Intelligent energy-saving control device of air source heat pump water heater

Abstract

The utility model belongs to the technical field of water heaters, and particularly relates to an intelligent energy-saving control device of an air source heat pump water heater, which comprises at least two groups of air source heat pumps, a solar water heating device, a constant-temperature water tank and a water mixing tank, a first circulating pipeline is arranged between the first group of air source heat pumps and the constant-temperature water tank through a second heat collection circulating pump, and the constant-temperature water tank is used for providing constant-temperature hot water outwards; a second circulating pipeline is arranged between the second group of air source heat pumps and the water mixing tank through the first heat collection circulating pump; a third circulating pipeline is arranged between the solar water heating device and the constant-temperature water tank and between the solar water heating device and the mixed water tank through a third heat collection circulating pump; at least two groups of water level control pipelines and a water supply pump are arranged between the constant-temperature water tank and the water mixing water tank, and the water supply pump is used for providing tap water for the constant-temperature water tank and the water mixing water tank; the energy-saving effect is achieved by reducing the working time of the air source heat pump unit and utilizing free solar energy for heating to the maximum extent.

Description

Technical Field

[0001] The utility model belongs to the technical field of water heaters, and in particular relates to an intelligent energy-saving control device for an air source heat pump water heater. Background Art

[0002] The air source heat pump hot water system is a device that uses the heat in the air as a heat source and transfers the heat to the water through a heat pump unit to achieve hot water supply. This system has the advantages of high efficiency, environmental protection, and energy saving, and is widely used in home, commercial, and industrial fields. However, the operation of the air source heat pump hot water system requires precise control to ensure the efficient operation and energy saving effect of the system. In the air source heat pump hot water system, PLC control technology is widely used in the automatic control of equipment to improve the operating efficiency and stability of the system. Energy-saving control technology refers to a technology that optimizes the use of energy, reduces energy consumption, and improves energy utilization. In the air source heat pump hot water system, the application of energy-saving control technology can effectively reduce the energy consumption of the system and improve the economic benefits of the system.

[0003] Although the existing air source heat pump hot water system has adopted PLC control technology and solar energy auxiliary heat source, there are still some problems and shortcomings in actual operation. First, the existing control system can only control a single heat pump unit and cannot achieve coordinated control of multiple heat pump units, which limits the operating efficiency of the system to a certain extent. Secondly, the existing control system does not fully utilize energy. For example, it is impossible to dynamically adjust the operating status of the system according to the actual water demand, resulting in energy waste. Finally, the existing control system is insufficient in the ability to diagnose and predict equipment faults, and is unable to detect and handle equipment faults in a timely manner, affecting the normal operation of the system. Utility Model Content

[0004] 1. Technical issues to be solved

[0005] The utility model aims at the above defects existing in the prior art and specially proposes an intelligent energy-saving control device for air source heat pump water heater, which solves the problem of how to dynamically adjust the operating state of the system according to actual water demand and reduce energy waste.

[0006] 2. Technical Solution

[0007] In order to solve the above technical problems, the utility model provides an intelligent energy-saving control device for an air source heat pump water heater, and the intelligent energy-saving control device for an air source heat pump water heater comprises:

[0008] At least 2 sets of air source heat pumps, solar water heating devices, constant temperature water tanks and mixing water tanks;

[0009] A first circulation pipeline is provided between the first group of air source heat pumps and the constant temperature water tank through the second heat collection circulation pump, and the constant temperature water tank is used to provide constant temperature hot water to the outside; a second circulation pipeline is provided between the second group of air source heat pumps and the mixing water tank through the first heat collection circulation pump; a solar water heating device, a third circulation pipeline is provided between the solar water heating device and the constant temperature water tank and the mixing water tank through the third heat collection circulation pump; at least two groups of water level control pipelines are provided between the constant temperature water tank and the mixing water tank, the water temperature of the constant temperature water tank is higher than that of the mixing water tank, and the temperature difference between the water temperature of the constant temperature water tank and the water temperature of the mixing water tank is 5℃~10℃;

[0010] Water supply pump, which is used to provide tap water to the constant temperature water tank and the mixing water tank;

[0011] The control cabinet is used for controlling air source heat pumps, solar water heating devices, heat collection circulation pumps, and solenoid valves for pipeline control provided in pipelines. The control cabinet includes a remote control module, and the mobile terminal or computer terminal communicates with the control cabinet through the remote control module.

[0012] A temperature sensor is provided in the constant temperature water tank. The water temperature detected by the temperature sensor is T1. When T1≤52℃, the first heat collection circulation pump and the second group of air source heat pumps operate for heating; when T1≥55℃, the first heat collection circulation pump and the second group of air source heat pumps stop working;

[0013] A temperature sensor is installed in the mixing water tank. The water temperature detected by the temperature sensor is T2. When T2≤47℃, the second heat collection circulation pump and the first air source heat pump start to heat. When T2≥52℃, the water pump P3 and the heat pump unit stop working.

[0014] A temperature sensor is provided in the pipeline where the water supply pump is located. The temperature detected by the temperature sensor is T7. When T7 is less than 3°C, the first heat collection circulation pump starts; when T7 is greater than or equal to 15°C, the first heat collection circulation pump stops working.

[0015] The water supply pump, the first heat collection circulation pump, the second heat collection circulation pump and the third heat collection circulation pump are all equipped with spare pipelines and rotate to work every 24 hours.

[0016] A temperature sensor is provided in the pipeline where the pressure transmitter for providing constant temperature hot water is located. The temperature detected by the temperature sensor is T8. When T8 is less than 3°C, the second heat collection circulation pump starts; when T8 is greater than or equal to 15°C, the second heat collection circulation pump stops working.

[0017] The outlet pipe of the solar water heater is provided with a temperature sensor, and the temperature detected by the temperature sensor is T5. The inlet pipe of the solar water heater is provided with a temperature sensor, and the temperature detected by the temperature sensor is T6.

[0018] When T5-T6≥7℃, or T5-T2≥7℃, the third heat collection circulation pump starts; when T5-T6<2℃, or T5-T2<2℃, the third heat collection circulation pump stops working;

[0019] When T6<3℃, the third heat collection circulation pump starts; when T6≥15℃, the third heat collection circulation pump stops working.

[0020] The solar water heating device is powered on at a predetermined time or under a certain light intensity through timing or light-sensitive control.

[0021] It also includes a third group of air source heat pumps, which can be used as a backup heat pump for the second group of air source heat pumps, or the second group of air source heat pumps and the third group of air source heat pumps can be used simultaneously to heat water in the mixing tank.

[0022] The first water tank and the second water tank are both provided with a liquid level sensor or a liquid level meter for water level detection. The water supply pump starts to supply water when the liquid level in the water tank is lower than a preset height H1, and shuts down when the liquid level in the water tank is higher than a preset height H2, H1<H2.

[0023] When the intelligent energy-saving control device of the air source heat pump water heater supplies hot water in the energy-saving state, it first provides constant temperature hot water to the outside through the constant temperature water tank. After the water level of the constant temperature water tank drops below the first water level control pipeline at the top, water is then supplied to the constant temperature water tank through the mixing water tank.

[0024] When the water level in the thermostatic water tank reaches the second water level control pipeline in the middle, the mixing water tank and the thermostatic water tank provide constant temperature hot water to the outside;

[0025] When the water level in the thermostatic water tank continues to drop to the preset water level, tap water enters the mixing water tank through the water supply pump, and the hot water at the bottom of the mixing water tank is pushed to the thermostatic water tank through the third water level control pipeline at the bottom.

[0026] 3. Beneficial Effects

[0027] Compared with the prior art, the intelligent energy-saving control device for an air source heat pump water heater proposed in the utility model can achieve energy-saving effect by minimizing the working time of the air source heat pump unit and utilizing free solar energy heating to the maximum extent;

[0028] Specifically, solar radiation sensors are used to determine the intensity of sunlight; combined with the increase in water temperature, the start-up time of the air source heat pump is intelligently determined, that is, the latest start-up time is guaranteed while ensuring the hot water supply temperature requirements, thereby maximizing the use of solar energy.

[0029] In addition, in the energy-saving state, constant temperature hot water is provided to the outside through the constant temperature water tank. After the water level in the constant temperature water tank drops below the first water level control pipeline in the upper part, water is supplied to the constant temperature water tank through the mixing water tank; when the water level in the constant temperature water tank 5 reaches the second water level control pipeline in the middle, constant temperature hot water is provided to the outside by the mixing water tank and the constant temperature water tank; when the water level in the constant temperature water tank continues to drop to the preset water level, tap water enters the mixing water tank through the water supply pump, and the hot water at the bottom of the mixing water tank is pushed to the constant temperature water tank through the third water level control pipeline at the bottom. In this state, it is generally the peak water consumption at night. According to the estimated water consumption, the heat pump generally does not need to be started, and the hot water supply basically meets the daily design maximum water consumption, that is, all daytime solar hot water is used. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A schematic diagram of the structure of an intelligent energy-saving control device for an air source heat pump water heater Figure 1 .

[0031] Figure 2 A schematic diagram of the structure of an intelligent energy-saving control device for an air source heat pump water heater Figure 2 .

[0032] In the figure:

[0033] 1 is the first group of air source heat pumps; 2 is the second group of air source heat pumps; 3 is the third group of air source heat pumps; 4 is a solar water heating device; 5 is a constant temperature water tank; 6 is a mixing water tank; 7 is a water supply pump; 8 is a first heat collection circulation pump; 9 is a second heat collection circulation pump; 10 is a third heat collection circulation pump; 11 is a first circulation pipeline; 12 is a second circulation pipeline; 13 is a third circulation pipeline; 14 is a first water level control pipeline; 15 is a second water level control pipeline; 16 is a third water level control pipeline; 17 is a control cabinet; 18 is a pressure transmitter. DETAILED DESCRIPTION

[0034] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0035] Combination Figure 1 , Figure 2 As shown, the intelligent energy-saving control device for the air source heat pump water heater of this embodiment includes at least two groups of air source heat pumps, a solar water heater 4, a constant temperature water tank 5 and a mixing water tank 6;

[0036] A first circulation pipeline 11 is provided between the first group of air source heat pumps 1 and the constant temperature water tank 5 through the second heat collection circulation pump 9, and the constant temperature water tank 5 is used to provide constant temperature hot water to the outside; a second circulation pipeline 12 is provided between the second group of air source heat pumps 2 and the mixing water tank 6 through the first heat collection circulation pump 8; a solar water heating device 4, a third circulation pipeline 13 is provided between the solar water heating device 4 and the constant temperature water tank 5 and the mixing water tank 6 through the third heat collection circulation pump 10; at least two groups of water level control pipelines are provided between the constant temperature water tank 5 and the mixing water tank 6, the water temperature of the constant temperature water tank 5 is higher than that of the mixing water tank 6, and the temperature difference between the water temperature of the constant temperature water tank 5 and the water temperature of the mixing water tank 6 is 5°C to 10°C;

[0037] A water supply pump 7, the water supply pump 7 is used to provide tap water to the constant temperature water tank 5 and the mixing water tank 6;

[0038] The control cabinet 17 is used for controlling the air source heat pump, the solar water heating device 4, the heat collection circulation pump, and the solenoid valves for pipeline control provided in the pipeline. The control cabinet 17 includes a remote control module, and the mobile terminal or the computer terminal communicates with the control cabinet 17 through the remote control module.

[0039] A temperature sensor is provided in the constant temperature water tank 5. The water temperature detected by the temperature sensor is T1. When T1≤52°C, the first heat collection circulation pump 8 and the second group of air source heat pumps 2 are operated for heating; when T1≥55°C, the first heat collection circulation pump 8 and the second group of air source heat pumps 2 stop working;

[0040] A temperature sensor is provided in the mixing water tank 6, and the water temperature detected by the temperature sensor is T2. When T2≤47°C, the second heat collection circulation pump 9 and the first group of air source heat pumps 1 operate for heating; when T2≥52°C, the water pump P3 and the heat pump unit stop working.

[0041] A temperature sensor is provided in the pipeline where the water supply pump 7 is located. The temperature detected by the temperature sensor is T7. When T7 is less than 3°C, the first heat collection circulation pump 8 starts; when T7 is greater than or equal to 15°C, the first heat collection circulation pump 8 stops working, thereby achieving pipeline antifreeze.

[0042] The water supply pump 7, the first heat collection circulation pump 8, the second heat collection circulation pump 9 and the third heat collection circulation pump 10 are all provided with spare pipelines and work in rotation every 24 hours.

[0043] The pipeline where the pressure transmitter 18 that provides constant temperature hot water is located is equipped with a temperature sensor. The temperature detected by the temperature sensor is T8. When T8 is less than 3°C, the second heat collection circulation pump 9 starts; when T8 is greater than or equal to 15°C, the second heat collection circulation pump 9 stops working, thereby achieving pipeline antifreeze.

[0044] The outlet pipe of the solar water heater 4 is provided with a temperature sensor, and the temperature detected by the temperature sensor is T5. The inlet pipe of the solar water heater 4 is provided with a temperature sensor, and the temperature detected by the temperature sensor is T6.

[0045] When T5-T6≥7℃, or T5-T2≥7℃, the third heat collection circulation pump 10 starts; when T5-T6<2℃, or T5-T2<2℃, the third heat collection circulation pump 10 stops working;

[0046] When T6 is less than 3°C, the third heat collection circulation pump 10 starts; when T6 is greater than or equal to 15°C, the third heat collection circulation pump 10 stops working.

[0047] The solar water heater 4 is powered on within a predetermined time or under a certain light intensity through timing or photosensitive control. Specifically, a solar radiation sensor can be used to achieve optimal solar energy utilization.

[0048] It also includes a group three air source heat pump 3, which can be used as a backup heat pump for the group two air source heat pump 2, or the group two air source heat pump 2 and the group three air source heat pump 3 can be used simultaneously for heating water in the mixing tank 6.

[0049] The first water tank and the second water tank are both provided with a liquid level sensor or a liquid level meter for water level detection. The water supply pump 7 starts to supply water when the liquid level in the water tank is lower than a preset height H1, and shuts down when the liquid level in the water tank is higher than a preset height H2. H1<H2. In this embodiment, H1 is 50% of the lower limit of the water level, and H2 is 90% of the upper limit of the water level.

[0050] When the intelligent energy-saving control device of the air source heat pump water heater supplies hot water in the energy-saving state, firstly, constant temperature hot water is provided to the outside through the constant temperature water tank 5, and after the water level of the constant temperature water tank 5 drops below the first water level control pipeline 14 at the upper part, water is then supplied to the constant temperature water tank 5 through the mixing water tank 6;

[0051] When the water level of the thermostatic water tank 5 reaches the second water level control pipeline 15 in the middle, the mixing water tank 6 and the thermostatic water tank 5 provide constant temperature hot water to the outside;

[0052] When the water level of the thermostatic water tank 5 continues to drop to the preset water level, the tap water enters the mixing water tank 6 through the water supply pump 7, and the hot water at the bottom of the mixing water tank 6 is pushed to the thermostatic water tank 5 through the third water level control pipeline 16 at the bottom. In this state, it is usually the peak of water consumption at night. According to the estimated water consumption, the heat pump generally does not need to be started. The hot water supply basically meets the maximum daily design water consumption, that is, all daytime solar hot water is used. When a small number of water consumption increases abnormally, the temperature of the thermostatic water tank and the mixing water tank decreases. At this time, in order to ensure the stability of the hot water in the thermostatic water tank, the first group of air source heat pumps 1 corresponding to the thermostatic water tank starts heating, and the heat pump unit of the mixing water tank does not start. The temperature of the water tank decreases and is heated by solar energy the next day.

[0053] The above are only preferred implementations of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. An intelligent energy-saving control device for an air source heat pump water heater, characterized in that: The intelligent energy-saving control device of the air source heat pump water heater comprises: At least 2 sets of air source heat pumps, solar water heating devices, constant temperature water tanks and mixing water tanks; A first circulation pipeline is provided between the first group of air source heat pumps and the constant temperature water tank through the second heat collection circulation pump, and the constant temperature water tank is used to provide constant temperature hot water to the outside; a second circulation pipeline is provided between the second group of air source heat pumps and the mixing water tank through the first heat collection circulation pump; a solar water heating device, a third circulation pipeline is provided between the solar water heating device and the constant temperature water tank and the mixing water tank through the third heat collection circulation pump; at least two groups of water level control pipelines are provided between the constant temperature water tank and the mixing water tank, the water temperature of the constant temperature water tank is higher than that of the mixing water tank, and the temperature difference between the water temperature of the constant temperature water tank and the water temperature of the mixing water tank is 5°C to 10°C; A water supply pump, the water supply pump is used to provide tap water to the constant temperature water tank and the mixing water tank; A control cabinet is used for controlling an air source heat pump, a solar water heating device, a heat collection circulation pump, and a solenoid valve for pipeline control provided in the pipeline. The control cabinet includes a remote control module, and a mobile terminal or a computer terminal communicates with the control cabinet through the remote control module.

2. According to claim 1, an intelligent energy-saving control device for an air source heat pump water heater is characterized in that: The constant temperature water tank is provided with a temperature sensor, and the water temperature detected by the temperature sensor is T1. When T1≤52°C, the first heat collection circulation pump and the second group of air source heat pumps are operated for heating; when T1≥55°C, the first heat collection circulation pump and the second group of air source heat pumps stop working; A temperature sensor is installed in the mixing water tank. The water temperature detected by the temperature sensor is T2. When T2≤47℃, the second heat collection circulation pump and the first air source heat pump start to heat. When T2≥52℃, the water pump P3 and the heat pump unit stop working.

3. According to claim 2, the intelligent energy-saving control device for an air source heat pump water heater is characterized in that: The pipeline where the water supply pump is located is provided with a temperature sensor, and the temperature detected by the temperature sensor is T7. When T7 is less than 3°C, the first heat collection circulation pump starts; when T7 is greater than or equal to 15°C, the first heat collection circulation pump stops working.

4. The intelligent energy-saving control device for an air source heat pump water heater according to claim 1, characterized in that: The water supply pump, the first heat collection circulation pump, the second heat collection circulation pump and the third heat collection circulation pump are all provided with spare pipelines and work in rotation every 24 hours.

5. The intelligent energy-saving control device for an air source heat pump water heater according to claim 2, characterized in that: The pipeline where the pressure transmitter providing constant temperature hot water is located is provided with a temperature sensor, and the temperature detected by the temperature sensor is T8. When T8 is less than 3°C, the second heat collection circulation pump starts; when T8 is greater than or equal to 15°C, the second heat collection circulation pump stops working.

6. The intelligent energy-saving control device for an air source heat pump water heater according to claim 2, characterized in that: The outlet pipe of the solar water heater is provided with a temperature sensor, and the temperature detected by the temperature sensor is T5. The inlet pipe of the solar water heater is provided with a temperature sensor, and the temperature detected by the temperature sensor is T6. When T5-T6≥7℃, or T5-T2≥7℃, the third heat collection circulation pump starts; when T5-T6<2℃, or T5-T2<2℃, the third heat collection circulation pump stops working; When T6<3℃, the third heat collection circulation pump starts; when T6≥15℃, the third heat collection circulation pump stops working.

7. The intelligent energy-saving control device for an air source heat pump water heater according to claim 1, characterized in that: The solar water heater is powered on within a predetermined time or under a certain light intensity through timing or light-sensitive control.

8. The intelligent energy-saving control device for an air source heat pump water heater according to claim 1, characterized in that: It also includes a third group of air source heat pumps, which can be used as a backup heat pump for the second group of air source heat pumps, or the second group of air source heat pumps and the third group of air source heat pumps can be used simultaneously to heat water in the mixing tank.

9. The intelligent energy-saving control device for an air source heat pump water heater according to claim 1, characterized in that: The first water tank and the second water tank are both provided with a liquid level sensor or a liquid level meter for water level detection. The water supply pump starts to supply water when the liquid level in the water tank is lower than a preset height H1, and shuts down when the liquid level in the water tank is higher than a preset height H2, H1<H2.

10. The intelligent energy-saving control device for an air source heat pump water heater according to claim 1, characterized in that: When the intelligent energy-saving control device of the air source heat pump water heater supplies hot water in the energy-saving state, it first provides constant temperature hot water to the outside through the constant temperature water tank, and after the water level of the constant temperature water tank drops below the first water level control pipeline at the top, water is then supplied to the constant temperature water tank through the mixing water tank; When the water level in the thermostatic water tank reaches the second water level control pipeline in the middle, the mixing water tank and the thermostatic water tank provide constant temperature hot water to the outside; When the water level in the thermostatic water tank continues to drop to the preset water level, tap water enters the mixing water tank through the water supply pump, and the hot water at the bottom of the mixing water tank is pushed to the thermostatic water tank through the third water level control pipeline at the bottom.

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