Solar photo-thermal all-in-one machine and outdoor solar photo-thermal system

Abstract

The utility model discloses a solar photo-thermal all-in-one machine and an outdoor solar photo-thermal system. The solar photo-thermal all-in-one machine comprises a heat exchanger; one end of the primary side circulation pipeline is connected with a solar heat collector, the other end of the primary side circulation pipeline is connected with the heat exchanger, and the primary side circulation pipeline is connected with a first air pressure balance tank; and one end of the secondary side circulation pipeline is connected with a heat utilization tail end, the other end of the secondary side circulation pipeline is connected with the heat exchanger, and the secondary side circulation pipeline is connected with a second air pressure balance tank. The first air pressure balance tank is connected to the primary side circulation pipeline, the second air pressure balance tank is connected to the secondary side circulation pipeline, the effect of balancing the pressure in the pipeline can be achieved, pressure can be relieved in time when the pressure of the pipeline is increased, and the safety of system equipment is guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of solar energy utilization, and particularly to a solar thermal integrated machine and an outdoor solar thermal system. Background Art

[0002] At present, with the gradual reduction of traditional fossil fuels such as petroleum, coal, and natural gas, and the increasingly severe environmental problems brought about by the use of these fossil fuels, the development of various clean energy and renewable energy utilization technologies has received more and more attention. Among them, using large-scale solar collectors on buildings to centrally supply domestic hot water for buildings is an effective means of renewable energy utilization and has excellent environmental protection performance. Therefore, its development and application have been very rapid in recent years.

[0003] The prior art CN214249771U discloses a household solar thermal heating integrated control device, which can connect a solar collector and a heat-using end. The water inlet of the heating end of the device is connected to the water inlet of the circulating pump at the heating end, the water outlet of the circulating pump at the heating end is connected to the water inlet of the heating end of the plate heat exchanger, and the water outlet of the heating end of the plate heat exchanger is connected to the water outlet of the heating end of the device; the water inlet of the heat-using end of the plate heat exchanger is connected to the water return port of the heat-using end of the device, the water outlet of the heat-using end of the plate heat exchanger is connected to the water inlet of the constant temperature water tank, the water outlet of the constant temperature water tank is connected to the water inlet of the circulating pump at the heat-using end, and the water outlet of the circulating pump at the heat-using end is then connected to the water outlet of the heat-using end of the device.

[0004] The above prior art has the following defects: The water inlet of the heating end of the device is connected to the plate heat exchanger through the circulating pump at the heating end, and the water outlet of the heat-using end of the device is connected to the plate heat exchanger through the circulating pump at the heat-using end and the constant temperature water tank. No air pressure balance or pressure relief device is provided in these two pipeline connections. In this way, when the pressure in the pipeline increases, it cannot be relieved in time, which may damage the entire system and lead to safety accidents. Therefore, there is a certain risk. Summary of the Utility Model

[0005] The present application provides a solar thermal integrated machine and an outdoor solar thermal system. By connecting a first air pressure balance tank to the primary side circulation pipeline and a second air pressure balance tank to the secondary side circulation pipeline, it can play a role in balancing the pressure in the pipeline, and can relieve the pressure in time when the pipeline pressure increases, ensuring the safety of the system equipment.

[0006] According to some embodiments, the present application provides a solar thermal integrated machine, comprising: a heat exchanger; a primary side circulation pipeline, one end of the primary side circulation pipeline is connected to a solar collector, the other end is connected to the heat exchanger, and a first air pressure balance tank is connected to the primary side circulation pipeline; a secondary side circulation pipeline, one end of the secondary side circulation pipeline is connected to a heat utilization terminal, the other end is connected to the heat exchanger, and a second air pressure balance tank is connected to the secondary side circulation pipeline.

[0007] Optionally, the primary side circulation pipeline includes a primary side liquid inlet pipeline and a primary side liquid outlet pipeline. One end of the primary side liquid inlet pipeline is connected to the output end of the solar collector, and the other end is connected to the heat supply inlet end of the heat exchanger; one end of the primary side liquid outlet pipeline is connected to the input end of the solar collector, and the other end is connected to the heat supply outlet end of the heat exchanger; preferably, a first exhaust valve is provided at the highest point of the primary side liquid outlet pipeline.

[0008] Optionally, the primary side circulation pipeline further includes a primary side bypass liquid inlet pipeline. Both ends of the primary side bypass liquid inlet pipeline are respectively connected in parallel to the primary side liquid inlet pipeline, and primary side transfer pumps are respectively provided on the primary side bypass liquid inlet pipeline and the primary side liquid inlet pipeline.

[0009] Optionally, a primary side switch valve is further provided on the primary side liquid inlet pipeline, and a primary side drain valve is provided at the front end of the primary side switch valve on the primary side liquid inlet pipeline; a liquid supplement valve is further provided on the primary side liquid inlet pipeline, and the liquid supplement valve is located at the rear end of the primary side switch valve.

[0010] Optionally, the secondary side circulation pipeline includes a secondary side liquid inlet pipeline and a secondary side liquid outlet pipeline. One end of the secondary side liquid inlet pipeline is connected to the output end of the heat utilization terminal, and the other end is connected to the return water interface of the heat utilization end of the heat exchanger; one end of the secondary side liquid outlet pipeline is connected to the input end of the heat utilization terminal, and the other end is connected to the water outlet interface of the heat utilization end of the heat exchanger; a second exhaust valve is provided at the highest point of the secondary side liquid inlet pipeline.

[0011] Optionally, the secondary side circulation pipeline further includes a secondary side bypass liquid inlet pipeline. Both ends of the secondary side bypass liquid inlet pipeline are respectively connected in parallel to the secondary side liquid inlet pipeline, and secondary side transfer pumps are respectively provided on the secondary side bypass liquid inlet pipeline and the secondary side liquid inlet pipeline.

[0012] According to some embodiments, the present application further provides an outdoor solar thermal system, comprising a cabinet and the above-mentioned solar thermal integrated machine, and the solar thermal integrated machine is integrally installed in the cabinet.

[0013] Optionally, a heat dissipation part is provided on the cabinet body, and the heat dissipation part is used for dissipating the heat generated by the solar photovoltaic-thermal integrated machine in the cabinet body during operation.

[0014] Optionally, the heat dissipation part includes a first fan and a second fan, and the first fan and the second fan are respectively arranged oppositely on both sides of the cabinet body; the first fan blows the natural wind outside into the cabinet body; the second fan extracts the hot air in the cabinet body to the outside.

[0015] Optionally, a warning strip is further provided on the cabinet body, and the warning strip is used for displaying the working state of the solar photovoltaic-thermal integrated machine inside.

[0016] The embodiments of the present disclosure have at least the following advantages:

[0017] In this embodiment, a first air pressure balance tank is connected to the primary side circulation pipeline, and a second air pressure balance tank is connected to the secondary side circulation pipeline. When the pressure in the primary side circulation pipeline increases, timely pressure relief can be carried out through the first air pressure balance tank. When the pressure in the secondary side circulation pipeline increases, timely pressure relief can be carried out through the second air pressure balance tank. Therefore, by using the first air pressure balance tank and the second air pressure balance tank, the use safety of the system equipment can be ensured and the risk can be reduced. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 is the structural schematic diagram of the solar photovoltaic-thermal integrated machine in the embodiment of the present application Figure 1 ;

[0020] Figure 2 is the structural schematic diagram of the solar photovoltaic-thermal integrated machine in the embodiment of the present application Figure 2 ;

[0021] Figure 3 is the structural schematic diagram of the outdoor solar photovoltaic-thermal system in the embodiment of the present application Figure 1 ;

[0022] Figure 4 is the structural schematic diagram of the outdoor solar photovoltaic-thermal system in the embodiment of the present application Figure 2 .

[0023] Reference numerals: 1, heat exchanger; 11, heat supply water inlet interface; 12, heat supply water outlet interface; 13, heat consumption end water inlet interface; 14, heat consumption end return water interface; 2, primary side circulation pipeline; 21, primary side liquid inlet pipeline; 211, primary side switch valve; 212, primary side drain valve; 213, liquid supplement valve; 22, primary side liquid outlet pipeline; 221, first exhaust valve; 23, primary side bypass liquid inlet pipeline; 24, primary side transfer pump; 3, first air pressure balance tank; 31, first air pressure pipe; 4, secondary side circulation pipeline; 41, secondary side liquid inlet pipeline; 411, second exhaust valve; 42, secondary side liquid outlet pipeline; 43, secondary side bypass liquid inlet pipeline; 44, secondary side transfer pump; 5, second air pressure balance tank; 51, second air pressure pipe; 6, cabinet; 71, first fan; 72, second fan; 8, warning tape. Detailed implementation manners

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the following will elaborate on each embodiment of the present application with reference to the accompanying drawings. However, those of ordinary skill in the art can understand that in each embodiment of the present application, many technical details are provided to help readers better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed in the present application can still be implemented. The following division of each embodiment is for convenience of description and should not constitute any limitation on the specific implementation manner of the present application. Each embodiment can be combined with and cited from each other on the premise of no contradiction.

[0025] The following will detail a solar thermal and photovoltaic integrated machine provided in this embodiment with reference to the accompanying drawings. Please refer to Figure 1 、 Figure 2 As shown in the figure, it includes: a heat exchanger 1, a primary side circulation pipeline 2, and a secondary side circulation pipeline 4. One end of the primary side circulation pipeline 2 is connected to a solar collector, and the other end is connected to the heat exchanger 1. Moreover, a first air pressure balance tank 3 is also connected to the primary side circulation pipeline 2. One end of the secondary side circulation pipeline 4 is connected to a heat consumption end, and the other end is connected to the heat exchanger 1. Moreover, a second air pressure balance tank 5 is connected to the secondary side circulation pipeline 4.

[0026] In this embodiment, the solar collector absorbs solar energy and converts it into heat energy, which is used to heat the heat medium in the primary side circulation pipeline 2, such as ethylene glycol or water. The heated heat medium is transported through the primary side circulation pipeline 2 into the heat exchanger 1, where the heat medium exchanges heat with the cold water transported by the secondary side circulation pipeline 4. The heated hot water is then transported through the secondary side circulation pipeline 4 to the heat-using end for use. In this process, by using the first air pressure balance tank 3 and the second air pressure balance tank 5, the air pressure stability of the primary side circulation pipeline 2 and the secondary side circulation pipeline 4 during use can be ensured. For example, when the pressure in the primary side circulation pipeline 2 is abnormal, such as increasing, the first air pressure balance tank 3 can be used to release the pressure in a timely manner. When the pressure in the secondary side circulation pipeline 4 is abnormal, such as increasing, the second air pressure balance tank 5 can be used to release the pressure in a timely manner, thus ensuring the safety of equipment use. The primary side circulation pipeline 2 uses water or ethylene glycol as the heat conduction medium, and with the intelligent control program, it can operate under the condition of less than 0 degrees at night, solving the problem that the solar energy system cannot be used in some areas with large temperature differences between day and night and the temperature being lower than zero at night.

[0027] Please continue to refer to Figure 1 、 Figure 2 As shown, in this embodiment, it should be noted that the primary side circulation pipeline 2 includes a primary side liquid inlet pipeline 21 and a primary side liquid outlet pipeline 22. One end of the primary side liquid inlet pipeline 21 is connected to the output end of the solar collector, and the other end is connected to the heat supply inlet end 11 of the heat exchanger 1. One end of the primary side liquid outlet pipeline 22 is connected to the input end of the solar collector, and the other end is connected to the heat supply outlet end 12 of the heat exchanger 1. The solar collector absorbs solar energy and converts it into heat energy, which is used to heat the heat medium transported in the primary side liquid outlet pipeline 22. The heated heat medium is transported through the primary side liquid inlet pipeline 21 into the heat exchanger 1. After the heat medium exchanges heat with the water in the secondary side circulation pipeline 4 in the heat exchanger 1, it returns to the input end of the solar collector through the primary side liquid outlet pipeline 22 for reheating, thus realizing a cycle. At the same time, the bottom of the first air pressure balance tank 3 is connected to the primary side liquid inlet pipeline 21 through the first air pressure pipe 31. When the pressure in the primary side liquid inlet pipeline 21 increases, the air pressure enters the first air pressure balance tank 3 through the first air pressure pipe 31 for pressure relief.

[0028] Please continue to refer to Figure 1 、 Figure 2As shown, further, the primary side circulation pipeline 2 further includes a primary side bypass liquid inlet pipeline 23. The two ends of the primary side bypass liquid inlet pipeline 23 are respectively connected in parallel to the primary side liquid inlet pipeline 21, and primary side transfer pumps 24 are respectively arranged on the primary side bypass liquid inlet pipeline 23 and the primary side liquid inlet pipeline 21. Connecting the primary side bypass liquid inlet pipeline 23 in parallel on the primary side circulation pipeline 2 can play a role of one for use and one for standby, and can also be enabled simultaneously when necessary to increase the heat input. Preferably, the primary side transfer pump 24 is set as a canned motor pump. With the canned motor pump setting, the noise is small, and the influence of noise on the surrounding residents can be reduced during the use of the equipment.

[0029] In some embodiments, a first exhaust valve 221 is arranged at the highest point of the primary side liquid outlet pipeline 22. By arranging the first exhaust valve 221, the operator can manually open the first exhaust valve 221 regularly to exhaust the primary side liquid outlet pipeline 22.

[0030] Further, a primary side shut-off valve 211 is also arranged on the primary side liquid inlet pipeline 21, and a primary side drain valve 212 is arranged on the primary side liquid inlet pipeline 21 and at the front end of the primary side shut-off valve 211. The flow of the heat medium can be controlled by the opening and closing of the primary side shut-off valve 211. At the same time, by arranging the primary side drain valve 212 at the front end of the primary side shut-off valve 211, the sewage or impurities in the primary side liquid inlet pipeline 21 can be discharged regularly.

[0031] Further, a liquid filling valve 213 is also arranged on the primary side liquid inlet pipeline 21. The liquid filling valve 213 is located at the rear end of the primary side shut-off valve 211 and at the front end of the primary side transfer pump 24. The use of the liquid filling valve 213 can facilitate the addition of a heat medium such as ethylene glycol into the primary side liquid inlet pipeline 21. When filling the liquid, close the primary side shut-off valve 211, open the primary side drain valve 212 and the liquid filling valve 213, and add ethylene glycol into the primary side circulation pipeline 2 through the liquid filling valve 213. When ethylene glycol flows out from the position of the primary side drain valve 212, it is considered that the primary side circulation pipeline 2 is already filled with ethylene glycol.

[0032] Please continue to refer to Figure 1 、 Figure 2As shown, in this embodiment, it should also be noted that the secondary side circulation pipeline 4 includes a secondary side liquid inlet pipeline 41 and a secondary side liquid outlet pipeline 42. One end of the secondary side liquid inlet pipeline 41 is connected to the output end of the heat-using terminal, and the other end is connected to the return water interface 13 of the heat-using end of the heat exchanger 1; one end of the secondary side liquid outlet pipeline 42 is connected to the input end of the heat-using terminal, and the other end is connected to the water outlet interface 14 of the heat-using end of the heat exchanger 1. The secondary side liquid inlet pipeline 41 transports the cold water of the heat-using terminal into the heat exchanger 1, where the cold water exchanges heat with the heat medium. The heated hot water is transported to the heat-using terminal through the secondary side liquid outlet pipeline 42 for use. At the same time, the bottom of the second air pressure balance tank 5 is connected to the secondary side liquid inlet pipeline 41 through a second air pressure pipe 51. When the pressure in the secondary side liquid inlet pipeline 41 increases, the air pressure enters the second air pressure balance tank 5 through the second air pressure pipe 51 for pressure relief.

[0033] Please continue to refer to Figure 1 、 Figure 2 As shown, further, the secondary side circulation pipeline 4 further includes a secondary side bypass liquid inlet pipeline 43. Both ends of the secondary side bypass liquid inlet pipeline 43 are respectively connected in parallel to the secondary side liquid inlet pipeline 41, and secondary side transfer pumps 44 are respectively arranged on the secondary side bypass liquid inlet pipeline 43 and the secondary side liquid inlet pipeline 41. Connecting the secondary side bypass liquid inlet pipeline 43 in parallel on the secondary side circulation pipeline 4 can play a role of one for use and one for standby, and can also be started simultaneously when necessary to increase the heat output. Preferably, the secondary side transfer pump 44 is set as a canned motor pump. With the canned motor pump setting, there is less noise, and it can reduce the impact of noise on surrounding residents during equipment use.

[0034] In some embodiments, a second exhaust valve 411 is provided at the highest point of the secondary side liquid inlet pipeline 41. Through the function of the second exhaust valve 411, manual exhaust operation can be regularly performed on the secondary side liquid inlet pipeline 41.

[0035] Further, a makeup water valve 412 is also provided on the pipeline where the secondary side liquid inlet pipeline 41 and the second air pressure pipe 51 are interconnected. Through the makeup water valve 412, water can be replenished into the secondary side liquid inlet pipeline 41.

[0036] In this embodiment, it should also be noted that the transfer pumps on the primary side circulation pipeline 2 and the secondary side circulation pipeline 4 can be switched in mode according to different temperature conditions that occur during the operation of the solar thermal integrated machine; for example, when it is detected that the temperature of the solar thermal integrated machine is relatively high at 38 degrees, the primary side circulation pipeline 2 is controlled to operate normally, and the secondary side transfer pump 44 on the secondary side circulation pipeline 4 is controlled to operate in parallel at the same time to increase the heat output; when the temperature is extremely high at 40 degrees, the primary side circulation pipeline 2 is controlled to stop, and the secondary side circulation pipeline 4 operates normally to ensure that the internal temperature of the solar thermal integrated machine does not exceed the limit.

[0037] Implementation principle of this embodiment: The first air pressure balance tank 3 is connected to the primary side liquid inlet pipeline 21 through the first air pressure pipe 31. During the operation of the primary side transfer pump 24, when the pressure in the primary side liquid inlet pipeline 21 is abnormal, such as increasing, the air pressure enters the first air pressure balance tank 3 through the first air pressure pipe 31 for pressure relief; the second air pressure balance tank 5 is connected to the secondary side liquid inlet pipeline 41 through the second air pressure pipe 51. During the operation of the secondary side transfer pump 44, when the pressure in the secondary side liquid inlet pipeline 41 is abnormal, such as increasing, the air pressure enters the second air pressure balance tank 5 through the second air pressure pipe 51 for pressure relief; thus, during the use of the solar thermal integrated machine, by using the first air pressure balance tank 3 and the second air pressure balance tank 5, the use safety of the equipment can be ensured.

[0038] This embodiment also provides an outdoor solar thermal system. Referring to Figure 1 , Figure 3 and Figure 4 as shown, it includes a cabinet 6 and the above-mentioned solar thermal integrated machine, and the solar thermal integrated machine is integrally installed in the cabinet 6. Integrally installing the solar thermal integrated machine into the cabinet 6 and then moving the cabinet 6 outdoors for installation and use can avoid occupying indoor space, be more flexible in installation, have a wide range of uses, and can prevent wind and rain when used outdoors, thus extending the service life of the solar thermal integrated machine.

[0039] In this embodiment, it should be noted that a heat dissipation part is also provided on the cabinet 6, and the heat dissipation part is used to dissipate the heat generated by the solar thermal integrated machine in the cabinet 6 during operation. Since the solar thermal integrated machine is integrated in the cabinet 6 and the cabinet 6 belongs to a closed space, the heat generated during the operation of the solar thermal integrated machine is basically concentrated in the cabinet 6. Therefore, this part of the heat needs to be dissipated in time, and then a heat dissipation part is provided on the cabinet 6 to dissipate the heat in the cabinet 6 in time through the action of the heat dissipation part.

[0040] In one example, the heat dissipation part includes a first fan 71 and a second fan 72, and the first fan 71 and the second fan 72 are respectively arranged opposite to each other on both sides of the cabinet 6; the first fan 71 blows the natural wind from the outside into the cabinet 6; the second fan 72 sucks the hot air in the cabinet 6 to the outside. When the first fan 71 and the second fan 72 are turned on, the first fan 71 blows the natural wind from the outside into the cabinet 6, and the natural wind flows in the cabinet 6. During the flowing process, the heat generated by the solar thermal integrated machine is absorbed, and then the second fan 72 takes out this part of the hot air that has absorbed heat from the cabinet 6, thereby realizing heat dissipation and ventilation of the cabinet 6.

[0041] Of course, in this embodiment, the structure for dissipating heat and ventilating the cabinet body 6 is not limited to the first fan 71 and the second fan 72, and components with other structures are also acceptable. No specific limitation is made in this embodiment.

[0042] In some embodiments, a warning strip 8 is further provided on the cabinet body 6. The warning strip 8 is used to display the working state of the internal solar photovoltaic-thermal integrated machine. With this arrangement, it is convenient for the staff to judge the working state of the internal solar photovoltaic-thermal integrated machine through the warning strip 8 from the outside, which is relatively intuitive and convenient. For example, when the warning strip 8 shows green, it indicates that the solar photovoltaic-thermal integrated machine is operating normally; when it shows red, it indicates that there is a fault in the solar photovoltaic-thermal integrated machine, and so on.

[0043] In this embodiment, it should be noted that the solar photovoltaic-thermal integrated machine and the cabinet body 6 adopt an integral design and are directly hoisted into place outdoors as a whole. The installation space is small and the on-site construction is simple, solving the problem that there is no reserved equipment room in the indoor design.

[0044] It should be understood that the above specific embodiments of the present application are only used for exemplary illustration or explanation of the principle of the present application, and do not constitute a limitation to the present application. Therefore, any modifications, equivalent replacements, improvements, etc. made without departing from the spirit and scope of the present application shall be included within the protection scope of the present application. In addition, the appended claims of the present application are intended to cover all changes and modifications that fall within the scope and boundary of the appended claims, or equivalent forms of such scope and boundary.

Claims

1. A solar thermal integrated machine, characterized in that: include: Heat exchanger (1); A primary side circulation pipeline (2), one end of the primary side circulation pipeline (2) is connected to the solar thermal collector, and the other end is connected to the heat exchanger (1), and a first air pressure balance tank (3) is connected to the primary side circulation pipeline (2); A secondary circulation pipeline (4), one end of which is connected to a hot end and the other end of which is connected to the heat exchanger (1), and a second air pressure balance tank (5) is connected to the secondary circulation pipeline (4).

2. The solar thermal integrated machine according to claim 1, characterized in that: The primary side circulation pipeline (2) comprises a primary side liquid inlet pipeline (21) and a primary side liquid outlet pipeline (22); one end of the primary side liquid inlet pipeline (21) is connected to the output end of the solar thermal collector, and the other end is connected to the heat supply inlet end (11) of the heat exchanger (1); one end of the primary side liquid outlet pipeline (22) is connected to the input end of the solar thermal collector, and the other end is connected to the heat supply outlet end (12) of the heat exchanger (1).

3. The solar thermal integrated machine according to claim 2, characterized in that: A first exhaust valve (221) is provided at the highest point of the primary liquid outlet pipeline (22).

4. The solar thermal integrated machine according to claim 2, characterized in that: The primary side circulation pipeline (2) further comprises a primary side bypass liquid inlet pipeline (23), both ends of which are respectively connected in parallel to the primary side liquid inlet pipeline (21), and primary side delivery pumps (24) are respectively provided on the primary side bypass liquid inlet pipeline (23) and the primary side liquid inlet pipeline (21).

5. The solar thermal integrated machine according to claim 2, characterized in that: A primary side switch valve (211) is also provided on the primary side liquid inlet pipeline (21), and a primary side drain valve (212) is also provided on the primary side liquid inlet pipeline (21) and located at the front end of the primary side switch valve (211); a liquid replenishing valve (213) is also provided on the primary side liquid inlet pipeline (21), and the liquid replenishing valve (213) is located at the rear end of the primary side switch valve (211).

6. The solar thermal integrated machine according to any one of claims 1 to 5, characterized in that: The secondary side circulation pipeline (4) comprises a secondary side liquid inlet pipeline (41) and a secondary side liquid outlet pipeline (42); one end of the secondary side liquid inlet pipeline (41) is connected to the output end of the heat use end, and the other end is connected to the return water interface (13) of the heat use end of the heat exchanger (1); one end of the secondary side liquid outlet pipeline (42) is connected to the input end of the heat use end, and the other end is connected to the water outlet interface (14) of the heat use end of the heat exchanger (1); a second exhaust valve (411) is provided at the highest point of the secondary side liquid inlet pipeline (41).

7. The solar thermal integrated machine according to claim 6, characterized in that: The secondary circulation pipeline (4) further comprises a secondary bypass liquid inlet pipeline (43), both ends of which are respectively connected in parallel to the secondary liquid inlet pipeline (41), and secondary delivery pumps (44) are respectively provided on the secondary bypass liquid inlet pipeline (43) and the secondary liquid inlet pipeline (41).

8. An outdoor solar thermal system, characterized in that: It comprises a cabinet (6) and a solar thermal integrated machine as claimed in any one of claims 1 to 7, wherein the solar thermal integrated machine is installed as a whole in the cabinet (6).

9. The outdoor solar thermal system according to claim 8, characterized in that: The cabinet (6) is provided with a heat dissipation portion, and the heat dissipation portion is used to dissipate the heat generated by the solar thermal integrated machine in the cabinet (6) during operation.

10. The outdoor solar thermal system according to claim 9, characterized in that: The heat dissipation unit comprises a first fan (71) and a second fan (72), wherein the first fan (71) and the second fan (72) are respectively arranged on two sides of the cabinet (6) opposite to each other; The first fan (71) blows natural wind from the outside into the cabinet (6); The second fan (72) draws hot air in the cabinet (6) to the outside.

11. The outdoor solar thermal system according to claim 8, characterized in that: The cabinet (6) is also provided with a warning tape (8), and the warning tape (8) is used to display the working status of the solar thermal integrated machine inside.

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