Air-cooled heat pump hot water preparation system

Abstract

The utility model provides an air-cooled heat pump hot water preparation system, which is characterized in that a V4 switching valve group is arranged on a second hot water return pipe close to an output end of a hot water pump group, the other output end of the hot water pump group is connected with a first hot water supply pipe through a third hot water return pipe, and a V3 switching valve group is arranged on the third hot water return pipe close to the other output end of the hot water pump group; a switching valve set V1 is arranged at the position, close to the first hot water supply pipe, of the third hot water return pipe, and the position, away from the switching valve set V1, of the side edge of the third hot water return pipe is connected with the input end of the air-cooled heat pump unit through a fourth hot water return pipe which is provided with a switching valve set V2. The output end of the plate heat exchanger set is connected with a third hot water return pipe through a fifth hot water return pipe, the switching valve set V1, the switching valve set V2, the switching valve set V3 and the switching valve set V4 are electrically connected with the control console, gradient selection and flexible switching can be carried out according to requirements, the heat supply cost is greatly reduced, and the heat supply efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hot water supply, and more specifically, to a hot water preparation system by an air-cooled heat pump. Background Art

[0002] Energy conservation and environmental protection are the current global themes and also the persistent pursuit of the HVAC and refrigeration industries. The utilization of multiple energies, the conversion of the same energy, and the recovery and utilization of waste heat and latent heat have always been the breakthrough points for energy conservation and environmental protection.

[0003] The closest prior art is the air-conditioning energy-saving cooling and heating combined supply system with a cold and hot water unit, with the publication number: CN208475529U, which discloses a controller, an air-conditioning unit, a plate heat exchanger, a boiler, and a cold and hot water unit for providing a cold source and a heat source; the boiler and the plate heat exchanger are respectively connected through a steam pipeline and a condensate pipeline; and one end of the cold and hot water unit is connected to the chilled water supply main pipe and the chilled water return main pipe, and the other end is connected to the air-conditioning unit through a hot water supply main pipe and a hot water return main pipe; the other end of the plate heat exchanger relative to the boiler is connected to the air-conditioning unit through a heat exchange water supply main pipe and a heat exchange water return main pipe.

[0004] The existing heating system uses a boiler and a plate heat exchanger for dual-channel heating. The boiler is driven by gas, resulting in high costs. When the cooling and heating demands are unbalanced, the plate heat exchanger can only meet the lower requirements. When the hot water demand is large, there is a problem of insufficient heating.

[0005] In view of this, the utility model proposes a hot water preparation system by an air-cooled heat pump that can be flexibly switched and energy-saving. Summary of the Utility Model

[0006] The purpose of the utility model is to propose a hot water preparation system by an air-cooled heat pump that can be flexibly switched and energy-saving.

[0007] An air-cooled heat pump hot water preparation system includes an air-cooled heat pump unit 1, a plate heat exchanger unit 2, a hot water pump unit 3, a first hot water supply pipe 4, a first hot water return pipe 5, a second hot water return pipe 6, a third hot water return pipe 7, a fourth hot water return pipe 8, a fifth hot water return pipe 9, and a control console 10. It is characterized in that: the output end of the air-cooled heat pump unit 1 is connected to the hot water supply end of the production workshop through the first hot water supply pipe 4, the hot water return end of the production workshop is connected to the input end of the hot water pump unit 3 through the first hot water return pipe 5, one output end of the hot water pump unit 3 is connected to the input end of the plate heat exchanger unit 2 through the second hot water return pipe 6, and a V4 switching valve group 11 is provided on the second hot water return pipe 6 near one output end of the hot water pump unit 3. The other output end of the hot water pump unit 3 is connected to the first hot water supply pipe 4 through the third hot water return pipe 7, a V3 switching valve group 12 is provided on the third hot water return pipe 7 near the other output end of the hot water pump unit 3, a V1 switching valve group 13 is provided on the third hot water return pipe 7 near the first hot water supply pipe 4, the side of the third hot water return pipe 7 far from the V1 switching valve group 13 is connected to the input end of the air-cooled heat pump unit 1 through the fourth hot water return pipe 8, and a V2 switching valve group 14 is provided on the fourth hot water return pipe 8. The output end of the plate heat exchanger unit 2 is connected to the third hot water return pipe 7 through the fifth hot water return pipe 9. The V1 switching valve group 13, the V2 switching valve group 14, the V3 switching valve group 12, and the V4 switching valve group 11 are electrically connected to the control console 10.

[0008] Further, there are multiple groups of air-cooled heat pump units 1, and the multiple groups of air-cooled heat pump units 1 are connected in parallel. A first flexible joint 15, a first thermometer 16, a first pressure gauge 17, and a first butterfly valve 18 are sequentially provided from top to bottom at the output end and the input end of each group of air-cooled heat pump units 1.

[0009] In some embodiments, there are multiple groups of the hot water pump units 3, and the multiple groups of hot water pump units 3 are arranged in parallel. A second flexible joint 31, a second pressure gauge 32, a Y-type filter 33, and a second butterfly valve 34 are sequentially provided from left to right at the input end of each hot water pump unit 3. A third butterfly valve 35, a first check valve 36, a third pressure gauge 37, and a third flexible joint 38 are sequentially provided from left to right at the input and output ends of each hot water pump unit 3.

[0010] In some embodiments, a bypass pipe structure 19 is further provided between the first hot water supply pipe 4 and the first hot water return pipe 5, which is convenient for shutdown maintenance and adjustment of the end flow.

[0011] Further, a differential pressure sensor 191 is further provided on the bypass pipe structure 19. One end of the differential pressure sensor 191 is connected to the first hot water supply pipe 4, the other end of the differential pressure sensor 191 is connected to the first hot water return pipe 5. The differential pressure sensor 191 is used to monitor the pressure difference between the first hot water supply pipe 4 and the first hot water return pipe 5, and the differential pressure sensor 191 is electrically connected to the control console 10.

[0012] In some embodiments, a temperature sensor 20 is provided on the first hot water supply pipe 4. The temperature sensor 20 is used to monitor the water supply temperature and is electrically connected to the control console 10.

[0013] In some embodiments, a constant pressure water replenishing device 21 is further connected to the first hot water return pipe 5 for replenishing water to the system.

[0014] Furthermore, the constant pressure water replenishing device 21 includes a diaphragm tank 211, a make-up water pump 212, and a make-up water tank 213. The output end of the make-up water tank 213 is connected to the input end of the diaphragm tank 211 through the make-up water pump 212, and the output end of the diaphragm tank 211 is connected to the first hot water return pipe 5 through a pipeline.

[0015] In some embodiments, the hot water pump group 3 is a horizontal end-suction centrifugal water pump.

[0016] The working principle of the present utility model:

[0017] (1) When the return water requirement is 50 °C and the water supply requirement is 65 °C, only the air-cooled heat pump unit 1 is used. The V3 switching valve group 12 and the V2 switching valve group 14 are opened, and the V1 switching valve group 13 and the V4 switching valve group 11 are closed.

[0018] (2) When the return water requirement is 30 °C and the water supply requirement is 40 °C, only the plate heat exchanger group 2 is used. The V1 switching valve group 13 and the V4 switching valve group 11 are opened, and the V3 switching valve group 12 and the V2 switching valve group 14 are closed.

[0019] (3) When the return water requirement is 30 °C and the water supply requirement is 60 °C, the plate heat exchanger group 2 is used to first raise the temperature to 50 °C, and then the air-cooled heat pump unit 1 is used to raise the temperature to 60 °C. The V2 switching valve group 14 and the V4 switching valve group 11 are opened, and the V1 switching valve group 13 and the V3 switching valve group 12 are closed.

[0020] Advantages of the present utility model: The present utility model provides a hot water preparation system using an air-cooled heat pump. The output end of the air-cooled heat pump unit 1 is connected to the hot water supply end of the production workshop through the first hot water supply pipe 4. The hot water return end of the production workshop is connected to the input end of the hot water pump group 3 through the first hot water return pipe 5. One output end of the hot water pump group 3 is connected to the input end of the plate heat exchanger group 2 through the second hot water return pipe 6. A V4 switching valve group 11 is provided on the second hot water return pipe 6 near one output end of the hot water pump group 3. The other output end of the hot water pump group 3 is connected to the first hot water supply pipe 4 through the third hot water return pipe 7. A V3 switching valve group 12 is provided on the third hot water return pipe 7 near the other output end of the hot water pump group 3. A V1 switching valve group 13 is provided on the third hot water return pipe 7 near the first hot water supply pipe 4. The side of the third hot water return pipe 7 far from the V1 switching valve group 13 is connected to the input end of the air-cooled heat pump unit 1 through the fourth hot water return pipe 8. A V2 switching valve group 14 is provided on the fourth hot water return pipe 8. The output end of the plate heat exchanger group 2 is connected to the third hot water return pipe 7 through the fifth hot water return pipe 9. The V1 switching valve group 13, V2 switching valve group 14, V3 switching valve group 12, and V4 switching valve group 11 are electrically connected to the control console 10. Gradient selection can be performed according to requirements, and flexible switching can be achieved, greatly reducing the heating cost and improving the heating efficiency. Description of the Drawings

[0021] Figure 1 It is a schematic structural diagram of a hot water preparation system using an air-cooled heat pump according to the present application.

[0022] Main Element Symbol Explanation:

[0023] Air-cooled heat pump unit 1, plate heat exchanger group 2, hot water pump group 3, second flexible joint 31, second pressure gauge 32, Y-type filter 33, second butterfly valve 34, third butterfly valve 35, first check valve 36, third pressure gauge 37, third flexible joint 38, first hot water supply pipe 4, first hot water return pipe 5, second hot water return pipe 6, third hot water return pipe 7, fourth hot water return pipe 8, fifth hot water return pipe 9, control console 10, V4 switching valve group 11, V3 switching valve group 12, V1 switching valve group 13, V2 switching valve group 14, first flexible joint 15, first thermometer 16, first pressure gauge 17, first butterfly valve 18, bypass pipe structure 19, differential pressure sensor 191, temperature sensor 20, constant pressure water supply device 21, diaphragm tank 211, make-up water pump 212, make-up water tank 213.

[0024] The following specific embodiments will further illustrate the present utility model in conjunction with the above-mentioned drawings. Specific Embodiments

[0025] The following embodiments are described to assist in understanding the present application. The embodiments are not and should not be construed in any way as limiting the scope of protection of the present application.

[0026] In the following description, those skilled in the art will recognize that throughout this discussion, components may be described as separate functional units (which may include sub-units), but those skilled in the art will recognize that various components or portions thereof may be divided into separate components or integrated together (including being integrated within a single system or component).

[0027] At the same time, the connections between components or systems are not intended to be limited to direct connections. Instead, the data between these components may be modified, reformatted, or otherwise changed by intermediate components. Additionally, additional or fewer connections may be used. It should also be noted that the terms "coupled", "connected", or "input" should be understood to include direct connections, indirect connections through one or more intermediate devices, and wireless connections. Embodiment 1:

[0028] As Figure 1 shown, it is a schematic structural diagram of a hot water preparation system using an air-cooled heat pump according to the present application.

[0029] A hot water preparation system using an air-cooled heat pump includes an air-cooled heat pump unit 1, a plate heat exchanger group 2, a hot water pump group 3, a first hot water supply pipe 4, a first hot water return pipe 5, a second hot water return pipe 6, a third hot water return pipe 7, a fourth hot water return pipe 8, a fifth hot water return pipe 9, and a control console 10. It is characterized in that: the output end of the air-cooled heat pump unit 1 is connected to the hot water supply end of the production workshop through the first hot water supply pipe 4, the hot water return end of the production workshop is connected to the input end of the hot water pump group 3 through the first hot water return pipe 5, one output end of the hot water pump group 3 is connected to the input end of the plate heat exchanger group 2 through the second hot water return pipe 6, a V4 switching valve group 11 is provided on the second hot water return pipe 6 near one output end of the hot water pump group 3, the other output end of the hot water pump group 3 is connected to the first hot water supply pipe 4 through the third hot water return pipe 7, a V3 switching valve group 12 is provided on the third hot water return pipe 7 near the other output end of the hot water pump group 3, a V1 switching valve group 13 is provided on the third hot water return pipe 7 near the first hot water supply pipe 4, the fourth hot water return pipe 8 is connected to the input end of the air-cooled heat pump unit 1 at a position on the side of the third hot water return pipe 7 away from the V1 switching valve group 13, a V2 switching valve group 14 is provided on the fourth hot water return pipe 8, the output end of the plate heat exchanger group 2 is connected to the third hot water return pipe 7 through the fifth hot water return pipe 9, and the V1 switching valve group 13, the V2 switching valve group 14, the V3 switching valve group 12, and the V4 switching valve group 11 are electrically connected to the control console 10.

[0030] There are multiple groups of air-cooled heat pump units 1, and the multiple groups of air-cooled heat pump units 1 are connected in parallel. At the output end and input end of each group of air-cooled heat pump units 1, a first flexible joint 15, a first thermometer 16, a first pressure gauge 17, and a first butterfly valve 18 are provided in sequence from top to bottom.

[0031] There are multiple groups of the hot water pump sets 3, and the multiple groups of hot water pump sets 3 are arranged in parallel. At the input end of each hot water pump set 3, a second flexible joint 31, a second pressure gauge 32, a Y-type filter 33, and a second butterfly valve 34 are successively provided from left to right. At the inlet and outlet end of each hot water pump set 3, a third butterfly valve 35, a first check valve 36, a third pressure gauge 37, and a third flexible joint 38 are successively provided from left to right.

[0032] A bypass pipe structure 19 is further provided between the first hot water supply pipe 4 and the first hot water return pipe 5, which is convenient for shutdown maintenance and regulating the end flow rate.

[0033] A differential pressure sensor 191 is further provided on the bypass pipe structure 19. One end of the differential pressure sensor 191 is connected to the first hot water supply pipe 4, and the other end of the differential pressure sensor 191 is connected to the first hot water return pipe 5. The differential pressure sensor 191 is used to monitor the pressure difference between the first hot water supply pipe 4 and the first hot water return pipe 5, and the differential pressure sensor 191 is electrically connected to the control console 10.

[0034] A temperature sensor 20 is provided on the first hot water supply pipe 4. The temperature sensor 20 is used to monitor the water supply temperature, and the temperature sensor 20 is electrically connected to the control console 10.

[0035] The first hot water return pipe 5 is further connected with a constant pressure water replenishing device 21 for replenishing water to the system.

[0036] The constant pressure water replenishing device 21 includes a diaphragm tank 211, a makeup water pump 212, and a makeup water tank 213. The output end of the makeup water tank 213 is connected to the input end of the diaphragm tank 211 through the makeup water pump 212, and the output end of the diaphragm tank 211 is connected to the first hot water return pipe 5 through a pipeline.

[0037] The hot water pump set 3 is a horizontal end-suction centrifugal water pump.

[0038] The working principle of the present utility model:

[0039] (4) When the return water requirement is 50 °C and the water supply requirement is 65 °C, only the air-cooled heat pump unit 1 is used, the V3 switching valve group 12 and the V2 switching valve group 14 are opened, and the V1 switching valve group 13 and the V4 switching valve group 11 are closed.

[0040] (5) When the return water requirement is 30 °C and the water supply requirement is 40 °C, only the plate heat exchanger group 2 is used, the V1 switching valve group 13 and the V4 switching valve group 11 are opened, and the V3 switching valve group 12 and the V2 switching valve group 14 are closed.

[0041] When the required return water temperature is 30 °C and the required supply water temperature is 60 °C, the plate heat exchanger group 2 is first used to raise the temperature to 50 °C, and then the air-cooled heat pump unit 1 is used to raise the temperature to 60 °C. The V2 switching valve group 14 and the V4 switching valve group 11 are opened, and the V1 switching valve group 13 and the V3 switching valve group 12 are closed.

[0042] The beneficial effects of the present utility model: The present utility model provides a hot water preparation system using an air-cooled heat pump. The output end of the air-cooled heat pump unit 1 is connected to the hot water supply end of the production workshop through the first hot water supply pipe 4. The hot water return end of the production workshop is connected to the input end of the hot water pump group 3 through the first hot water return pipe 5. One output end of the hot water pump group 3 is connected to the input end of the plate heat exchanger group 2 through the second hot water return pipe 6. A V4 switching valve group 11 is provided on the second hot water return pipe 6 near one output end of the hot water pump group 3. The other output end of the hot water pump group 3 is connected to the first hot water supply pipe 4 through the third hot water return pipe 7. A V3 switching valve group 12 is provided on the third hot water return pipe 7 near the other output end of the hot water pump group 3. A V1 switching valve group 13 is provided on the third hot water return pipe 7 near the first hot water supply pipe 4. The side of the third hot water return pipe 7 away from the V1 switching valve group 13 is connected to the input end of the air-cooled heat pump unit 1 through the fourth hot water return pipe 8. A V2 switching valve group 14 is provided on the fourth hot water return pipe 8. The output end of the plate heat exchanger group 2 is connected to the third hot water return pipe 7 through the fifth hot water return pipe 9. The V1 switching valve group 13, the V2 switching valve group 14, the V3 switching valve group 12, and the V4 switching valve group 11 are electrically connected to the control console 10. Gradient selection can be carried out according to requirements, and flexible switching can be achieved, greatly reducing the heating cost and improving the heating efficiency.

[0043] Although multiple aspects and embodiments of the present application have been disclosed, other aspects and embodiments will be obvious to those skilled in the art. Without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. The multiple aspects and embodiments disclosed in the present application are only used for illustration, and they are not intended to limit the present application. The actual protection scope of the present application is subject to the claims.

Claims

1. An air-cooled heat pump hot water preparation system, comprising an air-cooled heat pump unit (1), a plate heat exchanger unit (2), a hot water pump unit (3), a first hot water supply pipe (4), a first hot water return pipe (5), a second hot water return pipe (6), a third hot water return pipe (7), a fourth hot water return pipe (8), a fifth hot water return pipe (9), and a control console (10), characterized in that: The output end of the air-cooled heat pump unit (1) is connected to the hot water supply end of the production workshop through a first hot water supply pipe (4); the hot water return end of the production workshop is connected to the input end of the hot water pump group (3) through a first hot water return pipe (5); one output end of the hot water pump group (3) is connected to the input end of the plate heat exchanger group (2) through a second hot water return pipe (6); a V4 switching valve group (11) is provided on the second hot water return pipe (6) near one output end of the hot water pump group (3); the other output end of the hot water pump group (3) is connected to the first hot water supply pipe (4) through a third hot water return pipe (7); a V4 switching valve group (11) is provided on the third hot water return pipe (7) near the other output end of the hot water pump group (3); A V1 switching valve group (13) is provided on the third hot water return pipe (7) near the first hot water supply pipe (4); a side of the third hot water return pipe (7) away from the V1 switching valve group (13) is connected to the input end of the air-cooled heat pump unit (1) through a fourth hot water return pipe (8); a V2 switching valve group (14) is provided on the fourth hot water return pipe (8); an output end of the plate heat exchanger unit (2) is connected to the third hot water return pipe (7) through a fifth hot water return pipe (9); and the V1 switching valve group (13), the V2 switching valve group (14), the V3 switching valve group (12), and the V4 switching valve group (11) are electrically connected to the control console (10).

2. The air-cooled heat pump hot water preparation system according to claim 1, characterized in that: There are multiple groups of air-cooled heat pump units (1), which are connected in parallel. The output end and the input end of each group of air-cooled heat pump units (1) are provided with a first flexible connection (15), a first thermometer (16), a first pressure gauge (17), and a first butterfly valve (18) in order from top to bottom.

3. The air-cooled heat pump hot water preparation system according to claim 1, characterized in that: The hot water pump groups (3) include a plurality of groups, and the plurality of groups of hot water pump groups (3) are arranged in parallel. The input end of each hot water pump group (3) is provided with a second flexible connection (31), a second pressure gauge (32), a Y-type filter (33), and a second butterfly valve (34) in sequence from left to right. The inlet and outlet ends of each hot water pump group (3) are provided with a third butterfly valve (35), a first check valve (36), a third pressure gauge (37), and a third flexible connection (38) in sequence from left to right.

4. The air-cooled heat pump hot water preparation system according to claim 1, characterized in that: A bypass pipe structure (19) is also provided between the first hot water supply pipe (4) and the first hot water return pipe (5) to facilitate shutdown maintenance and adjustment of terminal flow.

5. The air-cooled heat pump hot water preparation system according to claim 4, characterized in that: The bypass pipe structure (19) is also provided with a pressure difference sensor (191); one end of the pressure difference sensor (191) is connected to the first hot water supply pipe (4); the other end of the pressure difference sensor (191) is connected to the first hot water return pipe (5); the pressure difference sensor (191) is used to monitor the pressure difference between the first hot water supply pipe (4) and the first hot water return pipe (5); the pressure difference sensor (191) is electrically connected to the control console (10).

6. The air-cooled heat pump hot water preparation system according to claim 1, characterized in that: The first hot water supply pipe (4) is provided with a temperature sensor (20), the temperature sensor (20) is used to monitor the water supply temperature, and the temperature sensor (20) is electrically connected to the control console (10).

7. The air-cooled heat pump hot water preparation system according to claim 1, characterized in that: The first hot water return pipe (5) is also connected to a constant pressure water replenishment device (21) for replenishing water for the system.

8. The air-cooled heat pump hot water preparation system according to claim 7, characterized in that: The constant-pressure water replenishment device (21) comprises a diaphragm tank (211), a water replenishment pump (212), and a water replenishment tank (213); the output end of the water replenishment tank (213) is connected to the input end of the diaphragm tank (211) via the water replenishment pump (212); and the output end of the diaphragm tank (211) is connected to the first hot water return pipe (5) via a pipeline.

9. The air-cooled heat pump hot water preparation system according to claim 1, characterized in that: The hot water pump group (3) is a horizontal end-suction centrifugal water pump.

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