A dual-temperature water heat exchange station and heat exchange system for centralized heat sources

Abstract

This utility model discloses a dual-temperature water outlet heat exchange station and heat exchange system for a centralized heat source, including an inlet valve, a return valve, a mixing valve, a water pump, a three-way valve, a heat exchanger, a heating inlet, a heating return outlet, a bathroom outlet, a bathroom inlet, a first medium inlet, and a first medium return outlet. The heat exchange station has heating and bathroom modes. In heating mode, the first medium inlet, inlet valve, mixing valve, and heating inlet are connected to form a first flow path for the first medium, and the heating return outlet, water pump, return valve, and first medium return outlet are connected to form a second flow path for the first medium. In bathroom mode, the first medium inlet, inlet valve, mixing valve, heat exchanger, water pump, return valve, and first medium return outlet are connected to form a third flow path for the first medium, and the bathroom inlet, heat exchanger, and bathroom outlet are connected to form a second medium flow path. The three-way valve allows the mixing valve to switch between the heating inlet and the heat exchanger. This utility model reduces the number of parts and pipes, has a simple structure, and low cost.

Description

Technical Field

[0001] This utility model relates to the field of heat exchange stations, and more specifically, to a dual-temperature water outlet heat exchange station and heat exchange system for a centralized heat source. Background Technology

[0002] Application publication number CN113719888A discloses a centralized heat source heating and sanitary water control center, which has many components, complex pipelines, and high overall cost. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a dual-temperature water heat exchange station and heat exchange system for centralized heat sources, which reduces the number of parts and pipelines, has a simple structure, and low cost.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A dual-temperature water-outlet heat exchange station for a centralized heat source includes an inlet valve, a return valve, a mixing valve, a water pump, a three-way valve, a heat exchanger, a heating inlet, a heating return outlet, a bathroom outlet, a bathroom inlet, a first medium inlet, and a first medium return outlet. The inlet valve includes a first port and a second port; the return valve includes a first port and a third port; the mixing valve includes a first port, a second port, and a third port; and the heat exchanger includes a first interface, a second interface, a third interface, and a fourth interface. The first and second interfaces are connected, and the third and fourth interfaces are connected. The heat exchange station has a heating operation mode and a bathroom operation mode. In the heating operation mode, the first medium inlet, the first port of the inlet valve, the second port of the inlet valve, the first port of the mixing valve, the second port of the mixing valve, and the heating inlet are connected to form a first medium outlet. The flow path is as follows: the heating return port, water pump, third port of return water valve, first port of return water valve, and first medium return port are connected to form a second flow path for the first medium. The outlet of the water pump is connected to the third port of the mixing valve. The third port and first port of the mixing valve are both inlet ends of the first medium. The second port of the mixing valve is the outlet end of the first medium. When the bathroom is in operation, the first medium inlet, first port of inlet valve, second port of inlet valve, first port of mixing valve, second port of mixing valve, first interface, second interface, water pump, third port of return water valve, first port of return water valve, and first medium return port are connected to form a third flow path for the first medium. The bathroom inlet, fourth interface, third interface, and bathroom outlet are connected to form a flow path for the second medium. The three-way valve is located in the first or second flow path, and the second port of the mixing valve is switched with the heating inlet and the first interface through the three-way valve.

[0006] As a further configuration, the three-way valve is located in the first flow path. The three-way valve includes a first port, a second port, and a third port. The second port of the mixing valve is connected to the second port of the three-way valve. The first port of the three-way valve is connected to the heating inlet. The third port of the three-way valve is connected to the first interface. In the heating operation state, the first port and the second port of the three-way valve are connected. In the bathroom operation state, the second port and the third port of the three-way valve are connected. The second port of the three-way valve is the inlet end of the first medium, and the first port and the third port of the three-way valve are the outlet ends of the first medium.

[0007] As a further configuration, the three-way valve is located in the second flow path. The three-way valve includes a first port, a second port, and a third port. The second port is connected to the inlet of the water pump, the first port is connected to the heating return port, and the third port is connected to the second interface. In the heating operation state, the first and second ports are connected. In the bathroom operation state, the second and third ports are connected. The first and third ports are the inlet of the first medium, and the second port is the outlet of the first medium.

[0008] As a further configuration, the inlet valve also includes a third inlet valve port, and the return valve also includes a second return valve port. The third inlet valve port is connected to the second return valve port via a bypass. The first medium inlet, the first inlet valve port, the third inlet valve port, the bypass, the second return valve port, the first return valve port, and the first medium return port are connected to form a fourth flow path for the first medium. The bypass is unidirectional and has an opening pressure. The first inlet valve port is the inlet end of the first medium, the second and third inlet valve ports are the outlet ends of the first medium, the second and third return valve ports are the inlet ends of the first medium, and the first return valve port is the outlet end of the first medium.

[0009] As a further configuration, the heating operation states include a first heating state and a second heating state. The temperature of the first medium in the first heating state is higher than that of the first medium in the second heating state. The mixing valve is an electric regulating valve, and the flow rate of the first medium entering from the third port of the mixing valve is adjustable.

[0010] As a further feature, the first medium and the second medium in the third flow path complete heat exchange in the heat exchanger.

[0011] As a further feature, the water pump is a variable frequency water pump.

[0012] As a further feature, the heating inlet, heating return outlet, bathroom outlet, bathroom inlet, first medium inlet, and first medium return outlet are all exposed at the heat exchange station.

[0013] As a further configuration, the inlet valve, bypass valve, and return valve form an inlet valve group, wherein the first port of the inlet valve and the first medium inlet are the same port, and the first port of the return valve and the first medium return port are the same port.

[0014] A heat exchange system includes a water tank and a dual-temperature water heat exchange station for a centralized heat source. The water tank includes a water tank outlet and a water tank return outlet. The water tank outlet is connected to a first medium inlet, and the water tank return outlet is connected to a first medium return outlet.

[0015] In summary, this utility model has the following beneficial effects:

[0016] First, a three-way valve is used to replace one stepper motor (where the second heat exchanger is located) and one servo motor (where the first heat exchanger is located) in the water control center of the background technology. This reduces the number of parts and pipelines, simplifies the structure, and lowers the cost.

[0017] Second, since total heat capacity = specific heat coefficient × temperature difference × flow rate, in the prior art, for the primary side (i.e., the heat source side of the plate heat exchanger), the temperature difference is the inlet temperature minus the outlet temperature, and the temperature difference remains constant. The primary side (including the primary side of plate heat exchanger 1 and plate heat exchanger 2) adjusts the total heat capacity by regulating the flow rate through a motor. This is a case of primary side flow rate regulation controlling secondary side temperature regulation. A high temperature on the primary side of the plate heat exchanger makes it prone to scaling. However, this application controls the bathroom temperature by adjusting the temperature through a mixing valve. With a constant flow rate, the inlet temperature on the primary side decreases. This is a case of primary side temperature regulation controlling secondary side temperature regulation. The primary side temperature is lower than in the prior art, making the heat exchanger less prone to scaling.

[0018] Third, the use of a variable frequency water pump allows for adjustable flow. By using a mixing valve in conjunction with the variable frequency water pump, both flow and temperature can be adjusted, ensuring a wider range of adjustment for the bathroom water temperature. In summer, if the bathroom water temperature is too high and the temperature is still too high after mixing, the flow can be reduced by using the variable frequency water pump. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the heating operation in Example 1.

[0020] Figure 2 This is a schematic diagram of the bathroom operation in Example 1.

[0021] Figure 3 This is a schematic diagram of the heating operation in Example 2.

[0022] Figure 4 This is a schematic diagram of the bathroom operation in Example 2.

[0023] Reference numerals: 1. Inlet valve; 11. First port of inlet valve; 12. Second port of inlet valve; 13. Third port of inlet valve; 2. Bypass valve; 3. Return valve; 31. First port of return valve; 32. Second port of return valve; 33. Third port of return valve; 4. Mixing valve; 41. First port of mixing valve; 42. Second port of mixing valve; 43. Third port of mixing valve; 5. Water pump; 6. Three-way valve; 61. First port of three-way valve; 62. Second port of three-way valve; 63. Third port of three-way valve; 7. Heat exchanger; 71. First interface; 72. Second interface; 73. Third interface; 74. Fourth interface; 8. Water tank; 81. Water tank outlet; 82. Water tank return outlet; 91. Heating inlet; 92. Heating return outlet; 93. Bathroom outlet; 94. Bathroom inlet; 95. First medium inlet; 96. First medium return outlet. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example 1:

[0026] Reference Figure 1 , Figure 2 As shown, a dual-temperature water heat exchange station for a centralized heat source includes an inlet valve 1, a bypass 2, a return valve 3, a mixing valve 4, a water pump 5, a three-way valve 6, a heat exchanger 7, a heating inlet 91, a heating return outlet 92, a bathroom outlet 93, a bathroom inlet 94, a first medium inlet 95, and a first medium return outlet 96. Figure 1 and Figure 2 The area enclosed by the dotted box is the heat exchange station. Heating inlet 91, heating return outlet 92, bathroom outlet 93, bathroom inlet 94, first medium inlet 95, and first medium return outlet 96 are all exposed within the heat exchange station. First medium inlet 95 and first medium return outlet 96 can be connected to an external heat source (water tank 8), which provides the first medium (usually hot water). Heating inlet 91 and heating return outlet 92 can be connected to underfloor heating pipes and radiator pipes. Bathroom outlet 93 and bathroom inlet 94 can be connected to bathroom water pipes.

[0027] The inlet valve 1, bypass valve 2, and return valve 3 form an inlet valve group, that is, the three are integrated together. At this time, the first port 11 of the inlet valve and the first medium inlet 95 are the same port, and the first port 31 of the return valve and the first medium return port 96 are the same port.

[0028] The inlet valve 1 includes an inlet valve first port 11, an inlet valve second port 12, and an inlet valve third port 13. The return valve 3 includes a return valve first port 31, a return valve second port 32, and a return valve third port 33. The inlet valve third port 13 is connected to the return valve second port 32 through a bypass 2. The bypass 2 is unidirectional, meaning that the first medium can only flow from the inlet valve third port 13 to the return valve second port 32. The inlet valve first port 11 is the inlet end of the first medium, and the inlet valve second port 12 and the inlet valve third port 13 are the outlet ends of the first medium. That is, the first medium enters from the inlet valve first port 11 and exits from the inlet valve second port 12 and the inlet valve third port 13. The return valve second port 32 and the return valve third port 33 are the inlet ends of the first medium, and the return valve first port 31 is the outlet end of the first medium. The first medium inlet 95, the first port 11 of the inlet valve, the third port 13 of the inlet valve, bypass 2, the second port 32 of the return valve, the first port 31 of the return valve, and the first medium return port 96 are connected to form the fourth flow path of the first medium. The bypass 2 is set with an opening pressure. When the pressure of the external heat source exceeds the set pressure, the bypass 2 opens, and part of the first medium flows back to the external heat source from the third port 13 of the inlet valve, bypass 2, and the second port 32 of the return valve. The bypass 2 is a prior art technique.

[0029] The mixing valve 4 includes a first port 41, a second port 42, and a third port 43. The third port 43 and the first port 41 are both inlet ports for the first medium, and the second port 42 is the outlet port for the first medium. The mixing valve 4 is an electric regulating valve, and the flow rate of the first medium entering through the third port 43 is adjustable.

[0030] The three-way valve 6 includes a first port 61, a second port 62, and a third port 63. The first port 61 and the third port 63 are the inlet ends of the first medium, and the second port 62 is the outlet end of the first medium.

[0031] The heat exchanger 7 includes a first interface 71, a second interface 72, a third interface 73 and a fourth interface 74, wherein the first interface 71 and the second interface 72 are connected, and the third interface 73 and the fourth interface 74 are connected.

[0032] The heat exchange station has both heating and bathroom operation modes, which are switched via a three-way valve 6. Figure 1As shown, in the heating operation state, the first medium inlet 95, the first port 11 of the inlet valve, the second port 12 of the inlet valve, the first port 41 of the mixing valve, the second port 42 of the mixing valve, and the heating inlet 91 are connected to form the first flow path of the first medium. The heating return port 92, the first port 61 of the three-way valve, the second port 62 of the three-way valve, the water pump 5, the third port 33 of the return valve, the first port 31 of the return valve, and the first medium return port 96 are connected to form the second flow path of the first medium. At this time, the three-way valve 6 is located in the second flow path. The second port 62 of the three-way valve is connected to the inlet end of the water pump 5, the first port 61 of the three-way valve is connected to the heating return port 92, and the third port 63 of the three-way valve is connected to the second interface 72. At this time, the first port 61 and the second port 62 of the three-way valve are connected, but the second port 62 and the third port 63 of the three-way valve are not connected. The outlet of the water pump 5 is connected to the third port 43 of the mixing valve. This heat exchange station is self-powered.

[0033] The first medium provided by the external heat source enters the first flow path through the first medium inlet 95. The first medium in the first flow path enters the radiator pipes and underfloor heating pipes. After passing through the radiator pipes and underfloor heating pipes, the first medium enters the second flow path. Finally, the first medium in the second flow path flows back to the external heat source through the first medium return outlet 96. The first medium is used in a cyclical manner throughout the heating process. The temperature of the first medium decreases after passing through the radiator pipes and underfloor heating pipes. Therefore, the first medium before entering the radiator pipes and underfloor heating pipes is marked in red, and the first medium after passing through the radiator pipes and underfloor heating pipes is marked in blue. The temperature of the red first medium is higher than that of the blue first medium.

[0034] The heating system operates in two states: a first heating state and a second heating state. In the first heating state, the temperature of the first medium is higher than that in the second heating state. The first heating state can supply heat to radiator pipes, while the second heating state can supply heat to underfloor heating pipes. One state can be selected for heating. In both states, when the external heat source temperature is high, the third port 43 of the mixing valve is opened to mix the water and lower the temperature of the first medium. At this point, the first medium, whose temperature has decreased slightly, mixes with the initial first medium whose temperature has not decreased. Specifically, the relatively high-temperature first medium entering from the first port 41 of the mixing valve mixes with the relatively low-temperature first medium entering from the third port 43. The mixed first medium flows out from the second port 42 of the mixing valve. The temperature of the first medium flowing out from the second port 42 is between that of the relatively high-temperature first medium entering from the first port 41 and the relatively low-temperature first medium entering from the third port 43. By adjusting the flow rate of the first medium entering the third port 43 of the mixing valve, the heating temperature can be controlled.

[0035] like Figure 2As shown, in the bathroom's operating state, the first medium inlet 95, the first port 11 of the inlet valve, the second port 12 of the inlet valve, the first port 41 of the mixing valve, the second port 42 of the mixing valve, the first interface 71, the second interface 72, the third port 63 of the three-way valve, the second port 62 of the three-way valve, the water pump 5, the third port 33 of the return valve, the first port 31 of the return valve, and the first medium return port 96 are connected to form the third flow path for the first medium. The bathroom inlet 94, the fourth interface 74, the third interface 73, and the bathroom outlet 93 are connected to form the flow path for the second medium (generally tap water). At this time, the second port 62 and the third port 63 of the three-way valve are connected, while the first port 61 and the second port 62 of the three-way valve are not connected. When the temperature of the second medium is too high, the third port 43 of the mixing valve can be opened to mix the water and lower the temperature of the first medium. As the temperature of the first medium decreases, the temperature of the second medium will also decrease.

[0036] The first medium supplied by the external heat source enters the third flow path through the first medium inlet 95. After passing through the heat exchanger 7, the first medium in the third flow path flows back to the external heat source through the first medium return outlet 96. The first medium is recycled throughout the process. The first medium in the third flow path exchanges heat with the second medium in the heat exchanger 7. Therefore, the temperature of the first medium after passing through the heat exchanger 7 is reduced. The first medium before entering the heat exchanger 7 is marked in red, and the first medium after passing through the heat exchanger 7 is marked in blue. The temperature of the red first medium is higher than that of the blue first medium. The second medium before entering the heat exchanger 7 is marked in blue, and the second medium after passing through the heat exchanger 7 is marked in red.

[0037] Water pump 5 is a variable frequency water pump, used in conjunction with mixing valve 4. Mixing valve 4 adjusts the temperature, and water pump 5 adjusts the flow rate. In this way, both temperature and flow rate can be adjusted, ensuring a wider range of adjustment for the bathroom water temperature.

[0038] This embodiment also discloses a heat exchange system, including a water tank 8 and a dual-temperature water heat exchange station for a centralized heat source. The water tank 8 includes a water tank outlet 81 and a water tank return outlet 82. The water tank outlet 81 is connected to a first medium inlet 95, and the water tank return outlet 82 is connected to a first medium return outlet 96. The water tank 8 provides a first medium (generally hot water) to the heat exchange station. The hot water exits from the water tank outlet 81 and flows into the first medium inlet 95 to enter the heat exchange station. After passing through the heat exchange station, the hot water exits from the first medium return outlet 96 and flows into the water tank return outlet 82 back to the water tank 8, thus circulating in a cycle.

[0039] Example 2:

[0040] Reference Figure 3 , Figure 4As shown, compared with Embodiment 1, the difference is that the three-way valve 6 is located in the first flow path, the second port 42 of the mixing valve is connected to the second port 62 of the three-way valve, the first port 61 of the three-way valve is connected to the heating inlet 91, the third port 63 of the three-way valve is connected to the first interface 71, the second port 62 of the three-way valve is the inlet end of the first medium, and the first port 61 and the third port 63 of the three-way valve are the outlet ends of the first medium.

[0041] Reference Figure 3 When in heating mode, the first port 61 and the second port 62 of the three-way valve are connected, while the second port 62 and the third port 63 of the three-way valve are not connected.

[0042] Reference Figure 4 When the bathroom is in operation, the second port 62 and the third port 63 of the three-way valve are connected, while the first port 61 and the second port 62 of the three-way valve are not connected.

[0043] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A dual-temperature water outlet heat exchange station for centralized heat sources, characterized in that, The system includes an inlet valve (1), a return valve (3), a mixing valve (4), a water pump (5), a three-way valve (6), a heat exchanger (7), a heating inlet (91), a heating return outlet (92), a bathroom outlet (93), a bathroom inlet (94), a first medium inlet (95), and a first medium return outlet (96). The inlet valve (1) includes an inlet valve first port (11) and an inlet valve second port (12). The return valve (3) includes a return valve first port (31) and a return valve third port (33). The mixing valve (4) includes a mixing valve first port (41), a mixing valve second port (42), and a mixing valve third port (43). The heat exchanger (7) includes a first interface (71), a second interface (72), a third interface (73), and a fourth interface (74). The first interface (71) and the second interface (72) are connected, and the third interface (73) and the fourth interface (74) are connected. The heat exchange station has a heating working state and a bathroom working state. In the heating working state, the first medium inlet (95), the first port (11) of the inlet valve, the second port (12) of the inlet valve, the first port (41) of the mixing valve, the second port (42) of the mixing valve, and the heating inlet (91) are connected to form the first medium. The first flow path of the medium is formed by connecting the heating return port (92), the water pump (5), the third port (33) of the return valve, the first port (31) of the return valve, and the first medium return port (96). The outlet of the water pump (5) is connected to the third port (43) of the mixing valve. The third port (43) and the first port (41) of the mixing valve are both inlet ends of the first medium. The second port (42) of the mixing valve is the outlet end of the first medium. When the bathroom is in operation, the first medium inlet (95), the first port (11) of the inlet valve, the second port (12) of the inlet valve, and the first medium return port (96) of the mixing valve are connected to form the second flow path of the first medium. The first port (41), the second port (42) of the mixing valve, the first interface (71), the second interface (72), the water pump (5), the third port (33) of the return valve, the first port (31) of the return valve, and the first medium return port (96) are connected to form the third flow path of the first medium. The bathroom inlet (94), the fourth interface (74), the third interface (73), and the bathroom outlet (93) are connected to form the flow path of the second medium. The three-way valve (6) is located in the first flow path or the second flow path. The three-way valve (6) allows the second port (42) of the mixing valve to switch with the heating inlet (91) and the first interface (71) for circulation.

2. The dual-temperature water outlet heat exchange station for a centralized heat source according to claim 1, characterized in that, The three-way valve (6) is located in the first flow path. The three-way valve (6) includes a first port (61), a second port (62), and a third port (63). The second port (42) of the mixing valve is connected to the second port (62) of the three-way valve. The first port (61) of the three-way valve is connected to the heating inlet (91). The third port (63) of the three-way valve is connected to the first interface (71). When the heating is working, the first port (61) and the second port (62) of the three-way valve are connected. When the bathroom is working, the second port (62) and the third port (63) of the three-way valve are connected. The second port (62) of the three-way valve is the inlet of the first medium. The first port (61) and the third port (63) of the three-way valve are the outlets of the first medium.

3. The dual-temperature water outlet heat exchange station for centralized heat sources according to claim 1, characterized in that, The three-way valve (6) is located in the second flow path. The three-way valve (6) includes a first port (61), a second port (62), and a third port (63). The second port (62) is connected to the inlet of the water pump (5). The first port (61) is connected to the heating return port (92). The third port (63) is connected to the second interface (72). When the heating is working, the first port (61) and the second port (62) are connected. When the bathroom is working, the second port (62) and the third port (63) are connected. The first port (61) and the third port (63) are the inlet of the first medium, and the second port (62) is the outlet of the first medium.

4. The dual-temperature water outlet heat exchange station for centralized heat sources according to claim 1, characterized in that, The inlet valve (1) also includes a third inlet valve port (13), and the return valve (3) also includes a second return valve port (32). The third inlet valve port (13) is connected to the second return valve port (32) through a bypass (2). The first medium inlet (95), the first inlet valve port (11), the third inlet valve port (13), the bypass (2), the second return valve port (32), the first return valve port (31), and the first medium return port (96) are connected to form a fourth flow path for the first medium. The bypass (2) is a unidirectional flow and has an opening pressure. The first inlet valve port (11) is the inlet end of the first medium. The second inlet valve port (12) and the third inlet valve port (13) are the outlet ends of the first medium. The second return valve port (32) and the third return valve port (33) are the inlet ends of the first medium. The first return valve port (31) is the outlet end of the first medium.

5. The dual-temperature water outlet heat exchange station for centralized heat sources according to claim 1, characterized in that, The heating working state includes a first heating state and a second heating state. The temperature of the first medium in the first heating state is higher than that of the first medium in the second heating state. The mixing valve (4) is an electric regulating valve. The flow rate of the first medium entering from the third port (43) of the mixing valve is adjustable.

6. The dual-temperature water outlet heat exchange station for centralized heat sources according to claim 1, characterized in that, The first medium and the second medium in the third flow path complete heat exchange in the heat exchanger (7).

7. The dual-temperature water outlet heat exchange station for centralized heat sources according to claim 1, characterized in that, The water pump (5) is a variable frequency water pump.

8. The dual-temperature water outlet heat exchange station for centralized heat sources according to claim 1, characterized in that, The heating inlet (91), heating return outlet (92), bathroom outlet (93), bathroom inlet (94), first medium inlet (95), and first medium return outlet (96) are all exposed at the heat exchange station.

9. A dual-temperature water heat exchange station for a centralized heat source according to claim 4, characterized in that, The inlet valve (1), bypass valve (2), and return valve (3) form an inlet valve group. The first port (11) of the inlet valve and the first medium inlet (95) are the same port, and the first port (31) of the return valve and the first medium return port (96) are the same port.

10. A heat exchange system, characterized by, Includes a water tank (8) and a dual-temperature water heat exchange station for a centralized heat source as described in any one of claims 1-9. The water tank (8) includes a water tank outlet (81) and a water tank return outlet (82). The water tank outlet (81) is connected to a first medium inlet (95), and the water tank return outlet (82) is connected to a first medium return outlet (96).

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