Simple filling device and filling method for mixed working fluid of variable heat conduction pipe

Abstract

The present invention provides a simple filling device for a variable heat transfer pipe mixed working fluid, including an ammonia storage container, a pressure reducing valve, a filling pipeline, a pipeline heater, a one-way check valve and a pressure gauge. The pipeline of the ammonia storage container is connected to one end of the filling pipeline, and the other end of the filling pipeline is used to connect the variable heat transfer pipe to be filled. The pressure reducing valve is arranged at one end of the filling pipeline, and the one-way check valve is arranged in the filling pipeline for allowing the ammonia in the ammonia storage container to flow from one end of the filling pipeline to the other end of the filling pipeline in one direction. The pipeline heater is arranged outside the filling pipeline for heating the filling pipeline, and the pressure gauge is arranged in the middle or the other end of the filling pipeline. A related filling method is also provided. The filling device of the present invention can realize the accurate filling of the mixed working fluid of liquid ammonia and non-condensable gas in the variable heat transfer pipe under conventional equipment conditions, so that the accurate filling of the mixed working fluid is easy to achieve, the design is ingenious, the structure is simple, the manufacturing is simple, the cost is low, and it is suitable for large-scale promotion and application.

Description

Technical Field

[0001] The invention relates to the technical field of heat pipes, in particular to the technical field of heat pipe working fluid filling, and specifically refers to a simple filling device and a filling method for a variable heat conduction pipe mixed working fluid. Background Art

[0002] The working temperature of ordinary heat pipes is determined by the conditions of heat source and heat sink, so changing the heat load or the temperature of the evaporation section will cause the working temperature of the heat pipe to change. For ordinary heat pipes, the thermal conductivity is very high, but close to a constant. However, in some applications, the temperature of the condensation section (or evaporation section) needs to remain unchanged as the heat load changes, which is not possible for ordinary heat pipes with thermal conductivity close to a constant, so variable heat pipes are produced.

[0003] The simplest variable heat pipe without feedback control is to add a gas storage chamber to an ordinary heat pipe, and the gas storage chamber and the ordinary heat pipe are connected by a liquid wick. The variable heat pipe is filled with a heat transfer medium and another non-condensable gas medium.

[0004] The present invention is mainly aimed at variable heat pipes with ammonia as heat transfer medium, and another medium in the variable heat pipe is a non-condensable gas (generally nitrogen, argon, etc.). The general conventional filling method is to first fill a gas medium with a conventional method, then create a low-temperature environment, so that both mediums are liquefied into a liquid state, and then fill another medium (when filling the second gas medium, both need to be kept in a low-temperature liquid state), so that the amount filled can be accurately controlled. This filling method requires the creation of extremely low temperature conditions (generally below -40°C), which are not available in general laboratories or factories.

[0005] Therefore, it is necessary to provide a simple filling device for the mixed working fluid of the variable heat conduction pipe, which can realize the accurate filling of the mixed working fluid of liquid ammonia and non-condensable gas in the variable heat conduction pipe under conventional equipment conditions, making it easy to realize accurate filling of the mixed working fluid. Summary of the invention

[0006] In order to overcome the shortcomings of the above-mentioned prior art, one object of the present invention is to provide a simple filling device for a variable heat conduction pipe mixed working fluid, which can realize accurate filling of a mixed working fluid of liquid ammonia and non-condensable gas in the variable heat conduction pipe under conventional equipment conditions, making it easy to accurately fill the mixed working fluid and suitable for large-scale promotion and application.

[0007] Another object of the present invention is to provide a simple filling device for a variable heat conduction pipe mixed working medium, which has an ingenious design, a simple structure, is easy to manufacture, has a low cost, and is suitable for large-scale promotion and application.

[0008] Another object of the present invention is to provide a simple method for filling a variable heat conduction pipe mixed working fluid, which can realize accurate filling of the mixed working fluid of liquid ammonia and non-condensable gas in the variable heat conduction pipe under conventional equipment conditions, making accurate filling of the mixed working fluid easy to achieve and suitable for large-scale promotion and application.

[0009] Another object of the present invention is to provide a simple method for filling a variable heat conduction pipe with a mixed working fluid, which has an ingenious design, is easy to operate, has a low operating cost, and is suitable for large-scale promotion and application.

[0010] To achieve the above objectives, in a first aspect of the present invention, a simple filling device for a variable heat conduction pipe mixed working fluid is provided, which is characterized in that it includes an ammonia storage container, a pressure reducing valve, a filling pipeline, a pipeline heater, a one-way check valve and a pressure gauge, the ammonia storage container pipeline is connected to one end of the filling pipeline, and the other end of the filling pipeline is used to connect the variable heat conduction pipe to be filled, the pressure reducing valve is arranged at one end of the filling pipeline, the one-way check valve is arranged in the filling pipeline for allowing the ammonia in the ammonia storage container to flow unidirectionally from one end of the filling pipeline to the other end of the filling pipeline, the pipeline heater is arranged outside the filling pipeline for heating the filling pipeline, and the pressure gauge is arranged in the middle of the filling pipeline or at the other end of the filling pipeline.

[0011] Preferably, the simple filling device for the variable heat conductivity pipe mixed working fluid further comprises a container joint, and the ammonia storage container is connected to one end of the filling pipeline via the container joint pipeline.

[0012] More preferably, the ammonia storage container is an ammonia storage cylinder, and the container connector is a cylinder connector.

[0013] Preferably, the simple filling device for the variable heat conductivity pipe mixed working fluid also includes a heat pipe connector, which is arranged at the other end of the filling pipeline, and the other end of the filling pipeline is used to indirectly connect the variable heat conductivity pipe to be filled through the heat pipe connector.

[0014] Preferably, the simple filling device for the variable heat conduction pipe mixed working fluid also includes a first on-off stop valve, a second on-off stop valve, a third on-off stop valve and an exhaust bypass, the first on-off stop valve is arranged at one end of the filling pipeline, the second on-off stop valve is arranged at the other end of the filling pipeline, the pressure gauge is located between the first on-off stop valve and the second on-off stop valve, the exhaust bypass pipeline is connected to the middle part of the filling pipeline, and the third on-off stop valve is arranged in the exhaust bypass.

[0015] Preferably, the pipeline heater is an electric pipeline heater.

[0016] In a second aspect of the present invention, a simple filling method for a variable heat conduction pipe mixed working fluid is provided, wherein the simple filling method for a variable heat conduction pipe mixed working fluid is performed using the simple filling device for a variable heat conduction pipe mixed working fluid, and the simple filling method for a variable heat conduction pipe mixed working fluid comprises the following steps:

[0017] (1) connecting the other end of the filling pipeline to the variable heat conductivity pipe to be filled, wherein the variable heat conductivity pipe to be filled is pre-filled with a certain amount of non-condensable gas;

[0018] (2) adjusting the pressure of the pressure reducing valve to a first pressure value;

[0019] (3) After the pressure of the pressure gauge stabilizes to the first pressure value, the pressure reducing valve is closed, and the pipeline heater is turned on to heat the temperature of the filling pipeline to the expected temperature value, thereby ensuring that the ammonia pressure in the filling pipeline is the first expected pressure value;

[0020] (4) When the pressure of the pressure gauge drops to a second expected pressure value, the filling is stopped, and the mass of ammonia gas filled into the variable heat conduction pipe to be filled is calculated according to the difference between the first expected pressure value and the second expected pressure value and the volume of the filling pipeline.

[0021] Preferably, the simple filling device for the variable heat conduction pipe mixed working fluid further comprises a heat pipe connector, which is arranged at the other end of the filling pipeline, and the other end of the filling pipeline is indirectly connected to the variable heat conduction pipe to be filled through the heat pipe connector;

[0022] In the step (1), the heat pipe connector is connected to the variable heat conduction pipe to be filled, so that the other end of the filling pipeline is indirectly connected to the variable heat conduction pipe to be filled through the heat pipe connector.

[0023] Preferably, the simple filling device for the variable heat conduction pipe mixed working medium further comprises a first on-off stop valve, a second on-off stop valve, a third on-off stop valve and an exhaust bypass, wherein the first on-off stop valve is arranged at one end of the filling pipeline, the second on-off stop valve is arranged at the other end of the filling pipeline, the exhaust bypass pipeline is connected to the middle part of the filling pipeline, and the third on-off stop valve is arranged in the exhaust bypass;

[0024] Between step (1) and step (2), the simple method for filling the variable heat conduction pipe mixed working medium further includes the following steps: (11) closing the first on-off stop valve, the second on-off stop valve and the third on-off stop valve;

[0025] Between step (2) and step (3), the simple filling method of the variable heat conduction pipe mixed working medium further includes the following steps: (12) opening the first on-off stop valve to keep the pressure reducing valve stable; (13) opening the third on-off stop valve to exhaust the air in the filling pipeline, and then closing the third on-off stop valve;

[0026] Between step (3) and step (4), the simple method for filling the variable heat conduction pipe with mixed working fluid further includes the following steps: (14) opening the second on-off stop valve;

[0027] In the step (4), the filling is stopped by closing the second on-off stop valve.

[0028] More preferably, in step (13), the third on-off stop valve is opened for 30 seconds to 60 seconds.

[0029] Preferably, in the step (1), the variable heat conductivity pipe to be filled is pre-filled with the non-condensable gas by conventional filling equipment.

[0030] Preferably, in step (1), the non-condensable gas is nitrogen or argon.

[0031] Preferably, in step (2), the first pressure value is 1 MPa.

[0032] Preferably, in step (3), the expected temperature is 30°C to 60°C.

[0033] The beneficial effects of the present invention are mainly:

[0034] 1. The simple filling device of the variable heat conduction pipe mixed working medium of the present invention comprises an ammonia storage container, a pressure reducing valve, a filling pipeline, a pipeline heater, a one-way check valve and a pressure gauge. The pipeline of the ammonia storage container is connected to one end of the filling pipeline, and the other end of the filling pipeline is used to connect the variable heat conduction pipe to be filled. The pressure reducing valve is arranged at one end of the filling pipeline, and the one-way check valve is arranged in the filling pipeline to make the ammonia in the ammonia storage container flow from one end of the filling pipeline to the other end of the filling pipeline in one direction. The pipeline heater is arranged outside the filling pipeline to heat the filling pipeline, and the pressure gauge is arranged in the middle or the other end of the filling pipeline. When in use, the variable heat conduction pipe to be filled is pre-filled with a certain amount of non-condensable gas, and then the other end of the filling pipeline is filled. The first end is connected to the variable heat-conducting pipe to be filled; the pressure of the pressure reducing valve is adjusted to a first pressure value; when the pressure of the pressure gauge is stabilized to the first pressure value, the pressure reducing valve is closed, and the pipeline heater is turned on to heat the temperature of the filling pipeline to the expected temperature value, thereby ensuring that the ammonia pressure in the filling pipeline is the first expected pressure value; when the pressure of the pressure gauge drops to the second expected pressure value, the filling is stopped, and the mass of ammonia filled in the variable heat-conducting pipe to be filled is calculated according to the difference between the first expected pressure value and the second expected pressure value and the volume of the filling pipeline. Therefore, it can realize the accurate filling of the mixed working medium of liquid ammonia and non-condensable gas in the variable heat-conducting pipe under conventional equipment conditions, so that the accurate filling of the mixed working medium is easy to achieve, and is suitable for large-scale promotion and application.

[0035] 2. The simple filling device for the variable heat conduction pipe mixed working fluid of the present invention comprises an ammonia storage container, a pressure reducing valve, a filling pipeline, a pipeline heater, a one-way check valve and a pressure gauge. The pipeline of the ammonia storage container is connected to one end of the filling pipeline, and the other end of the filling pipeline is used to connect the variable heat conduction pipe to be filled. The pressure reducing valve is arranged at one end of the filling pipeline, and the one-way check valve is arranged in the filling pipeline to allow the ammonia in the ammonia storage container to flow from one end of the filling pipeline to the other end of the filling pipeline in one direction. The pipeline heater is arranged outside the filling pipeline to heat the filling pipeline, and the pressure gauge is arranged in the middle or the other end of the filling pipeline. Therefore, it has ingenious design, simple structure, simple manufacturing, low cost, and is suitable for large-scale promotion and application.

[0036] 3. The simple filling method of the variable heat conductive pipe mixed working fluid of the present invention comprises: (1) connecting the other end of the filling pipeline to the variable heat conductive pipe to be filled, and the variable heat conductive pipe to be filled is pre-filled with a certain amount of non-condensable gas; (2) adjusting the pressure of the pressure reducing valve to a first pressure value; (3) when the pressure of the pressure gauge stabilizes to the first pressure value, closing the pressure reducing valve, and turning on the pipeline heater to heat the temperature of the filling pipeline to the expected temperature value, thereby ensuring that the ammonia pressure in the filling pipeline is the first expected pressure value; (4) when the pressure of the pressure gauge drops to the second expected pressure value, stopping the filling, and calculating the mass of ammonia filled in the variable heat conductive pipe to be filled according to the difference between the first expected pressure value and the second expected pressure value and the volume of the filling pipeline. Therefore, it can realize the accurate filling of the mixed working fluid of liquid ammonia and non-condensable gas in the variable heat conductive pipe under conventional equipment conditions, making it easy to realize accurate filling of the mixed working fluid, which is suitable for large-scale promotion and application.

[0037] 4. The simple filling method of the variable heat conduction pipe mixed working fluid of the present invention comprises: (1) connecting the other end of the filling pipeline to the variable heat conduction pipe to be filled, and the variable heat conduction pipe to be filled is pre-filled with a certain amount of non-condensable gas; (2) adjusting the pressure of the pressure reducing valve to a first pressure value; (3) when the pressure of the pressure gauge stabilizes to the first pressure value, closing the pressure reducing valve, and turning on the pipeline heater to heat the temperature of the filling pipeline to an expected temperature value, thereby ensuring that the ammonia pressure in the filling pipeline is the first expected pressure value; (4) when the pressure of the pressure gauge drops to the second expected pressure value, stopping the filling, and calculating the mass of ammonia filled in the variable heat conduction pipe to be filled according to the difference between the first expected pressure value and the second expected pressure value and the volume of the filling pipeline. Therefore, the design is ingenious, the operation is simple, the operation cost is low, and it is suitable for large-scale promotion and application.

[0038] These and other objects, features and advantages of the present invention will be fully reflected in the following detailed description, drawings and claims, and may be achieved by the means, devices and combinations thereof particularly pointed out in the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a front perspective schematic diagram of a specific embodiment of a simple filling device for a variable heat conductive pipe mixed working medium of the present invention, which fills a variable heat conductive pipe to be filled.

[0040] (Explanation of symbols)

[0041] 1. Ammonia storage container; 2. Pressure reducing valve; 3. Filling pipeline; 4. Pipeline heater; 5. One-way check valve; 6. Variable heat conduction pipe to be filled; 7. Heat pipe; 8. Connecting pipe; 9. Gas storage chamber; 10. Container joint; 11. Heat pipe connector; 12. First on-off stop valve; 13. Second on-off stop valve; 14. Third on-off stop valve; 15. Exhaust bypass; 16. Pressure gauge. DETAILED DESCRIPTION

[0042] In order to more clearly understand the technical content of the present invention, the following embodiments are given in detail.

[0043] See also Figure 1 As shown, in a specific embodiment of the present invention, the simple filling device of the variable heat conduction pipe mixed working medium of the present invention comprises an ammonia storage container 1, a pressure reducing valve 2, a filling pipeline 3, a pipeline heater 4, a one-way check valve 5 and a pressure gauge 16, wherein the pipeline of the ammonia storage container 1 is connected to one end of the filling pipeline 3, and the other end of the filling pipeline 3 is used to connect the variable heat conduction pipe 6 to be filled (specifically, a heat pipe 7 connected to the variable heat conduction pipe 6 to be filled, the variable heat conduction pipe 6 to be filled comprises a heat pipe 7, a connecting pipe 8 and a gas storage chamber 9, the gas storage chamber 9 is connected to the heat pipe 7 through the connecting pipe 8, and a liquid wick is arranged in the connecting pipe 8 (not shown in the figure), the pressure reducing valve 2 is arranged at one end of the filling pipeline 3, the one-way check valve 5 is arranged in the filling pipeline 3 to allow the ammonia in the ammonia storage container 1 to flow unidirectionally from one end of the filling pipeline 3 to the other end of the filling pipeline 3, the pipeline heater 4 is arranged outside the filling pipeline 3 to heat the filling pipeline 3, and the pressure gauge 16 is arranged at the other end of the filling pipeline 3.

[0044] The pressure reducing valve 2 can control and adjust the gas pressure coming out of the ammonia storage container 1, and the one-way check valve 5 can ensure that the gas in the filling pipeline 3 can only flow from the high pressure at one end of the filling pipeline 3 to the low pressure at the other end of the filling pipeline 3, thereby ensuring that the non-condensable gas pre-filled in the variable heat conduction pipe 6 to be filled will not flow back. The pipeline heater 4 can heat the filling pipeline 3 to the required temperature as required, thereby ensuring that the pressure in the filling pipeline 3 is stable at the required pressure. Because the pressure of ammonia changes exponentially with the change of temperature.

[0045] The pressure gauge 16 is used to monitor the gas pressure in the filling pipeline 3. Obviously, the pressure gauge 16 can also be arranged in the middle of the filling pipeline 3, which can also achieve the purpose of the present invention.

[0046] The end of the ammonia storage container 1 pipeline connected to the filling pipeline 3 can adopt any suitable structure, see Figure 1 As shown, in a specific embodiment of the present invention, the simple filling device for the variable heat conductivity pipe mixed working fluid also includes a container joint 10, and the ammonia storage container 1 is connected to one end of the filling pipeline 3 through the container joint 10 pipeline.

[0047] The ammonia storage container 1 can be any suitable ammonia storage container, and the container connector 10 can be any suitable container connector. In a specific embodiment of the present invention, the ammonia storage container 1 is an ammonia storage cylinder, and the container connector 10 is a cylinder connector.

[0048] The other end of the filling pipeline 3 is used to connect the variable heat conduction pipe 6 to be filled and can adopt any suitable structure. Figure 1 As shown, in a specific embodiment of the present invention, the simple filling device for the variable heat conductivity pipe mixed working fluid also includes a heat pipe connector 11, and the heat pipe connector 11 is arranged at the other end of the filling pipeline 3, and the other end of the filling pipeline 3 is used to indirectly connect the variable heat conductivity pipe 6 to be filled through the heat pipe connector 11.

[0049] In order to facilitate the exhaust of the filling pipeline 3 and control the filling process, see Figure 1 As shown, in a specific embodiment of the present invention, the simple filling device for the variable heat conduction pipe mixed working fluid also includes a first on-off stop valve 12, a second on-off stop valve 13, a third on-off stop valve 14 and an exhaust bypass 15, the first on-off stop valve 12 is arranged at one end of the filling pipeline 3, the second on-off stop valve 13 is arranged at the other end of the filling pipeline 3, the pressure gauge 16 is located between the first on-off stop valve 12 and the second on-off stop valve 13, the exhaust bypass 15 pipeline is connected to the middle part of the filling pipeline 3, and the third on-off stop valve 14 is arranged in the exhaust bypass 15.

[0050] The third on-off stop valve 14 is used to exhaust the air in the filling pipeline 3, and preferably has a high-pressure protection and automatic pressure relief function to protect the filling pipeline 3 from overpressure.

[0051] The pipeline heater 4 can be any suitable pipeline heater. In a specific embodiment of the present invention, the pipeline heater 4 is an electric pipeline heater.

[0052] The simple filling method of the variable heat conduction pipe mixed working fluid using the simple filling device of the variable heat conduction pipe mixed working fluid comprises the following steps:

[0053] (1) connecting the other end of the filling pipeline 3 to the variable heat conduction pipe 6 to be filled (specifically, the heat pipe 7 connected to the variable heat conduction pipe 6 to be filled), wherein the variable heat conduction pipe 6 to be filled is pre-filled with a certain amount of non-condensable gas;

[0054] (2) adjusting the pressure of the pressure reducing valve 2 to a first pressure value;

[0055] (3) When the pressure of the pressure gauge 16 stabilizes to the first pressure value, the pressure reducing valve 2 is closed, and the pipeline heater 4 is turned on to heat the temperature of the filling pipeline 3 to the expected temperature value (i.e., the temperature required for the above calculation), thereby ensuring that the ammonia pressure in the filling pipeline 3 is the first expected pressure value (i.e., the pressure required for the above calculation);

[0056] It is necessary to ensure that the gas pressure in the filling pipeline 3 is greater than the pressure of the non-condensable gas to be filled in the variable heat conduction pipe 6. Moreover, when the ammonia gas is filled at a stable pressure and a stable volume, the quality of the filled ammonia gas can be guaranteed.

[0057] (4) When the pressure of the pressure gauge 16 drops to a second expected pressure value, the filling is stopped, and the mass of ammonia gas filled into the variable heat conduction pipe 6 to be filled is calculated based on the difference between the first expected pressure value and the second expected pressure value and the volume of the filling pipeline 3.

[0058] According to the ideal gas state equation PV = mRT / M, where P is the gas pressure; V is the gas volume, i.e., the volume of the filling pipeline 3; M is the molar mass of the gas; T is the system temperature; and R is the gas constant (proportional constant). △m is the theoretical required mass for filling, and the second pressure expectation value is calculated based on the required filling mass to obtain P2 = (P1VM / RT1-△m)RT2 / (MV).

[0059] The actual filling mass is obtained by weighing the variable heat conductive tube 6 to be filled before and after being filled with ammonia, and the actual error is obtained by comparing it with the theoretical filling required mass. The actual multiple filling results show that the error can be controlled within ±0.1g.

[0060] In the step (1), any suitable structure may be used to connect the other end of the filling pipeline 3 to the variable heat conductive pipe 6 to be filled. In a specific embodiment of the present invention, when the simple filling device for the variable heat conductive pipe mixed working fluid further includes a heat pipe connector 11, in the step (1), the heat pipe connector 11 is connected to the variable heat conductive pipe 6 to be filled, so that the other end of the filling pipeline 3 is indirectly connected to the variable heat conductive pipe 6 to be filled through the heat pipe connector 11.

[0061] In order to discharge the original air in the charging pipeline 3, in a specific embodiment of the present invention, when the simple charging device for the variable heat conduction pipe mixed working medium further includes a first on-off stop valve 12, a second on-off stop valve 13, a third on-off stop valve 14 and an exhaust bypass 15,

[0062] Between step (1) and step (2), the simple method for filling the variable heat conduction pipe mixed working medium further includes the following steps: (11) closing the first on-off stop valve 12, the second on-off stop valve 13 and the third on-off stop valve 14;

[0063] Between step (2) and step (3), the simple filling method of the variable heat conduction pipe mixed working medium further comprises the following steps: (12) opening the first on-off stop valve 12 to keep the pressure reducing valve 2 stable; (13) opening the third on-off stop valve 14 to exhaust the air in the filling pipeline 3, and then closing the third on-off stop valve 14;

[0064] Between step (3) and step (4), the simple filling method of the variable heat conduction pipe mixed working fluid also includes the following steps: (14) opening the second on-off stop valve 13; at this time, because of the one-way check valve 5, the non-condensable gas pre-filled in the variable heat conduction pipe 6 to be filled will not flow out, and the ammonia in the filling pipeline 3 will flow into the variable heat conduction pipe 6 to be filled in a unidirectional manner.

[0065] In the step (4), the filling is stopped by closing the second on-off stop valve 13 .

[0066] In the step (13), the time for which the third on-off stop valve 14 is opened can be determined as required. More preferably, in the step (13), the time for which the third on-off stop valve 14 is opened is 30 seconds to 60 seconds. In a specific embodiment of the present invention, in the step (13), the time for which the third on-off stop valve 14 is opened is 45 seconds.

[0067] In the step (1), the variable heat-conducting pipe 6 to be filled is pre-filled with a certain amount of non-condensable gas, which can be carried out by any suitable equipment. In a specific embodiment of the present invention, in the step (1), the variable heat-conducting pipe 6 to be filled is pre-filled with the non-condensable gas by a conventional filling device. The conventional filling device can be, for example, a FC-type refrigerant filling machine of Qingdao Green Ring Industrial Equipment Co., Ltd., an MDR-type refrigerant injection machine of Beijing Meiderui Technology, etc.

[0068] In the step (1), the non-condensable gas may be any suitable non-condensable gas. Preferably, in the step (1), the non-condensable gas is nitrogen or argon. In a specific embodiment of the present invention, the non-condensable gas is nitrogen.

[0069] In the step (2), the first pressure value can be determined as needed. Usually, the first pressure value is slightly higher than the saturated vapor pressure of ammonia corresponding to the external ambient temperature. In a specific embodiment of the present invention, in the step (2), the first pressure value is 1 MPa.

[0070] In the step (3), the expected temperature value can be determined as needed. Usually, the pressure of the first pressure value + 1MPa can be calculated first, and the saturated temperature of ammonia can be queried according to the saturated vapor pressure of ammonia under this pressure. The expected temperature value is slightly higher than the saturated temperature. Preferably, in the step (3), the expected temperature value is 30°C to 60°C. In a specific embodiment of the present invention, in the step (3), the expected temperature value is 45°C.

[0071] The present invention utilizes the physical property of ammonia (the characteristic that the pressure increases rapidly with the increase of temperature), combines the pressure reducing valve, one-way check valve, pressure gauge and other components, and realizes the accurate filling of the mixed working medium of liquid ammonia and non-condensable gas in the variable heat conduction pipe under the conditions of conventional equipment. Compared with the prior art, the present invention mainly has the following advantages:

[0072] 1. The variable heat conduction tube can be accurately charged with ammonia and non-condensable gas mixed gas without creating an extremely low temperature environment.

[0073] 2. The filling device and filling method of the present invention are simple and have high filling accuracy (filling accuracy is ±0.1g).

[0074] 3. The filling device of the present invention adopts conventional components, has low manufacturing cost and is easy to operate.

[0075] The above-mentioned pressure reducing valve, pipeline heater, cut-off valve, pressure gauge, etc. can also be organically integrated into an automatic control system through automatic control technology, combined with chip calculation, and transformed into a human-machine interface. The mass of ammonia to be filled can be directly input to achieve automatic one-key control.

[0076] In summary, the simple filling device for the variable heat conduction pipe mixed working fluid of the present invention can realize the accurate filling of the mixed working fluid of liquid ammonia and non-condensable gas in the variable heat conduction pipe under conventional equipment conditions, making it easy to realize accurate filling of the mixed working fluid. It has a clever design, a simple structure, simple manufacturing, low cost, and is suitable for large-scale promotion and application.

[0077] It can be seen that the purpose of the present invention has been completely and effectively achieved. The functional and structural principles of the present invention have been demonstrated and explained in the embodiments. Without departing from the principles, the implementation methods can be modified arbitrarily. Therefore, the present invention includes all modified implementation methods based on the spirit and scope of the claims.

Claims

1. A simple filling method for a variable heat conduction pipe mixed working fluid, characterized in that: The simple filling method of the variable heat conduction pipe mixed working medium is carried out by using a simple filling device of the variable heat conduction pipe mixed working medium, and the simple filling device of the variable heat conduction pipe mixed working medium comprises an ammonia storage container, a pressure reducing valve, a filling pipeline, a pipeline heater, a one-way check valve and a pressure gauge, the ammonia storage container pipeline is connected to one end of the filling pipeline, and the other end of the filling pipeline is used to connect the variable heat conduction pipe to be filled, the pressure reducing valve is arranged at one end of the filling pipeline, the one-way check valve is arranged in the filling pipeline to make the ammonia in the ammonia storage container flow from one end of the filling pipeline to the other end of the filling pipeline in one direction, the pipeline heater is arranged outside the filling pipeline to heat the filling pipeline, and the pressure gauge is arranged in the middle of the filling pipeline or at the other end of the filling pipeline. The simple filling method of the variable heat conduction pipe mixed working medium comprises the following steps: (1) connecting the other end of the filling pipeline to the variable heat conductivity pipe to be filled, wherein the variable heat conductivity pipe to be filled is pre-filled with a certain amount of non-condensable gas; (2) adjusting the pressure of the pressure reducing valve to a first pressure value; (3) After the pressure of the pressure gauge stabilizes to the first pressure value, the pressure reducing valve is closed, and the pipeline heater is turned on to heat the temperature of the filling pipeline to the expected temperature value, thereby ensuring that the ammonia pressure in the filling pipeline is the first expected pressure value; (4) When the pressure of the pressure gauge drops to a second expected pressure value, the filling is stopped, and the mass of ammonia gas filled into the variable heat conductive pipe to be filled is calculated according to the difference between the first expected pressure value and the second expected pressure value and the volume of the filling pipeline, wherein the first expected pressure value and the second expected pressure value are both greater than the pressure of the non-condensable gas in the variable heat conductive pipe to be filled.

2. The simple filling method of the variable heat conduction pipe mixed working fluid according to claim 1, characterized in that: The simple filling device for the variable heat conduction pipe mixed working medium further comprises a heat pipe connector, which is arranged at the other end of the filling pipeline, and the other end of the filling pipeline is used to indirectly connect the variable heat conduction pipe to be filled through the heat pipe connector; In the step (1), the heat pipe connector is connected to the variable heat conduction pipe to be filled, so that the other end of the filling pipeline is indirectly connected to the variable heat conduction pipe to be filled through the heat pipe connector.

3. The simple filling method of the variable heat conduction pipe mixed working fluid according to claim 1, characterized in that: The simple filling device for the variable heat conduction pipe mixed working medium further comprises a first on-off stop valve, a second on-off stop valve, a third on-off stop valve and an exhaust bypass, wherein the first on-off stop valve is arranged at one end of the filling pipeline, the second on-off stop valve is arranged at the other end of the filling pipeline, the exhaust bypass pipeline is connected to the middle part of the filling pipeline, and the third on-off stop valve is arranged in the exhaust bypass; Between step (1) and step (2), the simple method for filling the variable heat conduction pipe mixed working medium further includes the following steps: (11) closing the first on-off stop valve, the second on-off stop valve and the third on-off stop valve; Between step (2) and step (3), the simple filling method of the variable heat conduction pipe mixed working medium further includes the following steps: (12) opening the first on-off stop valve to keep the pressure reducing valve stable; (13) opening the third on-off stop valve to exhaust the air in the filling pipeline, and then closing the third on-off stop valve; Between step (3) and step (4), the simple method for filling the variable heat conduction pipe with mixed working fluid further includes the following steps: (14) opening the second on-off stop valve; In the step (4), the filling is stopped by closing the second on-off stop valve.

4. The simple filling method of the variable heat conduction pipe mixed working fluid according to claim 3, characterized in that: In step (13), the third on-off stop valve is opened for 30 seconds to 60 seconds.

5. The simple filling method of the variable heat conduction pipe mixed working fluid according to claim 1, characterized in that: In the step (1), the variable heat conductivity pipe to be filled is pre-filled with the non-condensable gas by conventional filling equipment.

6. The simple filling method of the variable heat conduction pipe mixed working fluid according to claim 1, characterized in that: In the step (1), the non-condensable gas is nitrogen or argon.

7. The simple filling method of the variable heat conduction pipe mixed working fluid according to claim 1, characterized in that: In the step (2), the first pressure value is 1 MPa.

8. The simple filling method of the variable heat conduction pipe mixed working fluid according to claim 1, characterized in that: In the step (3), the expected temperature is 30°C to 60°C.

Images