A heating system of air-cooled heat pump coupled electric boiler

Abstract

The utility model provides a kind of heating system of air-cooled heat pump coupling electric boiler, including air-cooled heat pump unit, electric boiler, heating circulating water pump, valve group and the water pipeline network of connecting all components;The valve group is used to make water pipeline network can constitute multiple fluid communication circulation loop by the combination of different on-off states, and the circulation loop at least includes air-cooled heat pump independent heating path, electric boiler independent heating path, parallel coupling heating path and series coupling heating path.The utility model can solve the heating guarantee problem of single heating system, also solve the heating attenuation and instability problem of air-cooled heat pump unit in low temperature environment, greatly improve the quality of heating system, save heating cost, and different path can be operated according to different needs, realize stable operation, economic operation and heat storage operation.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning and heating technology, and in particular to a heating system for an air-cooled heat pump coupled with an electric boiler. Background Technology

[0002] Air-cooled heat pumps, as a highly efficient heating technology that utilizes ambient air as a heat source, have been increasingly widely used in winter heating due to their cleanliness, energy efficiency, and ease of installation. Their basic principle is to absorb heat from outdoor air through refrigerant circulation and release it into the indoor heating system, achieving efficient energy transfer. However, air-cooled heat pump technology has a significant drawback in practical applications: its heating capacity and operating efficiency are greatly affected by ambient temperature. As ambient temperatures decrease in winter, air-cooled heat pump units operate inefficiently at lower temperatures, and may even fail to start normally, failing to meet the basic heat load requirements of buildings and severely restricting their widespread application in cold regions.

[0003] Therefore, this application urgently needs to design a heating system that can solve the problem of ensuring the heating capacity of a single heating system, as well as the problem of heating capacity attenuation and instability of air-cooled heat pumps in low-temperature environments. Utility Model Content

[0004] The purpose of this invention is to overcome the above-mentioned shortcomings of the prior art and provide a heating system for an air-cooled heat pump coupled with an electric boiler that has high heating stability and high flexibility.

[0005] The technical solution of this utility model is: a heating system of an air-cooled heat pump coupled with an electric boiler, including an air-cooled heat pump unit, an electric boiler, a heating circulating water pump, a valve group, and a water pipe network connecting all components; the valve group is used to enable the water pipe network to form multiple fluid-connected circulation loops through different combinations of on / off states, and the circulation loop includes at least: First circulation loop: The heating circulating water pump, the air-cooled heat pump unit and the heat exchange terminal are connected in series to form an independent heating path for the air-cooled heat pump. Second circulation loop: The heating circulating water pump, electric boiler and heat exchange terminal are connected in series to form an independent heating path for the electric boiler; The third circulation loop: the heating circulating water pump is connected to the heat exchange terminal, and is simultaneously connected in parallel with the air-cooled heat pump unit and the electric boiler to form a parallel coupled heating path; The fourth circulation loop: the heating circulating water pump, the air-cooled heat pump unit, the electric boiler and the heat exchange terminal are connected in series to form a series-coupled heating path.

[0006] Furthermore, it also includes a hot water storage tank, and through combinations of different on / off states of the valve assembly, the water pipe network can also be configured as follows: Fifth circulation loop: The heating circulating water pump, the air-cooled heat pump unit and the hot water storage tank are connected in series to form the first heat storage path; the heating circulating water pump, the electric boiler and the hot water storage tank are connected in series to form the second heat storage path; the second heat storage path is used to relay heat the hot water storage tank that has been preheated by the first heat storage path, and the two are combined to form a relay heat storage and heating path.

[0007] Furthermore, it also includes a water tank and a hot water pump, and through combinations of different on / off states of the valve group, the water pipe network can also be configured as follows: The sixth circulation loop: the water tank hot water pump, the hot water storage tank and the heat exchange terminal are connected in series to form a heat release path.

[0008] Furthermore, the valve assembly is a combination of multiple independently installed solenoid valves, electric valves, or manual valves.

[0009] Furthermore, the circulating water outlet of the heat exchange terminal is connected to the inlet of the heating circulating water pump via a first valve. The outlet of the heating circulating water pump is divided into at least two branches. One branch is connected to the inlet of the air-cooled heat pump unit via a second valve, and the other branch is connected to the inlet of the electric boiler via a third valve. The hot water outlet of the air-cooled heat pump unit is connected to the hot water inlet of the heat exchange terminal via a fourth and a fifth valve. The hot water outlet of the electric boiler is connected to the hot water inlet of the heat exchange terminal via a sixth and the fifth valve. The hot water outlet of the air-cooled heat pump unit is also connected to the inlet of the electric boiler via a seventh valve.

[0010] Furthermore, the heat storage inlet of the hot water storage tank is connected to the pipeline between the fourth and fifth valves via the eighth valve; the heat storage outlet of the hot water storage tank is connected to the inlet of the heating circulating water pump via the ninth valve.

[0011] Furthermore, the circulating water outlet of the heat exchange terminal is connected to the heat release inlet of the hot water storage tank via the water tank hot water pump and the tenth valve in sequence; the heat release outlet of the hot water storage tank is connected to the hot water inlet of the heat exchange terminal via the eleventh valve.

[0012] Furthermore, the air-cooled heat pump unit, the heating circulating water pump, the second valve, the fourth valve, the first valve, and the fifth valve are connected by pipelines to form the independent heating path of the air-cooled heat pump; the electric boiler, the heating circulating water pump, the third valve, the sixth valve, the first valve, and the fifth valve are connected by pipelines to form the independent heating path of the electric boiler; the air-cooled heat pump unit, the electric boiler, the heating circulating water pump, the second valve, the fourth valve, the third valve, the sixth valve, the first valve, and the fifth valve are connected by pipelines to form the parallel coupled heating path; the air-cooled heat pump unit, the electric boiler, the heating circulating water pump, the first valve, the second valve, the seventh valve, the sixth valve, and the fifth valve are connected by pipelines to form the series coupled heating path.

[0013] Furthermore, the air-cooled heat pump unit, the hot water storage tank, the heating circulating water pump, the eighth valve, the ninth valve, the second valve, and the fourth valve are connected by pipelines to form the first heat storage passage; the electric boiler, the hot water storage tank, the heating circulating water pump, the eighth valve, the ninth valve, the third valve, and the sixth valve are connected by pipelines to form the second heat storage passage.

[0014] Furthermore, the hot water storage tank, the hot water pump, the tenth valve, and the eleventh valve are connected by pipelines to form the heat release path.

[0015] The beneficial effects of this invention are as follows: Firstly, the air-cooled heat pump unit and the electric boiler can operate independently, or form a parallel coupled heating system, or a series coupled heating system. Because the electric boiler provides stable heating, it can serve as a supplementary heating device for the air-cooled heat pump unit. The coupling of the two solves both the heating guarantee problem of a single heating system and the heating attenuation and instability issues of the air-cooled heat pump unit in low-temperature environments, greatly improving the system quality. Secondly, by setting up a hot water storage tank, it is particularly suitable for areas with large peak-valley electricity price differences, enabling heat storage during off-peak electricity periods, thereby saving heating costs. Furthermore, the entire heating system can operate in different modes according to different needs, achieving stable operation, economical operation, and heat storage operation. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall connection structure of an embodiment of the present utility model; Figure 2 This is a schematic diagram (solid lines) of the operation of the air-cooled heat pump in the independent heating circuit mode of this utility model embodiment. Figure 3 This is a schematic diagram (solid lines) of the electric boiler operating under the independent heating circuit mode of this utility model embodiment. Figure 4 This is a schematic diagram (solid lines) of the parallel coupling heating path mode of this utility model embodiment. Figure 5 This is a schematic diagram (solid lines) of the working process of the series coupling heating circuit mode of this utility model embodiment. Figure 6 This is a schematic diagram (solid lines) of the first heat storage passage mode of this utility model embodiment. Figure 7 This is a schematic diagram of the operation under the second heat storage passage mode of this utility model (solid line portion). Figure 8 This is a schematic diagram (solid line portion) of the working process in the heat release pathway mode of this utility model embodiment. Detailed Implementation

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] like Figure 1 The diagram shows a heating system for an air-cooled heat pump coupled to an electric boiler, comprising an air-cooled heat pump unit 1, an electric boiler 2, a hot water storage tank 3, a heating circulating water pump 4, a water tank hot water pump 5, valve assemblies, heat exchange terminals, and a water piping network connecting all components. The valve assemblies consist of a combination of multiple independently installed solenoid valves or electric valves; this embodiment includes 11 valves, used to create various fluid circulation loops in the water piping network through combinations of different on / off states.

[0019] The connection relationships of the above components are as follows: The circulating water outlet of the heat exchange terminal is connected to the inlet of the heating circulating water pump 4 via the first valve 16. The outlet of the heating circulating water pump 4 is divided into at least two branches. One branch is connected to the inlet 20 of the air-cooled heat pump unit 1 via the second valve 6, and the other branch is connected to the inlet 22 of the electric boiler 2 via the third valve 9. The hot water outlet 21 of the air-cooled heat pump unit 1 is connected to the hot water inlet of the heat exchange terminal via the fourth valve 7 and the fifth valve 15. The hot water outlet 23 of the electric boiler 2 is connected to the hot water inlet of the heat exchange terminal via the sixth valve 8 and the fifth valve 15. The hot water outlet 21 of the air-cooled heat pump unit 1 is also connected to the inlet 22 of the electric boiler 2 via the seventh valve 10.

[0020] The heat storage inlet 24 of the hot water storage tank 3 is connected to the pipeline between the fourth valve 7 and the fifth valve 15 via the eighth valve 14; the heat storage outlet 25 of the hot water storage tank 3 is connected to the inlet of the heating circulating water pump 4 via the ninth valve 13.

[0021] The circulating water outlet of the heat exchange terminal is connected to the heat release inlet 26 of the hot water storage tank 3 via the water tank hot water pump 5 and the tenth valve 11 in sequence; the heat release outlet 27 of the hot water storage tank 3 is connected to the hot water inlet of the heat exchange terminal via the eleventh valve 12.

[0022] It is understood that the valve in this embodiment can be a solenoid valve, an electric valve, or a manual valve, with an electric valve being preferred.

[0023] This embodiment uses combinations of different on / off states of various valves to enable the water pipeline network to form the following circulation loop: The first circulation loop consists of the heating circulating water pump 4, the air-cooled heat pump unit 1, and the heat exchange terminal connected in series to form an independent heating path for the air-cooled heat pump. Specifically, the air-cooled heat pump unit 1, the heating circulating water pump 4, the second valve 6, the fourth valve 7, the first valve 16, and the fifth valve 15 are connected by pipelines to form the independent heating path for the air-cooled heat pump.

[0024] The second circulation loop consists of the heating circulating water pump 4, the electric boiler 2, and the heat exchange terminal connected in series to form an independent heating path for the electric boiler. Specifically, the electric boiler 2, the heating circulating water pump 4, the third valve 9, the sixth valve 8, the first valve 16, and the fifth valve 15 are connected by pipelines to form the independent heating path for the electric boiler.

[0025] The third circulation loop: The heating circulating water pump 4 is connected to the heat exchange terminal and simultaneously connected in parallel with the air-cooled heat pump unit 1 and the electric boiler 2, forming a parallel coupled heating path. Specifically, the air-cooled heat pump unit 1, the electric boiler 2, the heating circulating water pump 4, the second valve 6, the fourth valve 7, the third valve 9, the sixth valve 8, the first valve 16, and the fifth valve 15 are connected by pipelines to form the parallel coupled heating path. In other words, the parallel coupled heating path allows the air-cooled heat pump unit 1 and the electric boiler 2 to operate simultaneously. The circulating water provided by the heating circulating water pump 4 is simultaneously distributed to the air-cooled heat pump unit 1 and the electric boiler 2 through water pipelines. After being heated, the circulating water is then combined back into the water pipelines.

[0026] The fourth circulation loop: The heating circulating water pump 4, the air-cooled heat pump unit 1, the electric boiler 2, and the heat exchange terminal are connected in series to form a series-coupled heating path. Specifically, the air-cooled heat pump unit 1, the electric boiler 2, the heating circulating water pump 4, the first valve 16, the second valve 6, the seventh valve 10, the sixth valve 8, and the fifth valve 15 are connected by pipelines to form the series-coupled heating path. In other words, the series-coupled heating path allows the air-cooled heat pump unit 1 and the electric boiler 2 to operate simultaneously. The circulating water provided by the heating circulating water pump 4 flows through water pipelines to the air-cooled heat pump unit 1 for primary heating, and then, after being output from the air-cooled heat pump unit 1, it is further heated by the electric boiler 2 to provide hot water at a higher temperature. The fifth circulation loop consists of a heating circulating water pump 4, an air-cooled heat pump unit 1, and a hot water storage tank 3 connected in series to form a first heat storage path; and a heating circulating water pump 4, an electric boiler 2, and a hot water storage tank 3 connected in series to form a second heat storage path. This second heat storage path is used to relay-heat the hot water storage tank after preheating in the first heat storage path, thus forming a relay-heat storage and heating path. Specifically, the air-cooled heat pump unit 1, the hot water storage tank 3, the heating circulating water pump 4, the eighth valve 14, the ninth valve 13, the second valve 6, and the fourth valve 7 are connected by pipelines to form the first heat storage path; the electric boiler 2, the hot water storage tank 3, the heating circulating water pump 4, the eighth valve 14, the ninth valve 13, the third valve 9, and the sixth valve 8 are connected by pipelines to form the second heat storage path. When the heating temperature of the water in the hot water storage tank 3 by the air-cooled heat pump unit 1 reaches a preset value, the system switches to the electric boiler 2 to heat the water in the hot water storage tank 3, forming a relay-heating mode.

[0027] The sixth circulation loop: the water tank hot water pump 5, the hot water storage tank 3, and the heat exchange terminal are connected in series to form a heat release path. Specifically, the hot water storage tank 3, the water tank hot water pump 5, the tenth valve 11, and the eleventh valve 12 are connected by pipelines to form the heat release path.

[0028] The working principle of this embodiment is as follows: (1) Independent heating circuit mode of air-cooled heat pump, such as Figure 2 As shown: Open the second valve 6, the fourth valve 7, the fifth valve 15, and the first valve 16, and close all other valves. The air-cooled heat pump unit 1 independently provides heat to the heat exchange terminal on the user side. That is, the air conditioning water at the heat exchange terminal flows to the air-cooled heat pump unit 1 for heating after passing through the heating circulation water pump 4. The resulting hot water then returns to the heat-using end of the heat exchange terminal to complete the heating cycle.

[0029] (2) Independent heating circuit mode for electric boilers, such as Figure 3 As shown: Open valves 8 (sixth), 9 (third), 15 (fifth), and 16 (first), and close all other valves. The electric boiler 2 independently supplies heat to the heat exchange terminal on the user side. That is, the air conditioning water at the heat exchange terminal flows to the electric boiler 2 for heating after passing through the heating circulation water pump 4. The resulting hot water then returns to the heat-using end of the heat exchange terminal to complete the heating cycle.

[0030] (3) Parallel coupled heating circuit mode, such as Figure 4 As shown: Open valves 6, 7, 8, 9, 15, and 16, and close all other valves. The air-cooled heat pump unit 1 and the electric boiler 2 supply heat to the heat exchange terminal in a parallel coupling manner. Specifically, the air conditioning water at the heat exchange terminal flows through the heating circulating water pump 4 to both the air-cooled heat pump unit 1 and the electric boiler 2 for heating. The hot water produced by both then returns to the heat-consuming end of the heat exchange terminal to complete the heating cycle.

[0031] (4) Series-coupled heating circuit mode, such as Figure 5 As shown: Open valves 6, 8, 10, 15, and 16, and close all other valves. The air-cooled heat pump unit 1 and the electric boiler 2 supply heat to the heat exchange terminal in a series coupling manner. Specifically, the air conditioning water at the heat exchange terminal flows to the air-cooled heat pump unit 1 for heating after passing through the heating circulation water pump 4. The resulting hot water then flows to the electric boiler 2 for further heating, and finally, the hot water output from the electric boiler 2 returns to the heat-consuming end of the heat exchange terminal to complete the heating cycle.

[0032] (5) Relay heat storage heating circuit mode, such as Figure 6 and Figure 7 As shown: In the relay-style heat storage heating mode, the air-cooled heat pump unit 1 and the electric boiler 2 work together to store heat in the hot water tank. First, it enters the first heat storage mode, such as... Figure 6 As shown: Open valves 6, 7, 13, and 14, and close all other valves. The air-cooled heat pump unit 1 then heats and stores the water in the hot water storage tank 3. Specifically, the cooling water output from the hot water storage tank 3 flows to the air-cooled heat pump unit 1 for heating after passing through the heating circulating water pump 4. The resulting hot water then returns to the hot water storage tank 3 to circulate and heat the water within it.

[0033] When the water in the hot water storage tank 3 is heated to 50℃, the second heat storage circuit mode is activated, such as... Figure 7 As shown: The second valve 6 and the fourth valve 7 are closed, while the sixth valve 8 and the third valve 9 are opened. The ninth valve 13 and the eighth valve 14 remain open, and the remaining valves remain closed. The electric boiler 2 further heats and stores the water in the hot water storage tank 3. Specifically, the heated hot water output from the hot water storage tank 3 flows to the electric boiler 2 for further heating after passing through the heating circulation pump 4. The resulting hot water then returns to the hot water storage tank 3 to circulate and heat the water in the tank until it meets the requirements.

[0034] (6) Exothermic pathway mode, such as Figure 8 As shown: Open the tenth valve 11 and the eleventh valve 12, and close the remaining valves. The heat is then released independently from the hot water storage tank 3 to the heat exchange terminal on the user side. That is, the air conditioning water at the heat exchange terminal flows to the hot water storage tank 3 through the water tank hot water pump 5 for heating, and the generated hot water returns to the heat-using end of the heat exchange terminal to complete the heating cycle.

[0035] In summary, this embodiment couples an air-cooled heat pump unit with an electric boiler and adds a hot water storage tank. Since the electric boiler provides stable heating, it can serve as a supplementary heating device for the air-cooled heat pump unit. Especially in areas with large peak-valley electricity price differences, the hot water storage tank can also store heat during off-peak electricity periods. This solves both the heating guarantee problem of a single heating system and the heating attenuation and instability problems of the air-cooled heat pump unit in low-temperature environments, greatly improving the quality of the heating system, saving heating costs, and enabling different operation paths according to different needs, achieving stable operation, economical operation, and heat storage operation.

Claims

1. A heating system for an air-cooled heat pump coupled with an electric boiler, characterized in that, It includes an air-cooled heat pump unit, an electric boiler, a heating circulating water pump, valve assemblies, and a water piping network connecting all components; the valve assemblies are used to enable the water piping network to form multiple fluid-connected circulation loops through combinations of different on / off states, and the circulation loops include at least: First circulation loop: The heating circulating water pump, the air-cooled heat pump unit and the heat exchange terminal are connected in series to form an independent heating path for the air-cooled heat pump. Second circulation loop: The heating circulating water pump, electric boiler and heat exchange terminal are connected in series to form an independent heating path for the electric boiler; The third circulation loop: the heating circulating water pump is connected to the heat exchange terminal, and is simultaneously connected in parallel with the air-cooled heat pump unit and the electric boiler to form a parallel coupled heating path; The fourth circulation loop: the heating circulating water pump, the air-cooled heat pump unit, the electric boiler and the heat exchange terminal are connected in series to form a series-coupled heating path.

2. The heating system of the air-cooled heat pump coupled to the electric boiler according to claim 1, characterized in that, It also includes a hot water storage tank, and through combinations of different on / off states of the valve assembly, the water pipe network can also be configured as follows: Fifth circulation loop: The heating circulating water pump, the air-cooled heat pump unit and the hot water storage tank are connected in series to form the first heat storage path; the heating circulating water pump, the electric boiler and the hot water storage tank are connected in series to form the second heat storage path; the second heat storage path is used to relay heat the hot water storage tank that has been preheated by the first heat storage path, and the two are combined to form a relay heat storage and heating path.

3. The heating system of the air-cooled heat pump coupled to the electric boiler according to claim 1, characterized in that, It also includes a water tank and a hot water pump. Through combinations of different on / off states of the valve assembly, the water pipe network can also be configured as follows: The sixth circulation loop: the water tank hot water pump, the hot water storage tank and the heat exchange terminal are connected in series to form a heat release path.

4. The heating system of the air-cooled heat pump coupled to the electric boiler according to claim 1, characterized in that, The valve assembly is a combination of multiple independently installed solenoid valves, electric valves, or manual valves.

5. The heating system of the air-cooled heat pump coupled to the electric boiler according to claim 2, characterized in that, The circulating water outlet of the heat exchange terminal is connected to the inlet of the heating circulating water pump via a first valve. The outlet of the heating circulating water pump is divided into at least two branches. One branch is connected to the inlet of the air-cooled heat pump unit via a second valve, and the other branch is connected to the inlet of the electric boiler via a third valve. The hot water outlet of the air-cooled heat pump unit is connected to the hot water inlet of the heat exchange terminal via a fourth and a fifth valve. The hot water outlet of the electric boiler is connected to the hot water inlet of the heat exchange terminal via a sixth and the fifth valve. The hot water outlet of the air-cooled heat pump unit is also connected to the inlet of the electric boiler via a seventh valve.

6. The heating system of the air-cooled heat pump coupled to the electric boiler according to claim 5, characterized in that, The heat storage inlet of the hot water storage tank is connected to the pipeline between the fourth and fifth valves via the eighth valve; the heat storage outlet of the hot water storage tank is connected to the inlet of the heating circulating water pump via the ninth valve.

7. The heating system of the air-cooled heat pump coupled to the electric boiler according to claim 3, characterized in that, The circulating water outlet of the heat exchange terminal is connected to the heat release inlet of the hot water storage tank via the water tank hot water pump and the tenth valve; the heat release outlet of the hot water storage tank is connected to the hot water inlet of the heat exchange terminal via the eleventh valve.

8. The heating system of the air-cooled heat pump coupled to the electric boiler according to claim 5, characterized in that, The air-cooled heat pump unit, heating circulating water pump, second valve, fourth valve, first valve, and fifth valve are connected by pipelines to form the independent heating path of the air-cooled heat pump; the electric boiler, heating circulating water pump, third valve, sixth valve, first valve, and fifth valve are connected by pipelines to form the independent heating path of the electric boiler; the air-cooled heat pump unit, electric boiler, heating circulating water pump, second valve, fourth valve, third valve, sixth valve, first valve, and fifth valve are connected by pipelines to form the parallel coupled heating path; the air-cooled heat pump unit, electric boiler, heating circulating water pump, first valve, second valve, seventh valve, sixth valve, and fifth valve are connected by pipelines to form the series coupled heating path.

9. The heating system of the air-cooled heat pump coupled to the electric boiler according to claim 6, characterized in that, The air-cooled heat pump unit, the hot water storage tank, the heating circulating water pump, the eighth valve, the ninth valve, the second valve, and the fourth valve are connected by pipelines to form the first heat storage passage; the electric boiler, the hot water storage tank, the heating circulating water pump, the eighth valve, the ninth valve, the third valve, and the sixth valve are connected by pipelines to form the second heat storage passage.

10. The heating system of the air-cooled heat pump coupled to the electric boiler according to claim 7, characterized in that, The hot water storage tank, the hot water pump, the tenth valve, and the eleventh valve are connected by pipelines to form the heat release path.

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