CN210242036U - Control system of solar heat pump engineering hot water system - Google Patents
Control system of solar heat pump engineering hot water system Download PDFInfo
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- CN210242036U CN210242036U CN201920610689.8U CN201920610689U CN210242036U CN 210242036 U CN210242036 U CN 210242036U CN 201920610689 U CN201920610689 U CN 201920610689U CN 210242036 U CN210242036 U CN 210242036U
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The utility model relates to a solar thermal energy pump engineering technical field, concretely relates to solar thermal energy pump engineering hot water system's control system. The utility model provides a control system of solar heat pump engineering hot water system, which acquires the data of a first temperature sensor, a second temperature sensor, a flowmeter, a water temperature measuring circuit, a water level measuring circuit, an air temperature sensor and a solar energy irradiator through a controller, and knows the condition of the external environment and the working condition of a solar energy collector so as to decide whether to start a heat pump and control the opening and closing of a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve and a relay; the utility model provides a control system principle is simple, and degree of automation is high, is fit for using widely.
Description
Technical Field
The utility model relates to a solar thermal energy pump engineering technical field, concretely relates to solar thermal energy pump engineering hot water system's control system.
Background
The solar water heater heats water from low temperature to high temperature by utilizing a photo-thermal conversion principle to meet the requirements of people on hot water, but the solar water heater gradually shows some defects in practical application, for example, in rainy days and winter with insufficient irradiation quantity, the solar water heater has low heat efficiency and less heat exchange water quantity, and cannot meet the application requirements of four seasons.
A Heat Pump (Heat Pump) is a device for transferring Heat energy from a low-level Heat source to a high-level Heat source, and is also a new energy technology which attracts attention worldwide. It is different from the familiar mechanical equipment-pump which can raise potential energy, and the heat pump usually firstly obtains low-grade heat energy from air, water or soil in the natural world, and then uses electric power to do work, and then provides the high-grade heat energy which can be utilized for people. The solar heat collecting system is combined with the air source heat pump system unit, the air source heat pump system is used as an auxiliary heat source, solar energy resources are fully utilized, the guarantee rate of hot water supply when the solar energy resources are insufficient due to low sunshine hours in rainy days and winter is solved, and hot water can be supplied all the year round. However, at present, a control system capable of fully automatically controlling a solar heat pump engineering hot water system does not exist.
Disclosure of Invention
In order to solve the problem, the utility model provides a control system of solar heat pump engineering hot water system, concrete technical scheme is as follows:
a control system of a solar heat pump engineering hot water system comprises a water inlet pipe, a heat preservation and storage water tank, a solar circulating pump, a solar heat collector, an air source heat pump system, a heat pump circulating pump, a solar heat collector water inlet pipe, a solar heat collector water outlet pipe, an air source heat pump system water inlet pipe, an air source heat pump system water outlet pipe and a user water outlet pipe; tap water enters the heat-preservation and heat-storage water tank through the water inlet pipe, is conveyed to the solar thermal collector through the solar circulating pump and the solar thermal collector water inlet pipe for heating, and is conveyed to the heat-preservation and heat-storage water tank through the solar thermal collector water outlet pipe; when the heat of the solar heat collector cannot heat the water in the heat-insulation and heat-storage water tank to a preset temperature, running water in the heat-insulation and heat-storage water tank enters the air source heat pump system through the water inlet pipe of the air source heat pump system to be heated, and then is conveyed to the heat-insulation and heat-storage water tank through the water outlet pipe of the air source heat pump system; the method is characterized in that: the control system comprises a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve, a controller, a first temperature sensor, a second temperature sensor, a flowmeter, a water temperature measuring circuit, a water level measuring circuit, an air temperature sensor and a solar irradiator;
the first electromagnetic valve is arranged on the water inlet pipe and used for controlling whether water enters or not;
the second electromagnetic valve is arranged on the water outlet pipe of the solar heat collector and is used for controlling whether the water outlet pipe of the heat collector delivers water to the heat preservation and storage water tank or not;
the third electromagnetic valve is arranged on the water outlet pipe of the air source heat pump system and used for controlling whether the water outlet pipe of the air source heat pump system delivers water to the heat preservation and storage water tank or not;
the first temperature sensor is arranged at the joint of the solar heat collector water inlet pipe and the solar heat collector and is used for collecting the temperature of the inlet water of the solar heat collector;
the second temperature sensor is arranged at the joint of the water outlet pipe of the solar thermal collector and is used for collecting the temperature of the outlet water of the solar thermal collector;
the flow meter is arranged on the water inlet pipe of the solar heat collector and is used for collecting the flow entering the solar heat collector;
the water temperature measuring circuit is used for measuring the water temperature condition in the heat preservation and storage water tank;
the water level measuring circuit is used for measuring the water level condition in the heat-preservation and heat-storage water tank;
the air temperature sensor is fixedly arranged on the engineering hot water system of the solar heat pump and is used for collecting the temperature of the outside air;
the solar radiation instrument is fixedly arranged on the solar heat collector and is used for collecting the total solar radiation;
the controller is used for acquiring data of the first temperature sensor, the second temperature sensor, the flowmeter, the water temperature measuring circuit, the water level measuring circuit, the air temperature sensor and the solar irradiator and controlling the first electromagnetic valve, the second electromagnetic valve and the third electromagnetic valve to be opened and closed;
the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve, the first temperature sensor, the second temperature sensor, the flowmeter, the water temperature measuring circuit, the water level measuring circuit, the air temperature sensor and the solar irradiator are respectively connected with the controller.
Preferably, the water level measuring circuit adopts a plurality of steel needles which are respectively arranged at different heights in the heat preservation and storage water tank, and each steel needle is connected with a resistor in series and is respectively connected with a power supply; each steel needle is connected with an electronic switch respectively, the electronic switch is connected with a controller, a power supply provides a bias voltage for a resistor, when a certain steel needle is not in contact with the water surface, the output of the steel needle is high level, and when the steel needle is in contact with the water surface, the output of the steel needle is low level, so that the water level in the heat-preservation and heat-storage water tank can be measured.
Preferably, the water temperature measuring circuit comprises a thermistor and an operational amplifier; the thermistor is connected with the operational amplifier, and the operational amplifier is connected with the controller.
Preferably, the controller employs an STM32 processor.
The utility model has the advantages that: the utility model provides a control system of solar heat pump engineering hot water system, which acquires the data of a first temperature sensor, a second temperature sensor, a flowmeter, a water temperature measuring circuit, a water level measuring circuit, an air temperature sensor and a solar energy irradiator through a controller, and knows the condition of the external environment and the working condition of a solar energy collector so as to decide whether to start a heat pump and control the opening and closing of a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve and a relay; the utility model provides a control system principle is simple, and degree of automation is high, is fit for using widely.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic diagram of a water temperature measuring circuit;
FIG. 3 is a schematic diagram of a water level measuring circuit;
wherein, YV 1: first electromagnetic valve, YV 2: second electromagnetic valve, YV 3: third electromagnetic valve, Rt 1: first temperature sensor, Rt 2: a second temperature sensor.
Detailed Description
For a better understanding of the present invention, the following further description is made in conjunction with the accompanying drawings and the specific embodiments:
as shown in fig. 1, a control system of a solar heat pump engineering hot water system includes a water inlet pipe, a heat preservation and storage water tank, a solar circulating pump, a solar heat collector, an air source heat pump system, a heat pump circulating pump, a solar heat collector water inlet pipe, a solar heat collector water outlet pipe, an air source heat pump system water inlet pipe, an air source heat pump system water outlet pipe, and a user water outlet pipe; tap water enters the heat-preservation and heat-storage water tank through the water inlet pipe, is conveyed to the solar thermal collector through the solar circulating pump and the solar thermal collector water inlet pipe for heating, and is conveyed to the heat-preservation and heat-storage water tank through the solar thermal collector water outlet pipe; when the heat of the solar heat collector cannot heat the water in the heat-insulation and heat-storage water tank to a preset temperature, running water in the heat-insulation and heat-storage water tank enters the air source heat pump system through the water inlet pipe of the air source heat pump system to be heated, and then is conveyed to the heat-insulation and heat-storage water tank through the water outlet pipe of the air source heat pump system; the method is characterized in that: the control system comprises a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve, a controller, a first temperature sensor, a second temperature sensor, a flowmeter, a water temperature measuring circuit, a water level measuring circuit, an air temperature sensor and a solar irradiator;
the first electromagnetic valve is arranged on the water inlet pipe and used for controlling whether water enters or not;
the second electromagnetic valve is arranged on the water outlet pipe of the solar heat collector and used for controlling whether the water outlet pipe of the heat collector delivers water to the heat preservation and storage water tank or not;
the third electromagnetic valve is arranged on the water outlet pipe of the air source heat pump system and used for controlling whether the water outlet pipe of the air source heat pump system delivers water to the heat preservation and storage water tank or not;
the first temperature sensor is arranged at the joint of the solar heat collector water inlet pipe and the solar heat collector and is used for collecting the temperature of the inlet water of the solar heat collector;
the second temperature sensor is arranged at the joint of the water outlet pipe of the solar thermal collector and is used for collecting the temperature of the outlet water of the solar thermal collector;
the flow meter is arranged on the water inlet pipe of the solar heat collector and is used for collecting the flow entering the solar heat collector;
the water temperature measuring circuit is used for measuring the water temperature condition in the heat preservation and storage water tank;
the water level measuring circuit is used for measuring the water level condition in the heat-preservation and heat-storage water tank;
the air temperature sensor is fixedly arranged on the engineering hot water system of the solar heat pump and is used for collecting the temperature of the outside air;
the solar radiation instrument is fixedly arranged on the solar heat collector and is used for collecting the total radiation of solar energy;
the controller is used for acquiring data of the first temperature sensor, the second temperature sensor, the flowmeter, the water temperature measuring circuit, the water level measuring circuit, the air temperature sensor and the solar irradiator and controlling the opening and closing of the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve and the relay;
the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve, the first temperature sensor, the second temperature sensor, the flowmeter, the water temperature measuring circuit, the water level measuring circuit, the air temperature sensor and the solar irradiation instrument are respectively connected with the controller. The controller employs an STM32 processor. The control system of the solar heat pump engineering hot water system further comprises a display module, wherein the display module is connected with the controller and adopts an LCD touch screen display. In this embodiment, the air temperature sensor is fixed on the heat preservation and storage water tank and is fixed by a support.
As shown in fig. 2, in this embodiment, the water level measuring circuit adopts 9 steel pins, the 9 steel pins are respectively disposed at different heights inside the thermal insulation and heat storage water tank, and each steel pin is connected in series with a resistor and is respectively connected with a 5V power supply; each steel needle is respectively connected with an electronic switch, the electronic switch is connected with a controller, a bias voltage is supplied to a resistor by a 5V power supply, when a certain steel needle is not in contact with the water surface, the output of the steel needle is high level, when the steel needle is in contact with the water surface, the output of the steel needle is low level, the output of the steel needle is connected to an electronic switch CD4069, and the steel needle is reversely connected to an input pin of an STM32 processor after being driven by 74LS 244. After the STM32 processor judges the pins, corresponding water level values can be obtained and are transmitted to the LCD touch screen display to display corresponding water levels. The display is divided into 9 steps, and each step is 1/9 of full water level. The method is simple and easy to realize, saves the traditional A/D converter, has low cost, and can measure the water level in the heat-preservation and heat-storage water tank.
The water temperature measuring circuit comprises a thermistor and an operational amplifier; the thermistor is connected with the operational amplifier, and the operational amplifier is connected with the controller. The thermistor adopts an NTC negative temperature coefficient thermal resistor, as shown in figure 3. The principle of the water temperature measuring circuit is that a resistance signal changing along with the temperature is converted into a changing voltage signal by utilizing the characteristic that the resistance value of the thermistor changes along with the temperature, and then the voltage signal is amplified into a 0-3.3V voltage signal by an operational amplifier. Because the STM32 processor is provided with an AD conversion port, voltage signals can be directly connected to the AD input port of the processor and converted into digital signals, and the circuit has accurate measurement. The operational amplifier adopts an LM324 operational amplifier.
The first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve and the relay are all relays of traditional models.
The flowmeter adopts an LWGY-RS485-DN40 turbine flowmeter and is provided with an RS485 output.
The solar energy irradiator adopts a TBQ-2 type total radiation meter, adopts a photoelectric conversion induction principle and is combined with a DL-2 type standard current transducer.
The first temperature sensor and the second temperature sensor adopt AC-PD-1 digital temperature sensors, so that the precision is high and the stability is good; the sensor and the transmitter are integrated, so that the sensor is convenient to install, high in precision and low in power consumption; and RS485 output is provided.
The air temperature sensor adopts an AC-PD-3 wall-mounted digital temperature and humidity sensor/transmitter, and integrates sensing and transmission.
The utility model provides a pair of solar thermal energy pump engineering hot water system's control system still includes MAX485 converting circuit, and flowmeter, first temperature sensor, second temperature sensor are respectively through MAX485 converting circuit with the data transmission of gathering to STM32 treater in.
The utility model discloses a theory of operation does: the controller is used for collecting data of the first temperature sensor, the second temperature sensor, the flowmeter, the water temperature measuring circuit, the water level measuring circuit, the air temperature sensor and the solar irradiator and controlling the opening and closing of the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve and the relay. The water temperature collected by the first temperature sensor at the water inlet pipe of the solar thermal collector is T1, the water temperature collected by the second temperature sensor at the water outlet pipe of the solar thermal collector is T2, and the heat collection capacity of the solar thermal collector is calculated by the following formula:
wherein the content of the first and second substances,
the unit is t/h for the mass flow of cold water entering the solar heat collector; is composed of
The specific constant pressure heat capacity of the heat transfer working medium corresponding to the average temperature of the working medium is expressed by J/(kg DEG C),
is the sampling time interval in units of s. And in combination with the external temperature, when the heat collected by the solar heat collector is not enough to heat the water in the heat-insulation and heat-storage water tank to the preset temperature, the controller controls the third electromagnetic valve to be opened and the relay to be closed, and the air source heat pump system is started to perform auxiliary heating. Or when the water temperature at the water outlet pipe of the solar heat collector does not reach the preset temperature, the controller controls the second electromagnetic valve to be closed, controls the third electromagnetic valve to be opened and the relay to be closed, and starts the air source heat pump system to perform auxiliary heating.
When the water level in the heat-preservation and heat-storage water tank is lower than the preset water level, the controller controls the first electromagnetic valve on the water inlet pipe to be opened, and water is added into the heat-preservation and heat-storage water tank.
The present invention is not limited to the above-described embodiments, but only to the preferred embodiments of the present invention, and the present invention is not limited thereto, and any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (4)
1. A control system of a solar heat pump engineering hot water system comprises a water inlet pipe, a heat preservation and storage water tank, a solar circulating pump, a solar heat collector, an air source heat pump system, a heat pump circulating pump, a solar heat collector water inlet pipe, a solar heat collector water outlet pipe, an air source heat pump system water inlet pipe, an air source heat pump system water outlet pipe and a user water outlet pipe; tap water enters the heat-preservation and heat-storage water tank through the water inlet pipe, is conveyed to the solar thermal collector through the solar circulating pump and the solar thermal collector water inlet pipe for heating, and is conveyed to the heat-preservation and heat-storage water tank through the solar thermal collector water outlet pipe; when the heat of the solar heat collector cannot heat the water in the heat-insulation and heat-storage water tank to a preset temperature, running water in the heat-insulation and heat-storage water tank enters the air source heat pump system through the water inlet pipe of the air source heat pump system to be heated, and then is conveyed to the heat-insulation and heat-storage water tank through the water outlet pipe of the air source heat pump system; the method is characterized in that: the control system comprises a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve, a controller, a first temperature sensor, a second temperature sensor, a flowmeter, a water temperature measuring circuit, a water level measuring circuit, an air temperature sensor, a solar irradiator and a relay;
the first electromagnetic valve is arranged on the water inlet pipe and used for controlling whether water enters or not;
the second electromagnetic valve is arranged on the water outlet pipe of the solar heat collector and is used for controlling whether the water outlet pipe of the heat collector delivers water to the heat preservation and storage water tank or not;
the third electromagnetic valve is arranged on the water outlet pipe of the air source heat pump system and used for controlling whether the water outlet pipe of the air source heat pump system delivers water to the heat preservation and storage water tank or not;
the first temperature sensor is arranged at the joint of the solar heat collector water inlet pipe and the solar heat collector and is used for collecting the temperature of the inlet water of the solar heat collector;
the second temperature sensor is arranged at the joint of the water outlet pipe of the solar thermal collector and is used for collecting the temperature of the outlet water of the solar thermal collector;
the flow meter is arranged on the water inlet pipe of the solar heat collector and is used for collecting the flow entering the solar heat collector;
the water temperature measuring circuit is used for measuring the water temperature condition in the heat preservation and storage water tank;
the water level measuring circuit is used for measuring the water level condition in the heat-preservation and heat-storage water tank;
the air temperature sensor is fixedly arranged on the engineering hot water system of the solar heat pump and is used for collecting the temperature of the outside air;
the solar radiation instrument is fixedly arranged on the solar heat collector and is used for collecting the total solar radiation;
the relay is arranged on a connecting circuit of the air source heat pump system and the power supply and is used for controlling the starting and stopping of the air source heat pump system;
the controller is used for acquiring data of the first temperature sensor, the second temperature sensor, the flowmeter, the water temperature measuring circuit, the water level measuring circuit, the air temperature sensor and the solar irradiator and controlling the opening and closing of the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve and the relay;
the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve, the first temperature sensor, the second temperature sensor, the flowmeter, the water temperature measuring circuit, the water level measuring circuit, the air temperature sensor, the solar irradiator and the relay are respectively connected with the controller.
2. The control system of a solar heat pump engineering hot water system according to claim 1, characterized in that: the water level measuring circuit adopts a plurality of steel needles which are respectively arranged at different heights in the heat preservation and storage water tank, and each steel needle is connected with a resistor in series and is respectively connected with a power supply; each steel needle is respectively connected with an electronic switch, and the electronic switch is connected with a controller.
3. The control system of a solar heat pump engineering hot water system according to claim 1, characterized in that: the water temperature measuring circuit comprises a thermistor and an operational amplifier; the thermistor is connected with the operational amplifier, and the operational amplifier is connected with the controller.
4. The control system of a solar heat pump engineering hot water system according to claim 1, characterized in that: the controller employs an STM32 processor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920610689.8U CN210242036U (en) | 2019-04-30 | 2019-04-30 | Control system of solar heat pump engineering hot water system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920610689.8U CN210242036U (en) | 2019-04-30 | 2019-04-30 | Control system of solar heat pump engineering hot water system |
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| CN210242036U true CN210242036U (en) | 2020-04-03 |
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| CN201920610689.8U Active CN210242036U (en) | 2019-04-30 | 2019-04-30 | Control system of solar heat pump engineering hot water system |
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Assignee: GUANGXI JISHUN ENERGY TECHNOLOGY Co.,Ltd. Assignor: GUANGXI SHENGWEI ENERGY TECHNOLOGY Co.,Ltd. Contract record no.: X2022450000005 Denomination of utility model: A control system of solar energy heat pump engineering hot water system Granted publication date: 20200403 License type: Common License Record date: 20220708 |