A control circuit and system for aquaculture solar and air-source heat pumps

Abstract

This utility model relates to the field of power supply technology for heat pumps used in aquaculture, and particularly to a control circuit and system for solar and air-source heat pumps used in aquaculture. The control circuit for solar and air-source heat pumps used in aquaculture includes: a photovoltaic module, a mains power rectifier and boost converter, a switching module, a voltage detection module, a control module, and a frequency converter module. The output terminals of the photovoltaic module and the mains power rectifier and boost converter are both connected to the input terminal of the switching module. The output terminal of the switching module is connected to the heat pump used in aquaculture via the frequency converter module. The input terminal of the mains power rectifier and boost converter is connected to mains power. The voltage detection module is connected to both the output terminal of the photovoltaic module and the control module. The control terminal of the control module is connected to the switching terminal of the switching module. The switching module includes a first switching state and a second switching state. This utility model's technical solution can utilize solar energy to supplement the energy required by the heat pump used in aquaculture, thereby reducing the consumption of mains power.

Description

Technical Field

[0001] This utility model relates to the field of heat pump power supply technology for aquaculture, and in particular to a control circuit and system for solar and air-source heat pumps used in aquaculture. Background Technology

[0002] Under the major trend of carbon emission control, the promotion and application of energy-saving and consumption-reducing products has accelerated. For example, in the aquaculture industry, heat pumps for aquaculture are used to replace heating methods such as natural gas and coal. Aquaculture heat pumps are highly efficient and energy-saving devices that utilize low-grade heat energy, transferring heat energy from a low-temperature heat source to a high-temperature heat source through a reverse circulation method to achieve cooling and heating functions.

[0003] In related technologies, heat pumps for aquaculture are powered solely by mains electricity. However, aquaculture requires a large volume of water and a significant amount of energy to maintain a constant temperature, resulting in high power consumption of the heat pumps and consequently, high mains electricity consumption. Utility Model Content

[0004] In order to solve the above-mentioned technical problems, or at least partially solve the above-mentioned technical problems, this utility model provides a control circuit and system for a solar and air-source heat pumps for aquaculture, which can utilize solar energy to supplement the energy required by the heat pump for aquaculture, thereby helping to reduce the consumption of mains electricity.

[0005] In a first aspect, this utility model provides a control circuit for a solar and air-source heat pump used in aquaculture, comprising:

[0006] Photovoltaic modules, mains power rectifier boost modules, switching modules, voltage detection modules, control modules, and frequency converter modules;

[0007] The output terminals of the photovoltaic module and the mains rectifier booster module are both connected to the input terminal of the switching module. The output terminal of the switching module is connected to the aquaculture heat pump through the frequency converter module. The input terminal of the mains rectifier booster module is connected to the mains power.

[0008] The voltage detection component is connected to the output terminal of the photovoltaic module and the control component respectively; the control terminal of the control component is connected to the switching terminal of the switching component; the switching component includes a first switching state and a second switching state.

[0009] In one scenario, the switching component is in the first switching state, and the frequency converter module is connected to the photovoltaic module through the switching component; in another scenario, the switching component is in the second switching state, and the frequency converter module is connected to the mains rectifier boost converter through the switching component.

[0010] In some embodiments, when the voltage detection component detects a voltage value greater than or equal to a preset threshold, the control terminal of the control component outputs a first switching signal, and the switching component is in the first switching state;

[0011] When the voltage detection component detects a voltage value less than a preset threshold, the control terminal of the control component outputs a second switching signal, and the switching component is in the second switching state.

[0012] In some embodiments, the switching component includes a first switching element and a second switching element;

[0013] The input terminals of the first switching element and the second switching element are both connected to the input terminal of the switching assembly, and the output terminals of the second switching element and the second switching element are both connected to the output terminal of the switching assembly.

[0014] The control terminals of the first and second switching elements are both connected to the switching terminal of the switching assembly.

[0015] In some embodiments, both the first switching element and the second switching element are transistors.

[0016] In some embodiments, the mains power rectification and boost module includes a rectification module and a boost module;

[0017] The mains power is connected to the switching component in sequence through the rectifier module and the boost module.

[0018] In some embodiments, the solar and air-source heat pump control circuit for aquaculture further includes:

[0019] An EMI filter module is connected between the mains power supply and the mains power rectifier boost assembly.

[0020] In some embodiments, the photovoltaic module includes a plurality of photovoltaic panels arranged in series.

[0021] In some embodiments, the heat pump for aquaculture includes a compressor connected to the frequency converter module.

[0022] Secondly, this utility model also provides a solar and air-source heat pump control system for aquaculture, including the solar and air-source heat pump control circuit for aquaculture as described in the first aspect.

[0023] In some embodiments, the solar and air-source heat pump control system for aquaculture further includes:

[0024] A heat pump for aquaculture, wherein the control circuit for the solar and air-source heat pump for aquaculture supplies power to the heat pump for aquaculture.

[0025] The technical solution provided by this utility model has the following advantages compared with the prior art:

[0026] The control circuit for aquaculture solar and air-source heat pumps provided in this embodiment includes: a photovoltaic module, a mains rectifier and boost converter, a switching module, a voltage detection module, a control module, and a frequency converter module. The output terminals of the photovoltaic module and the mains rectifier and boost converter are both connected to the input terminal of the switching module. The output terminal of the switching module is connected to the aquaculture heat pump via the frequency converter module. The input terminal of the mains rectifier and boost converter is connected to the mains power. The voltage detection module is connected to both the output terminal of the photovoltaic module and the control module. The control terminal of the control module is connected to the switching terminal of the switching module. The switching module includes a first switching state and a second switching state. In the first switching state, the frequency converter module is connected to the photovoltaic module through the switching module. In the second switching state, the frequency converter module is connected to the mains rectifier and boost converter module through the switching module. When supplying power to the aquaculture heat pump, seamless switching between photovoltaic power generation and mains power can be achieved. When solar power generation is sufficient, solar power generation is prioritized to supply power to the aquaculture heat pump; when solar power generation is insufficient, mains power is used to supply power to the aquaculture heat pump. Therefore, solar energy can be used to supplement the energy required by the heat pump for aquaculture, thereby helping to reduce the consumption of mains electricity. Attached Figure Description

[0027] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention.

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 A schematic diagram of the structure of a solar and air-source heat pump control circuit for aquaculture provided in this embodiment of the present invention;

[0030] Figure 2 A schematic diagram of another control circuit for a solar and air-source heat pump used in aquaculture, provided as an embodiment of this utility model;

[0031] Figure 3 A schematic diagram of the structure of another solar and air-source heat pump control circuit for aquaculture provided in this embodiment of the utility model;

[0032] Figure 4A schematic diagram of the structure of another solar and air-source heat pump control circuit for aquaculture provided in this embodiment of the present invention.

[0033] Among them, 10. Photovoltaic module; 11. Mains rectifier and boost module; 111. Rectifier module; 112. Boost module; 12. Switching module; 121. First switching element; 122. Second switching element; 13. Voltage detection module; 14. Control module; 15. Frequency converter module; 16. EMI filter module; 17. Mains power; 18. Heat pump for aquaculture; 181. Compressor. Detailed Implementation

[0034] To better understand the above-mentioned objectives, features, and advantages of this utility model, the solution of this utility model will be further described below. It should be noted that, unless otherwise specified, the embodiments of this utility model and the features thereof can be combined with each other.

[0035] Many specific details are set forth in the following description in order to provide a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some embodiments of the present invention, and not all embodiments.

[0036] The solar and air-source heat pump control circuit for aquaculture provided in this embodiment of the invention can seamlessly switch between photovoltaic power generation and mains power when supplying power to the heat pump. When solar power generation is sufficient, it prioritizes using solar power to supply the heat pump; when solar power generation is insufficient, it uses mains power. Therefore, solar energy can be used to supplement the energy required by the heat pump, thereby reducing the consumption of mains power.

[0037] The control circuit and system for solar and air-source heat pumps used in aquaculture provided in the embodiments of this utility model will be described exemplarily below with reference to the accompanying drawings.

[0038] Figure 1 This is a schematic diagram of a control circuit for a solar and air-source heat pump used in aquaculture, provided as an embodiment of the present invention. Figure 1As shown, the control circuit for aquaculture solar and air-source heat pumps includes: a photovoltaic module 10, a mains power rectifier and boost converter 11, a switching module 12, a voltage detection module 13, a control module 14, and a frequency converter module 15; the output terminal A1 of the photovoltaic module 10 and the output terminal A2 of the mains power rectifier and boost converter 11 are both connected to the input terminal B1 of the switching module 12, and the output terminal B2 of the switching module 12 is connected to the aquaculture heat pump 18 through the frequency converter module 15; the input terminal A3 of the mains power rectifier and boost converter 11 is connected to the mains power 17; the voltage detection module 13 is connected to the output terminal A1 of the photovoltaic module 10 and the control module 14 respectively; the control terminal H of the control module 14 is connected to the switching terminal B3 of the switching module 12; the switching module 12 includes a first switching state and a second switching state;

[0039] In the first switching state, the frequency converter module 15 is connected to the photovoltaic module 10 through the switching component 12; in the second switching state, the frequency converter module 15 is connected to the mains rectifier boost module 11 through the switching component 12, thereby connecting to the mains power 17.

[0040] Specifically, when solar energy is sufficient, the switching component 12 can be controlled by the control component 14 to be in the first switching state. At this time, the frequency converter 15 is connected to the photovoltaic module 10 through the switching component 12, thereby using solar power generation, i.e., photovoltaic power generation, to supply power to the aquaculture heat pump 18. When the photovoltaic power generation is insufficient and cannot meet the voltage requirements of the aquaculture heat pump 18, the switching component 12 can be controlled by the control component 14 to be in the second switching state. At this time, the frequency converter 15 is connected to the mains rectifier booster component 11 through the switching component 12, thereby connecting to the mains power 17, and using the mains power 17 to supply power to the aquaculture heat pump 18.

[0041] The electric rectifier and boost converter 11 rectifies and boosts the connected mains power, as described later. The frequency converter module 15 is equipped with an inverter circuit that converts DC power into AC power with adjustable frequency and voltage to power the aquaculture heat pump 18.

[0042] Therefore, the solar and air-source heat pump control circuit for aquaculture provided in this embodiment of the present invention can achieve seamless switching between photovoltaic power generation and mains power 17 when powering the aquaculture heat pump 18. When solar power generation is sufficient, solar power generation is used first to power the aquaculture heat pump 18, and when solar power generation is insufficient, mains power 17 is used to power the aquaculture heat pump 18.

[0043] In related technologies, the heat pump 18 for aquaculture is powered solely by mains electricity 17. However, aquaculture requires a large volume of water, necessitating significant energy to maintain a constant temperature, resulting in high power consumption for the heat pump 18 and consequently, high power consumption of mains electricity 17. In contrast, this embodiment utilizes photovoltaic power generation. When solar power is abundant, it prioritizes the use of solar energy to power the heat pump 18, supplementing its energy needs and thus reducing power consumption by mains electricity 17.

[0044] The control circuit for aquaculture solar and air-source heat pumps provided in this embodiment includes: a photovoltaic module, a mains rectifier and boost converter, a switching module, a voltage detection module, a control module, and a frequency converter module. The output terminals of the photovoltaic module and the mains rectifier and boost converter are both connected to the input terminal of the switching module. The output terminal of the switching module is connected to the aquaculture heat pump via the frequency converter module. The input terminal of the mains rectifier and boost converter is connected to the mains power. The voltage detection module is connected to both the output terminal of the photovoltaic module and the control module. The control terminal of the control module is connected to the switching terminal of the switching module. The switching module includes a first switching state and a second switching state. In the first switching state, the frequency converter module is connected to the photovoltaic module through the switching module. In the second switching state, the frequency converter module is connected to the mains rectifier and boost converter module through the switching module. When supplying power to the aquaculture heat pump, seamless switching between photovoltaic power generation and mains power can be achieved. When solar power generation is sufficient, solar power generation is prioritized to supply power to the aquaculture heat pump; when solar power generation is insufficient, mains power is used to supply power to the aquaculture heat pump. Therefore, solar energy can be used to supplement the energy required by the heat pump for aquaculture, thereby helping to reduce the consumption of mains electricity.

[0045] In some embodiments, such as Figure 1 As shown, when the voltage detection component 13 detects a voltage value greater than or equal to a preset threshold, the control terminal H of the control component 14 outputs a first switching signal, and the switching component 12 is in the first switching state; when the voltage detection component 13 detects a voltage value less than the preset threshold, the control terminal H of the control component 14 outputs a second switching signal, and the switching component 12 is in the second switching state.

[0046] Specifically, by setting a voltage detection component 13, the voltage value output by the photovoltaic module 10 is detected, and then the voltage detection component 13 outputs the detected voltage value to the control component 14. When the control component 14 obtains that the voltage value output by the photovoltaic module 10 is greater than or equal to a preset threshold, such as 310V, the photovoltaic module 10 generates sufficient power. The control component 14 outputs a first switching signal to the switching terminal B3 of the switching component 12, thereby controlling the switching component 12 to be in the first switching state, so as to realize the supply of power to the aquaculture heat pump 18 through the photovoltaic module 10. When the control component 14 obtains that the voltage value output by the photovoltaic module 10 is less than the preset threshold, such as 310V, the photovoltaic module 10 generates insufficient power. The control component 14 outputs a second switching signal to the switching terminal B3 of the switching component 12, thereby controlling the switching component 12 to be in the second switching state, so as to realize the supply of power to the aquaculture heat pump 18 through the mains power 17.

[0047] In some embodiments, Figure 2 A schematic diagram of another solar and air-source heat pump control circuit for aquaculture provided as an embodiment of this utility model. (See diagram below.) Figure 2 As shown, the switching component 12 includes a first switching element 121 and a second switching element 122;

[0048] The input terminals E1 of the first switching element 121 and the second switching element 122 are both connected to the input terminal B1 of the switching assembly 12, and the output terminals E2 of the second switching element 122 are both connected to the output terminal B2 of the switching assembly 12.

[0049] The control terminal E3 of the first switching element 121 and the control terminal E3 of the second switching element 122 are both connected to the switching terminal B3 of the switching assembly 12.

[0050] Specifically, when the control terminal H of the control component 14 outputs a first switching signal to the switching terminal B3 of the switching component 12, the control terminal E3 of the first switching element 121 receives the first switching signal and the first switching element 121 closes. The control terminal F3 of the second switching element 122 receives the first switching signal and the second switching element 122 opens, thereby enabling the frequency converter module 15 to connect to the photovoltaic module 10 through the switching component 12 and use solar power generation (i.e., photovoltaic power generation) to supply power to the aquaculture heat pump 18. When the control terminal H of the control component 14 outputs a second switching signal to the switching terminal B3 of the switching component 12, the control terminal E3 of the first switching element 121 receives the second switching signal and the first switching element 121 opens. The control terminal F3 of the second switching element 122 receives the second switching signal and the second switching element 122 closes, thereby enabling the frequency converter module 15 to connect to the mains power 17 through the switching component 12 and use the mains power 17 to supply power to the aquaculture heat pump 18.

[0051] For example, both the first switching element 121 and the second switching element 122 are transistors. Specifically, the first switching element 121 is an N-type MOSFET and the second switching element 122 is a P-type MOSFET; or, the first switching element 121 is a P-type MOSFET and the second switching element 122 is an N-type MOSFET. Thus, it is possible to achieve a situation where one of the first switching element 121 and the second switching element 122 is in a closed state, and the other switching element is in an open state.

[0052] In some embodiments, Figure 3 This is a schematic diagram of another control circuit for a solar and air-source heat pump used in aquaculture, provided as an embodiment of the present invention. Figure 3 As shown, the mains power rectifier and boost converter assembly 11 includes a rectifier module 111 and a boost converter module 112; the mains power 17 is connected to the switching assembly 12 in sequence through the rectifier module 111 and the boost converter module 112.

[0053] The rectifier module 111 converts the alternating current (AC) output from the mains power 17 into direct current (DC). Then, the boost module 112 boosts the DC output from the rectifier module 111. For example, the mains power 17 outputs 220V AC to the rectifier module 111, which then outputs 220V DC to the boost module 112, which in turn outputs 310V DC.

[0054] In some embodiments, Figure 4 This is a schematic diagram of another control circuit for a solar and air-source heat pump used in aquaculture, provided as an embodiment of the present invention. Figure 4 As shown, the control circuit for solar and air-source heat pumps used in aquaculture also includes an EMI filter module 16, which is connected between the mains power 17 and the mains power rectifier booster assembly 11.

[0055] Specifically, an EMI filter module 16 is set in the mains power 17 and the mains power rectifier boost component 11. The EMI filter module 16 can filter the electromagnetic noise (such as harmonics and spike pulses) output by the mains power 17 to avoid interference to the circuit.

[0056] In some embodiments, the photovoltaic module 10 includes a plurality of photovoltaic panels (not shown) arranged in series. Therefore, when solar energy is abundant, the power generation of the photovoltaic module 10 can be increased, enabling the photovoltaic module 10 to meet power generation needs.

[0057] In some embodiments, such as Figure 1 As shown, the heat pump 18 for aquaculture includes a compressor 181, which is connected to the frequency converter module 15.

[0058] Specifically, the compressor 181, as the core component of the heat pump 18 for aquaculture, can operate in a wide temperature range to meet different environments and needs. For example, in cold winters, the compressor 181 can start up in low-temperature environments to maintain heating; in summer cooling, it can also operate stably in high-temperature environments to regulate the required temperature.

[0059] Based on the above embodiments, this utility model also provides a solar and air-source heat pump control system for aquaculture, including the solar and air-source heat pump control circuit for aquaculture as described in the above embodiments, and therefore has the same or similar beneficial effects, which will not be repeated here.

[0060] In some embodiments, such as Figures 1 to 4 As shown in any of the figures, the solar and air-source heat pump control system for aquaculture also includes: an aquaculture heat pump 18, and the solar and air-source heat pump control circuit for aquaculture supplies power to the aquaculture heat pump 18.

[0061] Therefore, when powering the heat pump 18 for aquaculture, the photovoltaic power generation and the mains power 17 can be seamlessly switched. When the solar power generation is sufficient, the solar power generation is used first to power the heat pump 18 for aquaculture. When the solar power generation is insufficient, the mains power 17 is used to power the heat pump 18 for aquaculture.

[0062] The terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0063] The above description is merely a preferred embodiment of this utility model and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of this utility model is not limited to the specific combination of the above-described technical features, but also includes other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the aforementioned inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features of the utility model in this utility model that have similar functions.

Claims

1. A control circuit for a solar and air-source heat pump used in aquaculture, characterized in that, include: Photovoltaic modules, mains power rectifier boost modules, switching modules, voltage detection modules, control modules, and frequency converter modules; The output terminals of the photovoltaic module and the mains rectifier booster module are both connected to the input terminal of the switching module. The output terminal of the switching module is connected to the aquaculture heat pump through the frequency converter module. The input terminal of the mains rectifier booster module is connected to the mains power. The voltage detection component is connected to the output terminal of the photovoltaic module and the control component respectively; the control terminal of the control component is connected to the switching terminal of the switching component; the switching component includes a first switching state and a second switching state. In one scenario, the switching component is in the first switching state, and the frequency converter module is connected to the photovoltaic module through the switching component; in another scenario, the switching component is in the second switching state, and the frequency converter module is connected to the mains rectifier boost converter through the switching component.

2. The control circuit for aquaculture solar and air-source heat pumps according to claim 1, characterized in that, The control terminal of the control component outputs a first switching signal, and the switching component is in the first switching state; The control terminal of the control component outputs a second switching signal, and the switching component is in the second switching state.

3. The control circuit for aquaculture solar and air-source heat pumps according to claim 1, characterized in that, The switching component includes a first switching element and a second switching element; The input terminals of the first switching element and the second switching element are both connected to the input terminal of the switching assembly, and the output terminals of the second switching element and the second switching element are both connected to the output terminal of the switching assembly. The control terminals of the first and second switching elements are both connected to the switching terminal of the switching assembly.

4. The control circuit for aquaculture solar and air-source heat pumps according to claim 3, characterized in that, Both the first switching element and the second switching element are transistors.

5. The control circuit for aquaculture solar and air-source heat pumps according to claim 1, characterized in that, The mains power rectifier boost assembly includes a rectifier module and a boost module; The mains power is connected to the switching component in sequence through the rectifier module and the boost module.

6. The control circuit for aquaculture solar and air-source heat pumps according to claim 1, characterized in that, Also includes: An EMI filter module is connected between the mains power supply and the mains power rectifier boost assembly.

7. The control circuit for aquaculture solar and air-source heat pumps according to claim 1, characterized in that, The photovoltaic module includes multiple photovoltaic panels arranged in series.

8. The control circuit for aquaculture solar and air-source heat pumps according to claim 1, characterized in that, The heat pump for aquaculture includes a compressor, which is connected to the frequency converter module.

9. A solar and air-source heat pump control system for aquaculture, characterized in that, Includes the solar and air-source heat pump control circuit for aquaculture as described in any one of claims 1-8.

10. The solar and air-source heat pump control system for aquaculture according to claim 9, characterized in that, Also includes: A heat pump for aquaculture, wherein the control circuit for the solar and air-source heat pump for aquaculture supplies power to the heat pump for aquaculture.

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