CN206496399U - An intelligently controlled solar and air source heat pump combined operation centralized hot water supply system - Google Patents

Abstract

The utility model discloses a kind of solar energy of intelligent control and air source heat pump cooperation central hot water supply system, belong to hot water supply field.Hot water supply system of the present utility model, intake pump distinguishes running water in input air source source pump and solar water heater, the delivery port of net for air-source heat pump units and solar water heater is respectively connecting to water admixing device, water admixing device is connected to water storage tank, water storage tank is respectively connecting to net for air-source heat pump units and solar water heater by water circulating pump, and water storage tank is connected to user terminal by using water pump；Control system includes controller, data acquisition module and thermal source control module, and controller detects that obtained temperature information selects the mode of operation of thermal source control module and adjusts the output flow of water admixing device according to data acquisition module.The utility model is using control system intelligent optimization net for air-source heat pump units and the mode of operation of solar water heater, in the case where ensureing stable offer hot water, fully the cost of reduction production hot water.

Description

An intelligently controlled solar and air source heat pump combined operation for centralized hot water supply system

technical field

The utility model relates to a hot water supply system, in particular to an intelligently controlled solar and air source heat pump combined operation centralized hot water supply system.

Background technique

With the continuous improvement of living standards, people's demand for hot water supply continues to increase. Centralized supply of hot water is widely used in civil buildings and commercial service industries, such as swimming pools, school apartments, shopping malls, hotels, etc., all need centralized supply of hot water. The energy-saving and environmentally friendly new energy hot water supply system has a wide range of application markets, and more and more welcomed by users.

Conventional solar water heating products are obviously affected by the weather, and cannot work in rainy days, snowy days, and nights. In many areas of our country, the working time of electric auxiliary devices for solar water heaters exceeds 40%, so its practical application and energy-saving effects are affected. big impact.

The air source heat pump water heater is a new type of hot water production device, which can absorb a large amount of heat energy from the ambient low temperature heat source, and produce hot water after the heat pump cycle. The air source heat pump system generally consists of four parts: a compressor, a condenser, a throttling device, and an evaporator. When hot water is produced, the low-temperature and low-pressure liquid working medium entering the evaporator evaporates in the evaporator and absorbs the air in the external environment. The heat becomes low-temperature and low-pressure steam and enters the compressor; the gaseous working medium is compressed by the compressor, becomes high-temperature and high-pressure steam and then enters the condenser; The heat and electric energy absorbed in the cooling water are transferred to the cold water; the condensed high-pressure liquid heat pump working medium is reduced in pressure by the throttling expansion device, and then enters the evaporator to start the next thermodynamic cycle, so as to achieve the purpose of continuously producing hot water.

The air source heat pump water heater has the characteristics of high heating efficiency, good safety performance, long service life and convenient installation. It has a strong ability to adapt to the environment and climate, and is almost not affected by the weather. 24-hour production and supply of hot water. But in spring, summer and autumn when the weather is sunny, the economical efficiency of solar water heating products is more significant.

After searching, the technical scheme of combined heating of solar energy and air source heat pump has been disclosed in the prior art, but the following defects exist in the prior art scheme:

1) The air source heat pump is used as the auxiliary heating device of the solar water heater. After the air source heat pump is involved, the hot water produced by the air source heat pump and the solar water heater is generally mixed directly into the domestic water tank or intermediate tank. Due to the production of the air source heat pump and the solar water heater Different from hot water, this mixing method cannot adjust and control the water temperature, so the temperature stability of the hot water supply is poor;

2) Since the hot water produced by the air source heat pump and the solar water heater cannot change the mixing ratio well according to the water temperature during the mixing process, it is easy to cause the hot water to reach the set temperature for a long time, thus increasing the intervention time of the air source heat pump, resulting in Power consumption increases.

Contents of the invention

1. The technical problems to be solved by the utility model

The purpose of this utility model is to overcome the above-mentioned deficiencies existing in the combined heating system of solar energy and air source heat pump, and provide an intelligently controlled solar energy and air source heat pump combined operation centralized hot water supply system. The control system intelligently optimizes the working mode of air source heat pump units and solar water heaters, fully reduces the cost of hot water production and saves electricity while ensuring stable hot water supply; moreover, the hot water produced by air source heat pump units and solar water heaters first Collected into the water mixing device, the control system intelligently optimizes the mixing ratio of the water mixing device according to the water temperature, achieving the effect of stabilizing the water temperature and making the temperature control more accurate.

2. Technical solution

In order to achieve the above object, the technical solution provided by the utility model is:

An intelligently controlled solar energy and air source heat pump combined operation centralized hot water supply system of the utility model includes a water inlet pump, an air source heat pump unit, a solar water heater, a circulating water pump, a water storage tank, a water pump and a control system, and also includes a flow rate A water mixing device for adjustment and mixing, the air source heat pump unit and the solar water heater are connected in parallel through pipelines, the water inlet pump inputs tap water into the water inlets of the air source heat pump unit and the solar water heater respectively, the air source heat pump unit and the solar water heater The water outlets of the solar water heater are respectively connected to the water mixing device, and the water mixing device is connected to the water inlet of the water storage tank, and the circulating water port of the water storage tank is respectively connected to the air source heat pump unit and the circulating water port of the solar water heater through the circulating water pump , the water outlet of the water storage tank is connected to the user terminal through a water pump; the control system includes a controller, a data acquisition module and a heat source control module, and the controller is electrically connected to the data acquisition module, the heat source control module and the heat source control module respectively. In the water mixing device, the controller selects the working mode of the heat source control module and adjusts the output flow of the water mixing device according to the temperature information detected by the data acquisition module.

Furthermore, it also includes an auxiliary electric heater, the auxiliary electric heater is electrically connected to the controller, the water inlet of the auxiliary electric heater is connected to the water inlet pump, and the water outlet of the auxiliary electric heater is connected to the water inlet of the water storage tank. Shuikou.

Furthermore, the data acquisition module includes an ambient temperature sensor for detecting the ambient temperature, a user-side water temperature sensor for detecting the user-side water temperature, and a water tank water temperature sensor for detecting the water temperature of the water storage tank.

Furthermore, the water pump is also provided with a pressure switch parallel water flow switch for controlling the start and stop of the water pump.

Furthermore, a solenoid valve is also provided on the circuit between the user end and the water storage tank.

Furthermore, the water storage tank is provided with four-stage water level switches for controlling different water levels.

3. Beneficial effect

Adopting the technical solution provided by the utility model, compared with the existing known technology, has the following beneficial effects:

(1) An intelligently controlled solar and air source heat pump joint operation centralized hot water supply system of the utility model, its controller is electrically connected to the data acquisition module, heat source control module and water mixing device, and the air source is intelligently optimized by the control system The working mode of the heat pump unit and the solar water heater fully reduces the cost of producing hot water and saves electricity while ensuring a stable supply of hot water; moreover, the water outlets of the air source heat pump unit and the solar water heater are respectively connected to the water mixing device, The water mixing device is connected to the water inlet of the water storage tank. The hot water produced by the air source heat pump unit and the solar water heater is first collected into the water mixing device and mixed in the water mixing device. At the same time, the control system intelligently optimizes the temperature of the water mixing device according to the water temperature. The mixing ratio achieves the effect of stabilizing the water temperature, and the temperature control is more precise;

(2) An intelligently controlled solar energy and air source heat pump joint operation centralized hot water supply system of the present invention also includes an auxiliary electric heater, the auxiliary electric heater is electrically connected to the controller, and the water inlet of the auxiliary electric heater Connect the water inlet pump, and the water outlet of the auxiliary electric heater is connected to the water inlet of the water storage tank. When the ambient temperature is lower than a certain set value, the auxiliary electric heater can produce hot water to ensure stable heat supply in various environments and climates. Water, especially in winter low temperature conditions, stable and reliable operation;

(3) An intelligently controlled solar energy and air source heat pump joint operation centralized hot water supply system of the present invention, its data acquisition module includes an ambient temperature sensor for detecting the ambient temperature, and a user-side water temperature sensor for detecting the user-side water temperature The sensor and the water tank water temperature sensor used to detect the water temperature of the water storage tank realize the real-time detection of the hot water supply system and provide a reliable basis for the control system to comprehensively judge the working plan of the air source heat pump unit, solar water heater and auxiliary electric heater;

(4) An intelligently controlled solar energy and air source heat pump joint operation centralized hot water supply system of the utility model, the water pump is also provided with a pressure switch for controlling the start and stop of the water pump and a parallel water flow switch, which is convenient for the water booster pump automatic control;

(5) An intelligently controlled solar energy and air source heat pump joint operation centralized hot water supply system of the present invention has a solenoid valve on the circuit between the user end and the water storage tank. By opening the solenoid valve, the water pump can be turned on Circulate the cold water in the user end pipeline to the water storage tank, reduce the amount of cold water released by the user end, and reduce the waste of water resources;

(6) An intelligently controlled solar and air source heat pump combined operation centralized hot water supply system of this utility model has a four-stage water level switch for controlling different water levels in the water storage tank, which is convenient for controlling the water volume in the water storage tank , convenient and timely replenishment of water.

Description of drawings

Fig. 1 is a schematic diagram of the principle of a centralized hot water supply system of an intelligently controlled solar and air source heat pump of the present invention;

Fig. 2 is a schematic diagram of the principle of the control system in the present invention.

Explanation of the labels in the schematic diagram:

1. Globe valve; 2. Filter; 3. Inlet pump; 4. Air source heat pump unit; 5. Solar water heater; 6. Auxiliary electric heater; 7. Water mixing device; 8. Water flow switch; 9. Circulating water pump; 10. Water storage tank; 11. Cleaning valve; 12. Water pump; 13. Pressure switch connected in parallel with water flow switch; 14. Solenoid valve.

detailed description

In order to further understand the content of the utility model, the utility model is described in detail in conjunction with the accompanying drawings and embodiments.

Example

As shown in Figure 1 and Figure 2, an intelligently controlled solar energy and air source heat pump joint operation centralized hot water supply system of this embodiment includes a water inlet pump 3, an air source heat pump unit 4, a solar water heater 5, a circulating water pump 9, The water storage tank 10, the water pump 12, the control system, and the water mixing device 7 with flow regulation and mixing functions, the air source heat pump unit 4 and the solar water heater 5 are connected in parallel through pipelines, that is, the air source heat pump unit 4 and the solar water heater 5 are connected in parallel. The water outlets are respectively connected to the water inlet pump 3, the water outlets of the air source heat pump unit 4 and the solar water heater 5 are respectively connected to the water mixing device 7, and the water inlet pump 3 respectively inputs tap water into the water inlets of the air source heat pump unit 4 and the solar water heater 5. After being heated in the source heat pump unit 4 and the solar water heater 5, the water outlets of the air source heat pump unit 4 and the solar water heater 5 respectively flow into the water mixing device 7, and after being fully mixed in the water mixing device 7, flow into the water mixing device 7 and connect In the water storage tank 10, the circulating water port of the water storage tank 10 is connected to the circulating water port of the air source heat pump unit 4 and the solar water heater 5 respectively through the circulating water pump 9. The water is circulated again to the air source heat pump unit 4 and the solar water heater 5 for heating, and the water outlet of the water storage tank 10 is connected to the user end through the water pump 12 . As shown in Figure 2, the control system includes a controller, a data acquisition module, and a heat source control module. The controller is electrically connected to the data acquisition module, the heat source control module, and the water mixing device 7 respectively. 10 temperature parameters such as water temperature and ambient temperature, the heat source control module can control the solar water heater 5 to work alone, and can also control the solar water heater 5 and the air source heat pump unit 4 to work at the same time, and the controller selects heat source control according to the temperature information detected by the data acquisition module The working mode of the module and the output flow of the water mixing device 7 are adjusted.

An intelligently controlled solar and air source heat pump joint operation centralized hot water supply system in this embodiment, the air source heat pump unit 4 and the solar water heater 5 are jointly operated, and an intelligent control system is adopted to centrally provide hot water to a certain number of users , such as high-end residences, office buildings, hotel rooms, hospital wards, student dormitories, etc.; considering that the solar water heater 5 cannot work in rainy days, snowy days, and nights, an air source heat pump unit 4 is introduced to form an air source heat pump + solar water heater The combined system can provide hot water stably in more environments and climates; at the same time, in the hot water supply system, the intelligent control system is used to ensure the stable production of hot water and the best energy-saving effect, which enhances the original The solar water heating system has the ability to adapt to the environment and climate, and at the same time is more energy-saving and environmentally friendly.

The above-mentioned water mixing device 7 not only has the function of flow adjustment, but also has the function of hot water mixing, and can realize timely adjustment of water supply from different heat sources. After the controller calculates the collected data, it transmits signals to the water mixing device 7 according to the preset control strategy , to control the output flow to achieve the effect of stabilizing the water temperature. The water mixing device 7 can adopt two flow regulating valves and a section of mixing channel. The water outlets of the air source heat pump unit 4 and the solar water heater 5 are respectively connected with a flow regulating valve, and the two flow regulating valves are controlled by the controller. The water temperature on the user side and the water temperature in the water storage tank 10, as well as the instant heating efficiency of the air source heat pump unit 4 and the solar water heater 5, control the flow ratio of the two flow regulating valves, so that the hot water can reach the set temperature after mixing, which is convenient for accurate hot water temperature control. The water mixing device 7 with the functions of flow regulation and hot water mixing is not limited to the structure described above, and can also be realized by other existing technical means, so details will not be repeated here.

As shown in Figure 1, since the air source heat pump unit 4 cannot effectively provide hot water under low temperature conditions, in this embodiment, an auxiliary electric heater 6 is also included, and the auxiliary electric heater 6 is also electrically connected to the controller. The water inlet of the heater 6 is connected to the water inlet pump 3, and the water outlet of the auxiliary electric heater 6 is connected to the water inlet of the water storage tank 10. When the ambient temperature is lower than a certain set value, the auxiliary electric heater 6 can produce hot water to ensure more It can provide hot water stably in all kinds of environmental climates, especially in low temperature conditions in winter. The bottom of the water storage tank 10 is also provided with a cleaning valve 11 to facilitate the drainage of the water storage tank 10 . The water pump 12 is also provided with a pressure switch parallel water flow switch 13 for controlling the start and stop of the water pump 12, which is convenient for the automatic control of the water booster pump. The front end of the circulating water pump 9 is also provided with a water flow switch 8 . There is also a water return circuit between the user end and the water storage tank 10, and a solenoid valve 14 is also provided on this circuit. By opening the solenoid valve 14, the cold water in the user end pipeline can be circulated to the water storage tank 10 after the water pump 12 is turned on. In the process, reduce the amount of cold water released from the user end and reduce the waste of water resources. In addition, the water storage tank 10 is also provided with four-stage water level switches for realizing different water level control, such as S1, S2, S3 and S4 shown in FIG. In order to control the hot water supply system, a stop valve 1 and a filter 2 can also be arranged at the front end of the water inlet pump 3 .

As shown in Figure 2, in this embodiment, the data acquisition module includes an ambient temperature sensor for detecting the ambient temperature, a user-side water temperature sensor for detecting the user-side water temperature, and a water tank water temperature sensor for detecting the water temperature of the water storage tank 10, Through the above-mentioned data acquisition module, the real-time detection of the hot water supply system is realized, which provides a reliable basis for the control system to comprehensively judge the working plans of the air source heat pump unit 4, solar water heater 5 and auxiliary electric heater 6, and is convenient for the controller to perform calculations and Comprehensive judgment. The heat source control module adopts a priority comprehensive control strategy, that is, the solar water heater 5 has priority over the air source heat pump unit 4, and the air source heat pump unit 4 has priority over the auxiliary electric heater 6. Specifically, when the temperature of hot water produced by the solar water heater 5 cannot reach When the temperature is set, the air source heat pump unit 4 is turned on to assist in the production of hot water. When the air source heat pump unit 4 cannot provide hot water with sufficient temperature, the auxiliary electric heater 6 is turned on. At the same time, the output power of the heat source can also be coordinated and controlled to achieve the effect of water temperature stability and energy saving. For example, the air source heat pump unit 4 can use frequency converter and other equipment with adjustable output power. The controller in this embodiment can be a currently popular mainstream controller, such as a programmable controller, an embedded system, a single-chip microcomputer, etc., but is not limited thereto. The water temperature control strategy can use the PID algorithm to compare the collected temperature value with the set value, and then control the heat source and water mixing device, so that the system can reach the set temperature as soon as possible and accurately.

In this embodiment, an intelligently controlled solar and air source heat pump jointly operates a centralized hot water supply system to centrally provide 55°C hot water for users. During operation, when the temperature at the outlet of the solar water heater 5 is higher than a certain set value, the controller will compare the collected temperature value with the set value. At this time, the air source heat pump unit 4 does not need to work, so as to achieve the best energy-saving effect and make full use of Solar energy generates hot water, reducing the cost of hot water production; when the outlet temperature of the solar water heater 5 is lower than a certain set value, the controller compares the collected temperature value with the set value, and at this time the air source heat pump unit 4 needs to work, according to the temperature difference Adjust the output power so that the outlet temperature of the water mixing device 7 is higher than a certain set value; when the ambient temperature is lower than a certain set value, the controller compares the collected temperature value with the set value, and the auxiliary electric heater 6 Work, adjust the output power according to the temperature difference, so as to realize that the temperature in the water storage tank 10 is higher than a certain set value. When the circulating water pump 9 is not in use, direct heating can also be used to produce hot water.

An intelligently controlled solar energy and air source heat pump joint operation centralized hot water supply system of the utility model uses the control system to intelligently optimize the working mode of the air source heat pump unit and solar water heater, and fully reduces the The cost of producing hot water saves electricity; moreover, the hot water produced by the air source heat pump unit and the solar water heater is first collected into the water mixing device, and the control system intelligently optimizes the mixing ratio of the water mixing device according to the water temperature, achieving the effect of stabilizing the water temperature , the temperature control is more precise; at the same time, it enhances the ability of the original solar water heating system to adapt to the environment and climate, and is more energy-saving and environmentally friendly.

The above has schematically described the utility model and its implementation, which is not restrictive, and what is shown in the drawings is only one of the implementation of the utility model, and the actual structure is not limited thereto. Therefore, if a person of ordinary skill in the art is inspired by it, without departing from the purpose of the utility model, without creatively designing a structural method and embodiment similar to the technical solution, all should belong to the utility model protected range.

Claims (6)

1. the solar energy and air source heat pump cooperation central hot water supply system of a kind of intelligent control, including intake pump (3), Net for air-source heat pump units (4), solar water heater (5), water circulating pump (9), water storage tank (10), with water pump (12) and control be System, it is characterised in that：Also include the water admixing device (7) with Flow-rate adjustment and immixture, described net for air-source heat pump units (4) it is connected in parallel with solar water heater (5) by pipeline, running water is distinguished input air source heat by described intake pump (3) The delivery port of the water inlet of pump assembly (4) and solar water heater (5), net for air-source heat pump units (4) and solar water heater (5) Water admixing device (7) is respectively connecting to, described water admixing device (7) is connected to the water inlet of water storage tank (10), described water storage tank (10) the circulation mouth of a river is respectively connecting to following for net for air-source heat pump units (4) and solar water heater (5) by water circulating pump (9) The ring mouth of a river, the delivery port of described water storage tank (10) is connected to user terminal by using water pump (12)；Described control system includes Controller, data acquisition module and thermal source control module, described controller are electrically connected data acquisition module, thermal source control Module and water admixing device (7), controller detect that obtained temperature information selects thermal source control module according to data acquisition module The output flow of mode of operation and regulation water admixing device (7).

2. the solar energy and air source heat pump cooperation central hot water supply of a kind of intelligent control according to claim 1 System, it is characterised in that：Also include electrical auxiliary heater (6), described electrical auxiliary heater (6) is electrically connected with the controller, institute The water inlet connection intake pump (3) for the electrical auxiliary heater (6) stated, the delivery port connection water storage tank of electrical auxiliary heater (6) (10) water inlet.

3. the solar energy and air source heat pump cooperation central hot water supply of a kind of intelligent control according to claim 2 System, it is characterised in that：Described data acquisition module includes being used to detect the environment temperature sensor of environment temperature, for examining Survey the user side cooling-water temperature sensor of user side water temperature and the water tank cooling-water temperature sensor for detecting water storage tank (10) water temperature.

4. the solar energy and air source heat pump cooperation central hot water supply of a kind of intelligent control according to claim 3 System, it is characterised in that：Described being additionally provided with water pump (12) place is in parallel for the pressure switch of control water pump (12) start and stop Water flow switch (13).

5. the solar energy and air source heat pump cooperation central hot water supply of a kind of intelligent control according to claim 4 System, it is characterised in that：Described user terminal on the loop of water storage tank (10) with being additionally provided with magnetic valve (14).

6. the solar energy and air source heat pump cooperation central hot water supply of a kind of intelligent control according to claim 5 System, it is characterised in that：The four-part form water level switch for being used for realizing different water level controls is provided with described water storage tank (10).