Heating system and method using sensible heat or latent heat double-source heat pump without freezing rivers
By adopting a dual source heat pump heating system for sensible or latent heat that does not freeze rivers in cold areas, the problems of high energy consumption, frost and defrost problems and resource waste in the existing technology are solved, and efficient, stable and resource-saving heating effects are achieved.
Patent Information
- Application Number
- CN202411729141.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-28
- Publication Date
- 2025-03-14
AI Technical Summary
In cold areas, existing ground source heat pumps and solar heat pumps have problems such as high energy consumption, frost and defrost problems, heat imbalance and resource waste.
A dual source heat pump heating system for sensible or latent heat that utilizes the unfrozen river is adopted. The system includes the first river water heat exchanger, the second river water heat exchanger, the deicing heat exchanger and the heating water heat exchanger. It is connected by refrigerant pipelines and deicing pipelines to achieve efficient utilization and deicing of the river water.
The system improves heating efficiency through the combination of dual source heat pumps, avoids the poor stability and indoor comfort problems caused by frequent unit switching, and achieves the effect of fast deicing speed, thoroughness and low power consumption through the combination of heat medium melting ice and gravity deicing.
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Abstract
Description
Technical Field
[0001] The invention belongs to the field of new energy heating, and relates to a dual-source heat pump heating system and method utilizing sensible heat or latent heat of an unfrozen river. Background Art
[0002] As we all know, heat pump is a highly efficient and energy-saving device that can make full use of low-grade thermal energy. However, the Northeast region is a cold area with a long winter, which makes the application of heat pump technology in cold regions extremely limited. For example, air source heat pumps have high energy consumption and are prone to frosting and defrosting problems; ground source heat pumps are prone to thermal imbalance problems; solar heat pumps have low heat flux density and intermittent properties.
[0003] On the other hand, the water of the unfrozen rivers in the north does not freeze even at -20℃, and the water temperature of the river is highly usable. However, the water heat is not currently utilized, resulting in a waste of resources. Summary of the invention
[0004] The object of the present invention is to provide a dual-source heat pump heating system and method using sensible heat or latent heat of the unfrozen river, which solves the above-mentioned shortcomings of existing ground source heat pumps and solar heat pumps used in cold areas.
[0005] In order to achieve the above object, the technical solution adopted by the present invention is: The present invention provides a dual-source heat pump heating system using sensible heat or latent heat of an unfrozen river, comprising a first river water heat exchanger, a second river water heat exchanger, a deicing heat exchanger and a heating water heat exchanger, wherein: The river water inlets on the first river water heat exchanger and the second river water heat exchanger are connected to river water inlet pipes; The first river water heat exchanger and the second river water heat exchanger are both connected to the heating water heat exchanger through a refrigerant pipeline; The first river water heat exchanger and the second river water heat exchanger are both connected to the deicing heat exchanger through a deicing pipeline; The heating water heat exchanger is connected to a heating system via a deicing heat exchanger.
[0006] Preferably, the first river water heat exchanger and the second river water heat exchanger are connected to the river water inlet pipe through a cold water pipeline, and a solenoid valve and a pressure gauge are provided on the cold water pipeline.
[0007] Preferably, the refrigerant pipeline includes a refrigerant supply pipeline and a refrigerant loop pipeline, wherein both the refrigerant supply pipeline and the refrigerant loop pipeline are provided with solenoid valves.
[0008] Preferably, the deicing pipeline comprises a deicing refrigerant supply pipeline and a deicing refrigerant circuit pipeline, wherein both the deicing refrigerant supply pipeline and the deicing refrigerant circuit pipeline are provided with solenoid valves.
[0009] Preferably, the refrigerant outlets provided on the first river water heat exchanger and the second river water heat exchanger are both provided with ethylene glycol pumps.
[0010] Preferably, the river water heat exchanger comprises a heat exchange shell, a cold water inlet head, a refrigerant inlet head, a refrigerant outlet head, a first heat exchange fin and a second heat exchange fin, wherein: The first heat exchange fins and the second heat exchange fins are alternately arranged in the heat exchange shell, a plurality of cold water channels are arranged side by side in the inner cavity of the first heat exchange fins, and a refrigerant channel with an S-shaped structure is arranged in the inner cavity of the second heat exchange fins; The cold water channel is arranged in a vertical direction, and the refrigerant channel is arranged in a horizontal direction; An upper cover plate is provided on the top of the heat exchange shell, a cold water inlet seal head is provided on the upper cover plate, and the cold water inlet seal head is connected to the water inlet of the cold water channel; A lower cover plate is provided at the bottom of the heat exchange shell, a water outlet is provided on the lower cover plate, and the water outlet is connected to the second river water return pipe; A refrigerant inlet head and a refrigerant outlet head are arranged on the side wall of the heat exchange shell, and the refrigerant inlet head 1203 and the refrigerant outlet head are respectively arranged at the lower end and the upper end of the side of the heat exchange body; the refrigerant inlet head is connected to the inlet end of the refrigerant channel, and the refrigerant outlet head is connected to the outlet end of the refrigerant channel.
[0011] Preferably, the heating water heat exchanger includes an evaporator and a condenser, wherein the refrigerant inlet and outlet arranged on the evaporator are respectively connected to the refrigerant outlet and inlet of the river water heat exchanger; the refrigerant inlet and outlet arranged on the evaporator are respectively connected to the refrigerant outlet and inlet arranged on the condenser; the circulating water inlet and outlet arranged on the condenser are respectively connected to the circulating water outlet and inlet of the heating system.
[0012] A dual-source heat pump heating method using sensible heat or latent heat of the Budong River, based on the heating system, includes the following steps: The pressures at the water inlets of the two river water heat exchangers are respectively obtained, wherein when the pressure value corresponding to the first river water heat exchanger or the second river water heat exchanger is less than the first set value, the corresponding first river water heat exchanger or the second river water heat exchanger is used for heating, and the second river water heat exchanger or the first river water heat exchanger is closed; When the pressure value corresponding to the first river water heat exchanger or the second river water heat exchanger is greater than or equal to the second set value, the second river water heat exchanger or the first river water heat exchanger is used for heating and the first river water heat exchanger or the second river water heat exchanger is de-iced.
[0013] Preferably, the corresponding first river water heat exchanger or the second river water heat exchanger is used for heating, and the second river water heat exchanger or the first river water heat exchanger is turned off. The specific method is: Close the second river water heat exchanger or the first river water heat exchanger, and close the de-icing heat exchanger; open the first river water heat exchanger or the second river water heat exchanger, and open the heating water heat exchanger; The cold water of the unfrozen river enters the first river water heat exchanger or the second river water heat exchanger to perform heat exchange with the refrigerant in the first river water heat exchanger or the second river water heat exchanger. A part of the cooled cold water freezes in the first river water heat exchanger or the second river water heat exchanger, and the other part is discharged from the first river water heat exchanger or the second river water heat exchanger. The heated refrigerant enters the heating water heat exchanger to exchange heat with the heating return water, and the cooled refrigerant returns to the first river water heat exchanger or the second river water heat exchanger; the heated heating return water enters the heating system to provide heating for users.
[0014] Preferably, the second river water heat exchanger or the first river water heat exchanger is used for heat supply and the first river water heat exchanger or the second river water heat exchanger is de-iced, and the specific method is: Close the first river water heat exchanger or the second river water heat exchanger, open the second river water heat exchanger or the first river water heat exchanger, and open the de-icing heat exchanger and the heating water heat exchanger; The cold water of the unfrozen river enters the second river water heat exchanger or the first river water heat exchanger to perform heat exchange with the refrigerant in the second river water heat exchanger or the first river water heat exchanger. A part of the cooled cold water freezes in the second river water heat exchanger or the first river water heat exchanger, and the other part is discharged from the second river water heat exchanger or the first river water heat exchanger. The heated refrigerant enters the heating water heat exchanger; The heating return water enters the de-icing heat exchanger to exchange heat with the refrigerant flowing out of the first river water heat exchanger or the second river water heat exchanger. The cooled heating return water enters the heating heat exchanger to exchange heat with the heated refrigerant flowing out of the second river water heat exchanger or the first river water heat exchanger. The cooled refrigerant flowing out of the heating heat exchanger enters the second river water heat exchanger or the first river water heat exchanger again. The heated heating circulating water enters the heating system to provide heating for users. The heated refrigerant flowing out of the deicing heat exchanger enters the first river water heat exchanger or the second river water heat exchanger to de-ice it.
[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a dual-source heat pump heating system using the sensible heat or latent heat of an unfrozen river. During the deicing process, the refrigerant flowing out of the river water heat exchanger exchanges heat with the heating circulating water entering the circulating water channel of the deicing heat exchanger. The refrigerant with a higher temperature enters the river water heat exchanger and flows from bottom to top. By removing the ice layer close to the ice body and the wall of the heat exchanger, the river water heat exchanger is de-iced by gravity. Compared with the "cold water solidification heat collection device" in which a dragon scraper is set in the heat exchange tube to scrape off the ice layer, the cold water solidification heat exchanger we provide has a compact structure, which can avoid damage to the dragon scraper and the heat exchange tube caused by scraping off the ice layer, and the mechanical process required for manufacturing is relatively simple, and the processing accuracy requirement is low; at the same time, while one river water heat exchanger is de-icing, the other river water heat exchanger continues to work to provide heating for users. Compared with the patent of "a spray type heat pump unit with water as heat source", which requires four-way valve reversing during de-icing, resulting in the room temperature of heat users to drop by about 5°C, our solution avoids the problem of poor stability of unit operation and poor indoor comfort caused by frequent switching of the unit, while extending the service life of the machine; in addition, compared with the patent of "a solidified hot water source heat pump system suitable for low temperature environment", the ice layer is not easy to fall off due to the large contact area between the ice layer and the heat exchange tube during de-icing, and the power consumption required for de-icing is large. This application adopts a combination of thermal medium melting and gravity de-icing for de-icing: fast de-icing speed, thorough de-icing, and low de-icing power consumption. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a water temperature chart of the non-freezing rivers in the north; Figure 2 This is a schematic diagram of the river water heat exchanger structure; Figure 3 This is the working diagram of the river water heat exchanger; Figure 4 This is the first heating condition; Figure 5 It is the second heating condition; Figure 6 This is the first heating and deicing condition; Figure 7 This is the second heating and deicing condition; Figure 8 It is a system schematic diagram of the present invention; Among them, the first solenoid valve 1, the second solenoid valve 2, the third solenoid valve 3, the fourth solenoid valve 4, the fifth solenoid valve 5, the sixth solenoid valve 6, the seventh solenoid valve 7, the eighth solenoid valve 8, the ninth solenoid valve 9, the tenth solenoid valve 10, the water pump 11, the first river water heat exchanger 12, the second river water heat exchanger 13, the second ethylene glycol pump 14, the first ethylene glycol pump 15, the deicing heat exchanger 16, the valve 17, the evaporator 18, the compressor 19, the expansion valve 20, the condenser 21, the first pressure gauge 22, the second pressure gauge 23, the heat exchange shell 1201, the cold water inlet head 1202, the refrigerant inlet head 1203, the refrigerant outlet head 1204, and the first heat exchange fin 1205. DETAILED DESCRIPTION
[0017] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.
[0018] It should be understood that when used in the present specification and the appended claims, the term "comprising" indicates the presence of described features, wholes, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or combinations thereof.
[0019] It should also be understood that the term “and / or” used in the specification and appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.
[0020] As used in the specification and appended claims of this application, the term "if" can be interpreted as "when" or "uponce" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrase "if it is determined" or "if [described condition or event] is detected" can be interpreted as meaning "uponce it is determined" or "in response to determining" or "uponce [described condition or event] is detected" or "in response to detecting [described condition or event]", depending on the context.
[0021] In addition, in the description of the present application specification and the appended claims, the terms "first", "second", "third", etc. are only used to distinguish the descriptions and cannot be understood as indicating or implying relative importance.
[0022] References to "one embodiment" or "some embodiments" etc. described in the specification of this application mean that one or more embodiments of the present application include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the statements "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.
[0023] Example 1 refer to Figure 1 As shown, the present embodiment provides a dual-source heat pump heating system using sensible heat or latent heat of a non-freezing river, comprising a first solenoid valve 1, a second solenoid valve 2, a third solenoid valve 3, a fourth solenoid valve 4, a fifth solenoid valve 5, a sixth solenoid valve 6, a seventh solenoid valve 7, an eighth solenoid valve 8, a ninth solenoid valve 9, a tenth solenoid valve 10, a water pump 11, a first river water heat exchanger 12, a second river water heat exchanger 13, a second ethylene glycol pump 14, a first ethylene glycol pump 15, a deicing heat exchanger 16, an eleventh solenoid valve 17, an evaporator 18, a compressor 19, an expansion valve 20, a condenser 21, a first pressure gauge 22, and a second pressure gauge 23, wherein: The river water inlet of the first river water heat exchanger 12 is connected to a river water inlet pipeline, and the river water outlet of the first river water heat exchanger 12 is connected to a first river water return pipeline.
[0024] The river water inlet of the second river water heat exchanger 13 is connected to a river water inlet pipeline, and the river water outlet of the second river water heat exchanger 13 is connected to a second river water return pipeline.
[0025] The river water inlet pipeline is connected to the river water inlets of the first river water heat exchanger 12 and the second river water heat exchanger 13 respectively through a three-way valve.
[0026] The refrigerant inlet of the first river water heat exchanger 12 is connected to the refrigerant outlet of the deicing heat exchanger 16 , and the refrigerant inlet of the deicing heat exchanger 16 is connected to the refrigerant outlet of the first river water heat exchanger 12 .
[0027] The refrigerant inlet of the second river water heat exchanger 12 is connected to the refrigerant outlet of the deicing heat exchanger 16 , and the refrigerant inlet of the deicing heat exchanger 16 is connected to the refrigerant outlet of the second river water heat exchanger 12 .
[0028] The refrigerant inlets of the first river water heat exchanger 12 and the second river water heat exchanger 13 are also connected to the refrigerant outlet of the evaporator 18; The refrigerant outlets of the first river water heat exchanger 12 and the second river water heat exchanger 13 are also connected to the refrigerant inlet of the evaporator 18 .
[0029] The refrigerant outlet of the evaporator 18 is connected to the refrigerant inlet of the condenser 21 , and the refrigerant inlet of the evaporator 18 is connected to the refrigerant outlet of the condenser 21 .
[0030] The heating water return pipeline is connected to the circulating water inlet of the deicing heat exchanger 16 .
[0031] The heating water inlet pipeline is connected to the circulating water outlet of the deicing heat exchanger 16 through the condenser 21 .
[0032] Example 2 On the basis of Example 1, this example provides a dual-source heat pump heating system utilizing sensible heat or latent heat of an unfrozen river, wherein a water pump 11 is provided on the river water inlet pipe.
[0033] The cold water pipeline connected between the river water inlet pipeline and the first river water heat exchanger 12 is provided with a first solenoid valve 1 and a first pressure gauge 22 .
[0034] The cold water pipeline connected between the river water inlet pipeline and the second river water heat exchanger 13 is provided with a second solenoid valve 2 and a second pressure gauge 23 .
[0035] A first ethylene glycol pump 15 and a sixth solenoid valve 6 are provided on the de-icing refrigerant supply pipeline connected between the refrigerant inlet of the first river water heat exchanger 12 and the refrigerant outlet of the de-icing heat exchanger 16 .
[0036] A second ethylene glycol pump 14 and a fifth solenoid valve 5 are provided on the de-icing refrigerant supply pipeline connected between the refrigerant inlet of the second river water heat exchanger 13 and the refrigerant outlet of the de-icing heat exchanger 16 .
[0037] A seventh solenoid valve 7 is provided on the de-icing refrigerant circuit pipeline connected between the refrigerant outlet of the first river water heat exchanger 12 and the refrigerant inlet of the de-icing heat exchanger 16 .
[0038] An eighth solenoid valve 8 is provided on the de-icing refrigerant circuit pipeline connected between the refrigerant outlet of the second river water heat exchanger 13 and the refrigerant inlet of the de-icing heat exchanger 16 .
[0039] A fourth solenoid valve 4 and a first ethylene glycol pump 15 are provided on the refrigerant supply pipeline connected between the refrigerant outlet of the first river water heat exchanger 12 and the refrigerant inlet of the evaporator 18 .
[0040] A tenth solenoid valve 10 is provided on the refrigerant circuit pipeline connecting the refrigerant inlet of the first river water heat exchanger 12 and the refrigerant outlet of the evaporator 18 .
[0041] The refrigerant supply pipeline connecting the refrigerant outlet of the second river water heat exchanger 13 and the refrigerant inlet of the evaporator 18 is provided with a third solenoid valve 3 and a second ethylene glycol pump 14 .
[0042] A ninth solenoid valve 9 is provided on the refrigerant circuit pipeline connecting the refrigerant inlet of the second river water heat exchanger 13 and the refrigerant outlet of the evaporator 18 .
[0043] A compressor 19 is provided on the refrigerant pipeline connected between the refrigerant outlet of the evaporator 18 and the refrigerant inlet of the condenser 21 .
[0044] An expansion valve 20 is provided on the refrigerant pipeline connecting the refrigerant outlet of the condenser 21 and the refrigerant inlet of the evaporator 18 .
[0045] A heating circulation loop is arranged between the heating water inlet pipeline and the heating water return pipeline.
[0046] An eleventh solenoid valve 17 is provided on the heating circulation loop.
[0047] Example 3 Based on Example 1 and Example 2, this embodiment provides a dual-source heat pump heating system using sensible heat or latent heat of a non-freezing river, wherein the river water heat exchanger includes a heat exchange shell 1201, a cold water inlet head 1202, a refrigerant inlet head 1203, a refrigerant outlet head 1204, a first heat exchange fin 1205, and a second heat exchange fin, wherein: The first heat exchange fins 1205 and the second heat exchange fins are alternately arranged in the heat exchange shell 1201, a plurality of cold water channels are arranged side by side in the inner cavity of the first heat exchange fins 1205, and a refrigerant channel with an S-shaped structure is arranged in the inner cavity of the second heat exchange fins.
[0048] The cold water channel is arranged in a vertical direction, and the refrigerant channel is arranged in a horizontal direction.
[0049] An upper cover plate is disposed on the top of the heat exchange shell 1201 , and a cold water inlet head 1202 is disposed on the upper cover plate. The cold water inlet head 1202 is connected to the water inlet of the cold water channel.
[0050] A lower cover plate is provided at the bottom of the heat exchange shell 1201, and a water outlet is opened on the lower cover plate. The water outlet is connected to the second river water return pipe; cold water flows from top to bottom in the cold water channel.
[0051] A refrigerant inlet head 1203 and a refrigerant outlet head 1204 are provided on the side wall of the heat exchange shell 1201. The refrigerant inlet head 1203 and the refrigerant outlet head 1204 are respectively arranged at the lowermost end and the uppermost end of the side of the heat exchange body, and are in close contact with the heat exchange body; the refrigerant inlet head 1203 is connected with the inlet end of the refrigerant channel, and the refrigerant outlet head 1204 is connected with the outlet end of the refrigerant channel. While ethylene glycol flows from bottom to top in the refrigerant channel, it performs countercurrent heat exchange with the cold water flowing from top to bottom through the partition 1205.
[0052] Example 4 Based on Example 1 and Example 2, this embodiment provides a dual-source heat pump heating method using sensible heat or latent heat of the Budong River, including the following steps: While freezing, the refrigerant circulates and heats the room: When the pressure value of the first pressure gauge 22 or the second pressure gauge 23 on the cold water pipeline is lower than the set value a, the corresponding first river water heat exchanger 12 or the second river water heat exchanger 13 performs heat exchange and freezing, wherein: like Figure 4 As shown, when the first river water heat exchanger 12 is frozen to provide heat and the second river water heat exchanger 13 is not working: 1) Open the second solenoid valve 2 on the cold water pipeline, the fourth solenoid valve 4 and the tenth solenoid valve 10 on the ethylene glycol pipeline, the compressor 19 and the expansion valve 20 on the refrigerant pipeline, open the eleventh solenoid valve 17, and close the sixth solenoid valve 6 and the seventh solenoid valve 7 on the deicing pipeline to cut off the deicing circuit; 2) The cold water of the non-freezing river enters the cold water pipeline and enters the cold water inlet of the first river water heat exchanger 12, flows from top to bottom, a part of it enters the atmosphere through the first river water heat exchanger 12, and the other part of it freezes in the first river water heat exchanger 12; 3) The ethylene glycol in the evaporator 18 enters the first river water heat exchanger 12, flows from bottom to top in the first river water heat exchanger 12, exchanges with the cold water entering it in countercurrent, flows out of the first river water heat exchanger 12 with increased temperature, and then enters the ethylene glycol supply pipeline and enters the evaporator 18 through the first ethylene glycol pump 15; 4) The ethylene glycol entering the evaporator 18 exchanges heat with the refrigerant in the evaporator 18, reduces its temperature, flows out of the evaporator 18, and flows into the first river water heat exchanger 12 for circulation; 5) The refrigerant in the evaporator 18 exchanges heat with ethylene glycol, is vaporized, sucked into the compressor 19, and discharged from the compressor 19 into the refrigerant channel in the condenser 21. After heat exchange with the heating water, the temperature is reduced and flows out of the condenser 21, and returns to the evaporator 18 through the expansion valve 20; 6) Since the eleventh solenoid valve 17 is opened, the heating circulating water enters the heating circulation loop from the heating return water pipeline, enters the condenser 21, exchanges heat with the refrigerant therein, flows out of the condenser 21 after the temperature rises, and returns to the heating system through the heating supply water pipeline to supply heat to users.
[0053] As Figure 5 shown, when the second river water heat exchanger 13 freezes for heating and the first river water heat exchanger 12 does not work: 1) Open the first solenoid valve 1 on the cold water pipeline, the third solenoid valve 3 and the ninth solenoid valve 9 on the ethylene glycol pipeline, the compressor 19 and the expansion valve 20 on the refrigerant pipeline, and open the eleventh solenoid valve 17; Close the fifth solenoid valve 5 and the eighth solenoid valve 8 to cut off the deicing circuit; 2) The cold water of the unfrozen river and unfrozen water enters the cold water pipeline, enters the second river water heat exchanger 13 from the cold water inlet thereof, flows downward, part of it enters the atmosphere through the second river water heat exchanger 13, and the other part freezes in the second river water heat exchanger 13; 3) The ethylene glycol flows upward in the second river water heat exchanger 13, exchanges heat countercurrently with the cold water entering it, flows out after the temperature rises, and enters the evaporator 18 through the second ethylene glycol pump 14; 4) The ethylene glycol entering the evaporator 18 exchanges heat with the refrigerant in the evaporator 18, flows out of the evaporator 18 after the temperature drops, and flows back into the second river water heat exchanger 13; 5) The refrigerant exchanges heat with the ethylene glycol in the ethylene glycol channel in the refrigerant channel of the evaporator 18, is vaporized and then sucked by the compressor 19, discharged from the compressor 20 and enters the refrigerant channel in the condenser 21, exchanges heat with the heating circulating water, flows out of the condenser 21 after the temperature drops, and returns to the evaporator 18 through the expansion valve 20; 6) Open the heating circulation loop, the heating circulating water enters the heating circulation loop from the heating return pipe, enters the circulating water channel of the condenser 21, exchanges heat with the refrigerant channel of the condenser 21, flows out of the condenser 21 after the temperature rises, and returns to the heating system through the heating supply water pipeline to supply heat to users.
[0054] Deicing and refrigerant circulation heat exchange for heating: During the deicing process, ethylene glycol circulates for heat exchange and heating. As the working time of the heat pump system increases, the pressure of the cold water pipeline continuously increases. When the pressure value of the first pressure gauge 22 or the second pressure gauge 23 is higher than the set value b (a < b), the corresponding first river water heat exchanger 12 or the second river water heat exchanger 13 needs to be deiced, where: As Figure 6 shown, when the first river water heat exchanger 12 is deiced and the second river water heat exchanger 13 supplies heat: 1) Close the second solenoid valve 2 to cut off the cold water pipeline of the first river water heat exchanger 12, close the fourth solenoid valve 4 and the tenth solenoid valve 10 to cut off the ethylene glycol pipeline of the first river water heat exchanger 12, and close the eleventh solenoid valve 17; Open the sixth solenoid valve 6 and the seventh solenoid valve 7 to open the deicing pipeline of the first river water heat exchanger 12; Close the fifth solenoid valve 5 and the eighth solenoid valve 8 to close the deicing pipeline of the second river water heat exchanger 13; 2) The heating circulating water enters the circulating water channel of the deicing heat exchanger 16 from the heating return pipe to cool down, and then enters the circulating water channel of the condenser 21 to heat up with the refrigerant channel of the condenser 21, and after the temperature is increased, it flows out of the condenser 21 and returns to the heating system through the heating water supply pipeline to provide heat for users; 3) The ethylene glycol flowing out of the first river water heat exchanger 12 enters the ethylene glycol channel of the deicing heat exchanger 16 through the first ethylene glycol pump 15 and the sixth solenoid valve 6, and heat exchanges with the heating circulating water entering the circulating water channel of the deicing heat exchanger 16 to increase the temperature. After the temperature is increased, it flows out of the deicing heat exchanger 16, enters the first river water heat exchanger 12 through the seventh solenoid valve 7, flows from bottom to top, and deices the first river water heat exchanger 12. The melted ice in the first river water heat exchanger 12 flows out from the outlet end of the river water pipeline; 4) After de-icing is completed, the second solenoid valve 2 is opened to open the cold water pipeline of the first river water heat exchanger 12, the fourth solenoid valve 4 and the tenth solenoid valve 10 are opened to open the ethylene glycol pipeline of the first river water heat exchanger 12, and the eleventh solenoid valve 17 is opened; Close the sixth solenoid valve 6 and the seventh solenoid valve 7 to cut off the deicing circuit of the first river water heat exchanger 12; 5) While the first river water heat exchanger 12 is de-iced, the second river water heat exchanger 13, the cold water pipeline of the second river water heat exchanger 13, the ethylene glycol pipeline of the second river water heat exchanger 13, the refrigerant pipeline of the second river water heat exchanger 13 and the heating circulation loop continue to work to provide heating for users.
[0055] like Figure 7 As shown, when the second river water heat exchanger 13 is de-iced and the first river water heat exchanger 12 is providing heat: 1) Close the first solenoid valve 1 to cut off the cold water pipeline of the second river water heat exchanger 13, close the third solenoid valve 3 and the ninth solenoid valve 9 to cut off the ethylene glycol pipeline of the second river water heat exchanger 13, and close the eleventh solenoid valve 17; Open the fifth solenoid valve 5 and the seventh solenoid valve 7 to open the deicing circuit of the second river water heat exchanger 13; 2) The heating circulating water enters the deicing heat exchanger 16 from the heating return water pipeline, passes through the circulating water channel of the deicing heat exchanger 16 to cool down, then enters the circulating water channel of the condenser 21, exchanges heat with the refrigerant channel of the condenser 21 to increase the temperature, flows out of the condenser 21 after the temperature is increased, and returns to the heating system through the heating water supply pipeline to provide heat for users; 3) The ethylene glycol flowing out of the second river water heat exchanger 13 enters the deicing circuit of the second river water heat exchanger 13 through the second ethylene glycol pump 14, enters the ethylene glycol channel of the deicing heat exchanger 16 through the second ethylene glycol pump 14 and the fifth solenoid valve 5, and heat exchanges with the heating circulating water entering the circulating water channel of the deicing heat exchanger 16 to increase the temperature. After the temperature is increased, it flows out of the deicing heat exchanger 16, enters the second river water heat exchanger 13 through the eighth solenoid valve 8, flows from bottom to top, de-ices the second river water heat exchanger 13, and the melted ice in the second river water heat exchanger 13 flows out from the outlet end of the river water pipeline; 4) After de-icing is completed, the first solenoid valve 1 is opened to open the cold water pipeline of the second river water heat exchanger 13, the third solenoid valve 3 and the ninth solenoid valve 9 are opened to open the ethylene glycol pipeline of the second river water heat exchanger 13, and the eleventh solenoid valve 17 is opened; Close the fifth solenoid valve 5 and the eighth solenoid valve 8 to cut off the deicing circuit of the second river water heat exchanger 13; 5) While the second river water heat exchanger 13 is being de-iced, the first river water heat exchanger 12, the cold water pipeline of the first river water heat exchanger 12, the ethylene glycol pipeline of the first river water heat exchanger 12, the refrigerant pipeline of the first river water heat exchanger 12 and the heating circulation loop continue to operate to provide heating for users.
[0056] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.
Claims
1. A dual-source heat pump heating system using sensible heat or latent heat from the Budong River, characterized in that: It includes the first river water heat exchanger, the second river water heat exchanger, the deicing heat exchanger and the heating water heat exchanger, among which: The river water inlets on the first river water heat exchanger and the second river water heat exchanger are connected to river water inlet pipes; The first river water heat exchanger and the second river water heat exchanger are both connected to the heating water heat exchanger through a refrigerant pipeline; The first river water heat exchanger and the second river water heat exchanger are both connected to the deicing heat exchanger through a deicing pipeline; The heating water heat exchanger is connected to a heating system via a deicing heat exchanger.
2. A dual-source heat pump heating system using sensible heat or latent heat from the Budong River according to claim 1, characterized in that: The first river water heat exchanger and the second river water heat exchanger are connected to the river water inlet pipeline through a cold water pipeline, and a solenoid valve and a pressure gauge are arranged on the cold water pipeline.
3. A dual-source heat pump heating system using sensible heat or latent heat from the Budong River according to claim 1, characterized in that: The refrigerant pipeline includes a refrigerant supply pipeline and a refrigerant loop pipeline, wherein both the refrigerant supply pipeline and the refrigerant loop pipeline are provided with solenoid valves.
4. A dual-source heat pump heating system using sensible heat or latent heat from the Budong River according to claim 1, characterized in that: The deicing pipeline comprises a deicing refrigerant supply pipeline and a deicing refrigerant loop pipeline, wherein both the deicing refrigerant supply pipeline and the deicing refrigerant loop pipeline are provided with solenoid valves.
5. A dual-source heat pump heating system using sensible heat or latent heat from the Budong River according to claim 1, characterized in that: The refrigerant outlets arranged on the first river water heat exchanger and the second river water heat exchanger are both provided with ethylene glycol pumps.
6. A dual-source heat pump heating system using sensible heat or latent heat from the Budong River according to claim 1, characterized in that: The river water heat exchanger comprises a heat exchange shell, a cold water inlet head, a refrigerant inlet head, a refrigerant outlet head, a first heat exchange fin and a second heat exchange fin, wherein: The first heat exchange fins and the second heat exchange fins are alternately arranged in the heat exchange shell, a plurality of cold water channels are arranged side by side in the inner cavity of the first heat exchange fins, and a refrigerant channel with an S-shaped structure is arranged in the inner cavity of the second heat exchange fins; The cold water channel is arranged in a vertical direction, and the refrigerant channel is arranged in a horizontal direction; An upper cover plate is provided on the top of the heat exchange shell, a cold water inlet seal head is provided on the upper cover plate, and the cold water inlet seal head is connected to the water inlet of the cold water channel; A lower cover plate is provided at the bottom of the heat exchange shell, a water outlet is provided on the lower cover plate, and the water outlet is connected to the second river water return pipe; A refrigerant inlet head and a refrigerant outlet head are arranged on the side wall of the heat exchange shell, and the refrigerant inlet head 1203 and the refrigerant outlet head are respectively arranged at the lower end and the upper end of the side of the heat exchange body; the refrigerant inlet head is connected to the inlet end of the refrigerant channel, and the refrigerant outlet head is connected to the outlet end of the refrigerant channel.
7. A dual-source heat pump heating system using sensible heat or latent heat from the Budong River according to claim 1, characterized in that: The heating water heat exchanger includes an evaporator and a condenser, wherein the refrigerant inlet and outlet arranged on the evaporator are respectively connected to the refrigerant outlet and inlet of the river water heat exchanger; the refrigerant inlet and outlet arranged on the evaporator are respectively connected to the refrigerant outlet and inlet arranged on the condenser; the circulating water inlet and outlet arranged on the condenser are respectively connected to the circulating water outlet and inlet of the heating system.
8. A dual-source heat pump heating method using sensible heat or latent heat from a non-freezing river, characterized in that: The heating system according to any one of claims 1 to 7 comprises the following steps: The pressures at the water inlets of the two river water heat exchangers are respectively obtained, wherein when the pressure value corresponding to the first river water heat exchanger or the second river water heat exchanger is less than the first set value, the corresponding first river water heat exchanger or the second river water heat exchanger is used for heating, and the second river water heat exchanger or the first river water heat exchanger is closed; When the pressure value corresponding to the first river water heat exchanger or the second river water heat exchanger is greater than or equal to the second set value, the second river water heat exchanger or the first river water heat exchanger is used for heating and the first river water heat exchanger or the second river water heat exchanger is de-iced.
9. A dual-source heat pump heating method using sensible heat or latent heat of the Budong River according to claim 8, characterized in that: The corresponding first river water heat exchanger or the second river water heat exchanger is used for heating, and the second river water heat exchanger or the first river water heat exchanger is closed. The specific method is: Close the second river water heat exchanger or the first river water heat exchanger, and close the de-icing heat exchanger; open the first river water heat exchanger or the second river water heat exchanger, and open the heating water heat exchanger; The cold water of the unfrozen river enters the first river water heat exchanger or the second river water heat exchanger to perform heat exchange with the refrigerant in the first river water heat exchanger or the second river water heat exchanger. A part of the cooled cold water freezes in the first river water heat exchanger or the second river water heat exchanger, and the other part is discharged from the first river water heat exchanger or the second river water heat exchanger. The heated refrigerant enters the heating water heat exchanger to exchange heat with the heating return water, and the cooled refrigerant returns to the first river water heat exchanger or the second river water heat exchanger; the heated heating return water enters the heating system to provide heating for users.
10. A dual-source heat pump heating method using sensible heat or latent heat of the Budong River according to claim 8, characterized in that: The second river water heat exchanger or the first river water heat exchanger is used for heating and the first river water heat exchanger or the second river water heat exchanger is de-iced. The specific method is: Close the first river water heat exchanger or the second river water heat exchanger, open the second river water heat exchanger or the first river water heat exchanger, and open the de-icing heat exchanger and the heating water heat exchanger; The cold water of the unfrozen river enters the second river water heat exchanger or the first river water heat exchanger to perform heat exchange with the refrigerant in the second river water heat exchanger or the first river water heat exchanger. A part of the cooled cold water freezes in the second river water heat exchanger or the first river water heat exchanger, and the other part is discharged from the second river water heat exchanger or the first river water heat exchanger. The heated refrigerant enters the heating water heat exchanger; The heating return water enters the de-icing heat exchanger to exchange heat with the refrigerant flowing out of the first river water heat exchanger or the second river water heat exchanger. The cooled heating return water enters the heating heat exchanger to exchange heat with the heated refrigerant flowing out of the second river water heat exchanger or the first river water heat exchanger. The cooled refrigerant flowing out of the heating heat exchanger enters the second river water heat exchanger or the first river water heat exchanger again. The heated heating circulating water enters the heating system to provide heating for users. The heated refrigerant flowing out of the deicing heat exchanger enters the first river water heat exchanger or the second river water heat exchanger to de-ice it.