CN113494778B

CN113494778B - Loop heat pipe solar pressure difference control method

Info

Publication number: CN113494778B
Application number: CN202010255402.1A
Authority: CN
Inventors: 王丽; 宁文婧; 郭春生; 许艳锋; 李言伟; 江程; 马军; 薛于凡; 谷潇潇; 刘元帅; 薛丽红; 李蒸; 韩卓晟; 逯晓康
Original assignee: Shandong University
Current assignee: Shandong University
Priority date: 2020-04-02
Filing date: 2020-04-02
Publication date: 2023-11-21
Anticipated expiration: 2040-04-02
Also published as: CN113494778A

Abstract

The invention provides a portable remote loop heat pipe pressure difference descaling control method, which comprises the steps that a controller extracts pressure data according to time sequence, the pressure data of adjacent time periods are compared to obtain the pressure difference or the accumulation of pressure difference change, the controller is connected with a cloud server, the cloud server is connected with a client, the controller transmits the pressure difference or the accumulation of pressure difference change to the cloud server and then transmits the pressure difference or the accumulation of pressure difference change to the client through the cloud server, the client is a mobile phone, an APP program is installed on the mobile phone, a user can select an automatic control or manual control working mode at the client, and the controller controls the heat collection of a heat collector according to the working mode selected by the control client. According to the invention, through the mobile phone APP client, automatic control of heat collection and scale removal of the heat collector through pressure difference or accumulated pressure difference is realized through the controller, energy is saved, the best efficiency is achieved, the intellectualization of the heat exchange system is improved, and remote portable monitoring is realized.

Description

Loop heat pipe solar pressure difference control method

Technical Field

The invention belongs to the field of solar energy, and particularly relates to a solar heat collector system.

Background

With the rapid development of modern society economy, the demand of human beings for energy is increasing. However, the traditional energy reserves of coal, petroleum, natural gas and the like are continuously reduced and increasingly scarce, so that the price is continuously increased, and the environmental pollution problem caused by the conventional fossil fuel is also more serious, which greatly limits the social development and the improvement of the quality of life of human beings. The energy problem has become one of the most prominent problems in the contemporary world. Thus, the search for new energy sources, especially clean energy sources without pollution, has become a hot spot of current research.

Solar energy is inexhaustible clean energy, and has huge resource quantity, and the total amount of solar radiation energy collected by the earth surface every year is 1 multiplied by 10 ¹⁸ kW.h, which is tens of thousands of times the total energy consumption in the world. The use of solar energy has been an important item in the development of new energy sources in countries around the world. However, since solar radiation reaches the earth with a small energy density (about one kw per square meter) and is discontinuous, this presents a difficulty for large-scale exploitation and utilization. Therefore, in order to widely utilize solar energy, not only technical problems are solved, but also economy must be competitive with conventional energy sources.

Aiming at the structure of the heat collector, the prior art has been developed and improved, but the heat collecting capacity is not enough as a whole, and the problem of easy scaling caused by long running time is also existed, so that the heat collecting effect is affected.

In either form and configuration of solar collector, an absorber element is required to absorb solar radiation, and the collector structure plays an important role in solar energy absorption.

The application improves on the basis of the application, and provides a novel loop heat pipe solar heat collection system, so that the problems of low heat exchange quantity of a heat pipe and uneven heat exchange of the heat pipe are solved.

In application, it is found that continuous solar heat collection heating or no heating at night can lead to the formation stability of internal fluid, namely, the fluid no longer flows or has little fluidity, or the flow is stable, so that the vibration performance of the heat collection tube is greatly reduced, and the descaling and heating efficiency of the heat collection tube are affected. There is therefore a need for improvements in the solar collectors described above. The inventors have filed a related patent thereto.

However, in practice it has been found that by adjusting the vibration of the tube bundle by a fixed periodic variation, hysteresis occurs and the period is too long or too short. Therefore, the application improves the prior application and intelligently controls the vibration, so that the fluid in the interior can vibrate frequently, and the scale removal and heating effects are very good.

In the prior application, a descaling method of the heat collector is researched, but the intelligent degree is not high, and remote control cannot be realized.

Disclosure of Invention

The invention provides a heat collecting device with a novel structure aiming at the defects in the prior art. The heat collecting device can be intelligently controlled according to parameters, and the heat utilization effect and the descaling effect are improved.

In order to achieve the above purpose, the invention adopts the following technical scheme:

the portable remote loop heat pipe pressure difference descaling control method comprises the steps that the heat collecting device comprises a reflecting mirror and a heat collecting pipe box, the heat collecting device comprises a descaling stage, and the heat collecting device operates in the following mode: in the descaling stage, the method is operated in the following way:

the pressure detection element is arranged in the heat collection device and used for detecting the pressure in the heat collection device, the controller extracts pressure data according to time sequence, the pressure difference or the accumulation of pressure difference change is obtained through comparison of the pressure data of adjacent time periods, the controller is connected with the cloud server, the cloud server is connected with the client, the controller transmits the pressure difference or the accumulation of pressure difference change to the cloud server and then transmits the pressure difference or the accumulation of pressure difference change to the client through the cloud server, the client is a mobile phone, an APP program is installed on the mobile phone, a user can select an automatic control or manual control working mode at the client, and the controller controls heat collection of the heat collection device according to the working mode selected by the control client.

Preferably, in a manual control working mode, a user obtains pressure difference or accumulated data of pressure difference change according to a client, a control signal is manually input into the client, and then the control signal is transmitted to a central controller through a cloud server, and the central controller controls whether to collect heat of a heat collection pipe box according to the signal input by the client.

Preferably, in the automatic control operation mode, when the pressure difference or the accumulation of the pressure difference changes is lower than a threshold value, the controller controls whether to collect heat from the heat collecting pipe box according to the detected pressure difference;

if the pressure in the previous time period is P1, the pressure in the adjacent subsequent time period is P2, and if P1< P2 is lower than a threshold value, the controller controls the heat collection pipe box to stop heat collection; if P1> P2, when the threshold value is lower, the controller controls the heat collection of the heat collection pipe box.

Preferably, the heat collecting device comprises a heat collecting tube box, an upper left tube, an upper right tube and a heat release tube group which are positioned at the lower part, wherein the upper left tube and the upper right tube are positioned at the upper part of the heat collecting tube box, the heat release tube group comprises a left heat release tube group and a right heat release tube group, the left heat release tube group is communicated with the upper left tube and the heat collecting tube box, the right heat release tube group is communicated with the upper right tube and the heat collecting tube box, so that the heat collecting tube box, the upper left tube, the upper right tube and the heat release tube group form a heating fluid closed cycle, one or more heat release tube groups are arranged, each heat release tube group comprises a plurality of heat release tubes in a circular arc shape, the end parts of the adjacent heat release tubes are communicated, the plurality of heat release tubes form a serial structure, and the end parts of the heat release tubes form free ends of the heat release tubes; the heat collecting pipe box comprises a first pipe orifice and a second pipe orifice, wherein the first pipe orifice is connected with an inlet of the left heat release pipe group, the second pipe orifice is connected with an inlet of the right heat release pipe group, an outlet of the left heat release pipe group is connected with an upper left pipe, and an outlet of the right heat release pipe group is connected with an upper right pipe.

Preferably, the left heat radiation pipe group and the right heat radiation pipe group are symmetrical along a middle portion of the heat collecting pipe box.

Preferably, the heat release pipes of the left heat release pipe group are distributed by taking the axis of the left upper pipe as the center of a circle, and the heat release pipes of the right heat release pipe group are distributed by taking the axis of the right upper pipe as the center of a circle.

The volumes of the left upper pipe 21 and the right upper pipe 22 are V1 and V2 respectively, the volume of the heat collection box is V3, and the included angle formed between the midpoint of the bottom of the heat collection box and the centers of the left upper pipe 21 and the right upper pipe 22 is A, so that the following requirements are met:

(V1+V2)/V3＝a-b*sin(A/2) ² -c sin (a/2); where a, b, c are parameters, sin is a triangular orthomyxoy function,

0.8490< a <0.8492,0.1302< b <0.1304,0.0020< c <0.0022; preferably, a=0.8491, b=0.1303, c=0.0021.

Preferably, the included angle A formed between the middle point of the bottom of the heat collection box body and the centers of the left upper pipe 21 and the right upper pipe 22 is 40-120 degrees (angle), preferably 80-100 degrees (angle).

Preferably, 0.72< (v1+v2)/V3 <0.85;

preferably, the radius of the heat-radiating pipe is 10-40mm; preferably 15 to 35mm, and more preferably 20 to 30mm.

The invention has the following advantages:

1. according to the invention, through the mobile phone APP client, remote portable automatic control of the pressure difference of the heat exchange system or the scale removal of the accumulated pressure difference is realized through the controller, so that energy is saved, the best efficiency is achieved, the intellectualization of heat collection and scale removal is improved, and the remote control is realized.

2. According to the invention, the pressure difference or the accumulated pressure difference in the front and rear time periods detected by the pressure sensing element can be used for judging that the evaporation of the fluid in the interior is basically saturated and the volume of the fluid in the interior is basically not changed greatly, and in such a case, the fluid in the interior is relatively stable, and the vibration of the tube bundle is poor, so that the tube bundle needs to be adjusted to vibrate, and heat collection is stopped. So that the fluid undergoes a volume reduction to thereby effect vibration. When the pressure difference decreases to a certain extent, the internal fluid again starts to enter a steady state, and heat collection is needed to enable the fluid to be vaporized and expanded again, so that heat collection needs to be started.

3. The invention provides a heat collecting device with a novel structure, which can improve the heat collecting effect, improve the heat release capacity of a heat collecting tube and reduce the energy consumption.

4. A heat collector with novel structure is characterized in that more heat-emitting tube groups are arranged in a limited space, so that the vibration range of a tube bundle is increased, heat transfer is enhanced, and descaling is enhanced.

5. The heat exchange efficiency can be further improved through the arrangement of the pipe diameters and the interval distribution of the heat release pipe groups in the fluid flowing direction.

6. According to the invention, through a large number of experiments and numerical simulation, the optimal relation of parameters of the heat collecting device is optimized, so that the optimal heating efficiency is realized.

Description of the drawings:

fig. 1 is a front view of a heat collecting device of the present invention.

Fig. 2-1 is a front view of a heat collector of the heat collecting system of the present invention.

Fig. 2-2 is a front view of a non-heat collecting system of the present invention.

Fig. 2-3 are front views of heat collectors of preferred heat collecting devices of the present invention.

Fig. 2-4 are front elevational views of a preferred heat collector of the present invention.

Fig. 3 is a left side view of the heat collector of fig. 1 in accordance with the present invention.

Fig. 4 is a bottom view of the heat collector of fig. 1 in accordance with the present invention.

FIG. 5 is a schematic diagram of the heat collecting device according to the present invention, showing the heat-emitting tube group staggered arrangement.

Fig. 6 is a schematic diagram of the size and structure of the heat collecting device.

Fig. 7 is a cross-sectional view of a preferred hydraulic pump.

Fig. 8 is a schematic diagram of a remote control flow.

In the figure: 1. a radiator tube group, a left radiator tube group 11, a right radiator tube group 12, 21, a left upper tube, 22, a right upper tube, 3, a free end, 4, a free end, 5, a free end, 6, a free end, 7, a radiator tube, 8, a heat collecting tube box, 9, a box body, 10 a first tube orifice, 13 a second tube orifice, a left return tube 14, a right return tube 15, 16 reflectors, and 17 supports;

24. Right hydraulic pump, 25, left hydraulic pump, 26, right hydraulic device, 27, left hydraulic device, 28, right telescopic link, 29, left telescopic link, 30, eccentric wheel, 31, check valve, 32, hydro-cylinder, 33, stop valve, 34, plunger.

Detailed Description

The following describes the embodiments of the present invention in detail with reference to the drawings.

Herein, "/" refers to division, "×", "x" refers to multiplication, unless otherwise specified.

As shown in fig. 1, a heat collecting device comprises a heat collecting tube box 8, an upper left tube 21, an upper right tube 22 and a heat release tube group 1, wherein the heat release tube group 1 comprises a left heat release tube group 11 and a right heat release tube group 12, the left heat release tube group 11 is communicated with the upper left tube 21 and the heat collecting tube box 8, the right heat release tube group 12 is communicated with the upper right tube 22 and the heat collecting tube box 8, so that the heat collecting tube box 8, the upper left tube 21, the upper right tube 22 and the heat release tube group 1 form a heating fluid closed cycle, the heat collecting tube box 8 is filled with phase change fluid, each heat release tube group 1 comprises a plurality of heat release tubes 7 in a circular arc shape, the end parts of the adjacent heat release tubes 7 are communicated, the plurality of heat release tubes 7 form a serial structure, and the end parts of the heat release tubes 7 form heat release tube free ends 3-6; the heat collecting pipe box comprises a first pipe orifice 10 and a second pipe orifice 13, wherein the first pipe orifice 10 is connected with the inlet of the left heat release pipe group 11, the second pipe orifice 13 is connected with the inlet of the right heat release pipe group 12, the outlet of the left heat release pipe group 11 is connected with the left upper pipe 21, and the outlet of the right heat release pipe group 12 is connected with the right upper pipe 22; the first pipe orifice 10 and the second pipe orifice 13 are provided on the side of the collector tube case 8. Preferably, the left heat radiation pipe group 11 and the right heat radiation pipe group 12 are symmetrical along the middle position of the heat collecting pipe case.

Preferably, the upper left tube 21, the upper right tube 22 and the heat release tube group 1 are provided in the tank 9, and a fluid, preferably air or water, is flowing in the tank 9.

Preferably, the upper left tube 21, the upper right tube 22 and the heat collecting pipe box 8 extend in the horizontal direction.

Preferably, the fluid flows in a horizontal direction.

Preferably, a plurality of heat radiation pipe groups 1 are provided extending in the horizontal direction along the upper left pipe 21, the upper right pipe 22 and the heat collecting pipe box 8, and the heat radiation pipe groups 1 are connected in parallel.

Preferably, a left return pipe 14 is arranged between the left upper pipe 21 and the heat collecting pipe box 8, and a right return pipe 15 is arranged between the right upper pipe 22 and the heat collecting pipe box 8. Preferably, the return pipes are provided at both ends of the heat collecting pipe box 8.

The heat collecting pipe box 8 is filled with a phase change fluid, preferably a vapor-liquid phase change fluid. The fluid is heated and evaporated in the heat collecting tube box 8, flows along the heat release tube bundles to the left upper tube 21 and the right upper tube 22, and expands in volume after being heated, so that steam is formed, and the volume of the steam is far greater than that of water, so that the formed steam can quickly impact flow in the coil. Because the volume expansion and the steam flow can induce the free end of the heat release pipe to vibrate, the free end of the heat exchange pipe transmits the vibration to the heat exchange fluid in the box body 9 in the vibration process, and the fluids can generate disturbance to each other, so that the surrounding heat exchange fluid forms disturbance and damages a boundary layer, and the aim of enhancing heat transfer is fulfilled. The fluid flows back to the heat collecting tube box through the return tube after the left and right upper tubes condense and release heat.

According to the application, the prior art is improved, the upper pipe and the heat release pipe groups are respectively arranged into two heat release pipe groups which are distributed left and right, so that the heat release pipe groups distributed on the left side and the right side can perform vibration heat exchange and scale removal, the heat exchange vibration area is enlarged, the more uniform vibration is realized, the more uniform heat exchange effect is realized, the heat exchange area is increased, and the heat exchange and scale removal effects are enhanced.

The application further improves the structure and enhances the descaling and heat exchange effects.

In the operation of the solar heat collector, although the above structure has an elastic vibration descaling effect, the descaling effect is found to be further improved by long-term operation.

It has been found in research and practice that sustained stable heat collection results in a stable fluid formation of the internal heat collection device, i.e. no flow or little flow, or a stable flow, resulting in a significant reduction in the vibration properties of the heat-emitting tube stack 1, thereby affecting the descaling and heating efficiency of the stack 1. For example, the heat collection is continuous in the daytime, or the heat collection is not continuous at night, so that the descaling effect is reduced, the heat collection is continuous in the daytime in the prior application, or the descaling is performed by electric heating at night, and the heat collection effect in the daytime is greatly improved. However, the above-described structure requires a separate electric heating device and also requires an electric heating-related assembly of complicated design, resulting in a complicated structure, and thus the following improvement of the above-described heat collecting device is required.

In the prior application of the present inventor, a periodic heating mode is proposed, and vibration of the coil is continuously promoted by the periodic heating mode, so that heating efficiency and descaling effect are improved. However, by adjusting the vibration of the tube bundle by a fixed periodic variation, hysteresis may occur and the period may be too long or too short. Therefore, the invention improves the prior application and intelligently controls the vibration, so that the fluid in the interior can vibrate frequently, thereby realizing good descaling effect.

Aiming at the defects in the prior research technology, the invention provides a novel intelligent vibration-controlled descaling heat collector. The heat collector can achieve a good descaling effect.

The solar heat collector comprises a descaling stage, and the heat collector operates in the following manner in the descaling stage:

1. autonomous pressure-based adjustment of vibration

Preferably, a pressure detection element is arranged in the heat collection device and used for detecting the pressure in the heat collection device, the controller extracts pressure data according to time sequence, the pressure difference or the accumulation of pressure difference change is obtained through comparison of the pressure data of adjacent time periods, the controller is connected with a cloud server, the cloud server is connected with a client, the controller transmits the pressure difference or the accumulation of pressure difference change to the cloud server and then transmits the data to the client through the cloud server, the client is a mobile phone, an APP program is installed on the mobile phone, a user can select an automatic control or manual control working mode at the client, and the controller controls heat collection of the heat collection device according to the working mode selected by the control client.

Preferably, in the automatic control operation mode, the controller controls whether to collect heat from the heat collecting pipe box according to the detected pressure difference or the accumulation of the pressure difference variation.

According to the invention, through the mobile phone APP client, the automatic control of the heat collector through the pressure difference or the accumulation of the pressure difference change is realized through the controller, the energy is saved, the best efficiency is achieved, the intellectualization of the heat exchange system is improved, and the remote portable monitoring is realized.

Preferably, in the automatic control operation mode, when the pressure difference or the accumulation of the pressure difference changes is lower than a threshold value, the controller controls whether to collect heat from the heat collecting pipe box according to the detected pressure difference or the accumulation of the pressure difference changes.

The pressure difference or the accumulated pressure difference in the front and rear time periods detected by the pressure sensor can be used for judging that the evaporation of the fluid in the interior is basically saturated and the volume of the fluid in the interior is basically not changed greatly, and in such a case, the fluid in the interior is relatively stable, and the vibration of the tube bundle at the moment is poor, so that the tube bundle needs to be adjusted to vibrate, and heat collection is stopped. So that the fluid undergoes a volume reduction to thereby effect vibration. When the pressure difference decreases to a certain extent, the internal fluid again starts to enter a steady state, and heat collection is needed to enable the fluid to be vaporized and expanded again, so that heat collection needs to be started.

The steady state of the fluid is judged according to the pressure difference or the accumulation of the pressure difference change, so that the result is more accurate, and the problem of error increase caused by aging due to the problem of operation time is avoided.

Preferably, if the pressure in the preceding period is P1, the pressure in the adjacent following period is P2, and if P1< P2 is lower than the threshold value, the controller controls the heat collection pipe box to stop collecting heat; if P1> P2, when the threshold value is lower, the controller controls the heat collection of the heat collection pipe box.

The current heat collecting pipe box is in a heat collecting state or a non-heat collecting state through judging the pressure successively, so that the running state of the heat collecting pipe box is determined according to different conditions.

Preferably, if the pressure in the preceding period is P1 and the pressure in the adjacent following period is P2, if p1=p2, the heat collection is judged according to the following condition:

if P1 is larger than the pressure of the first data, the controller controls the heat collecting pipe box to stop heat collection; wherein the first data is greater than the pressure of the phase-change fluid after the phase change has occurred; preferably the first data is the pressure at which the phase change fluid is substantially phase-changed;

and if the P1 is smaller than or equal to the pressure of the second data, the controller controls the heat collecting pipe box to continue collecting heat, wherein the second data is smaller than or equal to the pressure of the phase-change fluid, and the phase change does not occur.

The first data is pressure data of a heat collecting state, and the second data is pressure data of no heat collection or heat collection just started. The judgment of the pressure is also used for determining whether the current heat collecting pipe box is in a heat collecting state or a non-heat collecting state, so that the running state of the heat collecting pipe box is determined according to different conditions.

Preferably, the pressure sensing element is provided in the heat collecting pipe box 8.

Preferably, the pressure sensing element is disposed at the free end. Through setting up at the free end, can perceive the pressure variation of free end to realize better control and regulation.

Preferably, the number of the pressure sensing elements is n, and the pressure P in the current time period is calculated in sequence _i And the pressure Q in the previous period _i-1 Difference D of (2) _i ＝P _i -Q _i-1 And for n pressure differences D _i Performing arithmetic cumulative summationAnd when the value of Y is lower than the set threshold value, the controller controls the heat collection tube box to stop heat collection or to continue heat collection.

Preferably, when Y >0 is lower than the threshold value, the controller controls the heat collection pipe box to stop heat collection; and if Y is less than 0, when the value is lower than the threshold value, the controller controls the heat collection pipe box to collect heat.

Preferably, if y=0, the heat collection is judged according to the following case:

if P _i The arithmetic average of the first data is larger than the pressure of the first data, and the controller controls the heat collecting pipe box to stop heat collection; wherein the first data is greater than the pressure of the phase-change fluid after the phase change has occurred; preferably a pressure at which the phase-change fluid is substantially phase-changed;

if P _i The arithmetic mean of the second data is smaller than the pressure of the second data, and the controller controls the heat collecting pipe box to continue collecting heat, wherein the second data is smaller than or equal to the pressure of the phase-change fluid without phase change.

Preferably, the period of time for measuring the pressure is 1 to 10 minutes, preferably 3 to 6 minutes, and more preferably 4 minutes.

Preferably, the threshold is 100-1000pa, preferably 500pa.

Preferably, the pressure value may be an average pressure value over a period of time. The pressure at a certain point in the time period may also be made. For example, preferably both are pressures at the end of the time period.

2. Autonomously adjusting vibration based on temperature

Preferably, a temperature detection element is arranged in the heat collection device and is used for detecting the temperature in the heat collection device, the temperature detection element is in data connection with a controller, the controller extracts temperature data according to time sequence, the temperature difference or the accumulation of temperature difference change is obtained through comparison of liquid level data of adjacent time periods, the controller is connected with a cloud server, the cloud server is connected with a client, the controller transmits the temperature difference or the accumulation of temperature difference change to the cloud server and then transmits the temperature difference or the accumulation of temperature difference change to the client through the cloud server, the client is a mobile phone, an APP program is installed on the mobile phone, a user can select an automatic control or manual control working mode at the client, and the controller controls the heat collection of the heat collection device according to the working mode selected by the user.

Preferably, in a manual control working mode, a user obtains accumulated data of temperature difference or temperature difference change according to a client, a control signal is manually input into the client, and then the control signal is transmitted to a central controller through a cloud server, and the central controller controls whether to collect heat of a heat collection pipe box according to the signal input by the client.

Preferably, in the automatic control operation mode, the controller controls whether to collect heat from the heat collecting pipe box according to the detected temperature difference or the accumulation of the temperature difference variation.

According to the invention, through the mobile phone APP client, the automatic control of the heat collector through the temperature difference or the accumulation of the temperature difference change is realized through the controller, the energy is saved, the best efficiency is achieved, the intellectualization of the heat exchange system is improved, and the remote portable monitoring is realized.

Preferably, in the automatic control operation mode, the controller controls the heat collecting pipe box to stop collecting heat or to continue collecting heat when the temperature difference or the accumulation of temperature difference changes is lower than a threshold value.

The temperature difference between the front and rear time or the cumulative temperature level detected by the temperature sensor can determine that the evaporation of the fluid in the interior is substantially saturated by the temperature difference, and the volume of the fluid in the interior is not greatly changed. So that the fluid undergoes a volume reduction to thereby effect vibration. When the temperature difference is reduced to a certain degree, the internal fluid starts to enter a stable state again, and heat collection is needed to enable the fluid to evaporate and expand again, so that the heat collection tube box needs to be started to collect heat.

The steady state of the fluid is judged according to the temperature difference or the accumulation of the temperature difference change, so that the result is more accurate, and the problem of error increase caused by aging due to the problem of operation time is avoided.

Preferably, if the temperature of the preceding time period is T1, the temperature of the adjacent following time period is T2, and if T1< T2 is lower than the threshold value, the controller controls the heat collecting pipe box to stop heat collection; if T1> T2, when the threshold value is lower, the controller controls the heat collection pipe box to collect heat.

The current heat collecting pipe box is in a heat collecting state or a non-heat collecting state through the temperature judgment in sequence, so that the running state of the heat collecting pipe box is determined according to different conditions.

Preferably, if the temperature of the preceding period is T1 and the temperature of the adjacent following period is T2, if t1=t2, the heat collection is judged according to the following condition:

if T1 is greater than the temperature of the first data, the controller controls the heat collecting pipe box to stop heat collection; wherein the first data is greater than a temperature of the phase-change fluid after the phase change has occurred; preferably the first data is the temperature at which the phase change fluid is sufficiently phase-changed;

and if T1 is less than or equal to the temperature of the second data, the controller controls the heat collection pipe box to continue collecting heat, wherein the second data is less than or equal to the temperature at which the phase change fluid does not generate phase change.

The first data is temperature data of a sufficient heat collection state, and the second data is temperature data of no heat collection or just beginning heat collection. The judgment of the temperature is also used for determining whether the current heat collecting pipe box is in a heat collecting state or a non-heat collecting state, so that the running state of the heat collecting pipe box is determined according to different conditions.

Preferably, the number of the temperature sensing elements is n, and the temperature T in the current time period is calculated in sequence _i And the previous time period temperature Q _i-1 Difference D of (2) _i ＝T _i -Q _i-1 And for n temperature differences D _i Performing arithmetic cumulative summationAnd when the value of Y is lower than the set threshold value, the controller controls the heat collection tube box to stop heat collection or to continue heat collection.

if T _i The arithmetic average of the first data is larger than the temperature of the first data, and the controller controls the heat collecting pipe box to stop heat collection; wherein the first data is greater than a temperature of the phase-change fluid after the phase change has occurred; preferably a temperature at which the phase change fluid is substantially phase-changed;

If T _i The arithmetic mean of the second data is smaller than the temperature of the second data, and the controller controls the heat collecting pipe box to continue collecting heat, wherein the second data is smaller than or equal to the temperature at which the phase change fluid does not generate phase change.

Preferably, the period of time for measuring the temperature is 1 to 10 minutes, preferably 3 to 6 minutes, and more preferably 4 minutes.

Preferably, the threshold is 1-10 degrees celsius, preferably 4 degrees celsius.

Preferably, the temperature sensing element is provided in the heat collecting pipe box 8.

Preferably, the temperature sensing element is disposed at the free end. Through setting up at the free end, can perceive the temperature variation of free end to realize better control and regulation.

3. Autonomous adjustment of vibration based on liquid level

Preferably, a liquid level detection element is arranged in the heat collection tube box and is used for detecting the liquid level of fluid in the lower tube box, the liquid level detection element is in data connection with a controller, the controller extracts liquid level data according to time sequence, the liquid level difference or accumulation of liquid level difference change is obtained through comparison of the liquid level data of adjacent time periods, the controller is connected with a cloud server, the cloud server is connected with a client, the controller transmits the liquid level difference or accumulation of liquid level difference change to the cloud server, the liquid level difference or accumulation of liquid level difference change is transmitted to the client through the cloud server, the client is a mobile phone, an APP program is installed on the mobile phone, a user can select an automatic control or manual control working mode at the client, and the controller controls heat collection of the heat collector according to the working mode selected by the control client.

Preferably, in the manual control working mode, the user obtains the liquid level difference or the accumulated data of the liquid level difference change according to the client, manually inputs a control signal at the client, and then transmits the control signal to the central controller through the cloud server, and the central controller controls whether to collect heat of the heat collection tube box according to the signal input by the client.

Preferably, in the automatic control operation mode, the controller controls whether to collect heat from the heat collection pipe box according to the detected liquid level difference or the accumulation of the liquid level difference change.

According to the invention, through the mobile phone APP client, the automatic control of the heat collector through the liquid level difference or accumulation of the liquid level difference change is realized through the controller, the energy is saved, the best efficiency is achieved, the intellectualization of the heat exchange system is improved, and the remote portable monitoring is realized.

Preferably, in the automatic control operation mode, the controller controls the heat collecting pipe box to stop heat collection or to continue heat collection when the liquid level difference or the accumulation of liquid level difference changes is lower than a threshold value.

The liquid level difference or the accumulated liquid level difference between the front and rear time detected by the liquid level sensing element can judge that the evaporation of the fluid in the interior is basically saturated and the volume of the fluid in the interior is basically not changed greatly, and in such a case, the fluid in the interior is relatively stable, and the vibration of the tube bundle at the moment is poor, so that the tube bundle needs to be adjusted to vibrate, and heat collection is stopped. So that the fluid undergoes a volume reduction to thereby effect vibration. When the liquid level difference rises to a certain degree, the internal fluid starts to enter a stable state again, and heat collection is needed to enable the fluid to evaporate and expand again, so that the heat collection pipe box needs to be started to collect heat.

The steady state of the fluid is judged according to the liquid level difference or the accumulation of the liquid level difference change, so that the result is more accurate, and the problem of error increase caused by aging due to the problem of operation time is avoided.

Preferably, if the liquid level in the previous period is L1, the liquid level in the adjacent subsequent period is L2, and if L1> L2, the controller controls the heat collecting pipe box to stop heat collection; if L1< L2, when the threshold value is lower, the controller controls the heat collection pipe box to collect heat.

The current heat collecting pipe box is in a heat collecting state or a non-heat collecting state through judging the liquid level sequentially, so that the running state of the heat collecting pipe box is determined according to different conditions.

Preferably, if the liquid level in the preceding period is L1, the liquid level in the adjacent following period is L2, and if l1=l2, the heat collection is judged according to the following condition:

if L1 is smaller than the liquid level of the first data or L1 is 0, the controller controls the heat collecting pipe box to stop heat collection; wherein the first data is greater than the liquid level of the phase-change fluid after the phase change; preferably the first data is a level at which the phase change fluid is substantially phase-changed;

and if L1 is greater than or equal to the liquid level of the second data, the controller controls the heat collecting pipe box to continue collecting heat, wherein the second data is less than or equal to the liquid level of the phase-change fluid, and the phase change of the liquid level is not generated.

The first data are liquid level data in a full heat collection state, including the liquid level of dry, and the second data are liquid level data without heat collection or just beginning heat collection. The judgment of the liquid level is also used for determining whether the current heat collecting pipe box is in a heat collecting state or a non-heat collecting state, so that the running state of the heat collecting pipe box is determined according to different conditions.

Preferably, the number of the liquid level sensing elements is n, and the liquid level L in the current time period is calculated in sequence _i With the level Q of the previous period _i-1 Difference D of (2) _i ＝L _i -Q _i-1 And for n liquid level differences D _i Performing arithmetic cumulative summationAnd when the value of Y is lower than the set threshold value, the controller controls the heat collection tube box to stop heat collection or to continue heat collection.

if L _i The arithmetic average of the first data is smaller than the liquid level of the first data or is 0, and the controller controls the heat collecting pipe box to stop heat collection; wherein the first data is greater than the liquid level of the phase-change fluid after the phase change; preferably a liquid level at which the phase-change fluid is substantially phase-changed;

If L _i The arithmetic average of the second data is larger than the liquid level of the second data, and the controller controls the heat collecting pipe box to continue collecting heat, wherein the second data is smaller than or equal to the liquid level of the phase-change fluid, and the phase change of the liquid level is not generated.

Preferably, the period of time also measured is 1 to 10 minutes, preferably 3 to 6 minutes, more preferably 4 minutes.

Preferably, the threshold is 1-10mm, preferably 4mm.

Preferably, the water level value may be an average water level value over a period of time. The water level at a certain point in the time period may be set. For example, the water levels at the end of the time period are all preferred.

4. Autonomous speed-based adjustment of vibration

Preferably, a speed detection element is arranged in the free end of the tube bundle and is used for detecting the flow speed of fluid in the free end of the tube bundle, the speed detection element is in data connection with a controller, the controller extracts speed data according to time sequence, the speed difference or the accumulation of the change of the speed difference is obtained through comparison of the speed data of adjacent time periods, the controller is connected with a cloud server, the cloud server is connected with a client, the controller transmits the accumulated data of the speed difference or the change of the speed difference to the cloud server and then transmits the accumulated data to the client through the cloud server, the client is a mobile phone, an APP program is installed on the mobile phone, a user can select an automatic control or manual control working mode at the client, and the controller controls the heat collection of the heat collector according to the working mode selected by the user.

Preferably, in a manual control working mode, a user obtains accumulated data of speed difference or speed difference change according to a client, a control signal is manually input into the client, and then the control signal is transmitted to a central controller through a cloud server, and the central controller controls whether to collect heat of a heat collection pipe box according to the signal input by the client.

Preferably, in the automatic control operation mode, the controller controls whether to collect heat from the heat collecting pipe box according to the detected speed difference or the accumulation of the speed difference variation.

According to the invention, through the mobile phone APP client, the automatic control of the heat collector through the speed difference or the accumulation of the speed difference change is realized through the controller, the energy is saved, the best efficiency is achieved, the intellectualization of the heat exchange system is improved, and the remote portable monitoring is realized.

Preferably, in the automatic control operation mode, the controller controls the heat collecting pipe box to stop collecting heat or to continue collecting heat when the speed difference or the accumulation of the speed difference changes is lower than a threshold value.

The difference in speed between the front and rear time and the cumulative difference in speed detected by the speed sensor can be used to determine that the evaporation of the fluid in the interior is substantially saturated and that the volume of the fluid in the interior is not greatly changed. So that the fluid undergoes a volume reduction to thereby effect vibration. When the speed difference is reduced to a certain degree, the internal fluid starts to enter a stable state again, and heat collection is needed to enable the fluid to evaporate and expand again, so that the heat collection pipe box needs to be started to collect heat.

The steady state of the fluid is judged according to the speed difference or the accumulation of the speed difference change, so that the result is more accurate, and the problem of error increase caused by aging due to the problem of running time is avoided.

Preferably, if the speed of the previous period is V1, the speed of the adjacent subsequent period is V2, and if V1< V2 is lower than the threshold value, the controller controls the heat collecting pipe box to stop heat collection; and if V1 is greater than V2, when the threshold value is lower than the threshold value, the controller controls the heat collection pipe box to collect heat.

The current heat collecting pipe box is in a heat collecting state or a non-heat collecting state through judging the speed sequentially, so that the running state of the heat collecting pipe box is determined according to different conditions.

Preferably, if the speed of the preceding period is V1 and the speed of the adjacent following period is V2, if v1=v2, the heat collection is judged according to the following condition:

if V1 is greater than the speed of the first data, the controller controls the heat collecting pipe box to stop heat collection; wherein the first data is greater than a velocity of the phase-change fluid after the phase change has occurred; preferably the first data is the speed at which the phase change fluid is sufficiently phase-changed;

and if V1 is smaller than or equal to the speed of the second data, the controller controls the heat collection pipe box to continue collecting heat, wherein the speed of the second data is smaller than or equal to the speed at which the phase change fluid does not generate phase change.

The first data is the speed data of the state of full heat collection, and the second data is the speed data of no heat collection or the beginning of heat collection. The judgment of the speed is also used for determining whether the current heat collecting pipe box is in a heat collecting state or a non-heat collecting state, so that the running state of the heat collecting pipe box is determined according to different conditions.

Preferably, the number of the speed sensing elements is n, and the speed V in the current time period is calculated in sequence _i And a previous time speed Q _i-1 Difference D of (2) _i ＝V _i -Q _i-1 And for n speed differences D _i Performing arithmetic cumulative summationAnd when the value of Y is lower than the set threshold value, the controller controls the heat collection tube box to stop heat collection or to continue heat collection.

if V is _i The arithmetic mean of the first data is greater than the speed of the first data, and the controller controls the heat collecting pipe box to stop heat collection; wherein the first data is greater than a velocity of the phase-change fluid after the phase change has occurred; preferably the rate at which the phase change fluid is sufficiently phase-changed;

If V is _i The arithmetic mean of the second data is less than the speed of the second data, and the controller controls the heat collecting pipe box to continue heat collection, wherein the second data is less than or equal to the speed that the phase change fluid does not generate phase change.

Preferably, the period of time for measuring the velocity is 1 to 10 minutes, preferably 3 to 6 minutes, and more preferably 4 minutes.

Preferably, the threshold is 1-3m/s, preferably 2m/s.

Preferably, the velocity value may be an average pressure value over a period of time. The speed at a certain point in the time period may also be made. For example, the speeds at the end of the time period are all preferred.

Preferably, the heat exchanger comprises a descaling process in which heat exchange is performed in the manner described above.

Preferably, the heat collecting pipe box is collected or not by rotating the reflecting mirror. When heat collection is required (period front period), the reflecting surface of the reflecting mirror faces the sun, and when heat collection is not required (period rear period), the reflecting surface of the reflecting mirror does not face the sun. This may be accomplished by way of a rotating mirror of a conventional solar tracking system, which need not be described in detail herein.

Preferably, another embodiment may be adopted, and the operation of collecting or not collecting heat on the heat collecting tube box is completed by adopting a mode that whether the heat collecting tube box is positioned at the focus of the reflecting mirror. When heat collection is needed (period front period), the heat collection tube box is positioned at the focus of the reflecting mirror, and when heat collection is not needed (period back period), the heat collection tube box is not positioned at the focus of the reflecting mirror.

As shown in fig. 1, the mirror 16 is divided into two parts along the middle part, a first part 161 and a second part 162, and the first part 161 and the second part 162 are shown in fig. 2. The supporting member 17 is a supporting column, and is disposed at a lower portion of the heat collecting pipe box 8, and hydraulic telescopic rods 171, 172 are respectively extended from the supporting column and connected to the first portion 161 and the second portion 162. For driving the first and second portions apart or together. When the first and second portions are brought together, the reflector 16 forms a complete reflector, and the collector box is positioned at the focal point of the reflector 16 for collecting heat from the collector box. When the first part and the second part are separated, the heat collecting pipe box is not positioned at the focus of the first part and the second part, and heat collection is not carried out on the heat collecting pipe box.

Preferably, the hydraulic telescopic rod is connected with a driver, the driver drives the hydraulic telescopic rod to stretch and retract, and the focal point of the reflector is changed in position through the stretching and retracting of the hydraulic telescopic rod.

The hydraulic telescopic rod is pivotally connected to the support 17.

As an improved embodiment, fig. 2-3, 2-4. The heat collecting device comprises a right hydraulic pump 24, a left hydraulic pump 25, a right hydraulic device 26 and a left hydraulic device 27, wherein telescopic rods 35 and 36 are arranged on the upper parts of the right hydraulic device 26 and the left hydraulic device 27 and are connected to the lower parts of a second part 162 and a first part 161 in a pivoting manner, and the right hydraulic pump 24 and the left hydraulic pump 25 respectively drive the right hydraulic device 26 and the left hydraulic device 27 to ascend and descend.

Preferably, the device further comprises a right support bar 28 and a left support bar 29, the right support bar 28 and the left support bar 29 comprising a first part and a second part, the first part being located at the lower part, the lower end of the first part being pivotally connected to the support 17, the second part being a telescopic bar, the upper end of the telescopic bar being pivotally connected to the first part 162 and the second part 162. The telescoping rod is telescoping within the first member. The right support bar 28 and the left support bar 29 serve to support the mirror so that the mirror is held in a lower corresponding position. For example, when the first and second parts of the reflector are integrated, the first and second parts are held in the corresponding positions by the support of the right and left support bars 28 and 29, so that the heat collecting pipe box 8 is positioned at the focal position of the reflector.

Preferably, the first member is a rod, the rod being centrally apertured to enable the telescopic rod to telescope within the first member.

Preferably, the right support rod 28 and the left support telescopic rod 29 are also hydraulically provided, and hydraulic pumps are separately provided, and the first component is a hydraulic device, and the telescopic rods are driven to extend and retract by the hydraulic pumps. The specific construction is similar to that of the right 26 and left 27 hydraulic devices.

Fig. 7 shows a specific structure of the hydraulic pump. As shown in fig. 7, the hydraulic pump includes an eccentric 30, a check valve 31, an oil cylinder 32, a shut-off valve 33, and a plunger 34, and the eccentric 30 is connected to the plunger 34. The plunger 34 is disposed within a plunger cavity 38, the plunger cavity 38 being in communication with the hydraulic pump. The hydraulic pump comprises a cavity, a telescopic rod is arranged at the upper part of the cavity, a plate-shaped structure 39 with the same inner diameter as the cavity of the hydraulic pump is arranged at the lower end of the telescopic rod, a rod-shaped structure 40 extends out of the middle part of the plate-shaped structure, and the rod-shaped structure 40 extends out of the cavity of the hydraulic pump to be connected with a reflector.

The lower part of the cavity is provided with an oil cylinder 32, and two one-way valves 31 are arranged between the oil cylinder and the telescopic rod for allowing liquid to enter the upper part from the lower oil cylinder so as to push the telescopic rod to move upwards; the two one-way valves are respectively arranged at the upper part and the lower part of the communication position of the plunger cavity and the hydraulic pump; the two check valves 31 are provided with a partition wall 37 on the side opposite to the position where the plunger chamber communicates with the hydraulic pump (the side away from the position where the plunger chamber communicates with the hydraulic pump), the partition wall 37 is spaced apart from the side opposite to the position where the plunger chamber of the chamber communicates with the hydraulic pump by a predetermined distance, and a stop valve 33 is provided. By opening the shut-off valve for fluid flow from the upper portion into the lower cylinder 32.

When the reflector is to be lifted to stop the device from collecting heat, the right hydraulic pump 24 and the left hydraulic pump 25 can be driven, and the eccentric wheel 30 can drive the plunger 34 to reciprocate. When the plunger 34 moves to the right, vacuum is generated in the cylinder body, and oil is sucked through the one-way valve, so that the oil suction process is completed. When the plunger 34 moves to the left, the oil in the cylinder is input to the hydraulic system through the check valve 31. The cam rotates continuously to raise the reflector.

When the reflector is lowered to start heat collection, the stop valve 33 is opened, oil at the upper part of the hydraulic system flows back into the oil cylinder, and the reflector is returned to the original position under the action of gravity.

Of course, hydraulic pumps are also a well established technique in the art, and the embodiment of FIG. 7 is merely a brief description and is not intended to be limiting. All hydraulic pumps of the prior art can be used.

The descaling time may preferably be performed after the solar collector is operated for a certain period of time. Preferably when the heat collecting effect is deteriorated.

Preferably, the heat release pipes of the left heat release pipe group are distributed by taking the axis of the left upper pipe as the center of a circle, and the heat release pipes of the right heat release pipe group are distributed by taking the axis of the right upper pipe as the center of a circle. Through setting the left and right upper tubes as the circle centers, the distribution of the heat release tubes can be better ensured, so that the vibration and the heating are uniform.

Preferably, the left heat release pipe group and the right heat release pipe group are each plural.

Preferably, the left heat radiation pipe group and the right heat radiation pipe group are mirror-symmetrical along a plane where the vertical axis of the heat collecting pipe box is located. Through such setting, can make the exothermic pipe distribution of heat transfer more reasonable even, improve the heat transfer effect.

Preferably, the heat collecting pipe box 8 is a flat pipe structure. The heat absorption area is increased by providing a flat tube structure. So that even if the installation position is somewhat remote, the heat collecting pipe box 8 can be ensured to be positioned at the focal position of the reflecting mirror.

Preferably, the left and right heat radiation pipe groups 11 and 12 are arranged in a staggered manner in the horizontal extending direction as shown in fig. 5. Through staggered distribution, vibration heat release and descaling can be performed on different lengths, so that vibration is more uniform, and heat exchange and descaling effects are enhanced.

Preferably, a reflector 16 is provided at a lower portion of the heat collecting device, the heat collecting tank is located at a focal position of the reflector 16, and the left heat radiation pipe group and the right heat radiation pipe group are located in the fluid passage. Thereby forming a solar energy collection system.

Preferably, a support 17 is included, the support 17 supporting the heat collecting device.

Preferably, a fluid channel is included, within which fluid flows. As shown in fig. 2, the heat collecting pipe box 8 is located at the lower end of the fluid passage, as shown in fig. 2. The upper left tube 21, the upper right tube 22, the left heat release tube group 11, and the right heat release tube group 12 are disposed in the fluid passage, and heat the fluid in the fluid passage by heat release.

Preferably, the fluid flow direction is the same as the direction in which the upper left tube 21, the upper right tube 22 and the collector tube box 8 extend. By the arrangement, fluid flushes the heat release pipe group, especially the free end of the heat release pipe group, when flowing, so that the free end vibrates, heat transfer is enhanced, and a descaling effect is achieved.

Preferably, the heat radiation pipe group 1 is provided in plural numbers (for example, on the same side (left side or right side)) along the flow direction of the fluid in the fluid passage, and the pipe diameter of the heat radiation pipe group 1 (for example, on the same side (left side or right side)) is increased continuously along the flow direction of the fluid in the fluid passage.

Along the flowing direction of the fluid, the temperature of the fluid is continuously increased, so that the heat exchange temperature difference is continuously reduced, and the heat exchange capacity is increasingly higher. Through the pipe diameter grow of exothermic nest of tubes, can guarantee that more steam gets into exothermic nest of tubes through upper portion, guarantee along fluid flow direction because steam volume is big and vibration effect is good to make whole heat transfer even. The distribution of the steam in all the heat release pipe groups is uniform, the heat transfer effect is further enhanced, the overall vibration effect is uniform, the heat exchange effect is increased, and the heat exchange effect and the descaling effect are further improved.

Preferably, the tube diameter of the heat radiation tube group (for example, the same side (left side or right side)) is increased in a larger and larger extent along the flow direction of the fluid in the fluid passage.

By the arrangement, the fluid is prevented from exchanging heat at the front part, and the heat exchange as much as possible is increased to the rear part, so that a heat exchange effect similar to countercurrent is formed. Experiments show that better heat exchange effect and descaling effect can be obtained by adopting the structural design.

Preferably, the same side (left side or right side) heat release tube groups are provided in plural numbers along the flow direction of the fluid in the fluid passage, and the pitch between adjacent heat release tube groups on the same side (left side or right side) is continuously decreased from the top down direction. The specific effect is similar to the effect of the previous pipe diameter change.

Preferably, the distance between the heat release pipe groups on the same side (left side or right side) is continuously increased by a continuously decreasing extent along the flow direction of the fluid in the fluid passage. The specific effect is similar to the effect of the previous pipe diameter change.

In experiments it was found that the volume, distance and volume of the upper left 21 and right 22 tubes and the collector box can have an influence on the heat exchanging efficiency and uniformity. If the volume of the heat collection box is too small, so that steam is overheated, heat cannot be timely transferred to the heat release pipe and the upper left pipe and the upper right pipe, the volume is too large, steam is too fast to condense and cannot be transferred, the volumes of the upper left pipe 21 and the upper right pipe 22 are suitable for volume collocation of the heat collection box, otherwise, the steam is too fast or too slow to condense, heat exchange condition is deteriorated, the distance between the upper left pipe 21 and the upper right pipe 22 is too poor, the distance is too small, the distribution of the heat release pipes is too dense, heat exchange efficiency is also influenced, the distance between the upper left pipe 21 and the upper right pipe 22 is also suitable for the volume collocation of the heat collection box, otherwise, the distance between the upper left pipe 21 and the upper right pipe 22 can influence the volume of accommodated liquid or steam, vibration on the free end is influenced, and heat exchange is influenced. The volumes of the upper left tube 21 and the upper right tube 22, the distance, and the volume of the heat collecting tank have a certain relationship.

The invention relates to an optimal size relation which is summarized by numerical simulation and test data of a plurality of heat pipes with different sizes. From the maximum heat exchange amount in the heat exchange effect, nearly 200 forms are calculated. The dimensional relationships are as follows:

Preferably, 0.72< (v1+v2)/V3 <0.85;

the distance between the center of the upper left tube 21 and the center of the upper right tube 22 is M, the tube diameter of the upper left tube 21 and the radius of the upper right tube 22 are the same, B is B, the radius of the axis of the innermost heat-emitting tube in the heat-emitting tubes is N1, and the radius of the axis of the outermost heat-emitting tube is W2, preferably 35< B <61mm;230< M <385mm;69< N1<121mm,119< W2<201mm.

Preferably, the number of the heat release tubes of the heat release tube group is 3 to 5, preferably 3 or 4.

Preferably, the arc between the ends of the free ends 3, 4 is 95-130 degrees, preferably 120 degrees, centered on the central axis of the left header. The free ends 5, 6 and the free ends 3, 4 have the same radian. By the design of the preferable included angle, the vibration of the free end is optimized, so that the heating efficiency is optimized.

Preferably, v1=v2.

The distance between the center of the upper left tube 21 and the center of the upper right tube 22 is M, the tube diameter of the upper left tube 21 and the radius of the upper right tube 22 are the same, the radius of the axis of the innermost heat-emitting tube in the heat-emitting tubes is N1, and the radius of the axis of the outermost heat-emitting tube is W2, and the volumes of the upper left tube 21, the upper right tube 22, the distance and the volume of the heat collection box are related through an optimized relation for the first time, so that the optimal dimensional relation is obtained. The above relation of the application is further improved aiming at the relation of the prior application, and the application belongs to the original application of the application through the relation of volume and included angles.

Preferably, the tube bundle of the heat release tube group 1 is an elastic tube bundle.

By providing the tube bundle of the heat release tube group 1 with an elastic tube bundle, the heat exchange coefficient can be further improved.

The heat release pipe group 1 is a plurality of heat release pipe groups 1 which are in parallel connection.

While the invention has been described in terms of preferred embodiments, the invention is not so limited. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention, and the scope of the invention should be assessed accordingly to that of the appended claims.

Claims

1. The portable remote loop heat pipe solar pressure difference descaling control method comprises a heat collecting device, wherein the heat collecting device comprises a reflector and a heat collecting pipe box, the heat collecting device comprises a heat collecting pipe box, an upper left pipe, an upper right pipe and a heat release pipe group which are positioned at the lower part, the upper left pipe and the upper right pipe are positioned at the upper part of the heat collecting pipe box, the heat release pipe group comprises a left heat release pipe group and a right heat release pipe group, the left heat release pipe group is communicated with the upper left pipe and the heat collecting pipe box, the right heat release pipe group is communicated with the upper right pipe and the heat collecting pipe box, so that the heat collecting pipe box, the upper left pipe, the upper right pipe and the heat release pipe group form heating fluid closed circulation, the heat release pipe groups are one or more, each heat release pipe group comprises a plurality of heat release pipes with circular arc shapes, the end parts of adjacent heat release pipes are communicated, the plurality of heat release pipes form a serial structure, and the end parts of the heat release pipes form free ends of the heat release pipes; the heat collecting pipe box comprises a first pipe orifice and a second pipe orifice, wherein the first pipe orifice is connected with an inlet of a left heat release pipe group, the second pipe orifice is connected with an inlet of a right heat release pipe group, an outlet of the left heat release pipe group is connected with a left upper pipe, and an outlet of the right heat release pipe group is connected with a right upper pipe;

The heat collection device comprises a descaling stage, and the heat collection device operates in the following manner in the descaling stage:

the pressure detection element is arranged in the heat collection device and used for detecting the pressure in the heat collection device, the controller extracts pressure data according to time sequence, the pressure difference or the accumulation of pressure difference change is obtained through comparison of the pressure data of adjacent time periods, the controller is connected with the cloud server, the cloud server is connected with the client, the controller transmits the pressure difference or the accumulation of pressure difference change to the cloud server and then transmits the pressure difference or the accumulation of pressure difference change to the client through the cloud server, the client is a mobile phone, an APP program is installed on the mobile phone, a user can select an automatic control or manual control working mode at the client, and the controller controls the heat collection of the heat collection device according to the working mode selected by the control client; in the automatic control working mode, when the pressure difference or the accumulation of the pressure difference changes is lower than a threshold value, the controller controls whether to collect heat of the heat collection tube box according to the detected pressure difference.

2. The method of claim 1, wherein in the manual control mode, the user obtains the pressure difference or the accumulated data of the pressure difference change according to the client, manually inputs a control signal at the client, and then transmits the control signal to the central controller through the cloud server, and the central controller controls whether to collect heat from the heat collecting pipe box according to the signal input by the client.

3. The method of claim 1, wherein in the automatically controlled operation mode, if the pressure in the preceding period is P1, the pressure in the adjacent following period is P2, and if P1< P2 is lower than the threshold value, the controller controls the heat collection pipe box to stop collecting heat; if P1> P2, when the threshold value is lower, the controller controls the heat collection of the heat collection pipe box.