Light sensation control intelligent photovoltaic heat pump

Abstract

The utility model discloses a light sensation control intelligent photovoltaic heat pump, which belongs to the technical field of heat exchange equipment and comprises a light sensation controller, a photovoltaic electromagnetic valve, a compressor, an evaporator, a solar photovoltaic heat exchange coil and a condenser. The high-pressure steam output end of the compressor communicates with the input end of a steam liquefaction section of the condenser, the output end of the steam liquefaction section communicates with the input end of the photovoltaic electromagnetic valve, the output end of the photovoltaic electromagnetic valve communicates with the input end of the photovoltaic heat exchange coil pipe, and the output end of the photovoltaic heat exchange coil pipe communicates with the input end of the evaporator. The output end of the steam liquefaction section further communicates with the input end of the evaporator, and the output end of the evaporator communicates with the input end of the compressor. The photovoltaic electromagnetic valve is electrically connected with the mains supply through a normally-closed contact of the relay KA2, and a coil of the relay KA2 is electrically connected with the mains supply through the light sensation controller. The light sensation control intelligent photovoltaic heat pump solves the problem that the power consumption of equipment is increased when an existing photovoltaic heat pump is used at night.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchange equipment, in particular to a light-sensing controlled intelligent photovoltaic heat pump. Background Art

[0002] The air source heat pump system is a highly efficient heating device that uses the reverse Carnot cycle principle to absorb heat from the air, and has the advantages of energy saving and environmental protection. By connecting several solar photovoltaic heat exchange coils in parallel in the air source heat pump system to absorb heat from the sun, the heating capacity of the air source heat pump can be increased by 10%-30%, which can greatly improve the energy efficiency advantage of the air source heat pump.

[0003] However, photovoltaic heat pumps also face some problems in daily use. Since the solar photovoltaic heat exchange coil itself is also a heat exchanger, for the refrigeration system, increasing the volume of the heat exchanger also requires increasing the circulation of the refrigerant. However, at night or on rainy days when there is a lack of light resources, the solar photovoltaic heat exchange coil absorbs less heat, and the increase in the circulation of the system's refrigerant will lead to an increase in power consumption. Therefore, the photovoltaic heat pump will increase the power consumption of the equipment when used at night. Utility Model Content

[0004] In order to overcome the defects of the prior art, the utility model provides a light-sensing controlled intelligent photovoltaic heat pump to solve the above-mentioned problems.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a light-sensing controlled intelligent photovoltaic heat pump, including a light-sensing controller, a photovoltaic solenoid valve, a compressor, an evaporator, a solar photovoltaic heat exchange coil and a condenser;

[0006] The high-pressure steam output end of the compressor is connected to the input end of the steam liquefaction section of the condenser, the output end of the steam liquefaction section is connected to the input end of the photovoltaic solenoid valve, the output end of the photovoltaic solenoid valve is connected to the input end of the photovoltaic heat exchange coil, and the output end of the photovoltaic heat exchange coil is connected to the input end of the evaporator;

[0007] The output end of the steam liquefaction section is also connected to the input end of the evaporator, and the output end of the evaporator is connected to the input end of the compressor;

[0008] The photovoltaic solenoid valve is electrically connected to the mains via the normally closed contact of the relay KA2, and the coil of the relay KA2 is electrically connected to the mains via the photosensitive controller.

[0009] It is worth noting that the condenser includes a water pipe section, and the steam liquefaction section is in contact with the water pipe section so that the high-pressure steam in the steam liquefaction section heats the water flowing through the water pipe section.

[0010] Optionally, the photosensitive controller is provided with a first port, a second port, a third port, a fourth port and a photosensitive switch, the first port is electrically connected to the live wire of the AC power, the first port is electrically connected to the third port, the third port is electrically connected to the fourth port through the coil of the relay KA2, the fourth port is electrically connected to the second port through the photosensitive switch, and the second port is electrically connected to the neutral wire of the AC power.

[0011] Preferably, a four-way valve is further included, wherein the high-pressure steam output end of the compressor is connected to port D of the four-way valve, port C of the four-way valve is connected to the input end of the steam liquefaction section of the condenser, port E of the four-way valve is connected to the output end of the evaporator, and port S of the four-way valve is connected to the input end of the compressor.

[0012] Specifically, the first power port of the four-way valve is electrically connected to the live line of the mains, and the second power port of the four-way valve is electrically connected to the neutral line of the mains through the coil of the relay KA1;

[0013] The photovoltaic solenoid valve is electrically connected to the mains through the normally closed contact of relay KA1 and the normally closed contact of relay KA2 in sequence.

[0014] It is worth noting that the power port of the compressor is electrically connected to the live wire of the AC power through a control relay, wherein the first end of the control relay is electrically connected to the live wire of the AC power, and the second end of the control relay is electrically connected to the power port of the compressor; the second end of the control relay is also electrically connected to the input end of the photovoltaic solenoid valve through the normally closed contact of the relay KA1 and the normally closed contact of the relay KA2 in sequence, and the output end of the photovoltaic solenoid valve is electrically connected to the neutral wire of the AC power; the second end of the control relay is also electrically connected to the second port of the light sensor controller.

[0015] Preferably, it further comprises a liquid storage tank and an economizer, and the output end of the steam liquefaction section is connected to the input end of the photovoltaic solenoid valve and the input end of the evaporator respectively after passing through the liquid storage tank and the economizer in sequence.

[0016] The beneficial effect of the utility model is that: in the light-sensing controlled intelligent photovoltaic heat pump, light-sensing control is added by setting a light-sensing controller, and the light-sensing principle is used to control the relay KA2 to control the opening and closing of the photovoltaic solenoid valve, so that when the light is sufficient during the day, the light-sensing element in the light-sensing controller is disconnected, the coil of the relay KA2 is powered off, the normally closed contact of the relay KA2 is attracted, and the photovoltaic solenoid valve is powered on, so that the circuit of the solar photovoltaic heat exchange coil can be opened, and a part of the refrigerant output from the output end of the steam liquefaction section can be heated by the solar photovoltaic heat exchange coil first, and then transported to the evaporator for further heating, and when the evaporator is heated, the specified temperature can be reached more quickly, thereby improving energy efficiency. When there is a lack of light, such as at night, the light-sensing element in the light-sensing controller is turned on, and the photovoltaic solenoid valve is powered off to close the circuit of the solar photovoltaic heat exchange coil. At this time, only the evaporator is used for heating, and the circuit of the solar photovoltaic heat exchange coil with low working efficiency is cut off, which can reduce the circulation amount of the refrigerant and thus reduce power consumption. In this way, the advantages of solar photovoltaic heat exchange coils can be fully utilized when there is sufficient sunlight, and energy conservation can also be taken into account when there is a lack of sunlight, thereby improving the overall energy efficiency of photovoltaic heat pumps. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of a light-sensing controlled intelligent photovoltaic heat pump refrigeration system in one embodiment of the utility model;

[0018] Figure 2 This is a schematic diagram of an electrical system for light-sensing control of a photovoltaic heat pump in an embodiment of the present utility model. DETAILED DESCRIPTION

[0019] The specific implementation methods of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these implementation methods is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in each implementation method of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0020] like Figure 1 and 2 As shown, a light-sensing controlled intelligent photovoltaic heat pump includes a light-sensing controller, a photovoltaic solenoid valve, a compressor, an evaporator, a solar photovoltaic heat exchange coil and a condenser;

[0021] The high-pressure steam output end of the compressor is connected to the input end of the steam liquefaction section of the condenser, the output end of the steam liquefaction section is connected to the input end of the photovoltaic solenoid valve, the output end of the photovoltaic solenoid valve is connected to the input end of the photovoltaic heat exchange coil, and the output end of the photovoltaic heat exchange coil is connected to the input end of the evaporator;

[0022] The output end of the steam liquefaction section is also connected to the input end of the evaporator, and the output end of the evaporator is connected to the input end of the compressor;

[0023] The photovoltaic solenoid valve is electrically connected to the mains via the normally closed contact of the relay KA2, and the coil of the relay KA2 is electrically connected to the mains via the photosensitive controller.

[0024] In the light-sensing controlled intelligent photovoltaic heat pump, light-sensing control is added by setting a light-sensing controller, and the light-sensing principle is used to control the relay KA2 to control the opening and closing of the photovoltaic solenoid valve, so that when the light is sufficient during the day, the light-sensing element in the light-sensing controller is disconnected, the coil of the relay KA2 is powered off, the normally closed contact of the relay KA2 is attracted, and the photovoltaic solenoid valve is powered on, so that the circuit of the solar photovoltaic heat exchange coil can be opened, and a part of the refrigerant output from the output end of the steam liquefaction section can be heated by the solar photovoltaic heat exchange coil first, and then transported to the evaporator for further heating. When the evaporator is heated, it can reach the specified temperature more quickly, thereby improving energy efficiency. In addition, the light-sensing element adopts an adjustable controller, and different light-sensing intensities can be adjusted according to environmental requirements. When there is a lack of light, such as at night, the light-sensing element in the light-sensing controller is turned on, and the photovoltaic solenoid valve is powered off to close the circuit of the solar photovoltaic heat exchange coil. At this time, only the evaporator is used for heating, and the circuit of the solar photovoltaic heat exchange coil with low working efficiency is cut off, which can reduce the circulation amount of the refrigerant and thus reduce power consumption. In this way, the advantages of solar photovoltaic heat exchange coils can be fully utilized when there is sufficient sunlight, and energy conservation can also be taken into account when there is a lack of sunlight, thereby improving the overall energy efficiency of photovoltaic heat pumps.

[0025] The role of the solar photovoltaic heat exchange coil is equivalent to another evaporator. Compared with the finned evaporator commonly used in heat pumps (the main materials are copper and aluminum foil), the cost of the solar photovoltaic heat exchange coil (the main material is aluminum plate) is much lower, and the installation is not limited by the equipment space. The number of solar photovoltaic heat exchange coils can be flexibly adjusted according to demand, which is equivalent to greatly increasing the heat exchange area of ​​the evaporator at a lower cost, thereby increasing the heating capacity of the heat pump.

[0026] It is worth noting that the condenser includes a water pipe section, and the steam liquefaction section is in contact with the water pipe section so that the high-pressure steam in the steam liquefaction section heats the water flowing through the water pipe section. In the existing structure, the steam liquefaction section in the condenser is filled with refrigerant, and the steam liquefaction section is arranged to spiral around the water pipe section. The water pipe section is used to inject water that needs to be heated.

[0027] Preferably, the photosensitive controller is provided with a first port, a second port, a third port, a fourth port and a photosensitive switch, the first port is electrically connected to the live wire of the mains, the first port is electrically connected to the third port, the third port is electrically connected to the fourth port through the coil of the relay KA2, the fourth port is electrically connected to the second port through the photosensitive switch, and the second port is electrically connected to the neutral wire of the mains. Figure 2 As shown, when there is sufficient light, the photosensitive switch is disconnected, at which time the circuit composed of the first port, the second port, the third port, the fourth port and the photosensitive switch is disconnected, the coil of the relay KA2 loses power, and the normally closed contact of the relay KA2 is closed; when there is a lack of light, the circuit composed of the first port, the second port, the third port, the fourth port and the photosensitive switch is turned on, the coil of the relay KA2 is energized, and the normally closed contact of the relay KA2 is disconnected.

[0028] Optionally, a four-way valve is further included, wherein the high-pressure steam output end of the compressor is connected to port D of the four-way valve, port C of the four-way valve is connected to the input end of the steam liquefaction section of the condenser, port E of the four-way valve is connected to the output end of the evaporator, and port S of the four-way valve is connected to the input end of the compressor. The four-way valve is an existing structure, and in the heating mode, port E is connected to port S, and the output end of the evaporator can transport refrigerant to the input end of the compressor, and port D is connected to port C, and the high-pressure steam output end of the compressor can transport refrigerant to the input end of the steam liquefaction section of the condenser.

[0029] Specifically, the first power port of the four-way valve is electrically connected to the live wire of the AC power, and the second power port of the four-way valve is electrically connected to the neutral wire of the AC power through the coil of relay KA1; the photovoltaic solenoid valve is electrically connected to the AC power through the normally closed contacts of relay KA1 and the normally closed contacts of relay KA2 in turn.

[0030] The four-way valve can change the connection mode of the port after being powered on. The photovoltaic solenoid valve adopts two-level control, in which the first-level control is mode control. Since the function of the solar photovoltaic heat exchange coil is to enhance the heat absorption capacity in the heating mode, the solar photovoltaic heat exchange coil is not needed in the cooling mode. In the conventional heat pump control system, the four-way valve is powered on in the cooling mode. Therefore, the coil of the relay KA1 is controlled by the output point of the four-way valve on the heat pump control mainboard, and the photovoltaic solenoid valve is connected to the normally closed contact of the KA1 relay. When the heat pump is in the cooling mode, the four-way valve is powered on, the coil of the relay KA1 is powered on, the normally closed contact of the relay KA1 is disconnected, the photovoltaic solenoid valve is powered off and closed, the flow path of the solar photovoltaic heat exchange coil in the refrigeration system is cut off, and the solar photovoltaic heat exchange coil stops being used. The secondary control is light-sensing control. The working mechanism of the light-sensing controller is that the light-sensing switch is disconnected when there is sufficient light, and closed when there is no light. The coil of relay KA2 is connected to the light-sensing switch of the light-sensing controller, and the normally closed contact of relay KA2 is connected in series to the power supply circuit of the photovoltaic solenoid valve. When there is sufficient light, the coil of relay KA2 loses power, the normally closed contact remains in a closed state, the power supply circuit of the photovoltaic solenoid valve is connected normally, the photovoltaic solenoid valve opens, and the solar photovoltaic heat exchange coil starts to work and exchange heat. When there is no light, the coil of relay KA2 is energized, the normally closed contact is disconnected, the photovoltaic solenoid valve is de-energized, the flow path of the solar photovoltaic heat exchange coil is cut off, and the heat exchange work stops.

[0031] It is worth noting that the power port of the compressor is electrically connected to the live wire of the mains through a control relay, wherein the first end of the control relay is electrically connected to the live wire of the mains, and the second end of the control relay is electrically connected to the power port of the compressor; the second end of the control relay is also electrically connected to the input end of the photovoltaic solenoid valve through the normally closed contact of the relay KA1 and the normally closed contact of the relay KA2 in sequence, and the output end of the photovoltaic solenoid valve is electrically connected to the neutral wire of the mains; the second end of the control relay is also electrically connected to the second port of the photosensitive controller, so that the second port can be electrically connected to the neutral wire of the mains through the normally closed contact of the relay KA1, the normally closed contact of the relay KA2 and the photovoltaic solenoid valve in sequence.

[0032] like Figure 2 As shown, a control relay is provided in the heat pump mainboard to drive the compressor to work. When the control relay is energized and attracted, the compressor starts to work. Since the photovoltaic solenoid valve and the light sensor controller only need to work when the compressor is started, they do not need to be powered on at other times. Therefore, compared with the method of directly connecting the input ends of these components to the live wire of the mains, this design can minimize the power-on time of the photovoltaic solenoid valve and the light sensor controller, ensuring that the photovoltaic solenoid valve and the light sensor controller are powered only when they are needed, thereby extending the service life of each component, the photovoltaic solenoid valve and the light sensor controller.

[0033] Preferably, it further comprises a liquid storage tank and an economizer, and the output end of the steam liquefaction section is connected to the input end of the photovoltaic solenoid valve and the input end of the evaporator respectively after passing through the liquid storage tank and the economizer in sequence.

[0034] When in use, the water to be heated is input from the water inlet of the water pipe section of the condenser, and will contact the high-pressure and high-temperature steam refrigerant of the steam liquefaction section, thereby absorbing energy to heat up, and hot water can be output from the water outlet of the water pipe section. After the high-pressure and high-temperature steam refrigerant of the steam liquefaction section absorbs energy, it will cool down and liquefy into liquid refrigerant, and enter the liquid storage tank for storage. When heating is required, it will be output from the liquid storage tank to the economizer (in order to improve the energy efficiency of the heat pump unit, the liquid refrigerant coming out of the condenser needs to be overcooled to improve the COP (coefficient of performance) of the unit); when there is sufficient sunlight, the refrigerant coming out of the economizer is divided into two paths after passing through the electronic expansion valve, and enters the evaporator and enters the evaporator after passing through the solar photovoltaic heat exchange coil to achieve heating; when there is a lack of sunlight, the refrigerant coming out of the economizer enters the evaporator to achieve heating; the refrigerant coming out of the evaporator enters the compressor to be compressed to form steam, and then enters the steam liquefaction section of the condenser.

[0035] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.

Claims

1. A light-sensing controlled intelligent photovoltaic heat pump, characterized in that: Including light sensor controller, photovoltaic solenoid valve, compressor, evaporator, solar photovoltaic heat exchange coil and condenser; The high-pressure steam output end of the compressor is connected to the input end of the steam liquefaction section of the condenser, the output end of the steam liquefaction section is connected to the input end of the photovoltaic solenoid valve, the output end of the photovoltaic solenoid valve is connected to the input end of the photovoltaic heat exchange coil, and the output end of the photovoltaic heat exchange coil is connected to the input end of the evaporator; The output end of the steam liquefaction section is also connected to the input end of the evaporator, and the output end of the evaporator is connected to the input end of the compressor; The photovoltaic solenoid valve is electrically connected to the mains via the normally closed contact of the relay KA2, and the coil of the relay KA2 is electrically connected to the mains via the photosensitive controller.

2. A light-sensing controlled intelligent photovoltaic heat pump according to claim 1, characterized in that: The condenser comprises a water pipe section, and the steam liquefaction section contacts the water pipe section so that the high-pressure steam in the steam liquefaction section heats the water flowing through the water pipe section.

3. The light-sensing controlled intelligent photovoltaic heat pump according to claim 1, characterized in that: The photosensitive controller is provided with a first port, a second port, a third port, a fourth port and a photosensitive switch, the first port is electrically connected to the live wire of the AC power, the first port is electrically connected to the third port, the third port is electrically connected to the fourth port through the coil of the relay KA2, the fourth port is electrically connected to the second port through the photosensitive switch, and the second port is electrically connected to the neutral wire of the AC power.

4. A light-sensing controlled intelligent photovoltaic heat pump according to claim 3, characterized in that: It also includes a four-way valve, wherein the high-pressure steam output end of the compressor is connected to the port D of the four-way valve, the port C of the four-way valve is connected to the input end of the steam liquefaction section of the condenser, the port E of the four-way valve is connected to the output end of the evaporator, and the port S of the four-way valve is connected to the input end of the compressor.

5. A light-sensing controlled intelligent photovoltaic heat pump according to claim 4, characterized in that: The first power port of the four-way valve is electrically connected to the live line of the mains, and the second power port of the four-way valve is electrically connected to the neutral line of the mains through the coil of the relay KA1; The photovoltaic solenoid valve is electrically connected to the mains via the normally closed contact of relay KA1 and the normally closed contact of relay KA2 in sequence.

6. The light-sensing controlled intelligent photovoltaic heat pump according to claim 4, characterized in that: The power port of the compressor is electrically connected to the live wire of the mains through a control relay, wherein the first end of the control relay is electrically connected to the live wire of the mains, and the second end of the control relay is electrically connected to the power port of the compressor; the second end of the control relay is also electrically connected to the input end of the photovoltaic solenoid valve through the normally closed contact of the relay KA1 and the normally closed contact of the relay KA2 in sequence, and the output end of the photovoltaic solenoid valve is electrically connected to the neutral wire of the mains; the second end of the control relay is also electrically connected to the second port of the light sensor controller.

7. The light-sensing controlled intelligent photovoltaic heat pump according to claim 1, characterized in that: It also includes a liquid storage tank and an economizer. The output end of the steam liquefaction section is connected to the input end of the photovoltaic solenoid valve and the input end of the evaporator respectively after passing through the liquid storage tank and the economizer in sequence.

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