CN110762867B

CN110762867B - Solar energy capillary temperature gradient case

Info

Publication number: CN110762867B
Application number: CN201911021054.5A
Authority: CN
Inventors: 江红阳; 张凤娟; 苏州
Original assignee: Huachun New Energy Co Ltd
Current assignee: Huachun New Energy Co ltd
Priority date: 2019-10-25
Filing date: 2019-10-25
Publication date: 2020-10-27
Anticipated expiration: 2039-10-25
Also published as: CN110762867A

Abstract

The invention discloses a solar capillary temperature gradient box, and relates to the technical field of solar heat collection. The solar water heater comprises a solar heat collector, a temperature control water tank, a low-temperature water tank, a test box and a controller, wherein a heating coil and a cooling coil are arranged in the temperature control water tank. The test box comprises a heat-insulating barrel body and an upper cover, wherein a circular wall type capillary heat exchanger and a metal inner barrel are coaxially arranged in the heat-insulating barrel body from outside to inside in sequence, the circular wall type capillary heat exchanger comprises an upper circular pipe, a lower circular pipe and a capillary pipe used for communicating the upper circular pipe and the lower circular pipe, and a water outlet pipe and a water inlet pipe are respectively arranged on the upper circular pipe and the lower circular pipe. The solar heat collector is connected with the heating coil pipe to form a first circulation loop; the low-temperature water tank and the cooling coil form a fourth circulation loop, and the temperature control water tank is connected with the annular wall type capillary heat exchanger to form a third circulation loop. Through utilizing the heat transfer of rampart formula capillary heat exchanger, have the heat transfer area big, the characteristics that the heat transfer difference in temperature is little can realize quick temperature change and evenly distributed in the case.

Description

Solar energy capillary temperature gradient case

Technical Field

The invention relates to the technical field of solar heat collection, in particular to a solar capillary temperature gradient box.

Background

The temperature gradient box is an ideal device for scientific research and production in the fields of biology, food engineering, medical research, agriculture and forestry science, aquatic products, animal husbandry and the like. In order to simulate the actual environmental conditions of the product in nature more correctly, the tested product must be ensured to be in the same temperature environment condition in the environmental test, and for this reason, the temperature gradient and the fluctuation degree of the temperature in the test chamber must be limited.

The temperature stability and uniformity inside the test chamber are important indexes for measuring the performance of the temperature gradient chamber, and the rapid conversion of different temperature gradients according to requirements is also one of the performance indexes. For environmental test equipment manufacturers, products capable of achieving both high temperature change rate and good temperature field uniformity are being researched to meet the requirements of users.

At present, most of the existing temperature gradient boxes take refrigeration or electric heating equipment as cold and heat sources, and airflow is uniformly distributed in the boxes through fans, so that the effects of uniform temperature and rapid temperature change are achieved. However, on the premise of pursuing high temperature change rate, increasing the wind speed can destroy the uniformity of the temperature inside the box body, especially the temperature difference between the windward side and the leeward side, and on some specific incubator experiment processes, the value of the wind speed in the box can influence the experiment result.

Disclosure of Invention

In order to solve the problems, the invention provides the solar capillary temperature gradient box, which has the characteristics of large heat exchange area and small heat exchange temperature difference by utilizing the annular wall type capillary heat exchanger for heat exchange, can realize quick temperature change and uniform distribution in the box, and can realize the requirement of a temperature change area in the temperature gradient box by switching a control mode.

The technical scheme adopted by the invention for solving the technical problems is as follows:

a solar capillary temperature gradient box comprises a solar heat collector, a temperature control water tank, a low-temperature water tank, a test box and a controller;

a temperature-rising coil and a temperature-reducing coil are arranged in the temperature-control water tank;

the test box comprises a heat-insulating barrel body and an upper cover, wherein a circular wall type capillary heat exchanger and a metal inner barrel are coaxially arranged in the heat-insulating barrel body from outside to inside in sequence, the circular wall type capillary heat exchanger comprises an upper circular pipe, a lower circular pipe and a capillary pipe used for communicating the upper circular pipe and the lower circular pipe, the capillary pipes are uniformly arranged along the circumferential direction, a water outlet pipe is arranged on the upper circular pipe, and a water inlet pipe is arranged on the lower circular pipe;

the test chamber and the temperature control water tank are respectively provided with a thermometer;

the solar heat collector is connected with the heating coil through a first pipeline and a second pipeline to form a first circulation loop, and a first valve and a first circulation pump are arranged on the first circulation loop;

the low-temperature water tank is connected with the cooling coil through a seventh pipeline and an eighth pipeline to form a fourth circulation loop, and a seventh valve and a third circulation pump are arranged on the fourth circulation loop;

the temperature control water tank is connected with the annular wall type capillary heat exchanger through a fifth pipeline and a sixth pipeline, a third circulation loop is formed, and a fifth valve and a second circulation pump are arranged on the third circulation loop.

Furthermore, the solar heat collector is connected with the annular wall type capillary heat exchanger through a third pipeline and a fourth pipeline to form a second circulation loop, a third valve and a fourth valve are respectively arranged on the third pipeline and the fourth pipeline, and the third valve and the fourth valve can only control the on-off of the second circulation loop;

the first valve is arranged on the first pipeline, the second pipeline is provided with a second valve, the first valve and the second valve can only control the on-off of the first circulation loop, and the first circulation pump can only provide power for the first circulation loop;

the fifth valve is arranged on a fifth pipeline, a sixth valve is arranged on a sixth pipeline, and the fifth valve and the sixth valve can only control the on-off of the third circulation loop;

the second circulation pump is disposed on a common portion of the second circulation circuit and the third circulation circuit.

Further, the heat-preserving container body in the fixed baffle that is formed by the insulation material preparation that is provided with, rampart formula capillary heat exchanger and metal inner tube all set up in the top of baffle, the fixed fan that is provided with on the bottom surface of heat-preserving container body, the baffle on lie in the annular region equipartition between heat-preserving container body and the metal inner tube is provided with the inlet port, be provided with the exhaust hole on the lateral wall of heat-preserving container body, the outside cover of heat-preserving container body is equipped with and is used for the shutoff the sealing ring in exhaust hole.

Furthermore, a supporting plate is arranged on the outer side wall of the heat-insulating barrel body and below the sealing ring.

Furthermore, the partition plate and the upper cover are respectively provided with a first annular limiting plate and a second annular limiting plate, the lower end of the metal inner cylinder is inserted into the first limiting plate, and the upper end of the metal inner cylinder is inserted into the second limiting plate.

Furthermore, the capillary tube, the upper ring tube and the lower ring tube are all made of plastic materials, a metal sleeve is sleeved outside the capillary tube, and fins which are radially arranged are arranged outside the metal sleeve.

Furthermore, the upper ring pipe and the lower ring pipe are respectively fixedly connected with the inner metal cylinder through fixing components, each fixing component comprises a U-shaped bolt and a push plate which is arranged on the U-shaped bolt in a sliding mode, the open end of the U-shaped bolt is fixedly connected with the inner metal cylinder, the upper ring pipe and the lower ring pipe are limited in a closed area formed by the U-shaped bolt and the push plate, and a tightening bolt used for tightening the push plate is arranged on the inner metal cylinder.

Furthermore, a first cushion pad is arranged on the inner side of the bending part of the U-shaped bolt, and a second cushion pad is fixedly arranged on the push plate.

Further, an arc-shaped groove is formed in the second buffer cushion.

Further, the inner diameter of the capillary tube is 2-5 mm.

The invention has the beneficial effects that:

1. utilize rampart formula capillary heat exchanger, realize little difference in temperature, large tracts of land radiation heat dissipation, the intensive even distribution of radiator is around the staving, not only can guarantee the homogeneity of temperature in the test box, can realize quick intensification and cooling moreover, improves the alternating temperature rate.

2. The thermosiphon effect of make full use of solar energy collection in-process and the capillary phenomenon on the solid surface of flowing in the capillary can realize zero energy consumption operation under partial operating mode, even need the auxiliary operation of water pump under partial operating mode, also can significantly reduce the power of water pump, energy-concerving and environment-protective.

3. Different heat supply modes are switched through the controller, so that different temperature requirements are met, the temperature regulation interval is expanded, and the temperature requirements of different fields such as medicine, health and food can be met.

4. The test box is convenient to mount and dismount, and later maintenance is facilitated.

5. The invention provides possibility for some outdoor temperature gradient tests, firstly, renewable energy solar energy is used as a heat source, and secondly, the solar photovoltaic panel can be adopted to realize electric drive due to the small power required by the equipment.

Drawings

FIG. 1 is a schematic diagram of the cycle principle of a temperature gradient box;

FIG. 2 is a schematic perspective view of the test chamber;

FIG. 3 is a front view of the test chamber;

FIG. 4 is a sectional view A-A of FIG. 3;

FIG. 5 is an enlarged view of portion A of FIG. 4;

FIG. 6 is an enlarged schematic view of portion B of FIG. 4;

FIG. 7 is an exploded view of FIG. 2;

FIG. 8 is an enlarged view of the portion C of FIG. 7;

FIG. 9 is a schematic perspective view of a circular wall capillary heat exchanger;

FIG. 10 is a perspective view of the upper cover;

FIG. 11 is a schematic view of the fixing assembly;

FIG. 12 is a schematic perspective view of a U-bolt;

FIG. 13 is an enlarged view of portion D of FIG. 12;

FIG. 14 is a schematic perspective view of a pusher;

FIG. 15 is a perspective view of a first cushion;

FIG. 16 is a cross-sectional view of a capillary tube;

fig. 17 is a schematic structural view of an upper grommet in the second embodiment.

In the figure: 1-a solar heat collector, 2-a temperature control water tank, 21-a temperature rise coil, 22-a temperature reduction coil, 3-a low temperature water tank, 4-a test box, 41-a heat preservation barrel body, 411-an exhaust hole, 412-a supporting plate, 42-an upper cover, 421-a second limiting plate, 422-a controller, 43-a metal inner barrel, 44-a circular wall type capillary tube heat exchanger, 441-an upper circular tube, 442-a lower circular tube, 443-a capillary tube, 444-a metal sleeve, 4441-a fin, 45-a fixing component, 451-U-shaped bolt, 4511-a mounting groove, 452-a first cushion, 453-a push plate, 4531-a guide hole, 454-a second cushion, 455-a puller bolt, 46-a fan, 47-a sealing strip and 48-a clapboard, 481-first limiting plate, 482-air inlet, 51-first valve, 52-second valve, 53-third valve, 54-fourth valve, 55-fifth valve, 56-sixth valve, 57-seventh valve, 61-first circulating pump, 62-second circulating pump and 63-third circulating pump.

Detailed Description

Example one

As shown in fig. 1, a solar capillary 443 temperature gradient box includes a solar thermal collector 1, a temperature-controlled water tank 2, a low-temperature water tank 3, a test chamber 4, and a controller 422.

As shown in fig. 1, temperature-controlled water tank 2 include the box, be provided with heating coil 21 and cooling coil 22 in temperature-controlled water tank 2's the box respectively, just heating coil 21 and cooling coil 22's water inlet and delivery port all be located temperature-controlled water tank 2's outside.

As shown in fig. 2, the test chamber 4 includes a heat insulation barrel 41, an upper cover 42 for closing the heat insulation barrel 41 is disposed at an upper end of the heat insulation barrel 41, and the upper cover 42 is made of a heat insulation material. As a specific implementation manner, in this embodiment, the heat insulation barrel 41 and the upper cover 42 are both made of polyurethane plates, the polyurethane plates are formed by filling foamed polyurethane between two color steel plates, the upper cover 42 is fixedly connected to the heat insulation barrel 41 through a latch (not shown), and a sealing ring (not shown) is disposed between the heat insulation barrel 41 and the upper cover 42. As shown in fig. 2, 4 and 7, a circular wall type capillary heat exchanger 44 is arranged in the insulating barrel body 41, and the circular wall type capillary heat exchanger 44 is arranged coaxially with the barrel body. A metal inner cylinder 43 is arranged in the annular wall type capillary heat exchanger 44, and the metal inner cylinder 43 and the annular wall type capillary heat exchanger 44 are coaxially arranged. The metal inner cylinder 43 is fixedly connected with the barrel body, and the annular wall type capillary heat exchanger 44 is fixedly connected with the metal inner cylinder 43 through a fixing component 45.

As shown in fig. 9, the annular wall type capillary heat exchanger 44 includes an upper annular pipe 441 and a lower annular pipe 442, and the upper annular pipe 441 and the lower annular pipe 442 have the same diameter and are coaxially arranged. A plurality of capillary tubes 443 for communicating the upper ring pipe 441 and the lower ring pipe 442 are arranged between the upper ring pipe 441 and the lower ring pipe 442, and the plurality of capillary tubes 443 are uniformly arranged along the circumferential direction. The upper ring pipe 441 is provided with a water outlet pipe, the lower ring pipe 442 is provided with a water inlet pipe, and the water outlet pipe and the water inlet pipe both penetrate through the heat-insulating barrel body 41 and extend to the outside of the heat-insulating barrel body 41.

The upper cover 42 of the test chamber 4 and the temperature control water tank 2 are respectively provided with a pressure gauge (not shown) and a temperature gauge (not shown).

Preferably, the controller 422 is a liquid crystal controller 422, and the liquid crystal controller 422 can directly display the temperature value and the pressure value in the test chamber 4 and the temperature control water tank 2 fed back by the pressure gauge and the thermometer. The application of the liquid crystal controller 422 is prior art to those skilled in the art, and will not be described herein in any greater detail. As a specific embodiment, as shown in fig. 2, the controller 422 is fixedly disposed on the upper cover 42.

As shown in fig. 1, a water inlet of the solar thermal collector 1 is connected to a water outlet of the warming coil 21 through a first pipeline, a water outlet of the solar thermal collector 1 is connected to a water inlet of the warming coil 21 through a second pipeline, and the solar thermal collector 1, the warming coil 21, the first pipeline and the second pipeline together form a first circulation loop.

The water inlet of the solar heat collector 1 is connected with the water outlet pipe of the middle annular wall type capillary heat exchanger 44 in the test box 4 through a third pipeline, the water outlet of the solar heat collector 1 is connected with the water inlet pipe of the middle annular wall type capillary heat exchanger 44 in the test box 4 through a fourth pipeline, and the solar heat collector 1, the test box 4, the third pipeline and the fourth pipeline form a second circulation loop together.

The water inlet of the temperature control water tank 2 is connected with the water outlet pipe of the middle annular wall type capillary heat exchanger 44 in the test box 4 through a fifth pipeline, the water outlet of the temperature control water tank 2 is connected with the water inlet pipe of the middle annular wall type capillary heat exchanger 44 in the test box 4 through a sixth pipeline, and the temperature control water tank 2, the test box 4, the fifth pipeline and the sixth pipeline form a third circulation loop together.

The water inlet of low temperature water tank 3 pass through the seventh pipeline with cooling coil 22's delivery port links to each other in the temperature-controlled water tank 2, low temperature water tank 3's delivery port pass through the eighth pipeline with cooling coil 22's water inlet links to each other in the temperature-controlled water tank 2, low temperature water tank 3, cooling coil 22, seventh pipeline and eighth pipeline form the fourth circulation circuit jointly.

As shown in fig. 1, the first pipe and the second pipe are respectively provided with a first valve 51 and a second valve 52, and the first pipe is provided with a first circulation pump 61 for providing power for the first circulation loop. When the first circulation loop and the second circulation loop share a common part, the first valve 51, the second valve 52 and the first circulation pump 61 are all arranged on a non-common part of the first circulation loop, that is, the first valve 51 and the second valve 52 can only control the on-off of the first circulation loop, and the first circulation pump 61 can only provide power for the first circulation loop.

The third pipeline and the fourth pipeline are respectively provided with a third valve 53 and a fourth valve 54, and the third valve 53 and the fourth valve 54 are both arranged on the non-common part of the second circulation loop. Similarly, when the second circulation loop and the third circulation loop share a common part, the third valve 53 and the fourth valve 54 are also arranged on the non-common part of the second circulation loop and the third circulation loop, that is, the third valve 53 and the fourth valve 54 can only control the on-off of the second circulation loop.

The fifth pipeline and the sixth pipeline are respectively provided with a fifth valve 55 and a sixth valve 56, and the fifth valve 55 and the sixth valve 56 are both arranged on the non-common part of the third circulation loop, that is, the fifth valve 55 and the sixth valve 56 can only control the on-off of the third circulation loop.

A second circulation pump 62 for powering the second circulation loop and the third circulation loop is provided on a common portion of the second circulation loop and the third circulation loop.

And a seventh valve 57 and a third circulating pump 63 are respectively arranged on the fourth circulating loop.

The device has two heating modes:

firstly, when the required temperature is above 90 ℃, for example, the high-temperature steam box effect is realized, the mode that the solar heat collector 1 directly supplies heat to the test box 4 is selected, namely, the second circulation loop is opened, and the first circulation loop, the third circulation loop and the fourth circulation loop are all in a closed state.

Secondly, when the required temperature is below 90 ℃, the mode of supplying heat to the test box 4 by the temperature control water tank 2 is selected, namely the second circulation loop is closed, the opening and closing of the first circulation loop and the fourth circulation loop are controlled by the controller 422, so that the temperature in the temperature control water tank 2 is controlled, and the heat is supplied to the test box 4 by the third circulation loop. When in work, the first circulation loop or the fourth circulation loop is controlled to be opened or closed according to the temperature signal fed back by the thermometer on the temperature control water tank 2,

under the initial condition, the water in the water tank is normal temperature water, the temperature is close to the ambient temperature, the assumed temperature value is 25 ℃, when the required temperature in the test box 4 is greater than 25 ℃, the temperature difference between the temperature control water tank and the temperature set in the test box is set to be 4 ℃, the first circulation loop is started through the controller 422 to start the heat supply mode, the third circulation loop is started to supply heat to the test box 4 when the temperature control water tank reaches 29 ℃, in the heat supply process, the stable control of the internal temperature of the temperature control water tank is realized by adjusting the flow rate of a water pump or starting and stopping, and the heat absorption capacity of the temperature control water tank in the temperature rising coil pipe and the heat supply capacity to the test box are in dynamic balance. When the temperature in the test chamber is less than 25 ℃, the temperature difference between the temperature control water tank and the temperature set in the test chamber is set to be 4 ℃, at the moment, the fourth circulation loop is started through the controller 422 to start a refrigeration cooling mode, the low-temperature water tank is filled with ice-water mixture, the cold source temperature of the low-temperature water tank is constant through ice storage, the subsequent operation process is similar to the heating mode until the thermometer feedback signal on the temperature control water tank 2 reaches the preset temperature value, then the third circulation loop is started to control the temperature of the test chamber 4, and repeated adjustment is carried out by taking the temperature as a circulation.

As a specific implementation manner, in this embodiment, the upper ring pipe 441 and the lower ring pipe 442 are both arc-shaped structures, and a central angle corresponding to the arc-shaped structures is greater than 340 °, that is, the upper ring pipe 441 and the lower ring pipe 442 are annular with an opening. One end of the upper ring pipe 441 is closed, and the other end of the upper ring pipe 441 is provided with a water outlet pipe which is arranged along the radial direction. One end of the lower ring pipe 442 is closed, and the other end of the lower ring pipe 442 is provided with a water inlet pipe which is arranged along the radial direction.

Preferably, the inner diameter of the capillary 443 is 2 to 5 mm.

The provision of the annular wall capillary tube heat exchanger 44 herein has two main advantages:

first, because the capillaries 443 are uniformly and densely distributed around the test chamber 4, the water in the capillaries 443 can rapidly exchange heat with the inside of the test chamber, and the capillary heat exchanger has the characteristics of large heat exchange area and small heat exchange temperature difference, and can rapidly realize uniform distribution of the temperature in the test chamber.

Secondly, water naturally rises in the capillary 443 due to capillary action (the capillary action is a phenomenon occurring in the capillary 443 with a certain linear dimension small enough to be compared with the curvature radius of a liquid meniscus, the capillary action is the attraction of the liquid surface to the solid surface, the capillary 443 is inserted into the immersion liquid, the liquid level in the capillary rises higher than that outside the capillary), and the naturally rising height can be obtained by controlling the material and the pipe diameter of the inner surface of the capillary 443, so that zero-energy-consumption operation can be realized under partial working conditions, that is, the water in the capillary 443 can enter the upper ring pipe 441 only by the capillary action; even if the zero-energy-consumption operation cannot be achieved under partial working conditions, the auxiliary operation of the water pump is needed, the power of the water pump can be greatly reduced, and the energy-saving and environment-friendly effects are achieved.

Further, because solar collector 1 receives environmental factor's influence great, the temperature of water in the solar collector 1 can reach 100 ℃ when sunshine is sufficient, and when adopting first heat supply mode, when the mode that solar collector 1 directly supplies heat to proof box 4 promptly, only solar collector 1 supplies heat, can't adjust heat supply temperature, and final heat supply temperature is direct to be decided by environmental factor.

Therefore, as shown in fig. 4, a partition plate 48 made of a heat insulating material is fixedly disposed in the heat insulating barrel 41, and the partition plate 48 divides the inner space of the heat insulating barrel 41 into an upper part and a lower part. The annular wall type capillary heat exchanger 44 and the metal inner cylinder 43 are both disposed above the partition plate 48, and as shown in fig. 5, a first annular limiting plate 481 is disposed on an upper side surface of the partition plate 48, and a lower end of the metal inner cylinder 43 is inserted into the first limiting plate 481. As shown in fig. 6 and 10, a second annular limiting plate 421 is disposed on the lower side surface of the upper cover 42, and the upper end of the metal inner cylinder 43 is inserted into the second limiting plate 421.

As shown in fig. 4, a fan 46 is fixedly disposed on the bottom surface of the insulating barrel 41, and as a specific implementation, the fan 46 is an axial flow fan 46 in this embodiment. As shown in fig. 5, air inlets 482 are uniformly distributed in the annular region of the partition plate 48 between the insulating barrel 41 and the metal inner barrel 43. As shown in fig. 6 and 7, the side wall of the insulating barrel 41 is uniformly provided with air vents 411 along the circumferential direction. The outer side of the heat-insulating barrel body 41 is sleeved with a sealing ring for plugging the exhaust holes 411. As a specific embodiment, as shown in fig. 7 and 8, the sealing ring is composed of two semicircular sealing strips 47, and two ends of the two sealing strips 47 are respectively fixedly connected through screws. After the screws are screwed down, the sealing ring is hooped on the outer side wall of the heat-insulating barrel body 41.

Thus, when the solar collector 1 directly supplies heat, the sealing ring can be removed, and at this time, the controller 422 controls the fan 46 to be turned on and off according to the temperature signal fed back from the thermometer on the test chamber 4, thereby controlling the temperature inside the test chamber 4.

Under the mode of controlling the temperature water tank 2 to supply heat, exhaust hole 411 is in the shutoff state under the effect of sealing ring, and fan 46 be in the closed condition all the time, only control the temperature in the proof box 4 by controlling temperature water tank 2 this moment.

Further, as shown in fig. 7, a supporting plate 412 is disposed on the outer side wall of the insulating barrel 41 below the sealing ring. The supporting plate 412 is arranged to play a supporting role on the one hand and facilitate positioning and installation of the sealing ring on the other hand.

Further, in order to improve the capillary effect, the capillary 443 is preferably made of plastic, but the thermal conductivity of the plastic is not good. For this purpose, the capillary tube 443, the upper ring tube 441 and the lower ring tube 442 are made of plastic, and as shown in fig. 16, a metal sleeve 444 is sleeved outside the capillary tube 443, and fins 4441 arranged in a radial manner are provided outside the metal sleeve 444.

As a specific embodiment, the capillary 443, the upper ring pipe 441 and the lower ring pipe 442 in this embodiment are made of PPB plastic, which has better thermal performance than PPR and has good capillary phenomenon. The metal sleeve 444 and the fins 4441 are made of aluminum, and the number of the fins 4441 is four.

As shown in fig. 6 and 11, the fixing assembly 45 is disposed between the upper ring pipe 441 and the metal inner cylinder 43, and the fixing assembly 45 includes a U-shaped bolt 451, and an open end of the U-shaped bolt 451 is fixedly connected to the metal inner cylinder 43 through a locking nut. As shown in fig. 14, a push plate 453 is slidably disposed on the U-shaped bolt 451 and located outside the inner metal tube 43, and guide holes 4531 for receiving a linear portion of the U-shaped bolt 451 are respectively disposed at upper and lower ends of the push plate 453, and the push plate 453 is slidable along the linear portion of the U-shaped bolt 451. The upper ring 441 of the collector of the walled capillary 443 is confined within the enclosed area formed by the U-bolt 451 and the push plate 453. The metal inner cylinder 43 is provided with a puller bolt 455, and the push plate 453 is pressed on the upper ring pipe 441 under the action of the puller bolt 455.

Further, a fixing assembly 45 is disposed between the lower ring pipe 442 and the metal inner cylinder 43.

Further, as shown in fig. 11, a first cushion 452 is disposed inside a bent portion of the U-shaped bolt 451, and a mounting groove 4511 for receiving the first cushion 452 is disposed on the U-shaped bolt 451.

Preferably, as shown in fig. 12, 13 and 15, the mounting groove 4511 has a T-shaped cross-section, and accordingly, the first cushion 452 has a T-shaped cross-section, so that the first cushion 452 is prevented from falling off during mounting and dismounting.

Further, as shown in fig. 11, a second buffer pad 454 is fixedly disposed on the push plate 453, and an arc-shaped groove for receiving the upper ring pipe 441 is disposed on the second buffer pad 454.

Example two

As shown in fig. 17, the upper ring pipe 441 and the lower ring pipe 442 are both in a complete arc shape, the upper ring pipe 441 is provided with a water outlet pipe, the lower ring pipe 442 is provided with a water inlet pipe, and the water inlet pipe and the water outlet pipe are both arranged along a radial direction, and the rest of the structure is the same as that of the first embodiment.

Claims

1. The utility model provides a solar energy capillary temperature gradient case which characterized in that: the system comprises a solar heat collector, a temperature control water tank, a low-temperature water tank, a test box and a controller;

the temperature control water tank is connected with the annular wall type capillary heat exchanger through a fifth pipeline and a sixth pipeline, a third circulation loop is formed, and a fifth valve and a second circulation pump are arranged on the third circulation loop;

the heat-preserving container body in the fixed baffle that is formed by the insulation material preparation that is provided with, rampart formula capillary heat exchanger and metal inner tube all set up in the top of baffle, the fixed fan that is provided with on the bottom surface of heat-preserving container body, the baffle on lie in the annular region equipartition between heat-preserving container body and the metal inner tube is provided with the inlet port, be provided with the exhaust hole on the lateral wall of heat-preserving container body, the outside cover of heat-preserving container body is equipped with and is used for the shutoff the sealing ring in exhaust hole.

2. A solar capillary temperature gradient box according to claim 1, wherein: the solar heat collector is connected with the annular wall type capillary heat exchanger through a third pipeline and a fourth pipeline to form a second circulation loop, a third valve and a fourth valve are respectively arranged on the third pipeline and the fourth pipeline, and the third valve and the fourth valve can only control the on-off of the second circulation loop;

3. A solar capillary temperature gradient box according to claim 1, wherein: and a supporting plate is arranged on the outer side wall of the heat-insulating barrel body and below the sealing ring.

4. A solar capillary temperature gradient box according to claim 1, wherein: the baffle and the upper cover are respectively provided with a first annular limiting plate and a second annular limiting plate, the lower end of the metal inner cylinder is inserted into the first limiting plate, and the upper end of the metal inner cylinder is inserted into the second limiting plate.

5. A solar capillary temperature gradient box according to claim 1, wherein: the capillary tube, the upper ring tube and the lower ring tube are all made of plastic materials, a metal sleeve is sleeved outside the capillary tube, and fins which are radially arranged are arranged outside the metal sleeve.

6. A solar capillary temperature gradient box according to claim 1, wherein: the upper ring pipe and the lower ring pipe are respectively fixedly connected with the metal inner cylinder through fixing components, each fixing component comprises a U-shaped bolt and a push plate which is arranged on the U-shaped bolt in a sliding mode, the open end of the U-shaped bolt is fixedly connected with the metal inner cylinder, the upper ring pipe and the lower ring pipe are limited in a closed area formed by the U-shaped bolt and the push plate, and a jacking bolt used for jacking the push plate is arranged on the metal inner cylinder.

7. A solar capillary temperature gradient box according to claim 6, wherein: a first cushion pad is arranged on the inner side of the bending portion of the U-shaped bolt, and a second cushion pad is fixedly arranged on the push plate.

8. A solar capillary temperature gradient box according to claim 7, wherein: and an arc-shaped groove is formed in the second buffer cushion.

9. A solar capillary temperature gradient box according to claim 1, wherein: the inner diameter of the capillary tube is 2-5 mm.