Nitrogen making machine with heat energy recovery function

Abstract

The nitrogen making machine with the heat energy recovery function comprises a nitrogen making machine body, a water tank, a heat exchange coil pipe, an oxygen discharging pipeline and a three-way control valve, one end of the oxygen discharging pipeline is connected with the air inlet end of the three-way control valve, and the two air discharging ends of the three-way control valve are connected with the heat exchange coil pipe through air conveying pipelines respectively. The heat exchange coil pipe is mounted in the water tank; high-temperature oxygen generated by the nitrogen making machine body enters the oxygen discharging pipeline, enters the heat exchange coil in one water tank through the three-way control valve, exchanges heat with water in the water tank through the heat exchange coil, heats the water in the water tank, cools the high-temperature oxygen at the same time, monitors the temperature of water in the water tank through the temperature sensor, and controls the temperature of the water in the water tank through the three-way control valve. When the water temperature reaches a threshold value, the single-chip microcomputer controls the three-way control valve to enable the water to enter the heat exchange coil in the other water tank, alternate heat exchange is achieved, it is guaranteed that high-temperature oxygen in the oxygen discharging pipeline is continuously cooled, and therefore continuous production of the nitrogen making machine body is matched.

Description

Technical Field

[0001] The utility model relates to the field of nitrogen generators, in particular to a nitrogen generator with a heat energy recovery function. Background Art

[0002] A nitrogen generator is a device used to separate nitrogen from the air. Its working principle is mainly based on pressure swing adsorption (PSA) technology, using specific adsorbents (such as high-quality carbon molecular sieves) to selectively adsorb oxygen and nitrogen in the air, thereby achieving the separation of nitrogen and oxygen; after the oxygen is separated by the nitrogen generator, it needs to be cooled due to its high temperature. Otherwise, the high-temperature oxygen is very dangerous in the factory. At present, it is usually necessary to equip it with a cooling device to cool it. However, the additional configuration of the cooling device not only increases energy consumption, but also fails to recover the heat energy in the oxygen, resulting in a certain degree of energy waste. Therefore, providing a nitrogen generator with heat recovery function has become an urgent problem to be solved. Utility Model Content

[0003] 1. Technical issues to be resolved

[0004] In order to solve the above problems in the prior art, the utility model provides a nitrogen generator with a heat energy recovery function.

[0005] (II) Technical solution

[0006] In order to achieve the above-mentioned purpose, the main technical solutions adopted by the utility model include:

[0007] A nitrogen generator with heat recovery function, comprising a nitrogen generator body, a water tank, a heat exchange coil, an oxygen exhaust pipeline and a three-way control valve;

[0008] The oxygen exhaust port of the nitrogen generator body is connected to the oxygen exhaust pipeline;

[0009] The other end of the oxygen exhaust pipeline is connected to the air inlet end of the three-way control valve;

[0010] The two exhaust ends of the three-way control valve are respectively connected to the heat exchange coil through gas pipelines;

[0011] The heat exchange coil is installed inside the water tank;

[0012] A temperature sensor is installed inside the water tank;

[0013] The three-way control valve and the temperature sensor are both electrically connected to the single chip microcomputer.

[0014] Preferably, the heat exchange coil includes a first tube body and a second tube body, the first tube body and the second tube body are both spiral, and the first tube body is arranged in the second tube body, the air inlet end of the first tube body is connected to the exhaust end of the second tube body, the air inlet end of the second tube body is connected to the gas pipeline, and the exhaust end of the first tube body extends outside the water tank.

[0015] Preferably, the first tube body and the second tube body are both flat tube structures.

[0016] Preferably, it further comprises a water replenishment mechanism, wherein the water replenishment mechanism comprises a water inlet pipe, a drain pipe and a liquid level sensor;

[0017] The water inlet pipe and the drain pipe are connected to the water tank respectively, and control valves are installed on the water inlet pipe and the drain pipe. The control valves on the water inlet pipe and the drain pipe and the liquid level sensor are electrically connected to the single chip microcomputer.

[0018] Preferably, it also includes a hot water diverter, the hot water diverter is connected to the drainage pipe of the water tank, and the hot water diverter is connected to multiple water users.

[0019] (III) Beneficial effects

[0020] The beneficial effect of the utility model is that: by adopting the above technical scheme, the high-temperature oxygen generated by the nitrogen generator body enters the oxygen exhaust pipe, and enters the heat exchange coil in one of the water tanks through the three-way control valve, and exchanges heat with the water in the water tank through the heat exchange coil. While heating the water in the water tank, the high-temperature oxygen is cooled down, and the water temperature in the water tank is monitored by the temperature sensor. When the water temperature reaches the threshold, the single-chip microcomputer controls the three-way control valve to make it enter the heat exchange coil in another water tank, realizing alternating heat exchange, ensuring that the high-temperature oxygen in the oxygen exhaust pipe is continuously cooled down, thereby cooperating with the continuous production of the nitrogen generator body. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a nitrogen generator with heat energy recovery function;

[0022] Figure 2 It is a schematic diagram of the structure of the heat exchange coil.

[0023] Description of reference numerals:

[0024] 1. Nitrogen generator body;

[0025] 2. Oxygen exhaust pipe;

[0026] 3. Three-way control valve;

[0027] 4. Gas pipeline;

[0028] 5. Water tank;

[0029] 6. heat exchange coil; 61. first tube body; 62. second tube body;

[0030] 7. Hot water diverter;

[0031] 8. Water user. DETAILED DESCRIPTION

[0032] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0033] Please refer to Figure 1 to Figure 2 The utility model provides a nitrogen generator with heat recovery function, including a nitrogen generator body 1, a water tank 5, a heat exchange coil 6, an oxygen exhaust pipe 2 and a three-way control valve 3;

[0034] The oxygen exhaust port of the nitrogen generator body 1 is connected to the oxygen exhaust pipeline 2;

[0035] The other end of the oxygen exhaust pipe 2 is connected to the air inlet end of the three-way control valve 3;

[0036] The two exhaust ends of the three-way control valve 3 are respectively connected to the heat exchange coil 6 through the gas pipeline 4;

[0037] The heat exchange coil 6 is installed inside the water tank 5;

[0038] A temperature sensor is installed inside the water tank 5;

[0039] The three-way control valve 3 and the temperature sensor are both electrically connected to the single chip microcomputer;

[0040] When in use, the high-temperature oxygen generated by the nitrogen generator body 1 enters the oxygen exhaust pipe 2, and enters the heat exchange coil 6 in one of the water tanks 5 through the three-way control valve 3. Heat exchange is performed with the water in the water tank 5 through the heat exchange coil 6. While the water in the water tank 5 is heated, the high-temperature oxygen is cooled. The water temperature in the water tank 5 is monitored by the temperature sensor. When the water temperature reaches the threshold, the single-chip microcomputer controls the three-way control valve 3 to allow it to enter the heat exchange coil 6 in the other water tank 5, realizing alternating heat exchange, ensuring that the high-temperature oxygen in the oxygen exhaust pipe 2 is continuously cooled, thereby cooperating with the continuous production of the nitrogen generator body 1.

[0041] In this embodiment, the heat exchange coil 6 includes a first tube body 61 and a second tube body 62, both of which are spiral, and the first tube body 61 is arranged in the second tube body 62, the air inlet end of the first tube body 61 is connected to the exhaust end of the second tube body 62, the air inlet end of the second tube body 62 is connected to the gas pipeline 4, and the exhaust end of the first tube body 61 extends to the outside of the water tank 5;

[0042] High-temperature oxygen first enters from the air inlet end of the second tube body 62 and then is discharged from the exhaust end of the first tube body 61. Therefore, the heating temperature of the second tube body 62 is greater than the heating temperature of the first tube body 61, so that the second tube body 62 has the function of heating the first tube body 61, thereby improving the heat exchange efficiency with the water in the water tank 5.

[0043] In this embodiment, the first tube body 61 and the second tube body 62 are both flat tube structures, which greatly increases the flow rate of high-temperature oxygen and improves the efficiency of heat exchange.

[0044] In this embodiment, a water replenishment mechanism is also included, and the water replenishment mechanism includes a water inlet pipe, a drain pipe and a liquid level sensor;

[0045] The water inlet pipe and the drain pipe are connected to the water tank 5 respectively, and control valves are installed on the water inlet pipe and the drain pipe. The control valves and liquid level sensors on the water inlet pipe and the drain pipe are electrically connected to the single chip microcomputer;

[0046] The water level in the water tank 5 is monitored by a liquid level sensor, and when the water in the water tank 5 is drained, water is replenished through the water inlet pipe.

[0047] In this embodiment, a hot water diverter 7 is also included. The hot water diverter 7 is connected to the drainage pipe of the water tank 5. The hot water diverter 7 is connected to multiple water users 8. The hot water in the water tank 5 is transported to each water user 8 through the hot water diverter 7.

[0048] The working principle of the utility model is as follows:

[0049] The high-temperature oxygen generated by the nitrogen generator body 1 enters the oxygen exhaust pipe 2, and enters the heat exchange coil 6 in one of the water tanks 5 through the three-way control valve 3. The heat exchange coil 6 exchanges heat with the water in the water tank 5. While the water in the water tank 5 is heated, the high-temperature oxygen is cooled. The water temperature in the water tank 5 is monitored by the temperature sensor. When the water temperature reaches the threshold, the single-chip microcomputer controls the three-way control valve 3 to enter the heat exchange coil 6 in the other water tank 5, realizing alternating heat exchange, ensuring that the high-temperature oxygen in the oxygen exhaust pipe 2 is continuously cooled, thereby cooperating with the continuous production of the nitrogen generator body 1.

[0050] The circuits, electronic components and modules involved are all prior art and can be fully implemented by those skilled in the art. Needless to say, the content protected by this utility model does not involve improvements to software and methods.

[0051] The above are only embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

[0052] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A nitrogen generator with heat recovery function, characterized in that: It includes the nitrogen generator body, water tank, heat exchange coil, oxygen exhaust pipe and three-way control valve; The oxygen exhaust port of the nitrogen generator body is connected to the oxygen exhaust pipeline; The other end of the oxygen exhaust pipeline is connected to the air inlet end of the three-way control valve; The two exhaust ends of the three-way control valve are respectively connected to the heat exchange coil through gas pipelines; The heat exchange coil is installed inside the water tank; A temperature sensor is installed inside the water tank; The three-way control valve and the temperature sensor are both electrically connected to the single chip microcomputer.

2. A nitrogen generator with heat recovery function according to claim 1, characterized in that: The heat exchange coil includes a first tube body and a second tube body, both of which are spiral, and the first tube body is arranged in the second tube body, the air inlet end of the first tube body is connected to the exhaust end of the second tube body, the air inlet end of the second tube body is connected to the gas pipeline, and the exhaust end of the first tube body extends outside the water tank.

3. A nitrogen generator with heat recovery function according to claim 2, characterized in that: The first tube body and the second tube body are both flat tube structures.

4. The nitrogen generator with heat recovery function according to claim 1, characterized in that: It also includes a water replenishment mechanism, which includes a water inlet pipe, a drain pipe and a liquid level sensor; The water inlet pipe and the drain pipe are connected to the water tank respectively, and control valves are installed on the water inlet pipe and the drain pipe. The control valves on the water inlet pipe and the drain pipe and the liquid level sensor are electrically connected to the single chip microcomputer.

5. The nitrogen generator with heat recovery function according to claim 4, characterized in that: It also includes a hot water diverter, which is connected to a drain pipe of the water tank and connected to a plurality of water users.

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