Energy-saving system for efficiently improving water temperature output by water source heat pump

Abstract

The utility model relates to water source heat pump system, concretely relates to a kind of energy-saving system of high efficiency improves water source heat pump output water temperature. High efficiency improves water source heat pump output water temperature energy-saving system includes: oily sewage import, oily sewage outlet, oily sewage circulating pump, heating circulating pump, oily sewage heating water tank, evaporator, refrigeration compressor, condenser, expansion valve and condenser output circulating pump;The utility model principle is not only suitable for oilfield oily sewage source heat pump system, also is equally suitable for any water source heat pump system, improves the water temperature of water source heat pump unit. The utility model utilizes lever effect, can use 1 / 5 power consumption to improve the water temperature of water source heat pump unit. The utility model utilizes cheap valley electricity energy storage, improves the water temperature of water source heat pump unit.

Description

Technical Field

[0001] This utility model relates to a water source heat pump system, specifically to an energy-saving system that efficiently increases the output water temperature of a water source heat pump. Background Technology

[0002] Oilfield extraction operations generate large amounts of oily wastewater at around 30°C. Oilfield heating processes require hot water at 70-90°C. If this oily wastewater (around 30°C) is used as the heat source for a water-source heat pump, the unit can only output hot water at ≤60°C. To output hot water at ≥60°C, the temperature of the oily wastewater must be increased from around 30°C, ensuring it enters the heat pump unit at ≥30°C. Furthermore, the output temperature of the hot water from the heat pump is directly proportional to the temperature of the oily wastewater; the higher the temperature of the oily wastewater, the higher the output temperature of the heat pump unit.

[0003] Existing technologies offer various methods to increase the output water temperature of water source heat pumps, primarily involving heating oily wastewater electrically or by gas, or employing a dual-compressor cascade refrigeration cycle system. However, electric heating is energy-intensive, while gas heating is cheaper, but its high carbon emissions contradict the energy-saving and environmentally friendly principles of water source heat pumps. Although a dual-compressor cascade refrigeration cycle system can increase the output water temperature, the power consumption is doubled due to the operation of two systems, and the cost is high. Therefore, while the output water temperature is increased, the dual-compressor cascade refrigeration cycle system has a low energy efficiency ratio, limiting its practical application. Utility Model Content

[0004] The primary objective of this invention is to provide an energy-saving system that efficiently increases the output water temperature of a water source heat pump. This system can increase the output water temperature of the water source heat pump by leveraging the principle of increasing the water source temperature, thereby achieving a high-efficiency, high-temperature water source heat pump hot water system.

[0005] This utility model provides an energy-saving system for efficiently increasing the output water temperature of a water source heat pump, which includes: an oily wastewater inlet 1, an oily wastewater outlet 2, an oily wastewater circulation pump 3, a heating circulation pump 5, an oily wastewater heating tank 6, an evaporator 7, a refrigeration compressor 8, a condenser 9, an expansion valve 10, and a condenser output circulation pump 11.

[0006] One end of the oily wastewater heating tank 6 is connected to the oily wastewater source through the oily wastewater inlet 1, and the other end of the oily wastewater heating tank 6 is connected to one end of the water side of the evaporator 7. The other end of the water side of the evaporator 7 is connected to one end of the oily wastewater circulation pump 3, and the other end of the oily wastewater circulation pump 3 is connected to the oily wastewater source through the oily wastewater outlet 2.

[0007] One end of the oily wastewater heating tank 6 is connected to one end of the water side of the condenser 9 and the heat pump output interface 13 via the heating circulation pump 5. The other end of the oily wastewater heating tank 6 is connected to the other end of the water side of the condenser 9 and one end of the condenser output circulation pump 11. The other end of the condenser output circulation pump 11 is connected to the heat pump input interface 12.

[0008] One end of the evaporator 7 on the refrigerant side is connected to the suction end of the refrigeration compressor 8, and the other end of the evaporator 7 on the refrigerant side is connected to one end of the condenser 9 on the refrigerant side through the expansion valve 10. The other end of the condenser 9 on the refrigerant side is connected to the discharge end of the refrigeration compressor 8.

[0009] Preferably, the oily wastewater heating tank 6 is replaced with an oily wastewater heating heat exchanger 44;

[0010] One end of the primary side of the oily wastewater heating heat exchanger 44 is connected to one end of the water side of the condenser 9 and one end of the condenser output circulation pump 11. The other end of the primary side of the oily wastewater heating heat exchanger 44 is connected to the other end of the water side of the condenser 9 and the heat pump output interface 13 through the heating circulation pump 5.

[0011] One end of the secondary side of the oily wastewater heating heat exchanger 44 is connected to the oily wastewater inlet 1, and the other end of the secondary side of the oily wastewater heating heat exchanger 44 is connected to one end of the water side of the evaporator 7.

[0012] Preferably, it also includes: a heat pump output circulation pressure stabilizing tank 14;

[0013] One end of the heat pump output circulating pressure stabilizing tank 14 is connected to one end of the oily wastewater heating water tank 6 via the heating circulating pump 5, the other end of the heat pump output circulating pressure stabilizing tank 14 is connected to one end of the water side of the condenser 9, and another end of the heat pump output circulating pressure stabilizing tank 14 is connected to the heat pump output interface 13.

[0014] The oily wastewater heating tank 6 is also connected at one end to the condenser output circulation pump 11 and the heat pump input interface 12.

[0015] Preferably, it includes: an oily wastewater inlet 1, an oily wastewater outlet 2, a heating circulation pump 5, an oily wastewater heating tank 6, an oily wastewater circulation pump 19, a refrigeration compressor 15, an evaporator 16, a condenser 17, and an expansion valve 18;

[0016] One end of the evaporator 16 on the water side is connected to the oily wastewater inlet 1, and the other end of the evaporator 16 on the water side is connected to the oily wastewater outlet 2 via the oily wastewater circulation pump 19. One end of the evaporator 16 on the refrigerant side is connected to the suction end of the refrigeration compressor 15, and the other end of the evaporator 16 on the refrigerant side is connected to one end of the condenser 17 on the refrigerant side via the expansion valve 18. The other end of the condenser 17 on the refrigerant side is connected to the discharge end of the refrigeration compressor 15. One end of the condenser 17 on the water side is connected to the oily wastewater heating tank 6, and the other end of the condenser 17 on the water side is connected to the oily wastewater heating tank 6 via the heating circulation pump 5. The oily wastewater heating tank 6 is connected to the oily wastewater inlet 1.

[0017] Preferably, it also includes: molten salt storage tank 21, molten salt 22, electric heating device 24 and heat exchanger 28;

[0018] The molten salt 22 is disposed in the molten salt storage tank 21, and the electric heating device 24 is disposed in the molten salt storage tank 21 and immersed in the molten salt 22. The electric heating device 24 is connected to the power supply 25.

[0019] The heat exchanger 28 is disposed in the molten salt storage tank 21 and is immersed in the molten salt 22. One end of the heat exchanger 28 is connected to one end of the oily wastewater heating tank 6, and the other end of the heat exchanger 28 is connected to the other end of the oily wastewater heating tank 6 through the heating circulation pump 5.

[0020] Preferably, it includes: molten salt storage tank 21, molten salt 22, molten salt heat exchange output device 35, electromagnetic induction coil 38 and electromagnetic induction high-frequency current generator 42;

[0021] The electromagnetic induction coil 38 is wound on the heat insulation layer 39. One end of the electromagnetic induction coil 38 is connected to the output terminal of the electromagnetic induction high-frequency current generator 42 through the terminal 40, and the other end of the electromagnetic induction coil 38 is connected to the output terminal of the electromagnetic induction high-frequency current generator 42 through the terminal 41. The electromagnetic induction high-frequency current generator 42 is connected to the power supply 43.

[0022] The molten salt heat exchange output device 35 is disposed in the molten salt storage tank 21 and immersed in the molten salt 22. One end of the molten salt heat exchange output device 35 is connected to one end of the oily wastewater heating tank 6, and the other end of the molten salt heat exchange output device 35 is connected to the other end of the oily wastewater heating tank 6 through the heating circulation pump 5.

[0023] Beneficial effects:

[0024] 1. The principle of this utility model is not only suitable for oilfield oily wastewater source heat pump systems, but also applicable to any water source heat pump system, thereby increasing the outlet water temperature of the water source heat pump unit.

[0025] 2. This utility model utilizes the leverage effect to increase the outlet water temperature of the water source heat pump unit with 1 / 5 of the power consumption.

[0026] 3. This utility model utilizes inexpensive off-peak electricity for energy storage to increase the outlet water temperature of the water source heat pump unit. Attached Figure Description

[0027] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0028] Appendix Figure 1 A schematic diagram of an embodiment of this utility model that utilizes a water source heat pump to output high-temperature hot water to heat the input water source.

[0029] Appendix Figure 2 A schematic diagram of an embodiment of the present invention in which a water source heating heat exchanger is configured at the water source input end of a water source heat pump.

[0030] Appendix Figure 3 A schematic diagram of an embodiment of this utility model that utilizes an output hot water tank to stably heat the input water source.

[0031] Appendix Figure 4 A schematic diagram of an embodiment of this utility model that utilizes a water source heat pump to heat the input water source.

[0032] Appendix Figure 5 A schematic diagram of an embodiment of this utility model that utilizes electric heating molten salt energy storage to heat the input water source temperature.

[0033] Appendix Figure 6 A schematic diagram of an embodiment of this utility model that utilizes electromagnetic induction heating to heat molten salt energy storage and input water source temperature.

[0034] Appendix Figure 7 A schematic diagram of an embodiment of this utility model in which a heating pump independently heats a water source.

[0035] Explanation of reference numerals in the attached figures:

[0036] 1. Oily wastewater inlet, 2. Oily wastewater outlet, 3. Oily wastewater circulation pump, 4. Bypass valve, 5. Heating circulation pump, 6. Oily wastewater heating tank, 7. Evaporator, 8. Refrigeration compressor, 9. Condenser, 10. Expansion valve, 11. Condenser output circulation pump, 12. Heat pump input interface, 13. Heat pump output interface, 14. Heat pump output circulation pressure stabilizing tank, 15. Refrigeration compressor, 16. Evaporator, 17. Condenser, 18. Expansion valve, 19. Oily wastewater circulation pump, 20. Bypass valve, 2 1. Molten salt storage tank; 22. Molten salt; 23. Insulation material; 24. Electric heating device; 25. Power supply; 26. Heat exchanger interface; 27. Heat exchanger interface; 28. Heat exchanger; 29. ​​Expansion tank; 30. Water; 31. Gas-water mixer; 32. Float valve; 33. Valve; 34. Tap water interface; 35. Molten salt heat exchange output device; 38. Electromagnetic induction coil; 39. High-temperature insulation layer; 42. Electromagnetic induction high-frequency current generator; 43. Power supply; 44. Oily wastewater heating heat exchanger. Detailed Implementation

[0037] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0038] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0039] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0040] Appendix Figure 1 This is a schematic diagram illustrating an embodiment of the present invention that utilizes a water source heat pump to output high-temperature hot water to heat the input water source. (Attached) Figure 1 In this process, the high-temperature hot water output from the water source heat pump is used to heat the input water source temperature, including the water source input system and the water source water input system of the water source heat pump unit.

[0041] The water input system consists of an oily wastewater inlet 1, an oily wastewater outlet 2, an oily wastewater circulation pump 3, and a bypass valve 4.

[0042] Appendix Figure 1 In this system, the heating circulation pump 5 and the oily wastewater heating tank 6 constitute a system for heating the source water to increase its input temperature. When the oily wastewater circulation pump 3 is running, the bypass valve 4 is closed. When the oily wastewater circulation pump 3 is not needed, and its operation is stopped, the bypass valve 4 is opened to allow direct flow, thus forming the source water input system for the water source heat pump unit.

[0043] Appendix Figure 1 In this system, the evaporator 7, refrigeration compressor 8, condenser 9, and expansion valve 10 constitute a water source heat pump unit. The condenser output circulation pump 11, heat pump input interface 12, and heat pump output interface 13 constitute a water source heat pump output hot water system.

[0044] Appendix Figure 1This is an example of using the hot water output from a water source heat pump to heat the input water of the water source heat pump. Using a water source heat pump unit as a system to improve the water source heating, its energy efficiency ratio (COP) is at least 4. The heated output hot water is heated by a heating circulation pump 5, which circulates the source water through an oily wastewater heating tank 6. The heated source water, after being heated, is then input to the water side of the evaporator 7 via the oily wastewater heating tank 6. This water temperature is higher than the temperature of the source water that previously flowed through the oily wastewater inlet 1 and outlet 2. According to the heating principle of a water source heat pump, as the input source water temperature increases, the output hot water from the water source heat pump will increase proportionally to the increased temperature. If a variable frequency control system is configured for the heating circulation pump 5, the circulation flow rate of the heating circulation pump 5 can be automatically adjusted according to the set output water temperature, thus automatically adjusting the temperature of the input water source. Ultimately, the water source heat pump outputs hot water at the set temperature with high efficiency.

[0045] Appendix Figure 1 It requires less investment and has high efficiency, but it is necessary to increase the output water temperature according to the heating and increase the capacity of the water source heat pump unit accordingly. Otherwise, the design capacity of the water source heat pump will be affected. The heating capacity of the water source heat pump unit should be comprehensively considered during the design.

[0046] Appendix Figure 1 This invention is not only suitable for oilfield wastewater source heat pump systems, but its structure is also adaptable to water source heat pump systems with any water source. Since this invention is not specifically about the principle of water source heat pumps, the working principle of water source heat pumps will not be described in detail.

[0047] Appendix Figure 2 A schematic diagram of an embodiment of this utility model in which a water source heating heat exchanger is configured at the water source input end of a water source heat pump. (Attached) Figure 2 It is attached Figure 1 Based on the existing design, the oily wastewater heating tank 6 is replaced with an oily wastewater heating heat exchanger 44, which heats the source water. During operation, the high-temperature hot water from the water side of the condenser 17 is circulated through the heating circulation pump 5 to the primary side of the oily wastewater heating heat exchanger 44, heating the source water flowing through the secondary side of the heat exchanger 44 and increasing its temperature. Other details are as follows. Figure 1 Same. The oily wastewater heating heat exchanger 44 can be any type of water / water heat exchanger.

[0048] Appendix Figure 3 This utility model utilizes an output hot water tank to stably heat the input water source, as illustrated in the following schematic diagram. Figure 3 It is attached Figure 1Alternatively, based on option 2, a heat pump output circulation pressure stabilizing tank 14 is configured. Its function is to buffer and stabilize the overall operation of the water source heat pump unit when the heating circulation pump 5 is running and the output hot water from the water source heat pump unit cannot immediately establish a high-temperature water output, thus affecting the overall operational stability. The heat pump output circulation pressure stabilizing tank 14 is configured to strive for system stability. Other related to the appendix... Figure 1 The same applies, so I will not repeat it.

[0049] Appendix Figure 4 A schematic diagram illustrating an embodiment of this utility model utilizing a water source heat pump to heat the input water source. (Attached) Figure 4 It is attached Figure 1 Alternatively, based on option 2, a small water source heat pump unit can be configured. This unit heats the input water in the oily wastewater heating tank 6 by heating the high-temperature hot water from the circulating pump 5 and condenser 17. Other details are attached. Figure 1 Same.

[0050] Appendix Figure 5 A schematic diagram of an embodiment of this utility model for heating input water source temperature using electric heating molten salt energy storage. (Attached) Figure 5 It is attached Figure 1 Alternatively, based on option 2, a molten salt storage tank 21, molten salt 22, an electric heating device 24, and a heat exchanger 28 can be configured to form a molten salt energy storage heating system for off-peak electricity heating.

[0051] Appendix Figure 5 In the process, molten salt 22 is heated by electric heating device 24, changing from a solid phase to a high-temperature liquid molten salt 22. A large amount of electrical energy is converted into heat and stored in the molten salt 22 inside the molten salt storage tank 21. The source water in the oily wastewater heating tank 6 is circulated by heat exchanger 28 and heating circulation pump 5. When the source water flows through heat exchanger 28, it is heated to the required temperature by the high-temperature liquid molten salt 22. Other details are attached. Figure 1 Or 2 is the same.

[0052] Appendix Figure 5 In this system, the expansion tank 29, water 30, air-water mixer 31, float valve 32, valve 33, and tap water interface 34 constitute the expansion tank system, which mainly serves the purpose of automatic air release and water replenishment. It is the same as the existing conventional expansion tank system and will not be described further.

[0053] Appendix Figure 6 This utility model utilizes electromagnetic induction heating of molten salt for energy storage and heating of the input water source temperature, as illustrated in the following schematic diagram. Figure 6 It is attached Figure 1 Alternatively, based on option 2, an electromagnetic induction heating system may be configured consisting of a molten salt storage tank 21, molten salt 22, a molten salt heat exchange output device 35, an electromagnetic induction coil 38, a high-temperature insulation material 39, an electromagnetic induction high-frequency current generator 42, and a power supply 43.

[0054] Appendix Figure 6In this process, the electromagnetic induction high-frequency current generator 42 rectifies the AC power input from the power supply 43 into DC power, which is then oscillated by an electronic high-frequency oscillator to generate a high-frequency alternating current. This current is input to the electromagnetic induction coil 38 via terminal 40, generating a high-frequency electromagnetic field. The field is then output back to the electromagnetic induction high-frequency current generator 42 via terminal 41, forming an electromagnetic induction high-frequency heating current loop. Since the electromagnetic induction coil 38 is wound around the high-temperature insulation material 39 outside the molten salt storage tank 21, the magnetic lines of force generated by the electromagnetic field induce eddy currents within the metal material tank of the molten salt storage tank 21. Due to the resistance within the metal material tank, these eddy currents generate high-temperature heat within the metal material tank. This heat directly heats the molten salt 22 through the metal material tank of the molten salt storage tank 21. The high-temperature liquid molten salt 22 heats the molten salt heat exchange output device 35 and circulates the oily wastewater heating water in the water tank 6 via the heating circulation pump 5, thereby achieving the purpose of heating and improving the water quality of the source water. Electromagnetic induction heating is fast and efficient. Its biggest advantage is that the electromagnetic induction coil does not contact the molten salt; instead, it heats the molten salt 22 outside the metal tank 21, thus resulting in a long service life. Other details are attached. Figure 5 same.

[0055] Appendix Figure 7 This utility model provides a schematic diagram of an embodiment where a heating pump independently heats a water source. (Attached) Figure 7 In the appendix Figure 1 Based on this, one circulation pipeline is omitted, and the water source heating operation is completed independently by heating circulation pump 5. Other details are attached. Figure 1 Exactly the same.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A highly efficient energy-saving system for increasing the output water temperature of a water source heat pump, characterized in that, include: Oily wastewater inlet (1), oily wastewater outlet (2), oily wastewater circulation pump, heating circulation pump (5), oily wastewater heating water tank (6), evaporator, refrigeration compressor, condenser, expansion valve and condenser output circulation pump (11). One end of the oily wastewater heating tank (6) is connected to the oily wastewater source through the oily wastewater inlet (1), and the other end of the oily wastewater heating tank (6) is connected to one end of the water side of the evaporator. The other end of the water side of the evaporator is connected to one end of the oily wastewater circulation pump, and the other end of the oily wastewater circulation pump is connected to the oily wastewater source through the oily wastewater outlet (2). The oily wastewater heating tank (6) is connected at one end to the water side of the condenser and the heat pump output interface (13) via the heating circulation pump (5). The oily wastewater heating tank (6) is also connected at the other end of the water side of the condenser and one end of the condenser output circulation pump (11). The other end of the condenser output circulation pump (11) is connected to the heat pump input interface (12). One end of the evaporator refrigerant side is connected to the suction end of the refrigeration compressor, the other end of the evaporator refrigerant side is connected to one end of the condenser refrigerant side through the expansion valve, and the other end of the condenser refrigerant side is connected to the discharge end of the refrigeration compressor.

2. The energy-saving system for efficiently increasing the output water temperature of a water source heat pump according to claim 1, characterized in that, Replace the oily wastewater heating tank (6) with an oily wastewater heating heat exchanger (44); One end of the primary side of the oily wastewater heating heat exchanger (44) is connected to one end of the condenser water side and one end of the condenser output circulation pump (11), and the other end of the primary side of the oily wastewater heating heat exchanger (44) is connected to the other end of the condenser water side and the heat pump output interface (13) through the heating circulation pump (5). One end of the secondary side of the oily wastewater heating heat exchanger (44) is connected to the oily wastewater inlet (1), and the other end of the secondary side of the oily wastewater heating heat exchanger (44) is connected to one end of the water side of the evaporator.

3. The energy-saving system for efficiently increasing the output water temperature of a water source heat pump according to claim 1, characterized in that, Also includes: Heat pump output circulation pressure regulator (14); One end of the heat pump output circulation pressure stabilizing tank (14) is connected to one end of the oily wastewater heating water tank (6) through the heating circulation pump (5), and the other end of the heat pump output circulation pressure stabilizing tank (14) is connected to one end of the condenser water side. The other end of the heat pump output circulation pressure stabilizing tank (14) is also connected to the heat pump output interface (13). The oily wastewater heating tank (6) is also connected at one end to the condenser output circulation pump (11) and the heat pump input interface (12).

4. The energy-saving system for efficiently increasing the output water temperature of a water source heat pump according to claim 1 or 2, characterized in that, include: Oily wastewater inlet (1), oily wastewater outlet (2), heating circulation pump (5), oily wastewater heating tank (6), oily wastewater circulation pump, refrigeration compressor, evaporator, condenser and expansion valve; One end of the evaporator water side is connected to the oily wastewater inlet (1), and the other end of the evaporator water side is connected to the oily wastewater outlet (2) through the oily wastewater circulation pump. One end of the evaporator refrigerant side is connected to the suction end of the refrigeration compressor. The other end of the evaporator refrigerant side is connected to one end of the condenser refrigerant side through the expansion valve. The other end of the condenser refrigerant side is connected to the discharge end of the refrigeration compressor. One end of the condenser water side is connected to the oily wastewater heating tank (6), and the other end of the condenser water side is connected to the oily wastewater heating tank (6) through the heating circulation pump (5). The oily wastewater heating tank (6) is connected to the oily wastewater inlet (1).

5. The energy-saving system for efficiently increasing the output water temperature of a water source heat pump according to claim 4, characterized in that, Also includes: Molten salt storage tank (21), molten salt (22), electric heating device (24) and heat exchanger (28); The molten salt (22) is disposed in the molten salt storage tank (21), the electric heating device (24) is disposed in the molten salt storage tank (21) and immersed in the molten salt (22), and the electric heating device (24) is connected to a power source; The heat exchanger (28) is disposed in the molten salt storage tank (21) and is immersed in the molten salt (22). One end of the heat exchanger (28) is connected to one end of the oily wastewater heating tank (6), and the other end of the heat exchanger (28) is connected to the other end of the oily wastewater heating tank (6) through the heating circulation pump (5).

6. The energy-saving system for efficiently increasing the output water temperature of a water source heat pump according to claim 5, characterized in that, include: Molten salt storage tank (21), molten salt (22), molten salt heat exchange output device (35), electromagnetic induction coil (38) and electromagnetic induction high-frequency current generator (42). The electromagnetic induction coil (38) is wound on the heat insulation layer (39). One end of the electromagnetic induction coil (38) is connected to the output end of the electromagnetic induction high-frequency current generator (42) through a terminal block. The other end of the electromagnetic induction coil (38) is connected to the output end of the electromagnetic induction high-frequency current generator (42) through a terminal block. The electromagnetic induction high-frequency current generator (42) is connected to a power supply. The molten salt heat exchange output device (35) is disposed in the molten salt storage tank (21) and immersed in the molten salt (22). One end of the output of the molten salt heat exchange output device (35) is connected to one end of the oily wastewater heating tank (6), and the other end of the output of the molten salt heat exchange output device (35) is connected to the other end of the oily wastewater heating tank (6) through the heating circulation pump (5).

7. The energy-saving system for efficiently increasing the output water temperature of a water source heat pump according to claim 1, characterized in that, include: Heating circulation pump (5); One end of the heating circulation pump (5) is connected to one end of the oily wastewater heating tank (6), and the other end of the heating circulation pump (5) is connected to one end of the condenser water side and the heat pump output interface (13).

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