Constant-temperature gas supply system

Abstract

The utility model belongs to the technical field of air supply, and provides a constant-temperature air supply system, which comprises a compressed air source, a cooling water source, a first constant-temperature device, a second constant-temperature device, a heating device, an air supply pipeline, an air supply pipeline, an air supply pipeline and a water supply pipeline, the air storage tank is connected with the heating device, the terminal air supply pipeline is connected with the air storage tank, and the terminal air supply pipeline is communicated with the compressed air source through a direct supply pipeline. According to the utility model, gas is supplied through two paths of equipment (the first constant-temperature device and the second constant-temperature device) and the direct supply pipeline, so that the guarantee capability can be improved; the cooling water source is used in cooperation with the first constant temperature device, the second constant temperature device and the cooler, compared with a conventional cooling measure, the temperature of compressed air can be controlled within the temperature range required by production, and cooling can be controlled more finely.

Description

Technical Field

[0001] The utility model belongs to the technical field of air supply, and in particular relates to a constant temperature air supply system. Background Art

[0002] Compressed air is widely used in industry and scientific research. With the rapid development of science and technology, several high-tech industries are emerging. Many components, such as OLEDs (self-luminous liquid crystal displays), have extremely high requirements for their working environment. Moisture content, particle size, and number must be controlled within certain limits, necessitating advanced air purification in their production environments. Existing technologies typically compress the air and then purify and dry it. The temperature of the treated compressed air can reach up to 35°C, while the required temperature for LCD production is 23±1°C. Therefore, the compressed air needs to be cooled. However, due to the fluctuating temperature of compressed air, conventional cooling methods are difficult to maintain within the required production temperature range. Furthermore, failures in existing equipment can affect air supply, making them unsustainable. Utility Model Content

[0003] The purpose of the utility model is to provide a constant temperature air supply system to solve the technical problems existing in the prior art.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0005] A constant temperature air supply system, comprising a compressed air source and a cooling water source, a first thermostat and a second thermostat, both connected to the compressed air source and the cooling water source, a heating device connected to the first thermostat and the second thermostat via an air supply pipeline, an air storage tank connected to the heating device, a terminal air supply pipeline connected to the air storage tank, the terminal air supply pipeline being connected to the compressed air source via a direct supply pipeline; the cooling water source comprising a water-cooled condenser having a cooling water outlet pipe and a cooling water inlet pipe, a compressor and a drying filter connected to the water-cooled condenser, a water tank evaporator connected to the compressor and the drying filter, a float water replenishment valve, an overflow pipe, a water tank drain valve, a chilled water return pipe and a chilled water outlet pipe connected to the water tank evaporator, a bypass valve arranged between the chilled water return pipe and the chilled water outlet pipe, and a circulating pump arranged on the chilled water outlet pipe, the cooling water source being connected to the first thermostat and the second thermostat via the chilled water return pipe and the chilled water outlet pipe.

[0006] Furthermore, a high-pressure controller and a pressure gauge are provided between the water-cooled condenser and the compressor; and a low-pressure controller and a pressure gauge are provided between the compressor and the water tank evaporator.

[0007] Furthermore, the drying filter is connected to the water tank evaporator through a thermal expansion valve.

[0008] Furthermore, the water tank evaporator is also provided with a temperature sensor and a liquid level switch.

[0009] Furthermore, a water filter is provided on the chilled water return pipe, and a water pressure gauge and a check valve are provided on the chilled water outlet pipe.

[0010] Furthermore, a water flow switch is provided on the cooling water outlet pipe and / or the chilled water return pipe.

[0011] Furthermore, a water filter is provided on the chilled water return pipe, and a water pressure gauge is provided on the chilled water outlet pipe.

[0012] Furthermore, the first constant temperature device includes an air intake pipe, a water intake pipe and a cooler; the compressed air source is connected to the air supply pipeline through the air intake pipe, and the air intake pipe is sequentially provided with an air intake temperature sensor, an air intake pressure sensor and an air intake valve; the air intake valve is connected to the cooler through a pipeline, and the cooler is connected to the air supply pipeline.

[0013] Furthermore, the chilled water outlet pipe is connected to the water inlet pipe, the chilled water return pipe is connected to the outlet pipe, the water inlet pipe is connected to the outlet pipe, the cooler is connected to the outlet pipe, the outlet pipe is connected to a drain, and an outlet valve is provided on it.

[0014] Furthermore, the water inlet pipe is sequentially provided with a water inlet temperature sensor, a water inlet flow valve and a water inlet valve; the water inlet pipe enters the cooler after the water inlet valve, and is also connected to the drain outlet through a pipe after the cooler and a drain valve is provided on the pipe.

[0015] Furthermore, the gas storage tank is connected to a filter device corresponding to the first constant temperature device and the second constant temperature device; the gas storage tank is also connected to an air release pipeline, and the air release pipeline is provided with an air release valve and a muffler.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] (1) The utility model can improve the security capability by supplying gas through two devices (a first constant temperature device and a second constant temperature device) and a direct supply pipeline; the redundant backup can avoid downtime, and two filter devices corresponding to the first constant temperature device and the second constant temperature device are respectively provided after the gas storage tank, and at the same time, there are two identical branches, so even if one of them fails, it will not affect the gas supply; in addition, the redundant backup is provided with a direct gas supply pipeline, which does not require heating or cooling, and avoids the situation where there is no gas in the factory.

[0018] (2) The utility model adopts a cooling water source in conjunction with a first constant temperature device, a second constant temperature device and a cooler. The cooler operates continuously. Compared with conventional cooling measures, it can not only control the temperature of the compressed air within the temperature range required for production, but also can control the cooling more precisely. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structural principle of the utility model.

[0020] Figure 2 This is a schematic diagram of the structural principle of the cooling water source in the present utility model.

[0021] The names corresponding to the reference numerals are as follows: 1-compressed air source; 2-cooling water source; 3-first constant temperature device; 4-second constant temperature device; 5-direct supply pipeline; 6-air supply pipeline; 7-heating device; 71-first heating device; 8-air storage tank; 9-terminal air supply pipeline; 10-drain outlet;

[0022] 21 - Cooling water outlet pipe; 22 - Cooling water inlet pipe; 23 - Water-cooled condenser; 24 - Compressor; 25 - Filter drier; 26 - Water tank evaporator; 27 - Float water supply valve; 28 - Overflow pipe; 29 - Chilled water return pipe; 210 - Chilled water outlet pipe; 211 - Bypass valve; 212 - Circulating pump; 213 - High-pressure controller; 214 - Low-pressure controller; 215 - Thermal expansion valve; 216 - Water tank drain valve; 217 - Temperature sensor; 218 - Liquid level switch; 219 - Water flow switch; 220 - Water filter; 221 - Water pressure gauge; 222 - Check valve;

[0023] 31-Intake pipe; 32-Intake pipe inspection valve; 33-Intake air temperature sensor; 34-Intake air pressure sensor; 35-Intake valve; 36-Bypass valve; 37-Water inlet pipe; 38-Water inlet temperature sensor; 39-Water inlet inspection valve; 310-Water inlet flow valve; 311-Water inlet valve; 312-Water inlet circulation valve; 313-Cooler; 314-Drain valve; 315-Water outlet valve; 316-Water outlet pipe;

[0024] 81-Filter device; 82-Gas storage pressure sensor; 83-Air release pipe; 84-Air release valve; 85-Muffler. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to have a clearer understanding and knowledge of the present invention, the present invention is further described in detail below in conjunction with the embodiments. It should be noted that the specific embodiments described below are only used to explain the present invention and facilitate understanding. The technical solutions provided by the present invention are not limited to the technical solutions provided by the following embodiments, and the technical solutions provided by the embodiments should not limit the scope of protection of the present invention.

[0026] Example

[0027] like Figure 1 and 2 As shown, this embodiment provides a constant temperature air supply system, including a compressed air source and a cooling water source, a first constant temperature device and a second constant temperature device both connected to the compressed air source and the cooling water source, a heating device connected to the first constant temperature device and the second constant temperature device through an air supply pipeline, an air storage tank connected to the heating device, and a terminal air supply pipeline connected to the air storage tank, and the terminal air supply pipeline is connected to the compressed air source through a direct supply pipeline; wherein, the first constant temperature device and the second constant temperature device have the same structure, and the two constitute two-way equipment. In a further preferred embodiment, the number of the first constant temperature device and the second constant temperature device can be increased, for example: the number of the first constant temperature device is two or three, and the number of the second constant temperature device is two or three, etc.; the first constant temperature device and the second constant temperature device ultimately realize the supply of air to the air storage tank through the air supply pipeline and the heating device, and then the air storage tank supplies air to the terminal air supply pipeline.

[0028] In this embodiment, the first constant temperature device is used as the description basis. The first constant temperature device includes an air intake pipe, a water intake pipe and a cooler; the compressed air source is connected to the air supply pipeline through the air intake pipe, and the air intake pipe is sequentially provided with an air intake temperature sensor, an air intake pressure sensor and an air intake valve; the air intake valve is connected to the cooler through a pipeline, and the cooler is connected to the air supply pipeline.

[0029] In this embodiment, the heating device matched with the first constant temperature device and the second constant temperature device includes a first heating device and a second heating device, and the two have the same structure, wherein the first heating device is connected to the first constant temperature device, and the second heating device is connected to the second constant temperature device; the heating device is connected to the gas storage tank, wherein the gas storage tank is connected to the terminal gas supply pipeline through a pipeline, wherein, as a preference, the terminal gas supply pipeline is also connected to the compressed air source through a direct supply pipeline, and when a problem occurs in the first constant temperature device or the second constant temperature device or direct gas supply is required, gas can be directly supplied to the terminal gas supply pipeline, which also provides redundant backup.

[0030] The gas tank is connected to a filter device. Based on the configuration of the first and second thermostats, two filters are also provided, one for each. Furthermore, the gas tank is connected to a bleed line equipped with a bleed valve and a muffler. The air intake pipe is equipped with an air intake service valve, and the water intake pipe is equipped with a water intake service valve. A gas pressure sensor is installed between the terminal air supply pipeline and the gas tank. A bypass and a bypass valve are also provided between the intake valve and the intake pressure sensor, connecting the bypass to the gas supply line.

[0031] The cooling water source is connected to the water outlet via an inlet pipe, which is equipped with an inlet water temperature sensor, an inlet flow valve, and an inlet valve. The inlet pipe enters the cooler after the inlet valve and is connected to a drain outlet via a pipe after the cooler. A drain valve is also installed on this pipe. The inlet pipe then enters the cooler after the inlet valve. The cooler is connected to the outlet pipe, which is equipped with an outlet valve and connected to the drain outlet.

[0032] In this embodiment, the cooling water source includes a water-cooled condenser having a cooling water outlet pipe and a cooling water inlet pipe, a compressor and a drying filter connected to the water-cooled condenser, a water tank evaporator connected to the compressor and the drying filter, a float water replenishment valve, an overflow pipe, a water tank drain valve, a chilled water return pipe, and a chilled water outlet pipe connected to the water tank evaporator, a bypass valve disposed between the chilled water return pipe and the chilled water outlet pipe, and a circulating pump disposed on the chilled water outlet pipe. The cooling water source is connected to the first thermostat and the second thermostat via the chilled water outlet pipe. The cooling water outlet pipe and the cooling water inlet pipe are used to connect to an external water tank for water replenishment.

[0033] The chilled water outlet pipe is connected to the water inlet pipe, the chilled water return pipe is connected to the water outlet pipe, the water inlet pipe is connected to the water outlet pipe, a water filter is also provided on the chilled water return pipe, and a water pressure gauge and a check valve are provided on the chilled water outlet pipe; the drying filter is connected to the water tank evaporator through a thermal expansion valve; a high-pressure controller and a pressure gauge are provided between the water-cooled condenser and the compressor, and a low-pressure controller and a pressure gauge are provided between the compressor and the water tank evaporator; the water tank evaporator uses a coil type or a straight tube evaporator, and a temperature sensor and a liquid level switch are also provided on the water tank evaporator.

[0034] Optionally, a water flow switch is provided on the cooling water outlet pipe and / or the chilled water return pipe; a water filter is also provided on the chilled water return pipe, and a water pressure gauge is provided on the chilled water outlet pipe; an exhaust valve can be provided on the circulating pump.

[0035] In a further preferred embodiment, PLC can be combined to realize program control. On this basis, each control valve is controlled by a self-regulating PLC. For example, the air intake valve, water intake valve, exhaust valve, bypass valve, etc. are all solenoid valves controlled by PLC. Each sensor, such as water temperature sensor, intake air temperature sensor, intake air pressure sensor, etc., is connected to PLC to realize communication. This belongs to the existing conventional technical means, so it will not be elaborated here.

[0036] Through this setup, valves are adjusted accordingly based on information transmitted by the gas temperature sensor. The flow control valve is also adjusted in conjunction with the water temperature sensor to control the water flow rate and thus the temperature. The corresponding gas valves are then adjusted based on the regulated gas temperature after the circulating water, achieving ideal clean compressed air (e.g., 23±1°C). Compared to existing technologies, this system not only offers a more stable system but also lowers costs. It can simply and effectively achieve constant temperature control of compressed air, meeting the precise ambient and inlet temperature requirements of exposure machines during OLED screen manufacturing. It is also applicable to other applications requiring a constant temperature supply of compressed air.

[0037] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed in the present invention are intended to be covered by the claims of the present invention.

Claims

1. A constant temperature gas supply system, characterized in that: The invention comprises a compressed air source (1) and a cooling water source (2), a first thermostat (3) and a second thermostat (4) both connected to the compressed air source (1) and the cooling water source (2), a heating device (7) connected to the first thermostat (3) and the second thermostat (4) via an air supply pipeline (6), an air storage tank (8) connected to the heating device (7), and a terminal air supply pipeline (9) connected to the air storage tank (8), wherein the terminal air supply pipeline (9) is connected to the compressed air source (1) via a direct supply pipeline (5); the cooling water source (2) comprises a water-cooled condenser (23) having a cooling water outlet pipe (21) and a cooling water inlet pipe (22) for connecting to an external water tank, and the water-cooled condenser (23) is connected to the water-cooled condenser (23). ) connected to a compressor (24) and a drying filter (25), a water tank evaporator (26) connected to the compressor (24) and the drying filter (25), a float water replenishment valve (27), an overflow pipe (28), a water tank drain valve (216), a chilled water return pipe (29) and a chilled water outlet pipe (210) connected to the water tank evaporator (26), a bypass valve (211) arranged between the chilled water return pipe (29) and the chilled water outlet pipe (210), and a circulating pump (212) arranged on the chilled water outlet pipe (210), and the cooling water source (2) is connected to the first thermostatic device (3) and the second thermostatic device (4) through the chilled water return pipe (29) and the chilled water outlet pipe (210).

2. The constant temperature gas supply system according to claim 1, characterized in that: A high-pressure controller (213) and a pressure gauge are provided between the water-cooled condenser (23) and the compressor (24); and a low-pressure controller (214) and a pressure gauge are provided between the compressor (24) and the water tank evaporator (26).

3. The constant temperature gas supply system according to claim 2, characterized in that: The filter drier (25) is connected to the water tank evaporator (26) via a thermal expansion valve (215).

4. The constant temperature gas supply system according to claim 3, characterized in that: The water tank evaporator (26) is also provided with a temperature sensor (217) and a liquid level switch (218).

5. The constant temperature gas supply system according to claim 4, characterized in that: A water flow switch (219) is provided on the cooling water outlet pipe (21) and / or the chilled water return pipe (29).

6. The constant temperature air supply system according to claim 5, characterized in that: A water filter (220) is also provided on the chilled water return pipe (29), and a water pressure gauge (221) and a check valve (222) are provided on the chilled water outlet pipe (210).

7. The constant temperature gas supply system according to claim 6, characterized in that: The first thermostatic device (3) comprises an air intake pipe (31), a water intake pipe (37) and a cooler (313); the compressed air source (1) is connected to the air supply pipeline (6) via the air intake pipe (31); an air intake temperature sensor (33), an air intake pressure sensor (34) and an air intake valve (35) are sequentially arranged on the air intake pipe (31); the air intake valve (35) is connected to the cooler (313) via a pipeline, and the cooler (313) is connected to the air supply pipeline (6).

8. The constant temperature gas supply system according to claim 7, characterized in that: The chilled water outlet pipe (210) is connected to the water inlet pipe (37), the chilled water return pipe (29) is connected to a water outlet pipeline (316), the water inlet pipe (37) is connected to the water outlet pipeline (316), the cooler (313) is connected to the water outlet pipeline (316), the water outlet pipeline (316) is connected to a drain port (10), and a water outlet valve (315) is arranged on the water outlet pipeline (316).

9. The constant temperature gas supply system according to claim 8, characterized in that: The water inlet pipe (37) is provided with a water inlet temperature sensor (38), a water inlet flow valve (310) and a water inlet valve (311) in sequence; the pipeline of the water inlet pipe (37) enters the cooler (313) after the water inlet valve (311), and is connected to the drain port (10) through a pipeline after the cooler (313), and a drain valve (314) is provided on the pipeline.

10. The constant temperature gas supply system according to claim 9, characterized in that: The gas storage tank (8) is connected to a filter device (81) corresponding to the first constant temperature device (3) and the second constant temperature device (4); the gas storage tank (8) is also connected to a gas relief pipeline (83), and the gas relief pipeline (83) is provided with a gas relief valve (84) and a muffler (85).

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