Dual-source heat pump hot water system and control method

Abstract

The present application discloses a dual-source heat pump hot water system and control method, and relates to the technical field of heat pump systems, wherein the dual-source heat pump hot water system comprises a heat pump unit, a hot water circulation component, a wastewater heat exchange component, a pipeline connection component and a water washing component; the hot water circulation component comprises a hot water tank, a first pipeline and a second pipeline; the wastewater heat exchange component comprises a wastewater heat exchanger, the wastewater heat exchange flow channel is used to pass wastewater, and the new water heat exchange flow channel is provided with a fourth inlet and a fourth outlet; the pipeline connection component comprises a third pipeline, a fifth pipeline and a new water input pipe, and the fourth outlet is provided with a water supply pipeline connected to the first pipeline; the water washing component comprises an eighth pipeline and a ninth pipeline. In the present application, in the process of utilizing the heat of wastewater, the wastewater does not need to enter the heat pump unit for heat exchange, which can avoid blockage or corrosion of the heat pump unit; the wastewater heat exchanger through which the wastewater flows can also be washed with water, thereby increasing the service life of the wastewater heat exchanger.

Description

Technical Field

[0001] The present application relates to the technical field of heat pump systems, and in particular to a dual-source heat pump hot water system, and also to a control method for a dual-source heat pump hot water system. Background Art

[0002] Many years ago, the water source heat pump system that was common in the market was Figure 1 As shown in the figure, the heat source water enters the heat pump unit through the condenser heat exchange flow channel. After the heat source water extracts heat from the heat pump unit, the cold water flows into the sewer or is recharged into the well. The advantage of this structural method is that the groundwater heat source is stable. However, there are also many disadvantages, such as wasting precious groundwater resources; increasing the recharge pressure of cold water; the recharged cold water easily breaks the thermal balance of groundwater, easily causing pollution and affecting the groundwater ecology; the circulating water volume is large and the comprehensive energy efficiency is low.

[0003] In recent years, wastewater waste heat has been used to heat pump units to form wastewater source heat pump systems. Common wastewater source heat pump systems on the market include: Figure 2 As shown, usually the wastewater is first heat exchanged with the new water, and then enters the evaporator of the heat pump unit to further release heat before being discharged; at the same time, the new water that has been heated by the wastewater enters the condenser of the heat pump system to further heat up, and enters the hot water tank for heating. The wastewater source heat pump system is simple and has high initial operating efficiency. However, the wastewater entering the evaporator of the heat pump unit will quickly cause dirt, blockage and corrosion, thereby greatly reducing the heat exchange efficiency. Dirt, blockage and oil are not easy to clean and are easy to corrode and damage the evaporator.

[0004] While utilizing the waste heat from wastewater, how to prevent wastewater from damaging the heat pump unit has become a technical problem that needs to be solved urgently. Summary of the invention

[0005] The present application aims to solve at least one of the above-mentioned technical problems in the prior art to a certain extent. To this end, the present application provides a dual-source heat pump hot water system, in which, in the process of utilizing the heat of wastewater, wastewater does not need to enter the heat pump unit for heat exchange, which can avoid blockage or corrosion of the heat pump unit, and the wastewater heat exchanger through which the wastewater flows can also be washed with water, thereby increasing the service life of the wastewater heat exchanger.

[0006] The embodiment of the present application also provides a control method for a dual-source heat pump hot water system.

[0007] According to an embodiment of the first aspect of the present application, a dual-source heat pump hot water system is provided, including a heat pump unit, the heat pump unit including a compressor, a condenser, a throttling element and an evaporator forming a refrigerant cycle, the condenser having a condenser heat exchange flow channel, the evaporator having an evaporator heat exchange flow channel, the condenser heat exchange flow channel is provided with a first inlet and a first outlet, the evaporator heat exchange flow channel is provided with a second inlet and a second outlet; a hot water circulation component, the hot water circulation component including a hot water tank, a first pipeline and a second pipeline, the hot water tank is provided with a circulation water inlet and a circulation water outlet, the two ends of the first pipeline are respectively connected to the The circulating water outlet and the first inlet, the two ends of the second pipeline are respectively connected to the first outlet and the circulating water inlet, the first pipeline or the second pipeline is provided with a first pump to transport the heating water in the hot water tank from the first pipeline to the condenser heat exchange flow channel of the condenser for heating, and then return it to the hot water tank from the second pipeline; a wastewater heat exchange component, the wastewater heat exchange component includes a wastewater heat exchanger, the wastewater heat exchanger has a wastewater heat exchange flow channel and a new water heat exchange flow channel for heat exchange with each other, the wastewater heat exchange flow channel is used to pass wastewater, and the wastewater heat exchange flow channel is provided with a third inlet and a third outlet, The new water heat exchange flow channel is provided with a fourth inlet and a fourth outlet; a pipeline connection assembly, the pipeline connection assembly includes a third pipeline, a fifth pipeline and a new water input pipe, one end of the new water input pipe is a new water flow inlet, the other end of the new water input pipe is connected to the second inlet, the new water input pipe is provided with a first valve to control the opening and closing of the new water input pipe, the two ends of the third pipeline are respectively connected to the second outlet and the fourth inlet, the fourth outlet is provided with a water replenishment pipeline connected to the first pipeline, the water replenishment pipeline is provided with a second valve to control the opening and closing of the water replenishment pipeline, one end of the fifth pipeline is connected to the second outlet and the fourth inlet, and the second end of the fifth pipeline is connected to the second outlet. an eighth pipeline and a ninth pipeline, one end of the eighth pipeline is connected to the new water inlet, the other end of the eighth pipeline is connected to the third outlet, the eighth pipeline is provided with a fifth valve to control the opening and closing of the eighth pipeline, one end of the ninth pipeline is connected to the third inlet, the other end of the ninth pipeline is a flushing outlet, and the ninth pipeline is provided with a sixth valve to control the opening and closing of the ninth pipeline.

[0008] The above dual-source heat pump hot water system has at least the following beneficial effects: the above technical solution, through the hot water circulation component, the wastewater heat exchange component and the new water pipeline component, through the connection design of each pipeline and the opening and closing control of each valve, has at least a wastewater waste heat utilization water replenishment heating mode and a water source heat pump heating mode, which improves the adaptability and application scope. Among them, in the wastewater waste heat utilization water replenishment heating mode, when the hot water tank needs to be replenished with water, the heat pump component increases the temperature difference to enhance the heat exchange effect, so that the new water fully absorbs the heat of the wastewater and then replenishes it to the hot water tank; in the water source heat pump heating mode, when the wastewater is insufficient, the heat pump component uses the new water as a heat source to heat the circulating hot water, so that the temperature in the hot water tank gradually rises. In the dual-source heat pump hot water system of the present application, during the process of utilizing the waste heat of wastewater, the wastewater does not need to enter the heat pump unit for heat exchange, which can avoid blockage or corrosion of the heat pump unit. In addition, the wastewater heat exchanger through which the wastewater flows can also be washed with water. New water flows from the eighth pipeline to the wastewater heat exchange flow channel of the wastewater heat exchanger, and then is discharged from the ninth pipeline. By flushing the wastewater heat exchanger, the service life of the wastewater heat exchanger can be increased.

[0009] According to an embodiment of the first aspect of the present application, the wastewater heat exchange component also includes a wastewater tank for holding wastewater, the wastewater tank is connected to the third inlet through a sixth pipeline, the sixth pipeline is provided with a second pump to introduce wastewater into the wastewater heat exchange flow channel, the third outlet is provided with a seventh pipeline connected thereto, the other end of the seventh pipeline is a wastewater discharge outlet, and the seventh pipeline is provided with a fourth valve to control the opening and closing of the wastewater discharge outlet.

[0010] According to an embodiment of the first aspect of the present application, the dual-source heat pump hot water system further includes a medicine washing component for performing medicine washing on the wastewater heat exchange flow channel, the medicine washing component includes a medicine water tank and a tenth pipeline, the medicine water tank is provided with a medicine water outlet and a medicine water return port, the two ends of the tenth pipeline are respectively connected to the medicine water outlet and the third outlet, and the tenth pipeline is provided with a fourth pump to transport the medicine water in the medicine water tank from the tenth pipeline to the wastewater heat exchange flow channel. Further, the medicine washing component also includes an eleventh pipeline, one end of the eleventh pipeline is connected to the ninth pipeline, thereby connecting to the third inlet, and the other end of the eleventh pipeline is connected to the medicine water return port, so that the medicine water can flow back from the wastewater heat exchange flow channel to the medicine water tank, and the eleventh pipeline is provided with a seventh valve to control the opening and closing of the eleventh pipeline. Further, the medicine water return port is provided with a twelfth pipeline connected to the eighth pipeline, so that new water can be replenished from the eighth pipeline and the second pipeline to the medicine water tank. Through this technical solution, the medicine in the medicine tank flows to the wastewater heat exchange channel through the tenth pipeline for medicine washing under the action of the fourth pump, and then is discharged from the ninth pipeline or flows back to the medicine tank from the eleventh pipeline.

[0011] According to the embodiment of the first aspect of the present application, the tenth pipeline is provided with a thirteenth pipeline connected with the second pipeline to connect with the first outlet, and the eleventh pipeline is provided with a fourteenth pipeline connected with the first pipeline to connect with the first inlet, so that the medicine in the medicine tank is transported from the tenth pipeline, the thirteenth pipeline and the second pipeline to the condenser heat exchange flow channel through the fourth pump, and then flows back to the medicine tank from the fourteenth pipeline and the eleventh pipeline, and the fourteenth pipeline is provided with a ninth valve to control the opening and closing of the fourteenth pipeline, and the bottom of the medicine tank is provided with a fifteenth pipeline for discharging medicine, and the fifteenth pipeline is provided with a tenth valve. Through this technical solution, the medicine in the medicine tank flows to the condenser heat exchange flow channel through the tenth pipeline, the thirteenth pipeline and the second pipeline under the action of the fourth pump, thereby descaling the condenser, and then flows back to the medicine tank from the second pipeline, the fourteenth pipeline and the eleventh pipeline.

[0012] According to the embodiment of the first aspect of the present application, the pipeline connection assembly also includes a fourth pipeline, the two ends of the fourth pipeline are respectively connected to the fourth outlet and the second inlet, and the fourth pipeline is provided with a third pump to transport the new water in the third pipeline to the new water heat exchange flow channel and then flow to the fourth pipeline. Through this technical solution, the embodiment of the first aspect of the present application can also realize the wastewater source heat pump hot water mode. Under the action of the third pump, the cold water circulates between the evaporator heat exchange flow channel, the third pipeline, the new water heat exchange flow channel, and the fourth pipeline. When the hot water in the hot water tank needs to be heated, the heat pump assembly uses the waste heat of the waste water, specifically, the waste heat of the waste water is absorbed by the waste water heat exchanger to heat the circulating cold water, the circulating cold water releases heat through the evaporator, and the condenser heats the circulating hot water with the absorbed heat, so that the temperature in the hot water tank can be continuously heated.

[0013] According to an embodiment of the second aspect of the present application, a control method for a dual-source heat pump hot water system is provided, and the dual-source heat pump hot water system described in the embodiment of the first aspect of the present application is controlled, and the dual-source heat pump hot water system is adjusted to a wastewater waste heat utilization water replenishment heating mode, and the wastewater waste heat utilization water replenishment heating mode includes a direct heating method and a circulation heating method, wherein the direct heating method of the wastewater waste heat utilization water replenishment heating mode is: new water flows from the new water inlet pipe to the evaporator heat exchange flow channel, and then flows to the new water heat exchange flow channel through the third pipeline, and then flows to the first pipeline through the water replenishment pipeline; the new water flowing into the water replenishment pipeline flows to the condenser heat exchange flow channel, and then flows through the second pipeline Flows back to the hot water tank; the waste water in the wastewater pool flows to the wastewater heat exchange channel through the sixth pipeline, and then is discharged through the seventh pipeline; the circulating heating method of the wastewater waste heat utilization water supply heating mode is: new water flows from the new water input pipe to the evaporator heat exchange channel, and then flows to the new water heat exchange channel through the third pipeline, and then flows to the first pipeline through the water supply pipeline; the heated water in the hot water tank flows out through the first pipeline, and flows to the condenser heat exchange channel together with the new water flowing into the water supply pipeline, and then flows back to the hot water tank through the second pipeline; the waste water in the wastewater pool flows to the wastewater heat exchange channel through the sixth pipeline, and then is discharged through the seventh pipeline.

[0014] According to an embodiment of the second aspect of the present application, a control method for a dual-source heat pump hot water system is provided, and the dual-source heat pump hot water system described in the embodiment of the first aspect of the present application is controlled to adjust the dual-source heat pump hot water system to a wastewater source heat pump hot water mode or a water source heat pump hot water mode, wherein the wastewater source heat pump hot water mode is: cold water circulates among the evaporator heat exchange flow channel, the third pipeline, the new water heat exchange flow channel, and the fourth pipeline under the action of the third pump; the heated water of the hot water tank flows to the condenser heat exchange flow channel through the first pipeline, and then flows back to the hot water tank through the second pipeline; the wastewater of the wastewater tank flows to the wastewater heat exchange flow channel through the sixth pipeline, and then is discharged through the seventh pipeline; the water source heat pump hot water mode is: new water flows from the new water input pipe to the evaporator heat exchange flow channel, and then is discharged through the third pipeline and the fifth pipeline; the heated water of the hot water tank flows to the condenser heat exchange flow channel through the first pipeline, and then flows back to the hot water tank through the second pipeline.

[0015] According to an embodiment of the second aspect of the present application, a control method for a dual-source heat pump hot water system is provided, and the dual-source heat pump hot water system described in the embodiment of the first aspect of the present application is controlled to adjust the dual-source heat pump hot water system to a wastewater heat exchanger water washing mode or a wastewater heat exchanger chemical washing mode or a condenser descaling mode, wherein the wastewater heat exchanger water washing mode is: new water flows from the eighth pipeline to the wastewater heat exchange channel and then is discharged from the ninth pipeline; the wastewater heat exchanger chemical washing mode is: the chemical water in the chemical water tank flows to the wastewater heat exchange channel through the tenth pipeline under the action of the fourth pump, and then is discharged from the ninth pipeline or flows back to the chemical water tank from the eleventh pipeline; the condenser descaling mode is: the chemical water in the chemical water tank flows to the condenser heat exchange channel through the tenth pipeline, the thirteenth pipeline and the second pipeline under the action of the fourth pump, and then flows back to the chemical water tank from the first pipeline, the fourteenth pipeline and the eleventh pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present application is further described below with reference to the accompanying drawings and embodiments;

[0017] Figure 1 It is a structural schematic diagram of the first prior art;

[0018] Figure 2 It is a structural schematic diagram of the second prior art;

[0019] Figure 3 is a schematic diagram of the structure of an embodiment of the present application, wherein a refrigeration component and a heating component are not shown;

[0020] Figure 4 It is a structural schematic diagram of the water replenishment heating mode of utilizing waste heat from wastewater in the embodiment of the present application, wherein the heating is direct heating;

[0021] Figure 5 It is a structural schematic diagram of the water replenishment heating mode of utilizing waste heat from wastewater in the embodiment of the present application, wherein the heating is cyclic heating;

[0022] Figure 6 It is a schematic diagram of the structure of the wastewater source heat pump hot water mode of the embodiment of the present application;

[0023] Figure 7 It is a schematic diagram of the structure of the water source heat pump hot water mode of the embodiment of the present application;

[0024] Figure 8 It is a structural schematic diagram of the water washing mode of the wastewater heat exchanger in the embodiment of the present application;

[0025] Fig. 9 It is a structural schematic diagram of the chemical washing mode of the wastewater heat exchanger in the embodiment of the present application;

[0026] Fig.10 It is a structural schematic diagram of the condenser descaling mode of an embodiment of the present application;

[0027] Fig.11 is a schematic structural diagram of an embodiment of the present application, wherein a refrigeration component and a heating component are shown;

[0028] Fig.12 This is a schematic diagram of the structure of the combined cooling and heating mode of the embodiment of the present application;

[0029] Fig.13 It is a structural schematic diagram of the wastewater source heat pump heating mode of the embodiment of the present application;

[0030] Fig.14 It is a structural schematic diagram of the water source heat pump heating mode of an embodiment of the present application.

[0031] Reference numerals: heat pump unit 110, 120, 310, compressor 111, 211, 311, condenser 112, 212, 312, throttling element 113, 213, 313, evaporator 114, 214, 314, circulation pump 122;

[0032] Hot water circulation component 320, hot water tanks 121, 221, 321, first pipeline 322, first pump 323, second pipeline 324;

[0033] Wastewater heat exchange assembly 330, wastewater tanks 231, 331, sixth pipeline 332, second pump 333, wastewater heat exchangers 232, 334, seventh pipeline 335, fourth valve member 336;

[0034] New water input pipe 341, first valve 342, third pipeline 343, fifth pipeline 344, third valve 345, fourth pipeline 346, third pump 347, water supply pipeline 348, second valve 349;

[0035] Water washing assembly 350, eighth pipeline 351, fifth valve 352, ninth pipeline 353, sixth valve 354;

[0036] A medicine washing assembly 360, a medicine water tank 361, a tenth pipeline 362, a fourth pump 363, an eleventh pipeline 364, a seventh valve 365, a fourteenth pipeline 366, a ninth valve 367, and a thirteenth pipeline 368;

[0037] Refrigeration assembly 370, first air conditioning heat exchanger 371, sixteenth pipeline 372, seventeenth pipeline 373, fifth pump 374, eleventh valve 375;

[0038] Heating assembly 380, second air conditioning heat exchanger 381, eighteenth pipeline 382, ​​nineteenth pipeline 383, sixth pump 384, twelfth valve 385;

[0039] The fifteenth pipeline 391 , the tenth valve component 392 , the twelfth pipeline 393 , and the eighth valve component 394 . DETAILED DESCRIPTION

[0040] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0041] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0042] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0043] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0044] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0045] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0046] In the prior art, such as Figure 1 The water source heat pump system shown, the heat pump unit 110 includes a compressor 111, a condenser 112, a throttling element 113 and an evaporator 114 that form a refrigerant cycle. The heat pump unit 110 can be used to heat new water. The main principle is to absorb the heat of the heat source water through the evaporator 114, and then heat the new water with the absorbed heat through the condenser 112. Specifically, the evaporator 114 has an evaporator heat exchange flow channel for the heat source water to flow through, the heat pump unit can absorb the heat of the heat source water, the condenser 112 has a condenser heat exchange flow channel for the new water to flow through, and can exchange heat with the new water to heat the new water. The hot water tank 121 is provided with a circulation pipeline, and the circulation pipeline is provided with a circulation pump 122 to flow the heated water into the condenser 112 for circulation heating. Among them, the heat source water enters the heat pump unit 110 through the condenser heat exchange flow channel. After the heat source water extracts heat from the heat pump unit 110, the cold water formed flows into the sewer or is recharged into the well. The advantage of this structural method is that the groundwater heat source is stable, but it also has many disadvantages, such as causing a waste of precious groundwater resources; increasing the reinjection pressure of cold water; the reinjected cold water can easily break the thermal balance of groundwater, easily causing pollution and affecting the groundwater ecology; the circulating water volume is large and the overall energy efficiency is low.

[0047] With the innovation of technology, in recent years, waste heat from wastewater has been used to apply it to heat pump units to form wastewater source heat pump systems. Figure 2The wastewater source heat pump system shown in the figure, similarly, the heat pump unit 210 includes a compressor 211, a condenser 212, a throttling element 213 and an evaporator 214 that form a refrigerant cycle. The specific principle of the wastewater source heat pump system is that the wastewater in the wastewater pool 231 first exchanges heat with new water in the wastewater heat exchanger 232, then enters the evaporator 214 of the heat pump unit 210 to further release heat, and finally is discharged; at the same time, the new water that has been heated by heat exchange with the wastewater enters the condenser 212 of the heat pump assembly 210 to further heat up, and then enters the hot water tank 221 for heating. The wastewater source heat pump system is simple and has high initial operating efficiency. However, the wastewater entering the evaporator 213 of the heat pump unit 210 will quickly cause dirt, blockage and corrosion, thereby greatly reducing the heat exchange efficiency. Dirt, blockage and oil are not easy to clean and are easy to corrode and damage the evaporator.

[0048] In the process of utilizing wastewater waste heat, it is difficult to avoid the dirt, blockage and corrosion of the heat pump unit caused by wastewater in the prior art. To this end, the present application provides a dual-source heat pump hot water system in which, in the process of utilizing wastewater heat, wastewater does not need to enter the heat pump unit for heat exchange, which can avoid blockage or corrosion of the heat pump unit, and the wastewater heat exchanger through which the wastewater flows can also be washed with water, thereby increasing the service life of the wastewater heat exchanger.

[0049] Refer to the following Figure 3 This embodiment describes a dual-source heat pump hot water system, including a heat pump unit 310, a hot water circulation component 320, a wastewater heat exchange component 330, a pipe connection component and a water washing component 350.

[0050] The heat pump unit 310 includes a compressor 311, a condenser 312, a throttling element 313, and an evaporator 314 for forming a refrigerant cycle. The condenser 312 has a condenser heat exchange flow channel, and water flows through the condenser heat exchange flow channel to exchange heat with the condenser, wherein the condenser heat exchange flow channel is provided with a first inlet and a first outlet; the evaporator 314 has an evaporator heat exchange flow channel, and water flows through the evaporator heat exchange flow channel to exchange heat with the evaporator, wherein the evaporator heat exchange flow channel is provided with a second inlet and a second outlet.

[0051] The hot water circulation component 320 includes a hot water tank 321, a first pipeline 322 and a second pipeline 324. The hot water tank 321 is provided with a circulating water inlet and a circulating water outlet. The two ends of the first pipeline 322 are respectively connected to the circulating water outlet and the first inlet. The two ends of the second pipeline 324 are respectively connected to the first outlet and the circulating water inlet. It can be understood that, in some embodiments, the hot water tank 321, the first pipeline 322, the condenser heat exchange flow channel and the second pipeline 324 form a circulating hot water loop, wherein the first pipeline 322 or the second pipeline 324 is provided with a first pump 323 to transport the heating water in the hot water tank 321 from the first pipeline 322 to the condenser heat exchange flow channel of the condenser 312 for heating, and then return to the hot water tank 321 from the second pipeline 324. In this embodiment, the heating water inside the hot water tank 321 is transported to the condenser heat exchange flow channel for heating through the first pump 323, and then returns to the heating water tank 321, so as to circulate and heat, wherein the first pump 323 is provided in the first pipeline 322. Of course, in some embodiments, the first pump 323 may not be started, and the water flow may be introduced into the first inlet through other pipelines, and then heated through the condenser, and then returned to the hot water tank 321 from the second pipeline 324.

[0052] The wastewater heat exchange assembly 330 includes a wastewater heat exchanger 334, which has a wastewater heat exchange flow channel and a new water heat exchange flow channel for heat exchange with each other. The wastewater heat exchange flow channel is used to pass wastewater. Specifically, the wastewater heat exchange flow channel is provided with a third inlet and a third outlet. The wastewater heat exchange assembly 330 also includes a wastewater pool 331 for holding wastewater. The wastewater pool 331 is connected to the third inlet through a sixth pipeline 332. The sixth pipeline 332 is provided with a second pump 333 to pass wastewater into the wastewater heat exchange flow channel. The third outlet is provided with a seventh pipeline 335 connected thereto. The other end of the seventh pipeline is a wastewater discharge outlet. The seventh pipeline 335 is provided with a fourth valve 336 to control the opening and closing of the wastewater discharge outlet. In some embodiments, the wastewater collected in the wastewater pool 311 is transported to the wastewater heat exchange flow channel of the wastewater heat exchanger 334 through the second pump 333 for heat exchange with the new water heat exchange flow channel. Wherein, the new water heat exchange flow channel is provided with a fourth inlet and a fourth outlet.

[0053] The pipeline connection assembly includes a third pipeline 343, a fifth pipeline 344 and a new water input pipe 341, one end of the new water input pipe 341 is a new water flow inlet, the other end of the new water input pipe 341 is connected to the second inlet, the new water input pipe 341 is provided with a first valve component 342 to control the opening and closing of the new water input pipe 341, the two ends of the third pipeline 343 are respectively connected to the second outlet and the fourth inlet, the fourth outlet is provided with a replenishing water pipeline 348 connected to the first pipeline 322, the replenishing water pipeline 348 is provided with a second valve component 349 to control the opening and closing of the replenishing water pipeline 348, one end of the fifth pipeline 344 is connected to the third pipeline 343, the other end of the fifth pipeline 344 is a new water discharge outlet, and the fifth pipeline 344 is provided with a third valve component 345 to control the opening and closing of the new water discharge outlet.

[0054] The water washing assembly 350 includes an eighth pipeline 351 and a ninth pipeline 353. One end of the eighth pipeline 351 is connected to the new water inlet, and the other end of the eighth pipeline 351 is connected to the third outlet, specifically connected to the seventh pipeline 335, and then connected to the third outlet through the seventh pipeline 335. The eighth pipeline 351 is provided with a fifth valve 352 to control the opening and closing of the eighth pipeline 351. One end of the ninth pipeline 353 is connected to the third inlet, and the other end of the ninth pipeline 353 is a flushing drain outlet. The ninth pipeline 353 is provided with a sixth valve 354 to control the opening and closing of the ninth pipeline 353. By providing the water washing assembly 350, new water can flow in from the eighth pipeline 351, and then backwash the wastewater heat exchange flow channel of the wastewater heat exchanger 334 from the third outlet, and then be discharged from the third inlet through the ninth pipeline 353. Since the new water in the eighth pipeline 351 needs to be introduced into the third outlet, the seventh pipeline 335 is provided with a fourth valve member 336 , which can close the seventh pipeline 335 when the wastewater heat exchanger 334 is backwashed.

[0055] In addition, the dual-source heat pump hot water system also includes a medicine washing component 360 for washing the wastewater heat exchange flow channel. The medicine washing component 360 includes a medicine water tank 361 and a tenth pipeline 362. The medicine water tank 361 is provided with a medicine water outlet and a medicine water return port. The two ends of the tenth pipeline 362 are respectively connected to the medicine water outlet and the third outlet. The tenth pipeline 362 is provided with a fourth pump 363 to transport the medicine in the medicine water tank 361 from the tenth pipeline 362 to the wastewater heat exchange flow channel. By setting the medicine washing component 360, the medicine water tank 361 contains medicine water for cleaning the pipeline. The medicine water can be selected from conventional pipeline cleaning agents on the market and water is added to prepare. The medicine water is transported by the fourth pump 363, and the medicine water is backwashed from the third outlet to the wastewater heat exchange flow channel of the wastewater heat exchanger 334, and then discharged from the ninth pipeline 354. Furthermore, the drug washing component 360 also includes an eleventh pipeline 364, one end of the eleventh pipeline 364 is connected to the ninth pipeline 353, thereby connecting to the third inlet, and the other end of the eleventh pipeline 364 is connected to the medicine return port, so that the medicine can flow back from the wastewater heat exchange channel to the medicine tank 361, and the eleventh pipeline 364 is provided with a seventh valve member 365 to control the opening and closing of the eleventh pipeline. It can be understood that the medicine is transported by the fourth pump 363, and the medicine is used to backwash the wastewater heat exchange channel of the wastewater heat exchanger 334 from the third outlet. When the wastewater heat exchange channel is dirty at first, it can be discharged through the ninth pipeline 353, and the medicine can be returned to the medicine tank 361 in subsequent backwashing.

[0056] In addition, the medicine return port is provided with a twelfth pipeline 393 connected with the eighth pipeline 351, so that new water can be added to the medicine tank 361 from the eighth pipeline 351 and the second pipeline 324. The twelfth pipeline 393 is provided with an eighth valve 394 to control the opening and closing of the twelfth pipeline 393. In this way, new water can be added to the medicine tank 361.

[0057] In some embodiments, the tenth pipeline 362 is provided with a thirteenth pipeline 368 connected to the second pipeline 324 to connect to the first outlet, and the eleventh pipeline 364 is provided with a fourteenth pipeline 366 connected to the first pipeline 322 to connect to the first inlet, so that the medicine in the medicine tank 361 is transported from the tenth pipeline 362, the thirteenth pipeline 368 and the second pipeline 324 to the condenser heat exchange flow channel through the fourth pump 363, and then flows back to the medicine tank 361 from the fourteenth pipeline 366 and the eleventh pipeline 364, the fourteenth pipeline 366 is provided with a ninth valve component 367 to control the opening and closing of the fourteenth pipeline 366, and the bottom of the medicine tank 361 is provided with a fifteenth pipeline 391 for discharging medicine, and the fifteenth pipeline 391 is provided with a tenth valve component 392.

[0058] In the above technical scheme, the connection design of each pipeline and the opening and closing control of each valve can be made so that the dual-source heat pump hot water system of the present invention has multiple application modes, improves adaptability and application scope, and the specific control method and principle of each mode will be explained in the control method of the dual-source heat pump hot water system presented below.

[0059] Reference Figures 3 to 5 The present application also provides a control method for a dual-source heat pump hot water system, which controls the dual-source heat pump hot water system and adjusts the dual-source heat pump hot water system to a wastewater waste heat utilization water replenishment heating mode, wherein the wastewater waste heat utilization water replenishment heating mode includes a direct heating mode and a circulation heating mode.

[0060] Reference Figure 3 and Figure 5 , the heat pump unit 310 is turned on, the second valve 349 is turned on, the third valve 345 is closed, and the fourth valve 336 is turned on; since the water washing component and the drug washing component are provided, the fourth valve 336 also needs to be turned on, the fifth valve 352 is closed, the sixth valve 354 is closed, the seventh valve 365 is closed, the eighth valve 394 is closed, the ninth valve 367 is closed, and the tenth valve 392 is closed. The first pump 323 is turned on, and the second pump 333 is turned on; since the drug washing component is provided, the fourth pump 363 should also be closed.

[0061] At this time, if Figure 5 As shown, the circulating heating mode of the wastewater residual heat utilization water supply heating mode is as follows: the new water flows from the new water input pipe 341 to the evaporator heat exchange flow channel, then flows to the new water heat exchange flow channel of the wastewater heat exchanger 334 through the third pipe 343, and then flows to the first pipe 322 through the water supply pipe 348. The heated water of the hot water tank 321 flows out through the first pipe 322, and flows to the condenser heat exchange flow channel together with the new water flowing in through the water supply pipe 348, and then flows back to the hot water tank 321 through the second pipe 324. The wastewater of the wastewater tank 331 flows to the wastewater heat exchange flow channel of the wastewater heat exchanger 334 through the sixth pipe 332, and then is discharged through the seventh pipe 335.

[0062] It is understandable that when the hot water tank needs to be replenished, the new water is cooled down by passing through the evaporator first, and the temperature difference between the new water and the waste water is increased to enhance the heat exchange effect, improve the efficiency of waste heat utilization of waste water, and allow the new water to fully absorb the heat of the waste water. Specifically, the new water first enters the evaporator of the heat pump component to release heat and cool down, and then exchanges heat with the waste water through the waste water heat exchanger. The water flow after heat exchange is mixed with the circulating hot water, and then enters the condenser to absorb the previously released heat, and is heated to the required temperature at one time, and finally enters the hot water tank.

[0063] To further illustrate, in the specific application of the present application, in this embodiment, the new water selected is tap water, of course, well water can also be selected in other embodiments.

[0064] Figure 5 The waste water waste heat utilization water replenishment heating mode is shown, and the hot water is heated by a circulation heating method, that is, the heating water in the hot water tank 321 and the new water flowing into the water replenishment pipe 348 flow to the condenser heat exchange flow channel together, and then flow back to the hot water tank 321 through the second pipe 324 after being heated.

[0065] Reference Figure 4 , also shows the wastewater waste heat utilization water heating mode, but the hot water is heated by direct heating, which is the same as Figure 5 The circulation heating method shown is different in that the first pump 323 is turned off. At this time, the heated water in the hot water tank 321 does not flow to the condenser heat exchange flow channel through the first pipe 322. At this time, the condenser 312 only heats the new water flowing in through the water supply pipe 348. At this time, the direct heating method of the wastewater residual heat utilization water supply heating mode is: the new water flows from the new water input pipe 341 to the evaporator heat exchange flow channel, then flows to the new water heat exchange flow channel of the wastewater heat exchanger 334 through the third pipe 343, and then flows to the first pipe 322 through the water supply pipe 348. The new water flowing in through the water supply pipe 348 flows to the condenser heat exchange flow channel, and then flows back to the hot water tank 321 through the second pipe 324. The wastewater in the wastewater tank 331 flows to the wastewater heat exchange flow channel of the wastewater heat exchanger 334 through the sixth pipe 332, and then is discharged through the seventh pipe 335.

[0066] In the application, whether to choose direct heating or circulating heating for water replenishment, the user can choose according to the required temperature of the hot water. If the required water replenishment temperature is not high, direct heating can be used with high water replenishment efficiency; if the required water replenishment temperature is high, circulating heating can be selected.

[0067] In the above dual-source heat pump hot water system, the pipeline connection assembly also includes a fourth pipeline 346, the two ends of the fourth pipeline 346 are respectively connected to the fourth outlet and the second inlet, and the fourth pipeline 346 is provided with a third pump 347 to transport the new water in the third pipeline 343 to the new water heat exchange flow channel and then flow to the fourth pipeline 346. Among them, one end of the water supply pipeline 348 connected to the fourth outlet is connected to the fourth pipeline 346, thereby communicating with the fourth outlet. On this basis, the present application also presents a control method for a dual-source heat pump hot water system, which controls the above dual-source heat pump hot water system and adjusts the dual-source heat pump hot water system to a wastewater source heat pump hot water mode or a water source heat pump hot water mode.

[0068] Reference Figure 3 and Figure 6, the heat pump unit 310 is turned on, the first valve 342 is closed, the second valve 349 is closed, and the third valve 345 is closed; because the water washing component and the drug washing component are provided, the fourth valve 336 is also required to be turned on, the fifth valve 352 is closed, the sixth valve 354 is closed, the seventh valve 365 is closed, the eighth valve 394 is closed, the ninth valve 367 is closed, and the tenth valve 392 is closed. The first pump 323 is turned on, the second pump 333 is turned on, and the third pump 347 is turned on; because the drug washing component is provided, the fourth pump 363 should also be closed.

[0069] At this time, if Figure 6 As shown, the hot water mode of the wastewater source heat pump is: cold water circulates between the evaporator heat exchange flow channel, the third pipeline 343, the new water heat exchange flow channel, and the fourth pipeline 346 under the action of the third pump 347. The heated water of the hot water tank 321 flows to the condenser heat exchange flow channel through the first pipeline 322, and then flows back to the hot water tank 321 through the second pipeline 324. The wastewater in the wastewater tank 331 flows to the wastewater heat exchange flow channel through the sixth pipeline 332, and then is discharged through the seventh pipeline 335. It can be understood that when the water temperature of the hot water tank is too low and needs to be heated, the waste heat of the wastewater is used to select an indirect heat exchange method. Specifically, the circulating cold water and the wastewater are heat-exchanged in the wastewater heat exchanger, and the waste heat of the wastewater is absorbed by the wastewater heat exchanger to heat the circulating cold water. The circulating cold water releases heat through the evaporator, and the condenser heats the circulating hot water with the absorbed heat, so that the temperature in the hot water tank can be continuously heated.

[0070] Reference Figure 3 and Figure 7 , the heat pump unit 310 is turned on, the second valve 349 is closed, and the third valve 345 is turned on; because the water washing component and the drug washing component are provided, the fourth valve 336 is also closed, the fifth valve 352 is closed, the sixth valve 354 is closed, the seventh valve 365 is closed, the eighth valve 394 is closed, the ninth valve 367 is closed, and the tenth valve 392 is closed. The first pump 323 is turned on, the second pump 333 is closed, and the third pump 347 is closed; because the drug washing component is provided, the fourth pump 363 should also be closed.

[0071] At this time, if Figure 7 As shown, the water source heat pump hot water mode is: new water flows from the new water input pipe 341 to the evaporator heat exchange flow channel, and then is discharged through the third pipe 343 and the fifth pipe 344. The heated water in the hot water tank 321 flows through the first pipe 322 to the condenser heat exchange flow channel, and then flows back to the hot water tank 321 through the second pipe 324. It can be understood that when the waste water is insufficient, the heat pump component uses the new water as a heat source to heat the circulating hot water, so that the temperature in the hot water tank 321 gradually rises. Specifically, the new water flows through the evaporator, releases heat and is discharged, and the condenser heats the circulating hot water with the absorbed heat, and the temperature of the hot water tank continues to increase.

[0072] Reference Figure 3 , Figures 8 to 10 The present application also provides a control method for a dual-source heat pump hot water system, which controls the above-mentioned dual-source heat pump hot water system and adjusts the dual-source heat pump hot water system to a wastewater heat exchanger water washing mode, a wastewater heat exchanger chemical washing mode, or a condenser descaling mode.

[0073] Reference Figure 3 and Figure 8 , the heat pump unit 310 is turned off, the first valve member 342 is turned off, the second valve member 349 is turned off, the third valve member 345 is turned off, the fourth valve member 336 is turned off, the fifth valve member 352 is turned on, the sixth valve member 354 is turned on, the seventh valve member 365 is turned off, the eighth valve member 394 is turned off, the ninth valve member 367 is turned off, and the tenth valve member 392 is turned off. In order not to affect the normal operation of the system, the first pump 323, the second pump 333, the third pump 347 and the fourth pump 363 should also be turned off.

[0074] At this time, if Figure 8 As shown, the water washing mode of the wastewater heat exchanger is: new water flows from the eighth pipeline 351 to the wastewater heat exchange flow channel, and then is discharged from the ninth pipeline 353. In some embodiments, the eighth pipeline 351 is connected to the new water input pipe 341, and the connection point is located at the water inlet front end of the first valve member 342, that is, the first valve member 342 does not interfere with the eighth pipeline 351.

[0075] Since high-temperature wastewater usually contains corrosiveness, oil and suspended matter, oil is easy to adhere to the wastewater heat exchange flow channel of the wastewater heat exchanger, reducing the water flow rate and heat exchange efficiency, so it needs to be cleaned frequently. The water washing mode is used for daily washing. New water is introduced into the third outlet of the wastewater heat exchange flow channel through the eighth pipeline to backwash the wastewater heat exchange flow channel. At the same time, other pipelines that affect backwashing are closed through various valves. Backwashing the wastewater heat exchange flow channel of the wastewater heat exchanger can improve the efficiency and service life of the wastewater heat exchanger and reduce the cleaning workload of personnel.

[0076] Reference Figure 3 and Fig. 9 First, turn off the heat pump unit 310, turn off the second pump 333, turn on the fourth pump 363, and in order not to affect the normal operation of the system, the first pump 323 and the third pump 347 should also be turned off. Close the first valve 341, the second valve 349, the third valve 345, the fourth valve 336, the fifth valve 352, the sixth valve 354, the seventh valve 365, the eighth valve 394, the ninth valve 367, and the tenth valve 392.

[0077] At this time, you can combine Fig. 9It can be understood that the chemical washing mode of the wastewater heat exchanger is: the chemical solution in the chemical solution tank 361 flows to the wastewater heat exchange flow channel through the tenth pipeline 362 under the action of the fourth pump 363, and then is discharged from the ninth pipeline 353.

[0078] Then, the sixth valve member 354 is closed and the seventh valve member 365 is opened. Fig. 9 As shown, the chemical washing mode of the wastewater heat exchanger is: the chemical in the chemical tank 361 flows to the wastewater heat exchange flow channel through the tenth pipeline 362 under the action of the fourth pump 363, and then flows back to the chemical tank 361 from the eleventh pipeline 364.

[0079] It is understandable that after long-term use, it is difficult to clean the attached oil stains from the wastewater heat exchanger flow channel of the wastewater heat exchanger even if it is washed with water. At this time, the wastewater heat exchanger flow channel of the wastewater heat exchanger is backwashed with chemical water by chemical washing, which can improve the efficiency and service life of the wastewater heat exchanger without disassembling the wastewater heat exchanger for cleaning. Among them, since the wastewater heat exchanger flow channel is relatively dirty when the wastewater heat exchanger 334 is just chemically washed, the cleaned chemical water is first discharged through the ninth pipeline 353, and in the subsequent chemical water backwashing process, the chemical water can be returned to the chemical water tank 361.

[0080] In the wastewater heat exchanger chemical washing mode, after the wastewater heat exchanger 334 is cleaned, the chemical in the chemical tank 361 is already mixed with a lot of dirt. At this time, the tenth valve 392 is opened to drain the contaminated chemical through the fifteenth pipe 391. Then, water is added to the chemical tank 361 again. At this time, the tenth valve 392 needs to be closed, the eighth valve 394 needs to be opened, and new water is injected into the chemical tank 361 through the eighth pipeline 351 and the twelfth pipeline 393. The pipeline cleaning agent can be added again for modulation later.

[0081] Reference Figure 3 and Fig.10 , the fourth pump 363 is turned on, and in order not to affect the normal operation of the system, the first pump 323, the second pump 333 and the third pump 347 should also be turned off. The first valve 341 is closed, the second valve 349 is closed, the third valve 345 is closed, the fourth valve 336 is closed, the fifth valve 352 is closed, the sixth valve 354 is closed, the seventh valve 365 is closed, the eighth valve 394 is closed, the ninth valve 367 is turned on, and the tenth valve 392 is closed.

[0082] At this time, if Fig.10As shown, the condenser descaling mode is: the medicine in the medicine tank 361 flows to the first outlet of the condenser heat exchange flow channel through the tenth pipeline 362, the thirteenth pipeline 368 and the second pipeline 324 under the action of the fourth pump 363, and then flows out from the first inlet, through the first pipeline 322, the fourteenth pipeline 366 and the eleventh pipeline 364 back to the medicine tank 361. It can be understood that the condenser 312 of the heat pump unit 310 flows through high-temperature hot water, and it is easy to scale on the pipe wall after long-term use. Scaling will seriously reduce the heat exchange efficiency. Through the condenser descaling mode, the condenser heat exchange flow channel of the condenser 312 can be backwashed with medicine to remove the dirt on the pipe wall. Similarly, in the condenser descaling mode, after the condenser 312 is cleaned, the medicine in the medicine tank 361 has been mixed with a lot of dirt. At this time, the tenth valve 392 is opened to discharge the contaminated medicine through the fifteenth pipe 391. And referring to the chemical washing mode of the wastewater heat exchanger, refill water into the chemical tank 361, and subsequently re-add the pipeline cleaning agent for preparation.

[0083] In the present application, the dual-source heat pump hot water system also involves the design of a refrigeration component 370 and a heating component 380 .

[0084] Reference Fig.11 and Fig.12 The dual-source heat pump hot water system further includes a refrigeration component 370, which includes a first air conditioning heat exchanger 371, one end of the first air conditioning heat exchanger 371 is connected to the second inlet through a sixteenth pipeline 372, and the other end of the first air conditioning heat exchanger 371 is connected to the second outlet through a seventeenth pipeline 373. The sixteenth pipeline 372 or the seventeenth pipeline 373 is provided with a fifth pump 374, so that the water flows from the seventeenth pipeline 373 through the first air conditioning heat exchanger 371 and then flows to the sixteenth pipeline 372. In this embodiment, the fifth pump 374 is provided in the sixteenth pipeline 372, and the seventeenth pipeline 373 is provided with an eleventh valve member 375.

[0085] In this application, the dual-source heat pump hot water system can be controlled to adjust the dual-source heat pump hot water system to the combined cooling and heating mode. In the combined cooling and heating mode, refer to Fig.12 , wherein the heat pump unit 310 is turned on, the first valve element 342 is turned on, the eleventh valve element 375 is turned on, the second valve element 349 is turned off, the third valve element 345 is turned off, the fourth valve element 336 is turned off, the fifth valve element 352 is turned off, the sixth valve element 354 is turned off, the seventh valve element 365 is turned off, the eighth valve element 394 is turned off, the ninth valve element 367 is turned off, and the tenth valve element 392 is turned off. The first pump 323 is turned on, the second pump 333 is turned off, the third pump 347 is turned off, the fourth pump 363 is turned off, and the fifth pump 374 is turned on.

[0086] like Fig.12As shown, under the action of the fifth pump 374, the water flows from the seventeenth pipeline 373 through the first air conditioning heat exchanger 371 to the sixteenth pipeline 372, then passes through the evaporator heat exchange flow channel, is cooled by the evaporator, and then flows to the seventeenth pipeline 373. The heated water in the hot water tank 321 flows through the first pipeline 322 to the condenser heat exchange flow channel, is heated by the condenser, and then flows back to the hot water tank 321 through the second pipeline 324. It can be understood that some occasions require both hot water production and air conditioning refrigeration. With the above-mentioned combined heat and cold supply mode, after the heat pump unit is started, on the one hand, the condenser heats the water flowing through the condenser heat exchange flow channel to produce hot water, and on the other hand, the evaporator cools the water flowing through the evaporator heat exchange flow channel, and then realizes air refrigeration through the first air conditioning heat exchanger to supply cold air. This "hot water + cold air" combined heat and cold supply mode is both hot and cold, and is energy-saving and efficient.

[0087] Reference Fig.11 , Fig.13 and Fig.14 The dual-source heat pump hot water system further includes a heating component 380, which includes a second air conditioning heat exchanger 381, one end of the second air conditioning heat exchanger 381 is connected to the hot water tank 321 through the eighteenth pipeline 382, ​​and the other end of the first air conditioning heat exchanger 371 is connected to the circulating water inlet through the nineteenth pipeline 383. The eighteenth pipeline 382 or the nineteenth pipeline 383 is provided with a sixth pump 384, so that the water flows from the eighteenth pipeline 382 through the second air conditioning heat exchanger and then flows to the nineteenth pipeline 383. In this embodiment, the sixth pump 384 is provided in the eighteenth pipeline 382, ​​and the nineteenth pipeline 383 is provided with a twelfth valve 385.

[0088] In this application, the dual-source heat pump hot water system can be controlled to adjust the dual-source heat pump hot water system to the wastewater source heat pump heating mode. In the wastewater source heat pump heating mode, heating is based on the wastewater source heat pump hot water mode. When understanding this mode, those skilled in the art can refer to Figure 6 The wastewater source heat pump hot water mode shown is that the heat pump unit 310 is turned on, the first valve 342 is closed, the second valve 349 is closed, the third valve 345 is closed, the fourth valve 336 is turned on, the fifth valve 352 is closed, the sixth valve 354 is closed, the seventh valve 365 is closed, the eighth valve 394 is closed, the ninth valve 367 is closed, and the tenth valve 392 is closed. The first pump 323 is turned on, the second pump 333 is turned on, the third pump 347 is turned on, and the fourth pump 363 is turned off. And, as Fig.13 , the sixth pump 384 is opened, and the twelfth valve member 385 is opened. It can be understood that, referring to Fig.13Under the action of the third pump 347, the cold water circulates among the evaporator heat exchange flow channel, the third pipeline 343, the new water heat exchange flow channel, and the fourth pipeline 346. The heated water in the hot water tank 321 flows to the condenser heat exchange flow channel through the first pipeline 322, and then flows back to the hot water tank 321 through the second pipeline 324. The wastewater in the wastewater tank 331 flows to the wastewater heat exchange flow channel through the sixth pipeline 332, and then is discharged through the seventh pipeline 335. The circulating cold water and the wastewater exchange heat in the wastewater heat exchanger, and the wastewater heat exchanger absorbs the waste heat of the wastewater to heat the circulating cold water. The circulating cold water releases heat through the evaporator, and the condenser heats the circulating hot water with the absorbed heat, so that the temperature in the hot water tank can continue to rise. In the heating component 380, under the action of the sixth pump 384, the hot water in the hot water tank 321 flows from the eighteenth pipeline 382 through the second air-conditioning heat exchanger 381 to the nineteenth pipeline 383, and then flows back to the hot water tank 321. The second air-conditioning heat exchanger 381 heats the external air, thereby providing heating.

[0089] In this application, the dual-source heat pump hot water system can be controlled to adjust the dual-source heat pump hot water system to the water source heat pump heating mode. In the water source heat pump heating mode, heating is based on the water source heat pump hot water mode. When understanding this mode, those skilled in the art can refer to Figure 7 The water source heat pump hot water mode shown is that the heat pump unit 310 is turned on, the second valve 349 is closed, the third valve 345 is turned on, the fourth valve 336 is closed, the fifth valve 352 is closed, the sixth valve 354 is closed, the seventh valve 365 is closed, the eighth valve 394 is closed, the ninth valve 367 is closed, and the tenth valve 392 is closed. The first pump 323 is turned on, the second pump 333 is closed, the third pump 347 is closed, and the fourth pump 363 is closed. And, as Fig.14 , the sixth pump 384 is opened, and the twelfth valve member 385 is opened. It can be understood that, referring to Fig.14 , the new water flows from the new water input pipe 341 to the evaporator heat exchange flow channel, and then is discharged through the third pipe 343 and the fifth pipe 344. The heated water in the hot water tank 321 flows through the first pipe 322 to the condenser heat exchange flow channel, and then flows back to the hot water tank 321 through the second pipe 324. The heat pump component uses the new water as a heat source to heat the circulating hot water, so that the temperature in the hot water tank 321 gradually rises. Specifically, the new water flows through the evaporator, releases heat and is discharged, and the condenser heats the circulating hot water with the absorbed heat, and the temperature of the hot water tank continues to increase. In the heating component 380, under the action of the sixth pump 384, the hot water in the hot water tank 321 flows from the eighteenth pipe 382 through the second air conditioning heat exchanger 381 to the nineteenth pipe 383, and then flows back to the hot water tank 321. The second air conditioning heat exchanger 381 heats the external air, thereby performing heating.

[0090] The embodiments of the present application are described in detail above in conjunction with the accompanying drawings, but the present application is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present application.

Claims

1. A dual-source heat pump hot water system, characterized in that: include A heat pump unit, the heat pump unit comprising a compressor, a condenser, a throttling element and an evaporator forming a refrigerant cycle, the condenser having a condenser heat exchange flow channel, the evaporator having an evaporator heat exchange flow channel, the condenser heat exchange flow channel being provided with a first inlet and a first outlet, the evaporator heat exchange flow channel being provided with a second inlet and a second outlet; A hot water circulation component, the hot water circulation component comprises a hot water tank, a first pipeline and a second pipeline, the hot water tank is provided with a circulation water inlet and a circulation water outlet, the two ends of the first pipeline are respectively connected to the circulation water outlet and the first inlet, the two ends of the second pipeline are respectively connected to the first outlet and the circulation water inlet, the first pipeline or the second pipeline is provided with a first pump to transport the heating water in the hot water tank from the first pipeline to the condenser heat exchange flow channel of the condenser for heating, and then return to the hot water tank from the second pipeline; A wastewater heat exchange component, the wastewater heat exchange component comprising a wastewater heat exchanger, the wastewater heat exchanger having a wastewater heat exchange flow channel and a new water heat exchange flow channel for exchanging heat with each other, the wastewater heat exchange flow channel being used to pass wastewater, the wastewater heat exchange flow channel being provided with a third inlet and a third outlet, the new water heat exchange flow channel being provided with a fourth inlet and a fourth outlet, the wastewater heat exchange component further comprising a wastewater pool for holding wastewater, the wastewater pool being connected to the third inlet via a sixth pipeline, the sixth pipeline being provided with a second pump to pass wastewater into the wastewater heat exchange flow channel, the third outlet being provided with a seventh pipeline connected thereto, the other end of the seventh pipeline being a wastewater discharge outlet; A pipeline connection assembly, the pipeline connection assembly includes a third pipeline, a fourth pipeline, a fifth pipeline and a new water input pipe, one end of the new water input pipe is a new water inlet, the other end of the new water input pipe is connected to the second inlet, the new water input pipe is provided with a first valve to control the opening and closing of the new water input pipe, the two ends of the third pipeline are respectively connected to the second outlet and the fourth inlet, the fourth outlet is provided with a water replenishment pipeline connected to the first pipeline, the water replenishment pipeline is provided with a second valve to control the opening and closing of the water replenishment pipeline, one end of the fifth pipeline is connected to the third pipeline, the other end of the fifth pipeline is a new water discharge outlet, the fifth pipeline is provided with a third valve to control the opening and closing of the new water discharge outlet; the two ends of the fourth pipeline are respectively connected to the fourth outlet and the second inlet, the fourth pipeline is provided with a third pump to transport the new water in the third pipeline to the new water heat exchange flow channel and then flow to the fourth pipeline; as well as a water washing assembly, the water washing assembly comprising an eighth pipeline and a ninth pipeline, one end of the eighth pipeline being connected to the new water inlet, the other end of the eighth pipeline being connected to the third outlet, the eighth pipeline being provided with a fifth valve to control the opening and closing of the eighth pipeline, one end of the ninth pipeline being connected to the third inlet, the other end of the ninth pipeline being a flushing drain outlet, the ninth pipeline being provided with a sixth valve to control the opening and closing of the ninth pipeline; and A drug washing component for performing drug washing on the wastewater heat exchange flow channel, the drug washing component includes a drug water tank, a tenth pipeline and an eleventh pipeline, the drug water tank is provided with a drug water outlet and a drug water return port, the two ends of the tenth pipeline are respectively connected to the drug water outlet and the third outlet, one end of the eleventh pipeline is connected to the ninth pipeline, thereby connecting to the third inlet, and the other end of the eleventh pipeline is connected to the drug water return port, so that the drug water can flow back from the wastewater heat exchange flow channel to the drug water tank, the tenth pipeline is provided with a thirteenth pipeline connected to the second pipeline, and the eleventh pipeline is provided with a fourteenth pipeline connected to the first pipeline.

2. The dual-source heat pump hot water system according to claim 1, characterized in that: The seventh pipeline is provided with a fourth valve member to control the opening and closing of the wastewater outlet.

3. The dual-source heat pump hot water system according to claim 2, characterized in that: The tenth pipeline is provided with a fourth pump to transport the medicine in the medicine tank from the tenth pipeline to the wastewater heat exchange flow channel.

4. The dual-source heat pump hot water system according to claim 3, characterized in that: The eleventh pipeline is provided with a seventh valve component to control the opening and closing of the eleventh pipeline.

5. The dual-source heat pump hot water system according to claim 4, characterized in that: The medicine return port is provided with a twelfth pipeline connected with the eighth pipeline, so that new water can be added to the medicine tank from the eighth pipeline and the second pipeline.

6. The dual-source heat pump hot water system according to claim 5, characterized in that: The tenth pipeline is arranged to connect the thirteenth pipeline with the second pipeline to connect the first outlet, and the eleventh pipeline is arranged to connect the fourteenth pipeline with the first pipeline to connect the first inlet, so that the medicine in the medicine tank is transported from the tenth pipeline, the thirteenth pipeline and the second pipeline to the condenser heat exchange flow channel through the fourth pump component, and then flows back to the medicine tank from the fourteenth pipeline and the eleventh pipeline, and the fourteenth pipeline is provided with a ninth valve component to control the opening and closing of the fourteenth pipeline, and the bottom of the medicine tank is provided with a fifteenth pipeline for discharging medicine, and the fifteenth pipeline is provided with a tenth valve component.

7. A control method for a dual-source heat pump hot water system, characterized in that: The dual-source heat pump hot water system according to any one of claims 2 to 6 is controlled to be adjusted to a wastewater waste heat utilization water replenishment heating mode, wherein the wastewater waste heat utilization water replenishment heating mode includes a direct heating mode and a circulation heating mode, wherein: The direct heating method of the wastewater residual heat utilization water supply heating mode is as follows: new water flows from the new water input pipe to the evaporator heat exchange flow channel, then flows to the new water heat exchange flow channel through the third pipeline, and then flows to the first pipeline through the water supply pipeline; the new water flowing into the water supply pipeline flows to the condenser heat exchange flow channel, and then flows back to the hot water tank through the second pipeline; the wastewater in the wastewater pool flows to the wastewater heat exchange flow channel through the sixth pipeline, and then is discharged through the seventh pipeline; The circulating heating method of the wastewater waste heat utilization water replenishment heating mode is: new water flows from the new water input pipe to the evaporator heat exchange flow channel, then flows to the new water heat exchange flow channel through the third pipeline, and then flows to the first pipeline through the replenishment water pipeline; the heated water of the hot water tank flows out through the first pipeline, and flows to the condenser heat exchange flow channel together with the new water flowing into the replenishment water pipeline, and then flows back to the hot water tank through the second pipeline; the wastewater in the wastewater pool flows to the wastewater heat exchange flow channel through the sixth pipeline, and then is discharged through the seventh pipeline.

8. A control method for a dual-source heat pump hot water system, characterized in that: The dual-source heat pump hot water system according to any one of claims 1 to 4 is controlled to be adjusted to a wastewater source heat pump hot water mode or a water source heat pump hot water mode, wherein: The hot water mode of the wastewater source heat pump is as follows: cold water circulates among the evaporator heat exchange flow channel, the third pipeline, the new water heat exchange flow channel, and the fourth pipeline under the action of the third pump; the heated water of the hot water tank flows to the condenser heat exchange flow channel through the first pipeline, and then flows back to the hot water tank through the second pipeline; the wastewater of the wastewater pool flows to the wastewater heat exchange flow channel through the sixth pipeline, and then is discharged through the seventh pipeline; The hot water mode of the water source heat pump is: new water flows from the new water input pipe to the evaporator heat exchange channel, and then is discharged through the third pipeline and the fifth pipeline; the heated water in the hot water tank flows through the first pipeline to the condenser heat exchange channel, and then flows back to the hot water tank through the second pipeline.

9. A control method for a dual-source heat pump hot water system, characterized in that: The dual-source heat pump hot water system according to claim 6 is controlled to be adjusted to a wastewater heat exchanger water washing mode, a wastewater heat exchanger chemical washing mode or a condenser descaling mode, wherein: The water washing mode of the wastewater heat exchanger is: new water flows from the eighth pipeline to the wastewater heat exchange flow channel, and then is discharged from the ninth pipeline; The chemical washing mode of the wastewater heat exchanger is as follows: the chemical in the chemical water tank flows to the wastewater heat exchange flow channel through the tenth pipeline under the action of the fourth pump, and then is discharged from the ninth pipeline or flows back to the chemical water tank from the eleventh pipeline; The condenser descaling mode is as follows: the medicine in the medicine tank flows to the condenser heat exchange channel through the tenth pipeline, the thirteenth pipeline and the second pipeline under the action of the fourth pump, and then flows back to the medicine tank from the first pipeline, the fourteenth pipeline and the eleventh pipeline.

Images