Unpowered photovoltaic curtain wall negative ion ventilation system

Abstract

The invention provides an unpowered photovoltaic curtain wall negative ion ventilation system. The unpowered photovoltaic curtain wall negative ion ventilation system comprises a building envelope structure, a photovoltaic curtain wall, an air negative ion release structure, flow guide equipment and a ceiling type air conditioning box. A ventilation channel is reserved between the photovoltaic curtain wall and the surface of the building envelope; the air negative ion release structure is located in the ventilation channel, when the photovoltaic curtain wall conducts photovoltaic conversion, the air negative ion release structure generates a chimney effect under the heat effect of a back plate of the air negative ion release structure and forms air negative ions with air in the ventilation channel, and the ventilation channel forms rising negative ion airflow under the chimney effect. The negative air ions are introduced into the ceiling type air conditioning box through the flow guide equipment, the treated airflow is output to the internal space of the building envelope after the negative air ion airflow is treated, the three functions of power generation, negative air ion generation and natural ventilation are integrated, and the energy consumption of the negative air ion ventilation system is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of air purification and healthy environment regulation, and in particular to a non-powered photovoltaic curtain wall negative ion ventilation system. Background Art

[0002] Current building negative ion application technology, mechanical ventilation systems, and photovoltaic curtain wall systems each face key bottlenecks: negative ions are difficult to transmit efficiently, mechanical ventilation consumes a lot of energy and is noisy, and photovoltaic curtain walls do not effectively utilize low-grade thermal energy. However, the three are naturally complementary in technology—the chimney effect of the photovoltaic curtain wall can drive natural ventilation, and combined with the tourmaline functional material integrated into the back panel, it releases negative ions under the action of temperature differences, achieving unpowered, efficient fresh air delivery and air purification. There is no system design in the relevant technology that uses this thermoelectric coupling mechanism for negative ion ventilation. Therefore, there is an urgent need to propose a self-powered negative ion ventilation system based on the thermoelectric synergistic effect of the photovoltaic curtain wall to break the technical barriers in the three major areas and promote the coordinated improvement of building energy conservation and indoor environmental quality. Summary of the Invention

[0003] The present invention provides a non-powered photovoltaic curtain wall negative ion ventilation system for promoting the coordinated improvement of building energy conservation and indoor environmental quality.

[0004] On the one hand, the present invention provides a non-powered photovoltaic curtain wall negative ion ventilation system, which includes a building enclosure structure, a photovoltaic curtain wall, an air negative ion release structure, a diversion device and a ceiling-mounted air conditioning box; The photovoltaic curtain wall is laid on the outside of at least one surface of the building envelope, and a ventilation channel is left between the at least one surface; the photovoltaic curtain wall is used to convert light energy into electrical energy; The negative air ion release structure is located in the ventilation channel, wherein the negative air ion release structure is used to generate a thermoelectric effect under the thermal effect of the back plate of the photovoltaic curtain wall, so that the air in the ventilation channel forms negative ions under the thermoelectric effect and forms an upward negative ion airflow under the chimney effect; The flow guide device is located on a side of the ventilation channel away from the ground, and is used to introduce negative ion airflow into the ceiling-mounted air conditioning box; The ceiling-mounted air-conditioning box is used to process the negative ion airflow according to the operation mode and output the processed airflow to the internal space of the building envelope structure.

[0005] According to the present invention, a non-powered photovoltaic curtain wall negative ion ventilation system further includes an air volume balancing valve and a control device; The air volume balancing valve is arranged on the air supply channel between the flow guide device and the ceiling-mounted air conditioning box, and the air volume balancing valve is connected to the control device; The control device is used to control the opening of the air volume balancing valve to adjust the air flow rate entering the ceiling-mounted air conditioning box.

[0006] According to the present invention, a non-powered photovoltaic curtain wall negative ion ventilation system further includes an air supply channel sensor, a return air temperature sensor and an indoor negative ion concentration sensor; The air supply channel sensor is used to collect the temperature of the air supply channel; The indoor temperature sensor is used to collect the return air temperature of the ceiling-mounted air conditioning box; The indoor negative ion concentration sensor is used to collect the internal negative ion concentration of the building envelope; The control device is also used to determine the temperature of the mixed air flow entering the ceiling-mounted air-conditioning box based on the temperature of the air supply duct and the return air temperature of the ceiling-mounted air-conditioning box, and to control the opening of the air volume balancing valve and / or control the supply air heat of the ceiling-mounted air-conditioning box based on the temperature of the mixed air flow, the indoor demand temperature and the internal negative ion concentration of the building envelope structure.

[0007] According to the non-powered photovoltaic curtain wall negative ion ventilation system provided by the present invention, the control device is further used for: In the heating mode, if it is detected that the temperature of the mixed airflow is greater than the indoor required temperature, and the internal negative ion concentration of the building envelope is greater than the required negative ion concentration, determining the temperature difference between the temperature of the mixed airflow and the indoor required temperature; According to a preset correlation between the temperature difference and the reduction of the opening degree, the reduction of the opening degree corresponding to the temperature difference is determined, and based on the reduction of the opening degree, the opening degree of the air volume balancing valve is reduced.

[0008] According to the non-powered photovoltaic curtain wall negative ion ventilation system provided by the present invention, the control device is further used for: In heating mode, if the opening of the air volume balancing valve is reduced to a preset minimum opening and the temperature of the mixed air flow is still greater than the indoor required temperature, the ceiling-mounted air-conditioning box is controlled to stop heating to control the air supply heat of the ceiling-mounted air-conditioning box.

[0009] According to the non-powered photovoltaic curtain wall negative ion ventilation system provided by the present invention, the control device is further used for: In cooling mode, if it is detected that the internal negative ion concentration of the building envelope structure is greater than the required negative ion concentration, the opening of the air volume balancing valve is adjusted to a preset minimum opening, and the cooling capacity of the ceiling-mounted air-conditioning box is adjusted according to the temperature difference between the temperature of the mixed air flow and the required indoor temperature to control the air supply heat of the ceiling-mounted air-conditioning box.

[0010] According to the non-powered photovoltaic curtain wall negative ion ventilation system provided by the present invention, the control device is further used for: In cooling mode, if it is detected that the internal negative ion concentration of the building envelope is less than or equal to the required negative ion concentration, determining a concentration difference between the required negative ion concentration and the internal negative ion concentration of the building envelope; According to a preset correlation between the concentration difference and the increased opening, the increased opening corresponding to the concentration difference is determined, and based on the increased opening, the opening of the air volume balancing valve is increased.

[0011] According to a non-powered photovoltaic curtain wall negative ion ventilation system provided by the present invention, the control device includes a human-computer interaction component; The human-computer interaction component is used to perform data interaction with the user.

[0012] According to the non-powered photovoltaic curtain wall negative ion ventilation system provided by the present invention, the air negative ion release structure is a tourmaline nanoparticle composite coating; The tourmaline nanoparticle composite coating is adhered to the back plate of the photovoltaic curtain wall.

[0013] According to a non-powered photovoltaic curtain wall negative ion ventilation system provided by the present invention, the air outlet end of the ceiling-mounted air-conditioning box is provided with a porous diffusion plate.

[0014] The non-powered photovoltaic curtain wall negative ion ventilation system provided by the present invention utilizes the electric energy generated by the photovoltaic curtain wall to maintain the operation of the system. At the same time, the temperature difference between the back panel heating and the surface temperature of the building envelope structure drives the chimney effect, so that fresh air enters the vertical ventilation channel through the bottom inlet and forms natural convection upward. At the same time, the air negative ion release structure combines with the air in the ventilation channel to generate negative ions. The hot air flow carries the negative ions and continues to rise under the action of the chimney effect. After reaching the top outlet, it enters the ceiling-mounted air-conditioning box after adjusting the direction through the diversion equipment. The ceiling-mounted air-conditioning box processes the negative ion air flow according to the operating mode and outputs the processed air flow to the internal space of the building envelope, realizing the integration of the three functions of power generation, negative ion generation and natural ventilation, reducing the energy consumption of the negative ion ventilation system, and promoting the coordinated improvement of building energy conservation and indoor environmental quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1It is a structural schematic diagram of the non-powered photovoltaic curtain wall negative ion ventilation system provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0017] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0018] At present, traditional negative ion generators require electricity to drive the fan, which has high energy consumption and relies on air filtration; at the same time, modern building ventilation mainly relies on mechanical fan systems, and fan energy consumption accounts for 20-30% of the total building electricity consumption.

[0019] Research into reducing the energy consumption of negative ion ventilation systems has revealed that the photovoltaic curtain wall systems that have emerged in recent years are still solely used as power generation components, failing to fully utilize the low-grade heat energy carried by the chimney effect within the air ducts. Existing photovoltaic curtain wall systems rarely utilize this thermal effect, and none are integrated with building ventilation or air purification technologies. This demonstrates that each of the three aforementioned areas faces technical bottlenecks: the application of negative ions in building environments is limited by significant transmission challenges, mechanical ventilation systems suffer from significant energy consumption and noise issues, and photovoltaic curtain wall technology lacks practical scenarios for utilizing thermoelectric coupling. In fact, these three areas are naturally complementary at a technical level. The chimney effect of the photovoltaic curtain wall's air ducts can drive ventilation airflow, while the photovoltaic curtain wall's photovoltaic backsheet incorporates functional tourmaline nanomaterials. Driven by the significant temperature difference between the photovoltaic backsheet and the building surface, these materials generate large quantities of negative ions. Combined with natural ventilation within the ducts, this not only avoids the significant energy consumption of traditional mechanical ventilation in buildings, but also spontaneously delivers fresh outdoor air rich in negative ions to the building, significantly improving indoor thermal comfort and air quality.

[0020] Based on the research findings, the present invention combines Building Integrated Photovoltaic (BIPV), negative ion generation technology, and ventilation system to provide a non-powered photovoltaic curtain wall negative ion ventilation system. Through the functional modification of the photovoltaic curtain wall surface and the optimized design of the cavity structure, the building envelope structure simultaneously has the triple functions of power generation, negative ion generation, and natural ventilation, thereby effectively solving the key problems of traditional technologies such as high energy consumption, secondary pollution, and single function.

[0021] Specifically, Figure 1 It is a structural schematic diagram of the non-powered photovoltaic curtain wall negative ion ventilation system provided by an embodiment of the present invention.

[0022] like Figure 1 As shown, the non-powered photovoltaic curtain wall negative ion ventilation system provided by an embodiment of the present invention may include a building envelope 10, a photovoltaic curtain wall 1, an air negative ion release structure 2, a flow guide device 5, and a ceiling-mounted air conditioning box 6. The pre-embedded connectors on the surface of the building envelope 10 are designed to be earthquake-resistant, ensuring a reliable connection between the photovoltaic curtain wall 1 and the surface of the building envelope 10.

[0023] In one embodiment, a photovoltaic curtain wall 1 is installed on the exterior of at least one surface of the building envelope 10, with ventilation channels 3 formed between the at least one surface. The photovoltaic curtain wall 1 is used to convert solar energy into electrical energy, powering a non-powered photovoltaic curtain wall negative ion ventilation system and other devices. For example, it can power a ceiling-mounted air conditioning unit 6.

[0024] In one specific implementation, the negative air ion release structure 2 can be a tourmaline nanoparticle composite coating located within the ventilation duct 3. Specifically, the tourmaline nanoparticle composite coating can be applied to the back panel of the photovoltaic curtain wall 1. This coating absorbs heat from the back panel and utilizes the pyroelectric effect and spontaneous polarization to generate a static voltage difference, ionizing air molecules flowing through the ventilation duct 3 and converting them into negative ions. The ventilation duct 3 utilizes an optimized cross-sectional design (e.g., maintaining a spacing of 20-40 cm between the ventilation ducts). This creates a stable upward airflow through the thermal pressure effect, achieving unpowered air circulation.

[0025] In a specific implementation process, in order to allow the rising negative ion airflow in the ventilation channel 3 to enter the ceiling-mounted air conditioning box 6, a guide device 5 can be set on the side of the ventilation channel 3 away from the ground, so as to use the guide device 5 to introduce the negative ion airflow into the ceiling-mounted air conditioning box 6. Figure 1 As shown, the flow guide device 5 is connected in an arc form to the photovoltaic curtain wall 1 and the corresponding suspended ceiling of the ceiling-type air-conditioning box 6, so that the rising negative ion airflow can be guided to flow into the ceiling-type air-conditioning box 6. Among them, an air volume balancing valve 8 can be set on the air supply channel between the flow guide device 5 and the ceiling-type air-conditioning box 6, and a control device 9 can be set inside the building envelope and connected to the air volume balancing valve 8 through wiring. The control device 9 can control the opening of the air volume balancing valve 8 to adjust the air flow entering the ceiling-type air-conditioning box 6.

[0026] In a specific implementation, a ceiling-mounted air conditioning unit 6 processes the negative ion airflow according to the operating mode and then outputs the processed airflow to the interior space of the building envelope 10. A porous diffuser 7 is provided at the air outlet of the ceiling-mounted air conditioning unit 6 to ensure uniform output of the processed airflow. The operating mode can be set automatically based on seasonal conditions, building heating and cooling requirements, and the airflow temperature at the air duct outlet, or it can be set manually based on commands. It can include heating and cooling modes.

[0027] Specifically, in heating mode, the negative ion airflow directly enters the indoor distribution system through the heat-insulating delivery pipeline. In cooling mode, the negative ion airflow is first cooled by the cooling treatment unit before entering the distribution system.

[0028] In a specific implementation, the non-powered photovoltaic curtain wall negative ion ventilation system may further include an air supply duct sensor, a return air temperature sensor, and an indoor negative ion concentration sensor (these sensors are not shown in the figure). The air supply duct sensor is used to collect the temperature of the air supply duct; the indoor temperature sensor is used to collect the return air temperature of the ceiling-mounted air conditioning unit 6; and the indoor negative ion concentration sensor is used to collect the negative ion concentration within the building envelope 10.

[0029] In a specific implementation process, the control device 9 is also used to determine the temperature of the mixed air flow entering the ceiling-mounted air-conditioning box 6 based on the temperature of the air supply duct and the return air temperature of the ceiling-mounted air-conditioning box 6, and control the opening of the air volume balancing valve 8 and / or control the supply air heat of the ceiling-mounted air-conditioning box 6 based on the temperature of the mixed air flow, the indoor demand temperature and the internal negative ion concentration of the building envelope structure 10.

[0030] Specifically, in the heating mode, if it is detected that the temperature of the mixed airflow is greater than the indoor required temperature, and the internal negative ion concentration of the building envelope structure 10 is greater than the required negative ion concentration, the temperature difference between the temperature of the mixed airflow and the indoor required temperature is determined; according to the correlation between the preset temperature difference and the reduced opening, the reduced opening corresponding to the temperature difference is determined, and based on the reduced opening, the opening of the air volume balancing valve 8 is reduced.

[0031] That is, in heating mode, if the negative ion concentration inside the building envelope 10 already meets the required negative ion concentration, and if the temperature of the mixed airflow obtained after the indoor return airflow and the fresh airflow from the air supply duct are mixed is greater than the required indoor temperature, then the opening of the air volume balancing valve 8 can be reduced to reduce the flow rate of the fresh airflow in the air supply duct, thereby reducing the temperature of the mixed airflow. The reduced opening corresponding to the temperature difference can be determined according to a predetermined correlation between the temperature difference and the reduced opening, so that the opening of the air volume balancing valve 8 is reduced based on the reduced opening.

[0032] In a specific implementation, in heating mode, if the opening of the air volume balancing valve 8 is reduced to a preset minimum opening and the temperature of the mixed air flow is still greater than the desired indoor temperature, the ceiling-mounted air conditioning box 6 is controlled to stop heating to control the air supply heat of the ceiling-mounted air conditioning box 6. In other words, to meet the negative ion concentration requirement, a minimum opening can be set. If the opening of the air volume balancing valve 8 is reduced to the preset minimum opening and the temperature of the mixed air flow is still greater than the desired indoor temperature, the temperature of the mixed air flow has met the user's desired temperature. At this time, the ceiling-mounted air conditioning box 6 can be controlled to stop heating to save energy.

[0033] In a specific implementation process, the preset minimum opening can be dynamically set according to the following method: A channel negative ion concentration sensor can be installed in the ventilation channel between the photovoltaic curtain wall and the surface of the building envelope 10 to detect the negative ion concentration generated in the ventilation channel in real time, determine the concentration difference between the negative ion concentration generated in the ventilation channel and the required negative ion concentration, and determine a preset minimum opening based on a preset correlation between the concentration difference and the opening to ensure the negative ion supply inside the building envelope 10. The correlation between the concentration difference and the opening can be set based on experimental data, etc., or can be set according to other methods, which will not be explained here.

[0034] In a specific implementation process, the control device 9 is also used to, in the cooling mode, adjust the opening of the air volume balancing valve 8 to a preset minimum opening if it is detected that the internal negative ion concentration of the building envelope structure 10 is greater than the required negative ion concentration, and adjust the cooling capacity of the ceiling-mounted air-conditioning box 6 according to the temperature difference between the temperature of the mixed air flow and the required indoor temperature to control the air supply heat of the ceiling-mounted air-conditioning box 6.

[0035] That is to say, in the cooling mode, the temperature of the mixed air flow is generally higher than the required indoor temperature. At this time, while meeting the required negative ion concentration, the amount of negative ion air flow supplied is reduced as much as possible, thereby reducing the temperature of the mixed air flow, so that the ceiling-mounted air-conditioning box 6 can perform cooling at lower energy consumption. Therefore, the opening of the air volume balancing valve 8 can be adjusted to a preset minimum opening, wherein the preset minimum opening can also be set according to the aforementioned dynamic setting method, which will not be repeated here.

[0036] In a specific implementation process, the control device 9 is also used to determine the concentration difference between the required negative ion concentration and the internal negative ion concentration of the building envelope structure 10 in the cooling mode if it is detected that the internal negative ion concentration of the building envelope structure 10 is less than or equal to the required negative ion concentration; determine the increased opening corresponding to the concentration difference based on the preset correlation between the concentration difference and the increased opening, and increase the opening of the air volume balancing valve 8 based on the increased opening.

[0037] It should be noted that in the cooling mode, in order to avoid excessive energy consumption of the ceiling-mounted air-conditioning box 6, the maximum opening of the air volume balancing valve 8 can be set to ensure that the opening of the air volume balancing valve 8 does not exceed the maximum opening when increasing the opening, thereby balancing the negative ion concentration and the energy consumption of the ceiling-mounted air-conditioning box 6.

[0038] The unpowered photovoltaic curtain wall negative ion ventilation system of this embodiment utilizes the electric energy generated by the photovoltaic curtain wall 1 to maintain the operation of the system. At the same time, the temperature difference between the back panel heating and the surface temperature of the building envelope 10 drives the chimney effect, so that the fresh air enters the vertical ventilation channel 3 through the bottom inlet and forms natural convection upward; at the same time, the air negative ion release structure 2 releases negative ions in the ventilation channel 3, and the hot air flow carries the negative ions and continues to rise under the action of the chimney effect, reaches the top outlet, and enters the ceiling air-conditioning box 6 after adjusting the direction through the guide device 5; the ceiling air-conditioning box 6 processes the negative ion airflow according to the operating mode, and outputs the processed airflow to the internal space of the building envelope 10, realizing the integration of the triple functions of power generation, negative ion generation and natural ventilation, and reducing the energy consumption of the negative ion ventilation system.

[0039] In a specific implementation, the control device 9 may include a human-computer interaction component for interacting with the user. For example, the human-computer interaction component may display operating parameters and alarm information in real time, and receive user control commands. Operating parameters may include indoor temperature, negative ion concentration, etc.

[0040] In a specific implementation process, the operation process of the unpowered photovoltaic curtain wall negative ion ventilation system is as follows: 1. System startup phase: The photovoltaic curtain wall 1 converts solar energy into electricity, providing power for the entire system. When the system starts, it automatically detects the ambient temperature and selects heating or cooling operation mode.

[0041] 2. Airflow drive and negative ion generation stage: The heated backsheet of the photovoltaic curtain wall 1 creates a temperature difference with the outside air, driving fresh air naturally into the vertical ventilation duct 3 from the bottom inlet. As the air flows through the tourmaline nanoparticle composite coating on the backsheet of the photovoltaic curtain wall 1, it is heated and generates negative ions. Due to the chimney effect, the hot air, carrying the negative ions, continues to rise.

[0042] 3. Airflow processing and distribution stage: When the updraft reaches the top of the flow channel: ① Heating mode: The airflow carrying negative ions directly enters the indoor distribution system through the heat-insulating delivery pipeline; ② Refrigeration mode: The airflow carrying negative ions first passes through the cooling treatment unit to cool down, and then enters the distribution system.

[0043] The flow guiding device 5 can automatically adjust the direction of the airflow according to the control system instructions to ensure the best conveying effect.

[0044] 4. Intelligent control stage: The intelligent control system monitors parameters such as ion concentration, temperature and wind speed in real time through a sensor network, and dynamically adjusts the opening of the air volume balancing valve 8 to ensure stable operation of the system. The system can automatically adjust the operating mode according to seasonal changes.

[0045] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., they may be located in one location or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of the present embodiment. Persons of ordinary skill in the art will be able to understand and implement the present invention without inventive effort.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention 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 make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A non-powered photovoltaic curtain wall negative ion ventilation system, characterized in that: Including building envelope, photovoltaic curtain wall, air negative ion release structure, diversion equipment and ceiling-mounted air conditioning box; The photovoltaic curtain wall is laid on the outside of at least one surface of the building envelope, and a ventilation channel is left between the at least one surface; the photovoltaic curtain wall is used to convert light energy into electrical energy; The negative air ion release structure is located in the ventilation channel, wherein the negative air ion release structure is used to generate a thermoelectric effect under the thermal effect of the back plate of the photovoltaic curtain wall, so that the air in the ventilation channel forms negative ions under the thermoelectric effect and forms an upward negative ion airflow under the chimney effect; The flow guide device is located on a side of the ventilation channel away from the ground, and is used to introduce negative ion airflow into the ceiling-mounted air conditioning box; The ceiling-mounted air-conditioning box is used to process the negative ion airflow according to the operation mode and output the processed airflow to the internal space of the building envelope structure.

2. The unpowered photovoltaic curtain wall negative ion ventilation system according to claim 1, characterized in that: Also includes air volume balancing valves and control equipment; The air volume balancing valve is arranged on the air supply channel between the flow guide device and the ceiling-mounted air conditioning box, and the air volume balancing valve is connected to the control device; The control device is used to control the opening of the air volume balancing valve to adjust the air flow rate entering the ceiling-mounted air conditioning box.

3. The non-powered photovoltaic curtain wall negative ion ventilation system according to claim 2, characterized in that: It also includes air supply duct sensor, return air temperature sensor and indoor negative ion concentration sensor; The air supply channel sensor is used to collect the temperature of the air supply channel; The indoor temperature sensor is used to collect the return air temperature of the ceiling-mounted air conditioning box; The indoor negative ion concentration sensor is used to collect the internal negative ion concentration of the building envelope; The control device is also used to determine the temperature of the mixed air flow entering the ceiling-mounted air-conditioning box based on the temperature of the air supply duct and the return air temperature of the ceiling-mounted air-conditioning box, and to control the opening of the air volume balancing valve and / or control the supply air heat of the ceiling-mounted air-conditioning box based on the temperature of the mixed air flow, the indoor demand temperature and the internal negative ion concentration of the building envelope structure.

4. The non-powered photovoltaic curtain wall negative ion ventilation system according to claim 3, characterized in that: The control device is also used to: In the heating mode, if it is detected that the temperature of the mixed airflow is greater than the indoor required temperature, and the internal negative ion concentration of the building envelope is greater than the required negative ion concentration, determining the temperature difference between the temperature of the mixed airflow and the indoor required temperature; According to a preset correlation between the temperature difference and the reduction of the opening degree, the reduction of the opening degree corresponding to the temperature difference is determined, and based on the reduction of the opening degree, the opening degree of the air volume balancing valve is reduced.

5. The non-powered photovoltaic curtain wall negative ion ventilation system according to claim 4, characterized in that: The control device is also used to: In heating mode, if the opening of the air volume balancing valve is reduced to a preset minimum opening and the temperature of the mixed air flow is still greater than the indoor required temperature, the ceiling-mounted air-conditioning box is controlled to stop heating to control the air supply heat of the ceiling-mounted air-conditioning box.

6. The non-powered photovoltaic curtain wall negative ion ventilation system according to claim 3, characterized in that: The control device is also used to: In cooling mode, if it is detected that the internal negative ion concentration of the building envelope structure is greater than the required negative ion concentration, the opening of the air volume balancing valve is adjusted to a preset minimum opening, and the cooling capacity of the ceiling-mounted air-conditioning box is adjusted according to the temperature difference between the temperature of the mixed air flow and the required indoor temperature to control the air supply heat of the ceiling-mounted air-conditioning box.

7. The non-powered photovoltaic curtain wall negative ion ventilation system according to claim 6, characterized in that: The control device is also used to: In cooling mode, if it is detected that the internal negative ion concentration of the building envelope is less than or equal to the required negative ion concentration, determining a concentration difference between the required negative ion concentration and the internal negative ion concentration of the building envelope; According to a preset correlation between the concentration difference and the increased opening, the increased opening corresponding to the concentration difference is determined, and based on the increased opening, the opening of the air volume balancing valve is increased.

8. The unpowered photovoltaic curtain wall negative ion ventilation system according to any one of claims 2 to 5, characterized in that: The control device includes a human-computer interaction component; The human-computer interaction component is used to perform data interaction with the user.

9. The non-powered photovoltaic curtain wall negative ion ventilation system according to any one of claims 1 to 7, characterized in that: The negative air ion release structure is a tourmaline nanoparticle composite coating; The tourmaline nanoparticle composite coating is adhered to the back plate of the photovoltaic curtain wall.

10. The non-powered photovoltaic curtain wall negative ion ventilation system according to any one of claims 1 to 7, characterized in that: The air outlet end of the ceiling-mounted air-conditioning box is provided with a porous diffusion plate.

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