Coupling heat exchange system

Abstract

The utility model discloses a coupling heat exchange system which comprises a heat exchanger. A water heater; a water outlet of the water heater communicates with an inlet of the user side, and an outlet of the user side and a water return port of the water heater are connected with the primary side of the heat exchanger to form a water circulation loop; an air source heat pump; the air source heat pump comprises a compressor, a condenser and an evaporator which are communicated in sequence; an outlet of the compressor and an inlet of the condenser are both connected with the secondary side of the heat exchanger to form a refrigerant circulation loop. The water heater and the air source heat pump are coupled through the heat exchanger, heat exchange is conducted on refrigerants in the refrigerant circulation loop in advance through low-temperature water flowing back to the water heater, the temperature of the refrigerants entering the condenser is reduced, meanwhile, heat exchange can be conducted on water in the water circulation loop through high-temperature refrigerants flowing out of the compressor, and the heat exchange efficiency is improved. Therefore, energy of the air source heat pump is utilized while the refrigeration efficiency of the air source heat pump is improved, and the energy consumption of the water heater is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of heat exchange systems, and in particular to a coupled heat exchange system. Background Art

[0002] For most users, traditional technologies for cooling, heating, and domestic hot water use water boilers to provide domestic hot water, while air-source heat pumps provide both cooling and heating. In existing technologies, air-source heat pumps consist of a compressor, condenser, and evaporator. Refrigerant flows from the compressor into the condenser and then into the evaporator, generating cooling. During cooling, the air-source heat pump dissipates heat through the condenser and fan. This heat requires electrical power to dissipate, which is not energy-efficient and increases energy consumption. Water boiler insulation primarily relies on the energy consumed to power the boiler (especially in zero-cold-water mode), resulting in very high energy consumption.

[0003] Therefore, the existing technology still needs to be improved and developed. Utility Model Content

[0004] The technical problem to be solved by this application is to provide a coupled heat exchange system to address the above-mentioned defects of the prior art, aiming to improve the cooling efficiency of the air source heat pump while utilizing the energy of the air source heat pump to reduce the energy consumption of the water heater.

[0005] The technical solutions adopted by this application to solve the technical problems are as follows:

[0006] A coupled heat exchange system, comprising:

[0007] heat exchangers;

[0008] A water heater; the water outlet of the water heater is connected to the inlet of the user end, and the outlet of the user end and the return water inlet of the water heater are both connected to the primary side of the heat exchanger to form a water circulation loop;

[0009] An air source heat pump; the air source heat pump comprises a compressor, a condenser and an evaporator connected in sequence; the outlet of the compressor and the inlet of the condenser are both connected to the secondary side of the heat exchanger to form a refrigerant circulation loop.

[0010] The coupled heat exchange system, wherein the heat exchanger is a shell-and-tube heat exchanger.

[0011] The coupled heat exchange system further comprises:

[0012] Three-way valve; the inlet valve of the three-way valve is connected to the outlet of the user end, the first outlet valve of the three-way valve is connected to the primary side of the heat exchanger, and the second outlet valve of the three-way valve is connected to the return water port of the water heater.

[0013] The coupled heat exchange system further comprises:

[0014] The water pump is arranged between the inlet valve of the three-way valve and the outlet at the user end.

[0015] The coupled heat exchange system, wherein the air source heat pump further comprises:

[0016] A four-way valve located in the refrigerant circulation circuit;

[0017] The four-way valve is arranged between the inlet of the condenser and the heat exchanger, and is connected to the reflux port of the compressor and the evaporator respectively.

[0018] The coupled heat exchange system further comprises:

[0019] The auxiliary temperature regulating device is located indoors and is arranged on the secondary side of the evaporator.

[0020] The coupled heat exchange system, wherein the auxiliary temperature control device includes:

[0021] A storage box; the storage box is provided with an air inlet and an air outlet;

[0022] The coil has both ends connected to the secondary side of the evaporator to form a circulation loop;

[0023] At least one first fan is disposed in the receiving box and arranged upstream of the coil along the airflow direction in the receiving box.

[0024] The coupled heat exchange system, wherein the auxiliary temperature control device further comprises:

[0025] A filter is arranged at the air inlet;

[0026] The water receiving tray is arranged in the receiving box and is located below the coil.

[0027] The coupled heat exchange system, wherein the air source heat pump further comprises:

[0028] At least one second fan is arranged on one side of the condenser.

[0029] The coupled heat exchange system, wherein the water heater is a gas water heater or an electric water heater.

[0030] Beneficial effect: In the present application, the water heater and the air source heat pump are coupled through the heat exchanger, so that the refrigerant in the refrigerant circulation loop is pre-heated by the low-temperature water returning to the water heater, thereby reducing the temperature of the refrigerant entering the condenser, thereby reducing the burden on the condenser, and there is no need to reduce the refrigerant from an extremely high temperature to the condensation temperature, reducing the workload of the condenser. The condenser can complete the cooling and condensation process more efficiently, reducing or even avoiding the scaling and material fatigue of the condenser, thereby achieving the purpose of improving the cooling efficiency of the air source heat pump.

[0031] At the same time, in the refrigerant circulation loop, the high-temperature refrigerant flowing out of the compressor can exchange heat with the water in the water circulation loop, so that the water is preheated before flowing back to the water heater. When the water heater heats the water, the basic temperature of the water is increased, thereby improving the working efficiency of the water heater and reducing the energy consumption of the water heater. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a schematic structural diagram of the coupled heat exchange system described in this application;

[0033] Figure 2 It is a structural diagram of the auxiliary temperature control equipment described in this application. DETAILED DESCRIPTION

[0034] It will be understood by those skilled in the art that, unless expressly stated otherwise, the singular forms "a", "an", "said" and "the" used herein may also include the plural forms. It should be further understood that the term "comprising" used in the specification of the present application refers to the presence of the features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof. It should be understood that when we refer to an element as being "connected" or "coupled" to another element, it may be directly connected or coupled to the other element, or there may be intermediate elements. In addition, "connected" or "coupled" as used herein may include wireless connections or wireless couplings. The term "and / or" used herein includes all or any units and all combinations of one or more associated listed items.

[0035] It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs. It should also be understood that terms such as those defined in common dictionaries should be understood to have meanings consistent with their meanings in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless specifically defined as herein.

[0036] The present application provides a coupled heat exchange system, such as Figure 1 As shown, the coupled heat exchange system includes a heat exchanger 1, a water heater 2 and an air source heat pump 3; the water outlet of the water heater 2 is connected to the inlet of the user end 10, and the outlet of the user end 10 and the return water outlet of the water heater 2 are both connected to the primary side of the heat exchanger 1 to form a water circulation loop 100; the air source heat pump 3 includes a compressor 31, a condenser 32 and an evaporator 33 connected in sequence; the outlet of the compressor 31 and the inlet of the condenser 32 are both connected to the secondary side of the heat exchanger 1 to form a refrigerant circulation loop 200.

[0037] The water heater 2 and the air source heat pump 3 are coupled through the heat exchanger 1, so that the refrigerant in the refrigerant circulation loop 200 is pre-heated by the low-temperature water returning to the water heater 2, thereby reducing the temperature of the refrigerant entering the condenser 32, thereby reducing the burden on the condenser 32. There is no need to reduce the refrigerant from an extremely high temperature to the condensation temperature, reducing the workload of the condenser 32, and the condenser 32 can complete the cooling and condensation process more efficiently, reducing or even avoiding the scaling and material fatigue of the condenser 32, thereby achieving the purpose of improving the cooling efficiency of the air source heat pump 3.

[0038] At the same time, in the refrigerant circulation loop 200, the high-temperature refrigerant flowing out from the compressor 31 can exchange heat with the water in the water circulation loop 100, so that the water is preheated before flowing back to the water heater 2. When the water heater 2 heats the water, the basic temperature of the water is increased, thereby improving the working efficiency of the water heater 2 and reducing the energy consumption of the water heater 2.

[0039] Specifically, the primary side of the heat exchanger 1 constitutes the water circulation loop 100, and the secondary side of the heat exchanger 1 constitutes the refrigerant circulation loop 200. In the water circulation loop 100, the water outlet of the water heater 2 is connected to the inlet of the user end 10, the outlet of the user end 10 is connected to the inlet of the primary side of the heat exchanger 1, and the outlet of the primary side of the heat exchanger 1 is connected to the return water inlet of the water heater 2; that is, the water discharged from the outlet of the user end 10 passes through the heat exchanger 1 and then flows back into the water heater 2, thereby exchanging heat with the secondary side of the heat exchanger 1.

[0040] In the refrigerant circulation loop 200, the outlet of the compressor 31 is connected to the inlet of the secondary side of the heat exchanger 1, the outlet of the secondary side of the heat exchanger 1 is connected to the inlet of the condenser 32, the outlet of the condenser 32 is connected to the inlet of the evaporator 33, and the outlet of the evaporator 33 is connected to the return port of the compressor 31; then, the high-temperature refrigerant flowing out of the compressor 31 can be heat exchanged with the water circulation loop 100 on the primary side of the heat exchanger 1 in the heat exchanger 1, and after being pre-cooled, it flows into the condenser 32 and then circulates in the air source heat pump 3.

[0041] The coupled heat exchange system also includes a three-way valve 4; the inlet valve of the three-way valve 4 is connected to the outlet of the user end 10, the first outlet valve of the three-way valve 4 is connected to the primary side of the heat exchanger 1, and the second outlet valve of the three-way valve 4 is connected to the return water port of the water heater 2.

[0042] Specifically, the outlet of the primary side of the heat exchanger 1 is connected to the return water port of the water heater 2; the three-way valve 4 is used to control the connection between the outlet of the user end 10 and the inlet of the heat exchanger 1, and between the outlet of the user end 10 and the return water port of the water heater 2; then, when the inlet valve of the three-way valve 4 is connected to the first outlet valve, the outlet of the user end 10 is connected to the return water port of the water heater 2 through the primary side of the heat exchanger 1, so that the water that flows back after use at the user end 10 enters the water heater 2. The water heater 2 can be pre-heated with the refrigerant circulation circuit 200 through the heat exchanger 1 before use; when the inlet valve of the three-way valve 4 is connected to the second outlet valve, the connection line between the outlet of the user end 10 and the primary side of the heat exchanger 1 is cut off, and the outlet of the user end 10 is directly connected to the return water port of the water heater 2, so that the water that flows back after use through the user end 10 directly flows back into the water heater 2 without passing through the heat exchanger 1, and cannot be pre-heated with the refrigerant circulation circuit 200.

[0043] Therefore, when the temperature of the water flowing back through the user end 10 after use is high enough and there is no need to heat the water flowing back into the water heater 2 through the heat exchanger 1, the three-way valve 4 can be adjusted to connect the inlet valve and the second outlet valve, and disconnect the inlet valve and the first outlet valve. When the temperature of the water flowing back through the user end 10 after use is low, the three-way valve 4 can be adjusted to connect the inlet valve and the first outlet valve, and disconnect the inlet valve and the second outlet valve.

[0044] In one embodiment of the present application, the coupled heat exchange system further includes a water pump 5 , which is disposed between the inlet valve of the three-way valve 4 and the outlet of the user end 10 .

[0045] Specifically, the water pump 5 is arranged upstream of the three-way valve 4 and downstream of the user end 10 along the water flow direction of the water circulation loop 100. The effective heat exchange of the heat exchanger 1 depends on the flow of citizen water at the user end 10; if the water flow is insufficient, the heat exchange effect of the heat exchanger 1 will be greatly reduced. Therefore, by driving the water pump 5, the citizen water can maintain a stable flow rate, thereby ensuring that heat can be smoothly transferred to the water use system. When the inlet valve is connected to the first outlet valve, the water pump 5 can also increase the water flow rate in the heat exchanger 1. The increase in the water flow rate helps to enhance the turbulence inside the heat exchanger 1, avoid uneven heat exchange caused by slow local water flow, and thus improve the heat exchange efficiency of the entire system.

[0046] At the same time, the water pump 5 can also help eliminate gas accumulation in the water circulation loop 100; specifically, in the water circulation loop 100, gas may cause water flow interruption or hinder water flow, and the water pump 5 can provide sufficient power to push the water flow, overcome gas resistance, and ensure smooth fluid circulation of the heat exchanger 1 and the entire system.

[0047] In one embodiment of the present application, the air source heat pump 3 also includes a four-way valve 34; the four-way valve 34 is located in the refrigerant circulation loop 200; the four-way valve 34 is arranged between the inlet of the condenser 32 and the heat exchanger 1, and is respectively connected to the reflux port of the compressor 31 and the evaporator 33.

[0048] Specifically, the four valves of the four-way valve 34 are respectively connected to the return port of the compressor 31, the outlet of the secondary side of the heat exchanger 1, the evaporator 33 and the condenser 32, and are used to adjust the flow direction of the refrigerant in the refrigerant circulation circuit 200. When the refrigerant flows out of the compressor 31 and passes through the heat exchanger 1, under the conduction effect of the four-way valve 34, the refrigerant passes through the condenser 32 and the evaporator 33 in sequence, and then flows back to the compressor 31, and the air source heat pump 3 is used for cooling. Conversely, when the refrigerant flows out of the compressor 31, first passes through the evaporator 33, then passes through the condenser 32, and finally flows back to the compressor 31, the air source heat pump 3 is used for heating.

[0049] The coupled heat exchange system further includes an auxiliary temperature control device 6, which is located indoors and is arranged on the secondary side of the evaporator 33. Figure 1 and Figure 2As shown, the auxiliary temperature control device 6 includes a storage box 61, a coil 62 and at least one first fan 63; the storage box 61 is provided with an air inlet and an air outlet; both ends of the coil 62 are connected to the secondary side of the evaporator 33 to form a circulation loop; the first fan 63 is arranged in the storage box 61 and is arranged upstream of the coil 62 along the air flow direction in the storage box 61.

[0050] Specifically, the refrigerant circulation loop 200 is located on the primary side of the evaporator 33, and the auxiliary temperature control device 6 is located on the secondary side of the evaporator 33. Then, while the evaporator 33 is normally used to provide cooling for the air source heat pump 3, it can also be used as a heat exchanger, so that the refrigerant in the refrigerant circulation loop 200 exchanges heat with the water circulating in the auxiliary temperature control device 6, thereby playing an auxiliary temperature control role in the room and improving the indoor cooling effect.

[0051] One end of the coil 62 is connected to the inlet of the secondary side of the evaporator 33, and the other end of the coil 62 is connected to the outlet of the secondary side of the evaporator 33. When the air source heat pump 3 is cooling, the evaporator 33 absorbs heat through the evaporation of the refrigerant, thereby reducing the ambient temperature. Through the connection between the secondary side of the evaporator 33 and the auxiliary temperature control device 6, the water on the secondary side of the evaporator 33 exchanges heat within the evaporator 33 and transfers the cold energy to the coil 62, thereby cooling the coil 62. Therefore, when the first fan 63 is turned on, the fan accelerates the heat exchange rate between the indoor air and the coil 62 by forcing air flow. The indoor air passes through the low-temperature surface of the coil 62, which can quickly transfer the cold energy of the low-temperature coil 62 to the indoor room, thereby quickly absorbing the heat of the indoor hot air, reducing the air temperature, and further improving the heat exchange efficiency.

[0052] In one embodiment of the present application, the auxiliary temperature control device 6 further includes a filter; the filter is arranged at the air inlet.

[0053] Because the water flowing within the coil 62 has been cooled by heat exchange, condensation easily forms on the outer surface of the coil 62 over time. Under the influence of the condensation on the outer surface of the coil 62, dust and other particles carried in the air within the storage box 61 can easily adhere to the outer surface of the coil 62, thereby reducing heat exchange efficiency. Therefore, in this embodiment, a filter is provided at the air inlet. When the first fan 63 is turned on, air is filtered by the filter before entering the storage box 61, reducing the accumulation of dust and other particles on the outer surface of the coil 62 and ensuring the heat exchange efficiency of the auxiliary temperature control device 6.

[0054] In one embodiment of this application, Figure 2 As shown, the auxiliary temperature control device 6 further includes a water receiving tray 64 , which is disposed in the receiving box 61 and below the coil 62 .

[0055] Specifically, since the water flowing in the coil 62 is water that has undergone heat exchange and cooling, condensed water is likely to form on the outer surface of the coil 62 after a long period of use; therefore, the water receiving pan 64 is provided below the coil 62, and the water receiving pan 64 can receive the condensed water formed on the coil 62 to prevent the condensed water from accumulating directly in the storage box 61.

[0056] It is understood that the storage box 61 has an openable and closable replacement port, so the water receiving pan 64 can be removed from the storage box 61 by opening the replacement port and cleaned. A drain pipe can also be inserted into the storage box 61, with one end of the drain pipe extending into the water receiving pan 64 and the other end extending to the outside, thereby draining the condensed water in the water receiving pan 64.

[0057] In one embodiment of the present application, the air source heat pump 3 further includes at least one second fan 35 , and the second fan 35 is arranged on one side of the condenser 32 .

[0058] Specifically, the second fan 35 is arranged opposite to the condenser 32, so that the condenser 32 can be located in the air supply area of ​​the second fan 35. The second fan 35 accelerates the air flow through the heat sink of the condenser 32 by blowing air, quickly taking away the heat released by the refrigerant, thereby cooling the refrigerant more effectively, shortening the time for the refrigerant in the refrigerant circulation loop 200 to condense in the condenser 32, and improving the condensation efficiency.

[0059] In one embodiment of the present application, the water heater 2 is a gas water heater 2 or an electric water heater 2, so that energy is provided to the water heater 2 by natural gas or city electricity.

[0060] In one embodiment of the present application, the heat exchanger 1 is a shell-and-tube heat exchanger. The shell-and-tube heat exchanger used in the present application for heat exchange between the water circulation loop 100 and the refrigerant circulation loop 200 provides a larger contact area and higher heat exchange efficiency, which facilitates efficient heat transfer between the air source heat pump 3 and the water heater 2. The shell-and-tube heat exchanger has a compact structure and a short heat conduction distance between the two fluids, which can effectively reduce heat loss during heat transfer. The shell-and-tube heat exchanger can also maintain the temperature stability of the hot water flow. Even if the temperature difference between the fluids on both sides is large, the shell-and-tube heat exchanger can control the fluid flow rate through its structure to ensure stable temperature output.

[0061] In summary, the present application provides a coupled heat exchange system, which includes: a heat exchanger; a water heater; the water outlet of the water heater is connected to the inlet of the user end, and the outlet of the user end and the return water outlet of the water heater are both connected to the primary side of the heat exchanger to form a water circulation loop; an air source heat pump; the air source heat pump includes a compressor, a condenser and an evaporator connected in sequence; the outlet of the compressor and the inlet of the condenser are both connected to the secondary side of the heat exchanger to form a refrigerant circulation loop. In the present application, the water heater and the air source heat pump are coupled through the heat exchanger, so that the refrigerant in the refrigerant circulation loop is pre-heated by the low-temperature water returning to the water heater, thereby reducing the temperature of the refrigerant entering the condenser, reducing the burden on the condenser, and not needing to cool the refrigerant from an extremely high temperature to the condensing temperature, reducing the workload of the condenser, so that the condenser can complete the cooling and condensing process more efficiently, reducing or even avoiding the phenomenon of scaling and material fatigue in the condenser, thereby achieving the purpose of improving the cooling efficiency of the air source heat pump. At the same time, in the refrigerant circulation loop, the high-temperature refrigerant flowing out of the compressor can exchange heat with the water in the water circulation loop, so that the water is preheated before flowing back to the water heater. When the water heater heats the water, the basic temperature of the water is increased, thereby improving the working efficiency of the water heater and reducing the energy consumption of the water heater.

[0062] It should be understood that the application of this application is not limited to the above examples. For ordinary technicians in this field, they can make improvements or changes based on the above description. All these improvements and changes should fall within the scope of protection of the claims attached to this application.

Claims

1. A coupled heat exchange system, characterized in that: It includes: heat exchangers; water heaters; The water outlet of the water heater is connected to the inlet of the user end, and the outlet of the user end and the return water inlet of the water heater are both connected to the primary side of the heat exchanger to form a water circulation loop; An air source heat pump; the air source heat pump comprises a compressor, a condenser and an evaporator connected in sequence; the outlet of the compressor and the inlet of the condenser are both connected to the secondary side of the heat exchanger to form a refrigerant circulation loop.

2. The coupled heat exchange system according to claim 1, characterized in that: The heat exchanger is a shell and tube heat exchanger.

3. The coupled heat exchange system according to claim 1, characterized in that: It also includes: Three-way valve; the inlet valve of the three-way valve is connected to the outlet of the user end, the first outlet valve of the three-way valve is connected to the primary side of the heat exchanger, and the second outlet valve of the three-way valve is connected to the return water port of the water heater.

4. The coupled heat exchange system according to claim 3, characterized in that: It also includes: The water pump is arranged between the inlet valve of the three-way valve and the outlet at the user end.

5. The coupled heat exchange system according to claim 1, characterized in that: The air source heat pump further comprises: A four-way valve located in the refrigerant circulation circuit; The four-way valve is arranged between the inlet of the condenser and the heat exchanger, and is connected to the reflux port of the compressor and the evaporator respectively.

6. The coupled heat exchange system according to claim 1, characterized in that: It also includes: The auxiliary temperature regulating device is located indoors and is arranged on the secondary side of the evaporator.

7. The coupled heat exchange system according to claim 6, characterized in that: The auxiliary temperature adjustment equipment includes: A storage box; the storage box is provided with an air inlet and an air outlet; The coil has both ends connected to the secondary side of the evaporator to form a circulation loop; At least one first fan is disposed in the receiving box and arranged upstream of the coil along the airflow direction in the receiving box.

8. The coupled heat exchange system according to claim 7, characterized in that: The auxiliary temperature adjustment device also includes: A filter is provided at the air inlet; The water receiving tray is arranged in the receiving box and is located below the coil.

9. The coupled heat exchange system according to claim 1, characterized in that: The air source heat pump further comprises: At least one second fan is arranged on one side of the condenser.

10. The coupled heat exchange system according to claim 1, characterized in that: The water heater is a gas water heater or an electric water heater.

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