A hot and cold water system based on photovoltaic heat

Abstract

The invention discloses a hot and cold water system based on photovoltaic heat, including a chiller and a photovoltaic module, the chiller including a first heat exchanger, a second heat exchanger, a third heat exchanger, a fourth heat exchanger and a fifth heat exchanger, the photovoltaic module including a plurality of photovoltaic power generation modules, the upper and lower sides of the first heat exchanger are correspondingly provided with a first sprayer and a first collecting tank, the upper and lower sides of the second heat exchanger are correspondingly provided with a second sprayer and a second collecting tank, the upper and lower sides of the fifth heat exchanger are correspondingly provided with a third sprayer and a third collecting tank, the photovoltaic power generation module includes a frame and a photovoltaic panel installed in the frame, the lower side of the photovoltaic panel is provided with a radiator, and the two ports of all radiators in the photovoltaic module after being connected in parallel are correspondingly connected with the two ports of the fifth heat exchanger to form a heat exchange circulation loop. It has the advantages of simple structure, stable performance, safety and reliability, and high energy efficiency ratio.

Description

Technical Field

[0001] The invention relates to the fields of photovoltaic power generation and air conditioning, and in particular to a hot and cold water system utilizing photovoltaic heat to regenerate a salt solution. Background Art

[0002] With the development of economy and society, people's environmental awareness is getting stronger and stronger. In order to protect the environment and reduce the application of primary energy, photovoltaic power generation systems and ground source heat pump systems have been rapidly developed and applied. Photovoltaic power generation systems are generally composed of multiple photovoltaic power generation modules. The power generation of photovoltaic power generation modules will decrease with the increase of temperature, mainly because the charge carriers of photovoltaic panels will accelerate their movement due to the increase of temperature, and the electric field formed by doping can only "capture" fewer carriers. In order to solve the problem that the power generation of photovoltaic power generation modules decreases with the increase of temperature, technicians in this field usually adopt the technical means of adding a radiator to the photovoltaic panel to discharge the heat generated by the photovoltaic panel through the radiator to keep it at a relatively low temperature, which will cause heat waste. In addition, the radiator of the existing photovoltaic power generation module has the problems of complex structure, large space occupation, low heat exchange efficiency and poor heat dissipation effect, which affects the power generation efficiency of the photovoltaic power generation module. As the ground source heat pump system increases in service life, more and more heat will be taken out of the soil, the temperature of the soil will become lower and lower, and the working efficiency of the ground source heat pump system will become worse and worse, affecting the service life. Summary of the invention

[0003] The purpose of the present invention is to provide a photovoltaic-based hot and cold water system, which has the advantages of simple structure, stable performance, safety and reliability, and high energy efficiency ratio.

[0004] In order to solve the above problems existing in the prior art, the present invention provides a hot and cold water system based on photovoltaic heat, including a chiller and a photovoltaic module, the chiller including a first heat exchanger, a second heat exchanger, a third heat exchanger, a fourth heat exchanger and a fifth heat exchanger, the photovoltaic module including a plurality of photovoltaic power generation modules, the first heat exchanger, the second heat exchanger, the third heat exchanger and the fourth heat exchanger are arranged in sequence from left to right, the upper and lower sides of the first heat exchanger are correspondingly provided with a first sprayer and a first collecting tank, the two ports of the first heat exchanger are correspondingly connected to the two ports of the fourth heat exchanger to form a first heat exchange circulation loop, the upper and lower sides of the second heat exchanger are correspondingly provided with a second sprayer The second shower and the second collecting tank are respectively connected to the high-temperature cold water source to form a shower circulation loop, the two ports of the third heat exchanger are respectively connected to the user-side terminals to form a cold water circulation loop, the upper and lower sides of the fifth heat exchanger are correspondingly provided with a third shower and a third collecting tank, the third shower and the third collecting tank are correspondingly connected to the first collecting tank and the first shower to form a salt solution regeneration circulation loop; the photovoltaic power generation module includes a frame and a photovoltaic panel installed in the frame, a radiator is provided on the lower side of the photovoltaic panel, and the two ports of all the radiators in the photovoltaic module are connected in parallel to the two ports of the fifth heat exchanger to form a second heat exchange circulation loop.

[0005] Furthermore, the present invention provides a hot and cold water system based on photovoltaic heat, which also includes a ground source heat pump unit and an underground heat exchanger. The two ports on the primary side of the ground source heat pump unit, the two ports of the underground heat exchanger and the two ports of all radiators in the photovoltaic module connected in parallel are connected in sequence to form a third heat exchange circulation loop, and the two ports on the secondary side of the ground source heat pump unit are respectively connected to the user-side terminals to form a hot water circulation loop.

[0006] Furthermore, the present invention provides a hot and cold water system based on photovoltaic heat, wherein the two branches of the third heat exchange circulation loop are connected to the two branches of the second heat exchange circulation loop through three-way control valves, and the two branches of the hot water circulation loop are connected to the two branches of the cold water circulation loop through three-way control valves; a solution storage tank is provided in the salt solution regeneration circulation loop, a hot water storage tank is provided in the second heat exchange circulation loop, and a plate heat exchanger is provided between the two branches of the second heat exchange circulation loop.

[0007] Furthermore, the present invention provides a hot and cold water system based on photovoltaic heat, wherein the radiator comprises a capillary network bonded to the lower side of the photovoltaic panel by adhesive, connecting pipes are respectively provided at the left and right ends of the capillary network, and pipe joints are provided on the connecting pipes.

[0008] Furthermore, the present invention provides a hot and cold water system based on photovoltaic heat, wherein the frame includes a frame, the upper sides of the four sides of the frame are respectively provided with upper edges extending inwards, the lower sides of the front and rear sides of the frame are respectively provided with lower edges extending inwards, and the inner sides of the left and right sides of the frame are respectively provided with limit clamps; the photovoltaic panel is mounted between the limit clamps of the frame, and the upper side surfaces of the photovoltaic panel are respectively fitted with the corresponding upper edges; the connecting pipes at both ends of the capillary network are located at the lower sides of the corresponding limit clamps; the photovoltaic power generation module also includes a plurality of pressure rods spaced apart along the left and right directions, the leftmost and rightmost pressure rods are respectively pressed on the corresponding connecting pipes and their two ends are respectively connected to the corresponding lower edges through connecting plates, and the middle pressure rod is pressed on the capillary network and its two ends are respectively connected to the corresponding lower edges through connecting plates.

[0009] Furthermore, the present invention provides a hot and cold water system based on photovoltaic heat, wherein the lower side of the radiator is filled with a thermal insulation layer made of mineral fibers between adjacent pressure rods; and a covering layer for UV protection is provided on the lower side of the thermal insulation layer.

[0010] Furthermore, the present invention provides a hot and cold water system based on photovoltaic heat, wherein the first heat exchanger, the third heat exchanger, the fourth heat exchanger and the fifth heat exchanger are internally cooled plastic heat exchangers, and the second heat exchanger is a packed plastic heat exchanger.

[0011] Furthermore, the present invention provides a hot and cold water system based on photovoltaic heat, wherein the internally cooled plastic heat exchanger is composed of a plurality of heat exchange modules interconnected, the heat exchange modules include a plurality of heat exchange tubes, one ends of the plurality of heat exchange tubes are interconnected through a main pipe, the other ends of the plurality of heat exchange tubes are interconnected through another main pipe, the main pipe is a square tube structure, two first interfaces are respectively provided on the front and rear side walls of the main pipe, and second interfaces are respectively provided on the upper and lower ends of the main pipe; the heat exchange modules in the internally cooled plastic heat exchanger are connected by hot-melt sealing through the first interface or the second interface.

[0012] Furthermore, the present invention provides a hot and cold water system based on photovoltaic heat, wherein the multiple heat exchange tubes in the heat exchange module are divided into multiple layers spaced apart along the front-to-back direction, each layer includes multiple heat exchange tubes evenly distributed along the up-down direction, and the heat exchange tubes of adjacent layers are staggered in the up-down direction.

[0013] Furthermore, the present invention provides a hot and cold water system based on photovoltaic heat, wherein the geothermal heat pump unit includes a compressor, an evaporator, a throttle valve and a condenser, the secondary side of the evaporator serves as the primary side of the geothermal heat pump unit, the secondary side of the condenser serves as the secondary side of the geothermal heat pump unit, and the compressor, the primary side of the evaporator, the throttle valve and the primary side of the condenser are connected to form a heat pump circulation loop.

[0014] Compared with the prior art, the photovoltaic-heat-based hot and cold water system of the present invention has the following advantages: the present invention arranges a water chiller and a photovoltaic module, so that the water chiller includes a first heat exchanger, a second heat exchanger, a third heat exchanger, a fourth heat exchanger and a fifth heat exchanger, and the photovoltaic module is provided with a plurality of photovoltaic power generation modules, so that the first heat exchanger, the second heat exchanger, the third heat exchanger and the fourth heat exchanger are arranged in sequence from left to right, and a first sprayer and a first liquid collecting tank are correspondingly arranged on the upper and lower sides of the first heat exchanger, so that the two ports of the first heat exchanger are correspondingly connected to the two ports of the fourth heat exchanger to form a first heat exchange circulation loop, and a second sprayer is correspondingly arranged on the upper and lower sides of the second heat exchanger and the second collecting tank, the second sprayer and the second collecting tank are respectively connected to the high-temperature cold water source to form a spray circulation loop, the two ports of the third heat exchanger are respectively connected to the user-side terminal to form a cold water circulation loop, the third sprayer and the third collecting tank are correspondingly arranged on the upper and lower sides of the fifth heat exchanger, the third sprayer and the third collecting tank are correspondingly connected to the first collecting tank and the first sprayer to form a salt solution regeneration circulation loop, the photovoltaic power generation module is provided with a frame and a photovoltaic panel installed in the frame, a radiator is arranged on the lower side of the photovoltaic panel, and the two ports of all the radiators in the photovoltaic module are connected in parallel to the two ports of the fifth heat exchanger to form a second heat exchange circulation loop. Thus, a photovoltaic heat-based hot and cold water system with a simple structure, stable performance, safety and reliability, and high energy efficiency ratio is formed. The present invention provides a chiller and a photovoltaic module. The chiller can be used to prepare cold water for supply to the user-side terminal, and the photovoltaic module can be used to realize solar power generation. The heat generated by the photovoltaic power generation module drives the salt solution regeneration of the chiller. On the one hand, the photovoltaic panel can be kept at a relatively low temperature, which solves the problem of the decrease in power generation due to the increase in temperature of the photovoltaic panel and improves the power generation efficiency. On the other hand, the chiller does not need to be provided with an additional salt solution regeneration heat source, which avoids energy waste. During the operation of the entire system, only the driving pump of each circulation loop consumes a small amount of electrical energy, which has a high energy efficiency ratio. The consumed electrical energy can be provided by the photovoltaic module, which completely avoids the use of primary energy and puts an end to environmental pollution. The specific process is as follows: when the air flows through the first heat exchanger, the second heat exchanger, the third heat exchanger and the fourth heat exchanger in sequence, the high-concentration salt solution sprayed at the first heat exchanger will first dehumidify the air, and the high-concentration salt solution absorbs moisture in the air to become a low-concentration salt solution, and the air becomes dry air; then the high-temperature cold water sprayed at the second heat exchanger will cool the air, and the high-temperature cold water will contact the dry air to evaporate and absorb heat, and the temperature of the air will decrease and become low-temperature air; then the low-temperature air passes through the third heat exchanger and exchanges heat with the water therein to reduce the temperature of the water and achieve the purpose of preparing cold water. The prepared cold water is supplied to the user-side terminal through the cold water circulation loop; then the air passes through the fourth heat exchanger and exchanges heat with the water therein and is discharged.The latent heat of phase change generated by the heat and moisture exchange between the high-concentration salt solution and the air at the first heat exchanger will be transmitted to the fourth heat exchanger through the first heat exchange circulation loop and carried away by the air; the dehumidified low-concentration salt solution will be transported to the third sprayer through the salt solution regeneration circulation loop. During the spraying process, the fifth heat exchanger will provide the heat required for the regeneration of the salt solution. On the one hand, the air flowing through the fifth heat exchanger will absorb the moisture in the low-concentration salt solution to regenerate it into a high-concentration salt solution. On the other hand, the air will absorb the heat of the water in the fifth heat exchanger to lower its temperature. The water with lowered temperature will be transported to the radiator through the second heat exchange circulation loop to cool and dissipate heat for the photovoltaic panels, so that the photovoltaic panels maintain a low temperature, and the cycle will continue.

[0015] The photovoltaic-based hot and cold water system of the present invention will be further described in detail below in conjunction with the specific embodiments shown in the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural diagram of a photovoltaic-based hot and cold water system of the present invention;

[0017] Figure 2 A top view of a photovoltaic power generation module in a photovoltaic-thermal hot and cold water system of the present invention;

[0018] Figure 3 The invention provides a photovoltaic power generation module in a photovoltaic heat-based cold and hot water system. Figure 1 ;

[0019] Figure 4 A bottom view of a photovoltaic power generation module in a photovoltaic-thermal hot and cold water system of the present invention;

[0020] Figure 5 The invention provides a photovoltaic power generation module in a photovoltaic heat-based cold and hot water system. Figure 2 ;

[0021] Figure 6 for Figure 4 A magnified cross-sectional view along the AA axis;

[0022] Figure 7 An exploded diagram of a photovoltaic power generation module in a photovoltaic-based hot and cold water system of the present invention;

[0023] Figure 8 A bottom view of a radiator in a photovoltaic-based hot and cold water system of the present invention;

[0024] Fig. 9 A three-dimensional diagram of a radiator in a hot and cold water system based on photovoltaic heat according to the present invention;

[0025] Fig.10 for Fig. 9 A partial enlarged view of position B in the middle;

[0026] Fig.11 A top view of a frame in a photovoltaic-based hot and cold water system of the present invention;

[0027] Fig.12 A bottom view of a frame in a photovoltaic-based hot and cold water system of the present invention;

[0028] Fig.13 The present invention is a three-dimensional framework of a cold and hot water system based on photovoltaic heat Figure 1 ;

[0029] Fig.14 The present invention is a three-dimensional framework of a cold and hot water system based on photovoltaic heat Figure 2 ;

[0030] Fig.15 for Fig.13 A partial enlarged view of the C position in the middle;

[0031] Fig.16 for Fig.14 A partial enlarged view of the D position in the middle;

[0032] Fig.17 A three-dimensional diagram of an internally cooled plastic heat exchanger in a hot and cold water system based on photovoltaic heat according to the present invention;

[0033] Fig.18 It is a front view of a heat exchange module in a photovoltaic-based hot and cold water system of the present invention;

[0034] Fig.19 A top view of a heat exchange module in a hot and cold water system based on photovoltaic heat according to the present invention;

[0035] Fig. 20 A three-dimensional diagram of a heat exchange module in a hot and cold water system based on photovoltaic heat according to the present invention;

[0036] Fig.21 for Fig. 20 A partial enlarged view of the E position in the middle;

[0037] Fig. 22 for Fig. 20 A partial enlarged view of the F position in the middle. DETAILED DESCRIPTION

[0038] First of all, it should be explained that the directional words such as up, down, left, right, front and back described in the present invention are only described according to the drawings for the convenience of understanding, and are not intended to limit the technical solution of the present invention and the scope of protection requested.

[0039] like Figures 1 to 22The first specific embodiment of a photovoltaic-heat-based hot and cold water system of the present invention is shown, comprising a chiller and a photovoltaic module. The chiller comprises a first heat exchanger 1, a second heat exchanger 2, a third heat exchanger 3, a fourth heat exchanger 4 and a fifth heat exchanger 5; the photovoltaic module is provided with a plurality of photovoltaic power generation modules 6. The first heat exchanger 1, the second heat exchanger 2, the third heat exchanger 3 and the fourth heat exchanger 4 are arranged in sequence from left to right. The first sprayer 11 and the first collecting tank 12 are correspondingly arranged on the upper and lower sides of the first heat exchanger 1, and the two ports of the first heat exchanger 1 are correspondingly connected to the two ports of the fourth heat exchanger 4 to form a first heat exchange circulation loop. The second sprayer 21 and the second collecting tank 22 are correspondingly arranged on the upper and lower sides of the second heat exchanger 2, and the second sprayer 21 and the second collecting tank 22 are respectively connected to the high-temperature cold water source 23 to form a spray circulation loop. The two ports of the third heat exchanger 3 are respectively connected to the user-side terminal 31 to form a cold water circulation loop. A third sprayer 51 and a third liquid collecting tank 52 are correspondingly arranged on the upper and lower sides of the fifth heat exchanger 5, and the third sprayer 51 and the third liquid collecting tank 52 are correspondingly connected to the first liquid collecting tank 12 and the first sprayer 11 to form a salt solution regeneration circulation loop. The photovoltaic power generation module 6 is provided with a frame 61 and a photovoltaic panel 62 installed in the frame 61, a radiator 63 is arranged on the lower side of the photovoltaic panel 62, and the two ports of all the radiators 63 in the photovoltaic module connected in parallel are correspondingly connected to the two ports of the fifth heat exchanger 5 to form a second heat exchange circulation loop.

[0040] The above structural setting constitutes a photovoltaic heat-based hot and cold water system with simple structure, stable performance, safety and reliability, and high energy efficiency. The present invention sets a chiller and a photovoltaic module. The chiller can prepare cold water for use at the user side terminal, and the photovoltaic module can realize solar power generation. The heat generated by the photovoltaic power generation module 6 drives the salt solution regeneration of the chiller. On the one hand, the photovoltaic panel 62 can be kept at a relatively low temperature, which solves the problem of the decrease in power generation due to the increase in temperature of the photovoltaic panel 62, and improves the power generation efficiency; on the other hand, the chiller does not need to set up an additional salt solution regeneration heat source, avoiding energy waste. During the operation of the entire system, only the driving pump in each circulation loop consumes a small amount of electricity, which has a high energy efficiency ratio, and the consumed electricity can be provided by the photovoltaic module, which completely avoids the use of primary energy and eliminates environmental pollution. The specific process is as follows: when the air flows through the first heat exchanger 1, the second heat exchanger 2, the third heat exchanger 3 and the fourth heat exchanger 4 in sequence, the high-concentration salt solution sprayed at the first heat exchanger 1 will first dehumidify the air, and the high-concentration salt solution absorbs moisture in the air to become a low-concentration salt solution, and the air becomes dry air; then the high-temperature cold water sprayed at the second heat exchanger 2 will cool the air, and the high-temperature cold water will evaporate and absorb heat in contact with the dry air, and the temperature of the air will decrease and become low-temperature air; then the low-temperature air passes through the third heat exchanger 3 and exchanges heat with the water therein, so that the temperature of the water is reduced to achieve the purpose of preparing cold water, and the prepared cold water is supplied to the user-side terminal 31 through the cold water circulation loop; then the air passes through the fourth heat exchanger 4 and exchanges heat with the water therein and is discharged. The latent heat of phase change generated by the heat and moisture exchange between the high-concentration salt solution and the air at the first heat exchanger 1 will be transmitted to the fourth heat exchanger 4 through the first heat exchange circulation loop and carried away by the air; the dehumidified low-concentration salt solution will be transported to the third sprayer 51 through the salt solution regeneration circulation loop. During the spraying process, the fifth heat exchanger 5 provides the heat required for the regeneration of the salt solution. On the one hand, the air flowing through the fifth heat exchanger 5 will absorb the moisture in the low-concentration salt solution to regenerate it into a high-concentration salt solution. On the other hand, the air will absorb the heat of the water in the fifth heat exchanger 5 to reduce its temperature. The water with reduced temperature will be transported to the radiator 63 through the second heat exchange circulation loop to cool and dissipate the heat of the photovoltaic panel 62, so that the photovoltaic panel 62 maintains a low temperature, and the cycle runs in this way. It should be noted that, in actual applications, the first heat exchange circulation loop, the spray circulation loop, the cold water circulation loop, the salt solution regeneration circulation loop and the second heat exchange circulation loop are all provided with a driving pump to provide a circulation driving force; in the chiller, the passage through which the air flows through the first heat exchanger 1, the second heat exchanger 2, the third heat exchanger 3 and the fourth heat exchanger 4 in sequence is provided with a first air duct, and the passage through which the air flows through the fifth heat exchanger 5 is provided with a second air duct, so that the air can exchange heat with each heat exchanger; the high-temperature cold water refers to tap water, river water, lake water or sea water, etc.

[0041] As an optimization solution, this specific implementation further provides a ground source heat pump unit 7 and an underground heat exchanger 8, and the two ports on the primary side of the ground source heat pump unit 7, the two ports on the underground heat exchanger 8 and the two ports of all the radiators 63 in the photovoltaic module connected in parallel are connected in sequence to form a third heat exchange circulation loop, and the two ports on the secondary side of the ground source heat pump unit 7 are respectively connected to the user side terminal 31 to form a hot water circulation loop. This structural setting enhances the functionality and practicality of the hot and cold water system. In summer cooling conditions, the chiller is started and the ground source heat pump is shut down. During system operation, the heat generated by the photovoltaic power generation module 6 is used to drive the salt solution regeneration of the chiller. On the one hand, the photovoltaic panel 62 is kept at a relatively low temperature, solving the problem of the decrease in power generation due to the increase in temperature of the photovoltaic panel 62, thereby improving the power generation efficiency. On the other hand, the chiller does not need to be equipped with an additional salt solution regeneration heat source, thereby avoiding energy waste. When the heat generated by the photovoltaic power generation module 6 is in excess, the third heat exchange circulation loop is operated, and the heat generated by the photovoltaic power generation module 6 is stored in the underground heat exchanger 8 to regenerate the soil, which can effectively avoid or slow down the problem of the ground source heat pump system's work efficiency decreasing with the increase in service life. In winter heating conditions, the chiller is turned off and the ground source heat pump unit is started. On the one hand, the heat generated by the photovoltaic power generation module 6 is transported to the underground heat exchanger 8 through the third heat exchange circulation loop, so that the photovoltaic panel 62 maintains a low temperature and improves the power generation efficiency. On the other hand, the heat in the underground heat exchanger 8 is transmitted to the hot water circulation loop through the third heat exchange circulation loop and the ground source heat pump unit 7, and is used by the user side terminal 31 through the hot water circulation loop; the heat generated by the photovoltaic power generation module 6 is transported to the underground heat exchanger 8 through the third heat exchange circulation loop, which reduces the heat taken out of the soil by the ground source heat pump system and improves the annual working coefficient of the ground source heat pump system. It should be pointed out that the ground source heat pump system refers to a system composed of the ground source heat pump unit 7, the underground heat exchanger 8, the third heat exchange circulation loop and the hot water circulation loop. In practical applications, the ground source heat pump unit 7 is composed of a compressor, an evaporator, a throttle valve and a condenser, wherein the secondary side of the evaporator serves as the primary side of the ground source heat pump unit 7, and the secondary side of the condenser serves as the secondary side of the ground source heat pump unit 7. The compressor, the primary side of the evaporator, the throttle valve and the primary side of the condenser are connected to form a heat pump circulation loop. As a specific embodiment, the present invention connects the two branches of the third heat exchange circulation loop to the two branches of the second heat exchange circulation loop through a three-way control valve, and connects the two branches of the hot water circulation loop to the two branches of the cold water circulation loop through a three-way control valve, so as to simplify the pipeline and facilitate control. In order to enhance the stability and adaptability of the system, the present specific embodiment provides a solution storage tank 13 in the salt solution regeneration circulation loop, a hot water storage tank 53 in the second heat exchange circulation loop, and a plate heat exchanger 54 between the two branches of the second heat exchange circulation loop.

[0042] As an optimization scheme, the present embodiment makes the radiator 63 adopt the following structure and connection method: including a capillary network 631 bonded to the lower side of the photovoltaic panel 62 by an adhesive 64, connecting pipes 632 are respectively arranged at the left and right ends of the capillary network 631, and a pipe joint 633 is arranged on the connecting pipe 632. The radiator 63 of this structure has the advantages of simple structure, low cost, small space occupation, and high heat exchange efficiency, which can improve the compactness of the structure and the heat dissipation effect of the photovoltaic power generation module 6. At the same time, the present embodiment makes the frame 61 adopt the following structure: a frame 611 is provided, and upper edges 612 extending inwards are respectively provided on the upper sides of the four sides of the frame 611, and lower edges 613 extending inwards are respectively provided on the lower sides of the front and rear sides of the frame 611, and limit clamps 614 are respectively provided on the inner sides of the left and right sides of the frame 611. When assembling the photovoltaic power generation module 6, the photovoltaic panel 62 is clamped between the limit clamping platforms 614 of the frame 61, so that the upper side of the photovoltaic panel 62 is respectively fitted with the corresponding upper edge 612, and the connecting pipes 632 at both ends of the capillary network 631 are located at the lower side of the corresponding limit clamping platform 614. A plurality of pressure rods 65 are arranged at intervals along the left and right directions, so that the pressure rods 65 on the left and right sides are respectively pressed on the corresponding connecting pipes 632 and their two ends are respectively connected to the corresponding lower edge 613 through the connecting plates 651, and the middle pressure rod 65 is pressed on the capillary network 631 and its two ends are respectively connected to the corresponding lower edge 613 through the connecting plates 651. The frame 61 and the photovoltaic power generation module 6 set in this way have the characteristics of simple structure and convenient assembly and disassembly. On the basis of ensuring that the capillary network 631 and the photovoltaic panel 62 are fully fitted, the stability of the structure is enhanced by the pressure rods 65. It should be noted that in actual application, a threaded column 615 is provided on the lower edge 613 of the frame 61 to cooperate with the connecting plate 651 so as to install and fix the pressure rod 65; the pressure rods 65 on the far left and the far right are respectively provided with notches so that the pipe joint 633 can extend from the notches. In addition, the present specific embodiment also fills the lower side of the radiator 63 and the position between the adjacent pressure rods 65 with a thermal insulation layer 66 made of mineral fiber. The thermal insulation layer 66 can keep the heat dissipation effect of the capillary network 631 relatively stable to avoid being affected by the external ambient temperature, especially in winter when the temperature is low, to prevent the circulating water in the capillary network 631 from freezing and affecting the heat dissipation function. A covering layer 67 for anti-ultraviolet rays is provided on the lower side of the thermal insulation layer 66 to prevent the thermal insulation layer 66 from being affected by ultraviolet rays and weathering and affecting its life.

[0043] As a specific embodiment, the present invention reduces material cost, improves heat exchange efficiency, enhances corrosion resistance and prolongs service life by making the first heat exchanger 1, the third heat exchanger 3, the fourth heat exchanger 4 and the fifth heat exchanger 5 adopt internal cooling plastic heat exchangers; and the second heat exchanger 2 adopts a packing plastic heat exchanger, and the spray evaporation effect is enhanced by an adiabatic heat exchange method. Specifically, the internal cooling plastic heat exchanger is composed of a plurality of heat exchange modules 9 connected to each other, wherein the heat exchange module 9 includes a plurality of heat exchange tubes 91, one end of the plurality of heat exchange tubes 91 is connected to each other through a main tube 92, and the other end of the plurality of heat exchange tubes 91 is connected to each other through another main tube 92, and the main tube 92 adopts a square tube structure, and two first interfaces 93 are respectively provided on the front and rear side walls of the main tube 92, and second interfaces 94 are respectively provided at the upper and lower ends of the main tube 92. When a plurality of heat exchange modules 9 are combined into an internal cooling plastic heat exchanger, the heat exchange modules 9 are connected by hot melt sealing through the first interface 93 or the second interface 94. For the internally cooled plastic heat exchanger, in addition to reserving two first interfaces 93 or second interfaces 94 as input ports and output ports, the remaining first interfaces 93 and second interfaces 94 should be sealed by hot-melt sealing with corresponding first sealing disks 95 and second sealing disks 96 made of plastic. The internally cooled plastic heat exchanger with this structure has the advantages of simple structure, convenient assembly and good scalability. Different numbers of heat exchange modules can be selected for combination according to the heat exchange amount. When a heat exchange tube breaks or leaks, it only needs to be sealed by hot-melt and can continue to be used, avoiding the problem of waste caused by replacing the heat exchanger as a whole. It should be noted that the attached Fig.17 The internally cooled plastic heat exchanger shown is composed of eight heat exchange modules 9, but is not limited thereto in practical applications. Furthermore, in this specific embodiment, the multiple heat exchange tubes 91 in the heat exchange module 9 are divided into multiple layers spaced apart in the front-to-back direction, each layer includes multiple heat exchange tubes 91 evenly distributed in the up-down direction, and the heat exchange tubes 91 in adjacent layers are staggered in the up-down direction. This structural setting can effectively enhance convective heat exchange and improve heat exchange efficiency.

[0044] The above embodiments are only descriptions of the preferred implementation modes of the present invention, and are not intended to limit the protection scope of the present invention. Without departing from the design concept of the present invention, various modifications made by those skilled in the art based on the technical solution of the present invention should fall within the protection scope determined by the claims of the present invention.

Claims

1. A photovoltaic-based hot and cold water system, comprising a water chiller and a photovoltaic module, wherein the water chiller comprises a first heat exchanger (1), a second heat exchanger (2), a third heat exchanger (3), a fourth heat exchanger (4) and a fifth heat exchanger (5), and the photovoltaic module comprises a plurality of photovoltaic power generation modules (6), characterized in that: The first heat exchanger (1), the second heat exchanger (2), the third heat exchanger (3) and the fourth heat exchanger (4) are arranged in sequence from left to right. The upper and lower sides of the first heat exchanger (1) are provided with a first sprayer (11) and a first liquid collecting tank (12) respectively. The two ports of the first heat exchanger (1) are connected to the two ports of the fourth heat exchanger (4) to form a first heat exchange circulation loop. The upper and lower sides of the second heat exchanger (2) are provided with a second sprayer (21) and a second liquid collecting tank (22) respectively. The second sprayer (21) and the second liquid collecting tank (22) are respectively connected to a high-temperature cold water source (23) to form a spray circulation loop. The two ports of the third heat exchanger (3) are respectively connected to a user side The ends (31) are connected to form a cold water circulation loop; the upper and lower sides of the fifth heat exchanger (5) are correspondingly provided with a third sprayer (51) and a third liquid collecting tank (52); the third sprayer (51) and the third liquid collecting tank (52) are correspondingly connected to the first liquid collecting tank (12) and the first sprayer (11) to form a salt solution regeneration circulation loop; the photovoltaic power generation module (6) comprises a frame (61) and a photovoltaic panel (62) installed in the frame (61); a radiator (63) is provided on the lower side of the photovoltaic panel (62); the two ports of all the radiators (63) in the photovoltaic module connected in parallel are correspondingly connected to the two ports of the fifth heat exchanger (5) to form a second heat exchange circulation loop; It also includes a ground source heat pump unit (7) and an underground heat exchanger (8); two ports on the primary side of the ground source heat pump unit (7), two ports on the underground heat exchanger (8) and two ports of all radiators (63) in the photovoltaic module connected in parallel are connected in sequence to form a third heat exchange circulation loop; two ports on the secondary side of the ground source heat pump unit (7) are respectively connected to the user-side terminal (31) to form a hot water circulation loop; two branches of the third heat exchange circulation loop are respectively connected to the two branches of the second heat exchange circulation loop via a three-way control valve, and two branches of the hot water circulation loop are respectively connected to the two branches of the cold water circulation loop via a three-way control valve; a solution storage tank (13) is provided in the salt solution regeneration circulation loop, a hot water storage tank (53) is provided in the second heat exchange circulation loop, and a plate heat exchanger (54) is provided between the two branches of the second heat exchange circulation loop; The frame (61) comprises a frame (611); the upper sides of the four sides of the frame (611) are respectively provided with upper edges (612) extending inwards; the lower sides of the front and rear sides of the frame (611) are respectively provided with lower edges (613) extending inwards; and the inner sides of the left and right sides of the frame (611) are respectively provided with limit clamping platforms (614); the photovoltaic panel (62) is clamped between the limit clamping platforms (614) of the frame (61), and the upper side surfaces of the photovoltaic panel (62) are respectively in contact with the corresponding upper edges (612); the connecting pipes (632) at both ends of the capillary network (631) are located at the lower sides of the corresponding limit clamping platforms (614); photovoltaic power generation The module (6) further comprises a plurality of pressure rods (65) spaced apart in the left-right direction, the leftmost and rightmost pressure rods (65) respectively pressing on the corresponding connecting tubes (632) and having their two ends respectively connected to the corresponding lower edges (613) via connecting plates (651), and the middle pressure rod (65) pressing on the capillary network (631) and having its two ends respectively connected to the corresponding lower edges (613) via connecting plates (651); the first heat exchanger (1), the third heat exchanger (3), the fourth heat exchanger (4) and the fifth heat exchanger (5) are internally cooled plastic heat exchangers, and the second heat exchanger (2) is a filler plastic heat exchanger.

2. A photovoltaic-based hot and cold water system according to claim 1, characterized in that: The heat sink (63) comprises a capillary network (631) bonded to the lower side of the photovoltaic panel (62) by means of an adhesive (64); connecting pipes (632) are respectively provided at the left and right ends of the capillary network (631); and a pipe joint (633) is provided on the connecting pipe (632).

3. A photovoltaic-based hot and cold water system according to claim 2, characterized in that: The lower side of the radiator (63) is filled with a thermal insulation layer (66) made of mineral fiber between adjacent pressure rods (65); the lower side of the thermal insulation layer (66) is provided with a covering layer (67) for preventing ultraviolet rays.

4. A photovoltaic-based hot and cold water system according to claim 1, characterized in that: The internally cooled plastic heat exchanger is composed of a plurality of interconnected heat exchange modules (9), wherein the heat exchange modules (9) include a plurality of heat exchange tubes (91), one end of the plurality of heat exchange tubes (91) are interconnected via a main tube (92), and the other end of the plurality of heat exchange tubes (91) are interconnected via another main tube (92), the main tube (92) being a square tube structure, two first interfaces (93) being respectively provided on the front and rear side walls of the main tube (92), and second interfaces (94) being respectively provided on the upper and lower ends of the main tube (92); the heat exchange modules (9) in the internally cooled plastic heat exchanger are connected to each other by hot-melt sealing via the first interfaces (93) or the second interfaces (94).

5. A photovoltaic-based hot and cold water system according to claim 4, characterized in that: The plurality of heat exchange tubes (91) in the heat exchange module (9) are divided into multiple layers spaced apart in the front-to-rear direction, each layer comprising a plurality of heat exchange tubes (91) evenly distributed in the up-down direction, and the heat exchange tubes (91) in adjacent layers are staggered in the up-down direction.

6. A photovoltaic-based hot and cold water system according to claim 1, characterized in that: The ground source heat pump unit (7) comprises a compressor, an evaporator, a throttle valve and a condenser, the secondary side of the evaporator serves as the primary side of the ground source heat pump unit (7), the secondary side of the condenser serves as the secondary side of the ground source heat pump unit (7), and the compressor, the primary side of the evaporator, the throttle valve and the primary side of the condenser are connected to form a heat pump circulation loop.

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