Solar photovoltaic photo-thermal device based on combined air conditioning unit

Abstract

The utility model discloses a solar photovoltaic photo-thermal device based on a combined air conditioning unit. The system comprises a combined air conditioning unit, a cold water coil pipe, a hot water coil pipe and a domestic water pipeline, wherein the combined air conditioning unit is connected with the cold water coil pipe, the hot water coil pipe and the domestic water pipeline through pipelines; the cold water coil comprises a cold water inlet and a cold water outlet, the hot water coil comprises a hot water inlet and a hot water outlet, and the domestic water pipeline comprises a domestic water inlet and a domestic water outlet; a photovoltaic panel, a water coil pipe and an exhaust pipe are arranged at the top of the combined air conditioning unit, an electric air valve is arranged on the exhaust pipe, and an aluminum shell is arranged outside the combined air conditioning unit. According to the utility model, the problem of low transduction efficiency of the photovoltaic panel of the combined air conditioning unit in the prior art is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic air conditioning, in particular to a solar photovoltaic thermal device based on a combined air conditioning unit. Background Art

[0002] In recent years, the concept of energy conservation and emission reduction has gradually penetrated into all aspects of social life. As an important part of building energy consumption, the transformation of air conditioning energy consumption and its energy structure is an important step for building energy consumption to gradually achieve carbon neutrality. The combined air conditioning unit installed outdoors is a common air conditioner with a large surface area. Hot and cold water as the cold and hot media of the air conditioning unit are often obtained through chillers and boilers. The former often consumes a lot of electricity, while the latter emits more greenhouse gases.

[0003] Solar photovoltaic thermal technology is a common way to utilize solar energy. Photovoltaic panels generate heat during the day, but as the temperature of the photovoltaic panels increases, the power generation efficiency of the photovoltaic panels will decrease. At night, the larger surface area of ​​the photovoltaic panels can exchange heat with the low-temperature sky through long-wave radiation, and the cold energy generated can be used for other purposes. In addition, the surface of photovoltaic panels installed outdoors often accumulates a lot of dust, which will seriously affect the power generation efficiency of photovoltaic panels. When installed at high places, it is often difficult to clean the dust on the surface of photovoltaic panels.

[0004] In the related art, the problem of low energy conversion efficiency of photovoltaic panels of combined air-conditioning units has not been effectively solved. Utility Model Content

[0005] The utility model aims to provide a solar photovoltaic and thermal device based on a combined air-conditioning unit to solve the problem of low energy conversion efficiency of photovoltaic panels of combined air-conditioning units in related technologies.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A solar photovoltaic and thermal device based on a combined air-conditioning unit comprises a combined air-conditioning unit, a cold water coil, a hot water coil and a domestic water pipe, wherein the combined air-conditioning unit is connected to the cold water coil, the hot water coil and the domestic water pipe through pipes; the cold water coil comprises a cold water inlet and a cold water outlet, the hot water coil comprises a hot water inlet and a hot water outlet, and the domestic water pipe comprises a domestic water inlet and a domestic water outlet; a photovoltaic panel, a water coil and an exhaust duct are arranged on the top of the combined air-conditioning unit, an electric air valve is arranged on the exhaust duct, and an aluminum shell is arranged on the outside of the combined air-conditioning unit.

[0008] It is further configured as follows: the water coil is arranged in the aluminum shell, and the water coil is welded to the aluminum shell; the photovoltaic panel is arranged above the outside of the aluminum shell; and the gap between the aluminum shell and the water coil is filled with metal debris and thermal grease.

[0009] It is further configured that the hot water inlet, the hot water outlet, the cold water inlet and the cold water outlet are connected to the combined air conditioning unit.

[0010] It is further configured that the water coil includes a water pan inlet and a water pan outlet.

[0011] It is further configured as follows: the water pan inlet is connected to a water pan inlet pipe, and the water pan outlet is connected to a water pan outlet pipe.

[0012] It is further configured as follows: the hot water outlet and the cold water outlet are connected to the water pan inlet pipe through an electric three-way valve; the hot water inlet and the cold water inlet are connected to the water pan outlet pipe through an electric three-way valve.

[0013] It is further configured as follows: the domestic water inlet is connected to the water pan outlet pipe through an electric three-way valve; the domestic water outlet is connected to the water pan inlet pipe through an electric three-way valve.

[0014] It is further configured as follows: a pipeline water pump is arranged on the water tray outlet pipeline.

[0015] It is further configured that: a temperature sensor is provided in each of the water pan inlet pipe and the water pan outlet pipe.

[0016] It is further configured as follows: the combined air conditioning unit is connected to a battery.

[0017] Compared with the prior art, the beneficial technical effects of the utility model are:

[0018] 1. The hot and cold water produced by the water coils come from the heat exchange between solar energy and long-wave radiation, and the electricity generated by the photovoltaic panels can be used for the operation of the combined air-conditioning unit or other purposes. The entire operation process is clean and pollution-free. The water coils are evenly arranged in the aluminum shell, the water coils are connected to the aluminum shell by welding, and thermal grease and metal iron filings are filled between the aluminum shell and the water coils to improve the thermal conductivity of the device and make the overall operation of the device efficient.

[0019] 2. The exhaust pipe of the combined air conditioning unit can be used to clean or prevent dust from accumulating on the surface of the photovoltaic panel, reducing the workload of photovoltaic panel equipment maintenance and improving the power generation efficiency of the photovoltaic panel. The hot water of the water coil is used by the combined air conditioning unit or used for domestic heat. The water temperature in the water coil is reduced, and the heat generated by the photovoltaic panel can be continuously circulated to reduce the surface temperature of the photovoltaic panel and improve the power generation efficiency of the photovoltaic panel. When the unit is in cooling condition, the lower exhaust temperature reduces the surface temperature of the photovoltaic panel. Increase the heating efficiency of the photovoltaic panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a schematic diagram of the overall structure of a solar photovoltaic and thermal device based on a combined air-conditioning unit;

[0022] Figure 2 It is an axonometric diagram of a solar photovoltaic and thermal device based on a combined air conditioning unit;

[0023] Figure 3 A top view of the water coil.

[0024] Figure numerals: 1. Photovoltaic panel; 2. Aluminum shell; 3. Water coil; 4. Electric air valve; 5. Combined air-conditioning unit; 6. Exhaust duct; 7. Battery; 8. Temperature sensor; 9. Pipeline water pump; 10. Electric three-way valve. DETAILED DESCRIPTION

[0025] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] Example

[0029] Reference Figure 1-Figure 3 , is a solar photovoltaic and thermal device based on a combined air-conditioning unit disclosed in the utility model, the utility model includes: a combined air-conditioning unit 5, a cold water coil, a hot water coil and a domestic water pipe, the combined air-conditioning unit 5 is connected with the cold water coil, the hot water coil and the domestic water pipe through pipes; the cold water coil includes a cold water inlet and a cold water outlet, the hot water coil includes a hot water inlet and a hot water outlet, and the domestic water pipe includes a domestic water inlet and a domestic water outlet.

[0030] The utility model applies photovoltaic thermal technology to a combined air conditioning unit 5 installed outdoors. The solar photovoltaic thermal device based on the combined air conditioning unit 5 is mainly composed of a photovoltaic panel 1, an aluminum housing 2, a water coil 3, a battery 7, a temperature sensor 8, a pipeline water pump 9, and an electric three-way valve 10. The photovoltaic panel 1 is arranged above the aluminum housing 2. The water coil 3 is composed of a copper tube with an outer diameter of 12 mm and a wall thickness of 1 mm. The water coil 3 is evenly arranged in a serpentine shape in the aluminum housing 2, and the center distance of the coil is 50 mm to ensure uniform heat transfer between the aluminum housing 2 and the water coil 3. The aluminum housing 2 and the water coil 3 are connected by welding.

[0031] A photovoltaic panel 1 , a water coil 3 and an exhaust duct 6 are arranged on the top of the combined air-conditioning unit 5 , an electric air valve 4 is arranged on the exhaust duct 6 , and an aluminum casing 2 is arranged on the outside of the combined air-conditioning unit 5 .

[0032] When the photovoltaic panel 1 is used for a long time, dust will accumulate on its surface, which will reduce the power generation efficiency of the photovoltaic panel 1. In particular, the photovoltaic panel 1 installed at a high place such as a roof is often difficult to clean and the cleaning cost is high. The utility model installs an electric air valve 4 on the side of the exhaust pipe 6 of the combined air conditioning unit 5. When the combined air conditioning unit 5 is running, the electric air valve 4 on the side of the exhaust pipe 6 is opened, and the exhaust of the combined air conditioning unit 5 can clean or prevent dust from accumulating on the surface of the photovoltaic panel 1, thereby improving the power generation efficiency of the photovoltaic panel 1 and reducing the workload of daily maintenance of the photovoltaic panel 1. In addition, when the unit is in a refrigeration condition, the cold air discharged from the exhaust pipe 6 can reduce the surface temperature of the photovoltaic panel 1 more quickly, further improving the power generation efficiency of the photovoltaic panel 1.

[0033] By placing the water coil 3 under the photovoltaic panel 1, the heat generated by the photovoltaic panel 1 can be quickly extracted, thereby improving the power generation efficiency of the photovoltaic panel 1. At the same time, the heat generated by the photovoltaic panel 1 can also be used for other purposes through the water coil 3. During the day, the electric energy generated by the photovoltaic panel 1 can be stored in the battery 7, which is used to power the combined air-conditioning unit 5 or as part of the electricity for daily use. The heat generated by the photovoltaic panel 1 is collected by the water coil 3 for heating the combined air-conditioning unit 5. In addition, at night, the photovoltaic panel 1 can also exchange heat with the low-temperature sky through long-wave radiation, and the cold energy generated by the photovoltaic panel 1 can also be used for refrigeration of the unit. The exhaust of the combined air-conditioning unit 5 can prevent or clean the dust on the surface of the photovoltaic panel 1, thereby improving the power generation efficiency of the photovoltaic panel 1.

[0034] In an optional embodiment: the water coil 3 is disposed in the aluminum shell 2, and the water coil 3 is welded to the aluminum shell 2; the photovoltaic panel 1 is arranged above the outside of the aluminum shell 2; and the gap between the aluminum shell 2 and the water coil 3 is filled with metal debris and thermal grease.

[0035] Specifically, in order to further improve the heat exchange efficiency between the aluminum shell 2 and the water coil 3 and reduce the contact thermal resistance, a mixture of thermal grease and metal chips is filled between the aluminum shell 2 and the water coil 3. The thermal grease can fill the gap between the aluminum shell 2 and the water coil 3, and the addition of metal chips can improve the heat transfer performance of the thermal grease.

[0036] In an optional embodiment: the hot water inlet, the hot water outlet, the cold water inlet and the cold water outlet are connected to the combined air conditioning unit 5. The water coil 3 includes a water pan inlet and a water pan outlet. The water pan inlet is connected to a water pan inlet pipe, and the water pan outlet is connected to a water pan outlet pipe. The hot water outlet and the cold water outlet are connected to the water pan inlet pipe through an electric three-way valve 10; the hot water inlet and the cold water inlet are connected to the water pan outlet pipe through an electric three-way valve 10. The combined air conditioning unit 5 is connected to a battery 7.

[0037] The photovoltaic thermal assembly is a part of the device. The photovoltaic thermal assembly consists of a photovoltaic panel 1, an aluminum housing 2 and a water coil 3. The photovoltaic thermal assembly is installed above the combined air conditioning unit 5. When the weather is good during the day and the solar irradiance is high, the electricity generated by the photovoltaic panel 1 is stored in the battery 7, which can be used as a power source for the combined air conditioning unit 5, the pipeline water pump 9, the electric valve and other equipment, or for domestic electricity. The photovoltaic panel 1 generates electricity accompanied by the generation of heat. The heat generated by the photovoltaic panel 1 is absorbed by the water coil 3. By controlling the electric three-way valve 10, the passage between the water coil 3 and the hot water coil is opened, and the passage between the water coil 3 and the cold water coil and the domestic water pipe is closed. The hot water in the water coil 3 can be used as part of the heat source of the combined air conditioning unit 5. Due to the fluctuation of solar irradiance during the day, it is difficult to ensure that the water temperature in the water coil 3 is always kept at a high temperature. Therefore, the water temperature in the water coil 3 is monitored by the temperature sensor 8. If the water temperature in the water coil 3 cannot meet the use requirements of the hot water coil, the electric three-way valve 10 is controlled to open the passage between the water coil 3 and the domestic water pipe, and close the passage between the water coil 3 and the cold and hot coils. The hot water in the water coil 3 is used to meet the demand for part of the domestic hot water. During the day, the heat generated by the photovoltaic panel 1 is used for heating or domestic heat of the combined air-conditioning unit 5. The temperature of the hot water after use is reduced and returned to the water coil 3. It is used again to cool the photovoltaic panel 1, thereby improving the power generation efficiency of the photovoltaic panel 1. Since there is an insulation layer on the outer shell of most combined air-conditioning units 5, the higher temperature of the photovoltaic panel 1 during the day will not affect the normal operation of the combined air-conditioning unit 5.

[0038] At night, the photovoltaic panel 1 can exchange heat with the low-temperature sky through long-wave radiation, and the water coil 3 can collect the cold energy generated by the photovoltaic panel 1. The water temperature in the water coil 3 is monitored by the temperature sensor 8. When the water temperature meets the basic requirements for refrigeration of the combined air-conditioning unit 5, the passage between the water coil 3 and the cold water coil is opened by controlling the electric three-way valve 10, and the passage between the water coil 3 and the domestic water pipe and the hot water coil is closed. The cold water in the water coil 3 can be used as part of the cold source of the combined air-conditioning unit 5. When the water temperature does not meet the basic requirements for refrigeration of the combined air-conditioning unit 5, the passage between the water coil 3 and the domestic water pipe is opened by controlling the electric three-way valve 10, and the passage between the water coil 3 and the cold and hot water coils is closed. At this time, the cold water in the cold water coil is used to meet part of the cold water demand for domestic use.

[0039] In an optional embodiment: the domestic water inlet is connected to the water pan outlet pipe; the domestic water outlet is connected to the water pan inlet pipe. A pipeline water pump 9 is arranged on the water pan outlet pipe. A temperature sensor 8 is arranged on each of the water pan inlet pipe and the water pan outlet pipe.

[0040] Specifically, temperature sensors 8 and electric three-way valves 10 are installed at the inlet and outlet of the water pan inlet pipe and the water pan outlet pipe, a pipeline water pump 9 is provided on the water pan outlet pipe, and the water coil 3 in direct contact with the air is wrapped with 40 mm thick rubber-plastic insulation material.

[0041] The working principle and beneficial effects of the utility model are as follows: the hot water and cold water generated by the water coil come from the heat exchange between solar energy and long-wave radiation, and the electric energy generated by the photovoltaic panel can be used for the operation of the combined air-conditioning unit or other purposes, and the entire operation process is clean and pollution-free. By evenly arranging the water coil in the aluminum shell, connecting the water coil and the aluminum shell by welding, and filling the aluminum shell and the water coil with thermal conductive silicone grease, metal iron filings, etc., the thermal conductivity of the device is improved, so that the overall operation of the device is efficient; the exhaust pipe of the combined air-conditioning unit can be used to clean or prevent dust from accumulating on the surface of the photovoltaic panel, reducing the workload of photovoltaic panel equipment maintenance and improving the power generation efficiency of the photovoltaic panel. The hot water of the water coil is used by the combined air-conditioning unit or used for domestic heat, and the water temperature in the water coil is reduced, which can continuously circulate and extract the heat generated by the photovoltaic panel, reduce the surface temperature of the photovoltaic panel, and improve the power generation efficiency of the photovoltaic panel. When the unit is in a cooling condition, the lower exhaust temperature reduces the surface temperature of the photovoltaic panel. Increase the heating efficiency of the photovoltaic panel.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A solar photovoltaic thermal device based on a combined air conditioning unit, characterized in that: include: A combined air conditioning unit (5), a cold water coil, a hot water coil and a domestic water pipe, wherein the combined air conditioning unit (5) is connected to the cold water coil, the hot water coil and the domestic water pipe via a pipe; The cold water coil comprises a cold water inlet and a cold water outlet, the hot water coil comprises a hot water inlet and a hot water outlet, and the domestic water pipeline comprises a domestic water inlet and a domestic water outlet; The top of the combined air conditioning unit (5) is provided with a photovoltaic panel (1), a water coil (3) and an exhaust pipe (6); the exhaust pipe (6) is provided with an electric air valve (4); and the outside of the combined air conditioning unit (5) is provided with an aluminum casing (2).

2. A solar photovoltaic thermal device based on a combined air conditioning unit according to claim 1, characterized in that: include: The water coil (3) is arranged in the aluminum shell (2), and the water coil (3) is welded to the aluminum shell (2); The photovoltaic panel (1) is arranged above the outside of the aluminum housing (2); The gap between the aluminum housing (2) and the water coil (3) is filled with metal scraps and thermally conductive silicone grease.

3. A solar photovoltaic thermal device based on a combined air conditioning unit according to claim 1, characterized in that: include: The hot water inlet, the hot water outlet, the cold water inlet and the cold water outlet are connected to the combined air conditioning unit (5).

4. A solar photovoltaic thermal device based on a combined air conditioning unit according to claim 1, characterized in that: include: The water coil (3) comprises a water tray inlet and a water tray outlet.

5. A solar photovoltaic thermal device based on a combined air conditioning unit according to claim 4, characterized in that: include: The water tray inlet is connected to a water tray inlet pipe, and the water tray outlet is connected to a water tray outlet pipe.

6. A solar photovoltaic thermal device based on a combined air conditioning unit according to claim 5, characterized in that: include: The hot water outlet and the cold water outlet are connected to the water pan inlet pipe via an electric three-way valve (10); The hot water inlet and the cold water inlet are connected to the water tray outlet pipe via an electric three-way valve (10).

7. A solar photovoltaic thermal device based on a combined air conditioning unit according to claim 5, characterized in that: include: The domestic water inlet is connected to the water tray outlet pipe via an electric three-way valve (10); The domestic water outlet is connected to the water tray inlet pipeline via an electric three-way valve (10).

8. A solar photovoltaic thermal device based on a combined air conditioning unit according to claim 5, characterized in that: include: A pipeline water pump (9) is arranged on the water tray outlet pipeline.

9. A solar photovoltaic thermal device based on a combined air conditioning unit according to claim 5, characterized in that: include: The water tray inlet pipe and the water tray outlet pipe are each provided with a temperature sensor (8).

10. A solar photovoltaic thermal device based on a combined air conditioning unit according to claim 1, characterized in that: include: The combined air conditioning unit (5) is connected to a battery (7).

Images