source pipeline; 22. Water-source and ground-source heat exchanger; 23. First water pump; 24. Stop valve; 25. Water-source and ground-source heat exchange pipe; 30. Air source heat exchanger; 31. Refrigerant temperature sensor; 40. Hydraulic module; 41. Water-fluorine heat exchanger; 42. Third water pump; 43. Water system pipeline; 50. Heat pump circulation loop; 51. Refrigerant circulation pipeline; 52. Compressor; 53. Four-way valve; a. First valve port; b. Second valve port; c. Third valve port; d. Fourth valve port; 60. Water system terminal; 70. Fan; 80. Refrigerant heat dissipation device; 81. Heat dissipation plate; 82. Refrigerant heat dissipation pipe; 83. Heat dissipation pipe temperature sensor. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The embodiment of the present application provides a heat pump system. Please refer to Figure 1 , the heat pump system includes a water tank assembly 10 and a heat pump circulation loop 50.

[0025] The water tank assembly 10 includes an inner tank 12 and a water tank heat exchanger 11 that exchanges heat with the inner tank 12. The heat pump circulation loop 50 includes a refrigerant circulation pipeline 51, an air source heat exchanger 30, a water and ground source heat exchange assembly 20, and a hydraulic module 40. The hydraulic module 40 includes a water and fluorine heat exchanger 41. The air source heat exchanger 30, the water and ground source heat exchange assembly 20, the water and fluorine heat exchanger 41, and the water tank heat exchanger 11 are all arranged on the refrigerant circulation pipeline 51, and the refrigerant flowing through the water tank heat exchanger 11 along the refrigerant circulation pipeline 51 passes through at least the air source heat exchanger 30 and the water and ground source heat exchange assembly 20.

[0026] The inner tank 12 is used to store domestic water, and the water tank heat exchanger 11 is used to exchange heat with the domestic water in the inner tank 12 to heat the domestic water in the inner tank 12 into hot water. That is to say, the water tank assembly 10 has the function of making hot water.

[0027] Please refer to Figure 1 , a compressor 52 is arranged on the refrigerant circulation pipeline 51. The refrigerant circulation pipeline 51 has a refrigerant circulation channel, and under the action of the compressor 52, the refrigerant can circulate along the refrigerant circulation channel.

[0028] By circulating along the refrigerant circulation channel, the refrigerant can, when flowing through the water tank heat exchanger 11, realize the heat exchange between the water tank heat exchanger 11 and the domestic water in the inner tank 12.

[0029] The main function of the hydraulic module 40 is to realize the heat exchange at the end 60 of the water system.

[0030] The end 60 of the water system is a device that relies on hot water or cooling water to realize the heating function or the cooling function. Exemplarily, the end 60 of the water system includes, but is not limited to, equipment such as an air conditioner indoor unit, a floor heating, etc.

[0031] Specifically, the water and fluorine heat exchanger 41 has a third refrigerant channel and a third water flow channel. The refrigerant flowing along the refrigerant circulation pipeline 51 passes through the third refrigerant channel and exchanges heat with the water in the third water flow channel, so that the water in the third water flow channel is heated into hot water or cooled into cooling water. The hot water or cooling water flows into the end 60 of the water system, thereby realizing the heating function or the cooling function of the end 60 of the water system.

[0032] It should be noted that the heat pump system of the present application can be configured with the end 60 of the water system or not. For the heat pump system configured with the end 60 of the water system, it is equivalent that the heat pump system comes with the end 60 of the water system when leaving the factory. During the installation process of the heat pump system for users, the end 60 of the water system will also be installed. For the heat pump system not configured with the end 60 of the water system, it is equivalent that the heat pump system does not have the end 60 of the water system when leaving the factory. The hydraulic module 40 can be set as a reserved module on the refrigerant circulation pipeline 51. If the user wants to add the end 60 of the water system later, then the end 60 of the water system is installed separately.

[0033] The main function of the air source heat exchanger 30 is to exchange heat between the refrigerant and the air. Please refer to Figure 1 , and the air source heat exchanger 30 is generally used in conjunction with the blower 70.

[0034] Please continue to refer to Figure 1 , the main function of the water and ground source heat exchange assembly 20 is to exchange heat between the refrigerant and water resources and / or between the refrigerant and underground resources. That is to say, the water and ground source heat exchange assembly 20 can use water resources to exchange heat with the refrigerant, or use underground resources to exchange heat with the refrigerant, or simultaneously use water resources and underground resources to exchange heat with the refrigerant. Among them, water resources include but are not limited to river water resources, sewage resources, etc. Using sewage resources is beneficial to the heat recovery of wastewater and has good application prospects.

[0035] Water resources and underground resources can transfer heat to the refrigerant during the heating process of domestic water.

[0036] In some other embodiments, for the water system terminal 60 provided with a refrigeration function, water resources and underground resources can also be used to absorb the heat of the refrigerant during the refrigeration process of the water system terminal 60.

[0037] The refrigerant flowing through the water tank heat exchanger 11 along the refrigerant circulation pipeline 51 passes through at least the air source heat exchanger 30 and the water and ground source heat exchange assembly 20, which means that the refrigerant flowing through the water tank heat exchanger 11 circulates at least among the water tank heat exchanger 11, the air source heat exchanger 30 and the water and ground source heat exchange assembly 20. However, the refrigerant flowing through the water tank heat exchanger 11 can pass through the water and fluorine heat exchanger 41, that is, the refrigerant can circulate among the water tank heat exchanger 11, the air source heat exchanger 30, the water and ground source heat exchange assembly 20 and the water and fluorine heat exchanger 41. The refrigerant flowing through the water tank heat exchanger 11 can also not pass through the water and fluorine heat exchanger 41. For example, a separate refrigerant circulation path can be formed between the water and fluorine heat exchanger 41 and the air source heat exchanger 30, or among the water and fluorine heat exchanger 41, the air source heat exchanger 30 and the water and ground source heat exchange assembly 20.

[0038] By providing the air source heat exchanger 30 and the water and ground source heat exchange assembly 20 in the heat pump system according to the embodiments of the present application, heat exchange can be carried out by simultaneously using the air source heat exchanger 30 and the water and ground source heat exchange assembly 20 in an environment with a relatively low temperature, so as to realize the function of heating hot water of the water tank assembly 10. Thus, the heat exchange capacity of the heat pump system in a low-temperature environment can be improved, and further the use requirements in low-temperature regions can be met.

[0039] It should be noted that the heat pump system in the embodiments of the present application is not limited to simultaneously using the air source heat exchanger 30 and the water and ground source heat exchange component 20 for heat exchange. According to different usage requirements, the heat pump system can simultaneously use the air source heat exchanger 30 and the water and ground source heat exchange component 20 for heat exchange, or can only use the air source heat exchanger 30 for heat exchange.

[0040] In one embodiment, please refer to Figure 1 , the water tank heat exchanger 11 may have a second refrigerant channel and a second water flow channel. The water tank assembly 10 further includes a water tank pipeline 13 and a second water pump 14. The second refrigerant channel communicates with the refrigerant circulation channel. The second water flow channel communicates with the inner tank 12 through the water tank pipeline 13, and the second water pump 14 is arranged on the water tank pipeline 13.

[0041] The water tank pipeline 13 connects the second water flow channel and the inner tank 12, so that the second water pump 14 drives the water flow to circulate between the water tank heat exchanger 11 and the inner tank 12. When the water flow passes through the second water flow channel, it exchanges heat with the refrigerant in the second refrigerant channel through the water tank heat exchanger 11. The water flow after absorbing heat and rising in temperature enters the inner tank 12 through the water tank pipeline 13, thereby realizing the heating of the domestic water in the inner tank 12.

[0042] In other embodiments, the water tank heat exchanger 11 may also adopt other heat exchange forms. For example, the water tank heat exchanger 11 may be a microchannel heat exchanger or the like.

[0043] In one embodiment, please refer to Figure 1 , the water and ground source heat exchange component 20 includes a water and ground source pipeline 21, a water and ground source heat exchange tube 25 having a heat exchange channel, and a water and ground source heat exchanger 22 having a first refrigerant channel and a first water flow channel. The water and ground source heat exchanger 22 is arranged on the refrigerant circulation pipeline 51. The first refrigerant channel communicates with the refrigerant circulation channel, and the refrigerant circulating in the refrigerant circulation channel flows through the first refrigerant channel.

[0044] The water and ground source heat exchange tube 25 is arranged on the water and ground source pipeline 21. The heat exchange channel communicates with the first water flow channel through the water and ground source pipeline 21, so that the water flow circulates between the water and ground source heat exchange tube 25 and the water and ground source heat exchanger 22. When the water flow passes through the heat exchange channel, it exchanges heat with water resources and / or underground resources through the water and ground source heat exchange tube 25. The water flow after flowing through the heat exchange channel flows into the first water flow channel and exchanges heat with the refrigerant in the first refrigerant channel through the water and ground source heat exchanger 22. That is to say, the water flow circulates in the water and ground source heat exchanger 22 and the water and ground source heat exchange tube 25, so that the refrigerant in the first refrigerant channel exchanges heat with water resources and / or underground resources through the water and ground source heat exchange component 20.

[0045] In one embodiment, please refer to Figure 1, the water and ground source heat exchange assembly 20 may further be provided with a first water pump 23. The first water pump 23 is arranged on the water and ground source pipeline 21 to drive the water flow to circulate between the water and ground source heat exchange pipe 25 and the water and ground source heat exchanger 22.

[0046] Please refer to Figure 1 , the water and ground source heat exchange assembly 20 may further be provided with a stop valve 24. The stop valve 24 is arranged on the water and ground source pipeline 21 to conduct or cut off the water and ground source pipeline 21.

[0047] Figure 1 As shown, the water and ground source heat exchange assembly 20 is provided with two stop valves 24. The two stop valves 24 are respectively located on both sides of the water and ground source heat exchange pipe 25. In some other embodiments, the water and ground source heat exchange assembly 20 may also be provided with only one stop valve 24.

[0048] In one embodiment, please refer to Figure 1 , the hydraulic module 40 may be provided with a water system pipeline 43 and a third water pump 42. The third refrigerant channel is communicated with the refrigerant circulation channel. The second water flow channel is communicated with the water system end 60 through the water system pipeline 43. The third water pump 42 is arranged on the water system pipeline 43 to drive the water flow to circulate between the water and fluorine heat exchanger 41 and the water system end 60. When the third water pump 42 is started, heat exchange is carried out between the water and fluorine heat exchanger 41 and the water system end 60, and the water system end 60 turns on the cooling or heating mode. When the third water pump 42 is not started, although the water system end 60 does not turn on the cooling or heating mode, it does not affect the normal operation of other components of the water pump system, and the water tank assembly 10 can still heat domestic hot water.

[0049] In one embodiment, please refer to Figure 1 , the air source heat exchanger 30 and the water and ground source heat exchange assembly 20 may be connected to the refrigerant circulation pipeline 51 in series to simplify the structure of the refrigerant circulation pipeline 51.

[0050] In some other embodiments, the air source heat exchanger 30 and the water and ground source heat exchange assembly 20 may also be connected to the refrigerant circulation pipeline 51 in parallel.

[0051] In one embodiment, please refer to Figure 1 , the heat pump circulation loop 50 may be provided with a four-way valve 60. The refrigerant flowing along the refrigerant circulation pipeline 51 circulates between the compressor 52, the four-way valve 53, the water and fluorine heat exchanger 41, the water and ground source heat exchange assembly 20 and the air source heat exchanger 30. The water tank heat exchanger 11 is arranged between the compressor 50 and the four-way valve 60.

[0052] For a water system terminal 60 such as an air conditioner indoor unit with a refrigeration function and a heating function, by setting a four-way valve 53 and arranging the water tank heat exchanger 11 between the compressor 52 and the four-way valve 53, the domestic water in the inner tank 12 can be heated while the water system terminal 60 starts the refrigeration mode or the heating mode, thus greatly improving the convenience of using the heat pump system.

[0053] Exemplarily, please refer to Figure 1 , the air source heat exchanger 30, the water and ground source heat exchange assembly 20, and the water and fluorine heat exchanger 41 are connected in series in sequence. The four-way valve 53 has a first valve port a, a second valve port b, a third valve port c, and a fourth valve port d. The refrigerant outlet of the water tank heat exchanger 11 is communicated with the first valve port a, the second valve port b is communicated with the refrigerant inlet of the water tank heat exchanger 11 through the compressor 52, the third valve port c is communicated with the water and fluorine heat exchanger 41, and the fourth valve port d is communicated with the air source heat exchanger 30. By switching the four-way valve 53, the first valve port a is communicated with the third valve port c, and the fourth valve port d is communicated with the second valve port b, or the first valve port a is communicated with the fourth valve port d, and the third valve port c is communicated with the second valve port b.

[0054] Specifically, taking the cooperation between the hydraulic module 40 and the air conditioner indoor unit as an example, please refer to Figure 3 , when the air conditioner indoor unit starts the refrigeration mode, the first valve port a of the four-way valve 53 is communicated with the fourth valve port d, and the third valve port c is communicated with the second valve port b. The refrigerant flows out from the refrigerant outlet of the compressor 52 along the refrigerant circulation channel in the refrigerant circulation pipeline 51, successively flows through the water tank heat exchanger 11, the four-way valve 53, the air source heat exchanger 30, the water and ground source heat exchange assembly 20, the water and fluorine heat exchanger 41, the four-way valve 53, and then enters the compressor 52 from the refrigerant inlet of the compressor 52, thus completing a cycle.

[0055] Please refer to Figure 2 , when the air conditioner indoor unit starts the heating mode, the first valve port a of the four-way valve 53 is communicated with the third valve port c, and the fourth valve port d is communicated with the second valve port b. The refrigerant flows out from the refrigerant outlet of the compressor 52 along the refrigerant circulation channel in the refrigerant circulation pipeline 51, successively flows through the water tank heat exchanger 11, the four-way valve 53, the water and fluorine heat exchanger 41, the water and ground source heat exchange assembly 20, the air source heat exchanger 30, the four-way valve 53, and then enters the compressor 52 from the refrigerant inlet of the compressor 52, thus completing a cycle.

[0056] In one embodiment, please refer to Figure 1 , the heat pump circulation loop 50 can be provided with a refrigerant heat dissipation device 80. The refrigerant heat dissipation device 80 includes a heat dissipation plate 81 and a refrigerant heat dissipation pipe 82 arranged on the heat dissipation plate 81. The refrigerant heat dissipation device 80 is used for dissipating heat from the electronic control module in the heat pump system.

[0057] Specifically, the air source heat exchanger 30, the water source heat exchanger assembly 20, the water-fluorine heat exchanger 41, and the refrigerant heat dissipation pipe 82 can be connected in series on the refrigerant circulation pipeline 51 in sequence. When the refrigerant flows through the air source heat exchanger 30, the water source heat exchanger assembly 20, the refrigerant heat dissipation pipe 82, and the water-fluorine heat exchanger 41 in the heat pump system in sequence, the refrigerant with a lower temperature can enter the refrigerant heat dissipation pipe 82 to achieve the purpose of heat dissipation.

[0058] Exemplarily, please refer to Figure 1 , the opposite ends of the refrigerant heat dissipation pipe 82 extend to the outside of the heat dissipation plate 81. The heat pump system includes a heat dissipation pipe temperature sensing element 83. The heat dissipation pipe temperature sensing element 83 is arranged on the refrigerant heat dissipation pipe 82 and is located between the water source heat exchanger assembly 20 and the heat dissipation plate 81. The heat dissipation pipe temperature sensing element 83 is used to measure the temperature T1 of the refrigerant heat dissipation pipe 82 in real time.

[0059] Next, taking the Figure 1 shown heat pump system as an example, the control methods that the heat pump system of the embodiment of the present application can adopt will be briefly introduced.

[0060] In one embodiment, for the water system terminal 60 that needs to be refrigerated, the heat pump system may have the following control steps:

[0061] Step S101: Turn on the compressor 52, the fan 70, the first water pump 23, and the third water pump 42 to enable the water system terminal 60 to enter the refrigeration mode;

[0062] If it is necessary to heat the domestic water in the inner tank 12 during the refrigeration process, the second water pump 14 also needs to be turned on to enable the water tank assembly 10 to enter the domestic hot water mode, which is equivalent to the heat pump system operating in the refrigeration + domestic hot water mode at this time.

[0063] Step S102: Determine whether the temperature T1 of the refrigerant heat dissipation pipe 82 is less than the outdoor ambient temperature T0;

[0064] Exemplarily, the heat pump system can set the outdoor ambient temperature T0 for measuring the outdoor ambient temperature T0.

[0065] Step S103: If not, maintain the current operating state;

[0066] Step S104: If so, turn off the fan 70 and continue to determine whether the temperature T1 of the refrigerant heat dissipation pipe 82 is less than the outdoor ambient temperature T0;

[0067] Step S105: If not, continue to maintain the current operating state;

[0068] Step S106: If so, turn off the first water pump 23 and turn on the fan 70, and continue to determine whether the temperature T1 of the refrigerant heat dissipation pipe 82 is less than the outdoor ambient temperature T0;

[0069] Step S107: If not, then continue to maintain the current operating state;

[0070] Step S108: If so, then reduce the rotational speed of the blower 70 until the blower 70 is turned off, and determine whether the temperature T1 of the refrigerant heat dissipation pipe 82 is greater than the outdoor ambient temperature T0 + a, where a is the dead band parameter (standard value).

[0071] Step S109: If not, then continue to maintain the current operating state;

[0072] Step S110: If so, then turn on the first water pump 23 and the blower 70.

[0073] Specifically, when the first water pump 23 and the blower 70 are turned on, both the air source heat exchanger 30 and the water - ground source heat exchange assembly can efficiently exchange heat with the refrigerant to reduce the temperature of the refrigerant. Therefore, the above - mentioned control steps can be understood as minimizing the on - time of the first water pump 23 and the blower 70, or reducing the operating power of the blower 70, when the refrigerant heat dissipation device 80 has a good heat dissipation effect (i.e., the temperature T1 of the refrigerant heat dissipation pipe 82 is less than the outdoor ambient temperature T0).

[0074] In one embodiment, for the water system terminal 60 that needs to be heated, the heat pump system may have the following control steps:

[0075] Step N101: Turn on the compressor 52, the blower 70, the first water pump 23, and the third water pump 42, and power on the four - way valve 53 to enable the water system terminal 60 to enter the heating mode;

[0076] If it is necessary to heat the domestic water in the inner tank 12 during the heating process, then the second water pump 14 also needs to be turned on to enable the water tank assembly 10 to enter the domestic hot water mode, which is equivalent to the heat pump system operating in the heating + domestic hot water mode at this time.

[0077] Step N102: Determine whether the temperature T2 of the refrigerant flowing out of the water - ground source heat exchanger 22 is greater than the outdoor ambient temperature T0;

[0078] Exemplarily, please refer to Figure 1 , the heat pump system includes a refrigerant temperature sensor 31 disposed between the air source heat exchanger 30 and the water - ground source heat exchanger 22, and the refrigerant temperature sensor 31 is used to detect the temperature T2 of the refrigerant flowing out of the water - ground source heat exchanger 22.

[0079] Step N103: If not, then maintain the current operating state;

[0080] Step N104: If so, then turn off the blower 70, and continue to determine whether the temperature T2 of the refrigerant flowing out of the water - ground source heat exchanger 22 is less than the outdoor ambient temperature T0 - b, where b is the dead band parameter (standard value).

[0081] Step N105: If not, maintain the current operating state;

[0082] Step N106: If so, turn on the blower 70.

[0083] When the water system end 60 is in the heating mode, the refrigerant absorbs heat at the air source heat exchanger 30 and the water-source ground heat exchanger 22. However, if the temperature T2 of the refrigerant flowing out of the water-source ground heat exchanger 22 is greater than or equal to the outdoor ambient temperature T0, the refrigerant cannot absorb heat at the air source heat exchanger 30. Therefore, the blower 70 can be turned off to reduce energy consumption.

[0084] It should be noted that when only the domestic water in the inner tank 12 needs to be heated and the water system end 60 does not need to be turned on, that is, when the heat pump system only needs to operate in the domestic hot water mode, the above similar control steps can also be adopted, but step N101 needs to be adjusted to: turn on the compressor 52, the blower 70, the first water pump 23 and the second water pump 14, and the four-way valve 53 is powered on.

[0085] In one embodiment, the heat pump system can be set to operate in the summer working mode. For the summer working mode, the following control method can be adopted:

[0086] Step M101: Determine that the heat pump system enters the summer standby state;

[0087] Step M102: Judge whether the outlet water temperature of the water-fluorine radiator 41 is greater than the first set temperature TS1 + e, and whether the water temperature of the inner tank 12 is less than or greater than the second set temperature TS2 - d, or whether the outlet water temperature of the water-fluorine radiator 41 is less than the first set temperature TS1 + e, and whether the water temperature of the inner tank 12 is less than the second set temperature TS2 - d; where e and d are both dead-band parameters (standard values).

[0088] Step M103: If the judgment conditions in step M102 are not satisfied, the heat pump system remains in the summer standby state;

[0089] Step M104: If the outlet water temperature of the water-fluorine radiator 41 is greater than the first set temperature TS1 + e, and the water temperature of the inner tank 12 is less than the second set temperature TS2 - d, the heat pump system enters the refrigeration + domestic hot water mode, and judge whether the outlet water temperature of the water-fluorine radiator 41 is less than the first set temperature TS1, and whether the water temperature of the inner tank 12 is greater than the second set temperature TS2;

[0090] When the heat pump system enters the refrigeration + domestic hot water mode, the compressor 52, the blower 70, the first water pump 23, the second water pump 14 and the third water pump 42 are turned on to make the water system end 60 enter the refrigeration mode, and the water tank assembly 10 enters the domestic hot water mode.

[0091] Step M105: If so, the heat pump system enters the summer standby state;

[0092] Step M106: If not, the heat pump system maintains the operation in the cooling + domestic hot water mode.

[0093] Step M107: During the process of the heat pump system operating in the cooling + domestic hot water mode, if it is determined that the outlet water temperature of the water - fluorine radiator 41 is less than the first set temperature TS1 and the water temperature in the inner tank 12 is less than the second set temperature TS2, the heat pump system operates in the domestic hot water mode alone; if it is determined that the outlet water temperature of the water - fluorine radiator 41 is greater than the first set temperature TS1 and the water temperature in the inner tank 12 is greater than the second set temperature TS2, the heat pump system operates in the cooling mode alone;

[0094] When the heat pump system operates in the domestic hot water mode alone, the third water pump 42 is closed and the second water pump 14 remains open.

[0095] When the heat pump system operates in the cooling mode alone, the second water pump 14 is closed and the third water pump 42 remains open.

[0096] Step M108: If the conditions in Step M107 are not met, the heat pump system maintains the operation in the cooling + domestic hot water mode.

[0097] Step M109: If the outlet water temperature of the water - fluorine radiator 41 is greater than the first set temperature TS1 + e and the water temperature in the inner tank 12 is greater than the second set temperature TS2 - d, the heat pump system operates in the cooling mode alone and determines whether the outlet water temperature of the water - fluorine radiator 41 is less than the first set temperature TS1;

[0098] Step M110: If not, the heat pump system maintains the operation in the cooling mode alone;

[0099] Step M111: If so, the heat pump system enters the summer standby state.

[0100] Step M112: If the outlet water temperature of the water - fluorine radiator 41 is less than the first set temperature TS1 + e and the water temperature in the inner tank 12 is less than the second set temperature TS2 - d, the heat pump system operates in the domestic hot water mode alone and determines whether the water temperature in the inner tank 12 is greater than the second set temperature TS2;

[0101] Step M113: If not, the heat pump system maintains the operation in the domestic hot water mode alone;

[0102] Step M114: If so, the heat pump system enters the summer standby state.

[0103] The above control method can be understood as follows: when the outlet water temperature of the water-fluorine radiator 41 is greater than the first set temperature TS1 + e (or greater than TS1), the end 60 of the water system switches to the cooling mode. When the water temperature in the inner tank 12 is less than the second set temperature TS2 - d (or less than TS2), the domestic water in the inner tank 12 is heated to keep the water temperature of the domestic water in the inner tank 12 above the base water temperature (the second set temperature TS2).

[0104] In one embodiment, the heat pump system can be set to operate in the winter mode. For the winter mode, the following control method can be adopted:

[0105] Step P101: Determine that the heat pump system enters the winter standby state;

[0106] Step P102: Judge whether the outlet water temperature of the water-fluorine radiator 41 is less than the third set temperature TS3 + e, and the water temperature in the inner tank 12 is less than or greater than the fourth set temperature TS4 - d; or whether the outlet water temperature of the water-fluorine radiator 41 is greater than the third set temperature TS3 + e, and the water temperature in the inner tank 12 is less than the fourth set temperature TS4 - d, where e and d are both dead-band parameters (standard values).

[0107] Step P103: If the judgment conditions in Step P102 are not satisfied, the heat pump system remains in the winter standby state;

[0108] Step P104: If the outlet water temperature of the water-fluorine radiator 41 is less than the third set temperature TS3 + e, and the water temperature in the inner tank 12 is less than the fourth set temperature TS4 - d, the heat pump system enters the heating + domestic hot water mode, and judge whether the outlet water temperature of the water-fluorine radiator 41 is greater than the third set temperature TS3, and the water temperature in the inner tank 12 is greater than the fourth set temperature TS4;

[0109] When the heat pump system enters the heating + domestic hot water mode, the compressor 52, the fan 70, the first water pump 23, the second water pump 14, and the third water pump 42 are turned on, and the four-way valve 53 is powered on to make the end 60 of the water system enter the heating mode, and the water tank assembly 10 enters the domestic hot water mode.

[0110] Step P105: If so, the heat pump system enters the winter standby state;

[0111] Step P106: If not, the heat pump system remains in the heating + domestic hot water mode.

[0112] Step P107: During the operation of the heat pump system in the heating + domestic hot water mode, if it is determined that the outlet water temperature of the water - fluorine radiator 41 is greater than the third set temperature TS3, and the water temperature in the inner tank 12 is less than the fourth set temperature TS4, then the heat pump system operates in the domestic hot water mode alone; if it is determined that the outlet water temperature of the water - fluorine radiator 41 is less than the third set temperature TS3, and the water temperature in the inner tank 12 is greater than the fourth set temperature TS4, then the heat pump system operates in the heating mode alone.

[0113] When the heat pump system operates in the heating mode alone, the second water pump 14 is closed, the third water pump 42 remains open, and the four - way valve remains powered on.

[0114] Step P108: If the conditions in Step P107 are not met, then the heat pump system continues to operate in the heating + domestic hot water mode.

[0115] Step P109: If the outlet water temperature of the water - fluorine radiator 41 is less than the third set temperature TS3 + e, and the water temperature in the inner tank 12 is greater than the fourth set temperature TS4 - d, then the heat pump system operates in the heating mode alone and determines whether the outlet water temperature of the water - fluorine radiator 41 is greater than the third set temperature TS3.

[0116] Step P110: If not, then the heat pump system continues to operate in the heating mode alone.

[0117] Step P111: If so, the heat pump system enters the winter standby state.

[0118] Step P112: If the outlet water temperature of the water - fluorine radiator 41 is greater than the third set temperature TS3 + e, and the water temperature in the inner tank 12 is less than the fourth set temperature TS4 - d, then the heat pump system operates in the domestic hot water mode alone and determines whether the water temperature in the inner tank 12 is greater than the fourth set temperature TS4.

[0119] Step P113: If not, then the heat pump system continues to operate in the domestic hot water mode alone.

[0120] Step P114: If so, the heat pump system enters the winter standby state.

[0121] The above control steps can be understood as: when the outlet water temperature of the water - fluorine radiator 41 is less than the third set temperature TS3 + e (or less than TS3), the water system terminal 60 switches to the heating mode; when the water temperature in the inner tank 12 is less than the fourth set temperature TS4 - d (or less than TS4), the domestic water in the inner tank 12 is heated to keep the water temperature of the domestic water in the inner tank 12 above the base water temperature (the fourth set temperature TS4).

[0122] In the description of the present application, the descriptions with reference to the terms "in one embodiment", "in some embodiments", "in other embodiments", "in still other embodiments", or "exemplary", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In the present application, the schematic expressions of the above terms are not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art may combine the different embodiments or examples described in the present application and the features of the different embodiments or examples.

[0123] The foregoing is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application are included within the protection scope of the present application.

Claims

1. A heat pump system, characterized in that, Comprising: A water tank assembly, said water tank assembly including an inner tank and a water tank heat exchanger for heat exchange with said inner tank; A heat pump circulation loop, said heat pump circulation loop including a refrigerant circulation pipeline, an air source heat exchanger, a water and ground source heat exchange assembly and a hydraulic module, said hydraulic module including a water and fluorine heat exchanger; said air source heat exchanger, said water and ground source heat exchange assembly, said water and fluorine heat exchanger and said water tank heat exchanger are all arranged on said refrigerant circulation pipeline, and the refrigerant flowing through said water tank heat exchanger along said refrigerant circulation pipeline passes through at least said air source heat exchanger and said water and ground source heat exchange assembly.

2. The heat pump system according to claim 1, characterized in that, Said air source heat exchanger and said water and ground source heat exchange assembly are connected in series.

3. The heat pump system according to claim 1 or 2, characterized in that, Said refrigerant circulation pipeline has a refrigerant circulation channel, said water and ground source heat exchange assembly including a water and ground source pipeline, a water and ground source heat exchange pipe having a heat exchange channel and a water and ground source heat exchanger having a first refrigerant channel and a first water flow channel, said water and ground source heat exchanger being arranged on said refrigerant circulation pipeline, said first refrigerant channel being communicated with said refrigerant circulation channel, said water and ground source heat exchange pipe being arranged on said water and ground source pipeline, and said heat exchange channel being communicated with said first water flow channel through said water and ground source pipeline.

4. The heat pump system according to claim 3, characterized in that, Said water and ground source heat exchange assembly further includes a first water pump, said first water pump being arranged on said water and ground source pipeline; and / or, Said water and ground source heat exchange assembly further includes a stop valve, said stop valve being arranged on said water and ground source pipeline.

5. The heat pump system according to claim 1 or 2, characterized in that, Said heat pump circulation loop includes a compressor and a four-way valve arranged on said refrigerant circulation pipeline, and the refrigerant flowing along said refrigerant circulation pipeline circulates between said compressor, said four-way valve, said water and fluorine heat exchanger, said water and ground source heat exchange assembly and said air source heat exchanger, said water tank heat exchanger being arranged between said compressor and said four-way valve.

6. The heat pump system according to claim 5, characterized in that, Said air source heat exchanger, said water and ground source heat exchange assembly and said water and fluorine heat exchanger are connected in series in sequence, said four-way valve having a first valve port, a second valve port, a third valve port and a fourth valve port, the refrigerant outlet of said water tank heat exchanger being communicated with said first valve port, said second valve port being communicated with the refrigerant inlet of said water tank heat exchanger through said compressor, said third valve port being communicated with said water and fluorine heat exchanger, said fourth valve port being communicated with said air source heat exchanger, and said four-way valve is switched to make said first valve port communicate with said third valve port, said fourth valve port communicate with said second valve port, or to make said first valve port communicate with said fourth valve port, said third valve port communicate with said second valve port.

7. The heat pump system according to claim 1 or 2, characterized in that Said heat pump circulation loop includes a refrigerant heat dissipation device, said refrigerant heat dissipation device including a heat dissipation plate and refrigerant heat dissipation pipes arranged on said heat dissipation plate; said air source heat exchanger, said water and ground source heat exchange assembly, said water and fluorine heat exchanger and said refrigerant heat dissipation pipes are connected in series in sequence on said refrigerant circulation pipeline.

8. The heat pump system according to claim 7, wherein The opposite ends of said refrigerant heat dissipation pipes extend outside said heat dissipation plate, said heat pump system including a heat dissipation pipe temperature sensing member, said heat dissipation pipe temperature sensing member being arranged on said refrigerant heat dissipation pipes and located between said water and ground source heat exchange assembly and said heat dissipation plate.

9. The heat pump system according to claim 1 or 2, characterized in that, The refrigerant circulation pipeline has a refrigerant circulation passage, the water tank heat exchanger has a second refrigerant passage and a second water flow passage, the water tank assembly further includes a water tank pipeline and a second water pump, the second refrigerant passage communicates with the refrigerant circulation passage, the second water flow passage communicates with the inner tank through the water tank pipeline, and the second water pump is arranged on the water tank pipeline.

10. The heat pump system according to claim 1 or 2, characterized in that, The heat pump system includes a water system terminal, and the water system terminal exchanges heat with the water-fluorine heat exchanger.

11. The heat pump system according to claim 10, characterized in that, The water system terminal is an air conditioner indoor unit or a floor heating system.

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