Air-cooled constant temperature constant pressure constant current water chiller

Abstract

The utility model discloses a kind of air-cooled constant temperature constant pressure constant current water chiller, comprising: air-cooled constant temperature control module, constant pressure constant current module and intelligent control module, air-cooled constant temperature control module, constant pressure constant current module is connected with intelligent control module respectively, air-cooled constant temperature control module includes the parallelly connected hot gas solenoid valve, liquid pipe solenoid valve, constant pressure constant current module includes the parallel waterway structure of bypass proportional valve and backwater proportional valve, intelligent control module receives the detection signal of temperature sensor, pressure sensor and flowmeter simultaneously, when pressure fluctuation exceeds ±0.1bar, intelligent control module configuration executes constant pressure regulation preferentially, the control logic of constant pressure constant current module includes pressure priority mode, when pressure fluctuation exceeds 10% of set value, automatically interrupt flow regulation process.The utility model is rich in function, constant pressure, constant current, constant temperature high integration, control precision is high, can quickly reduce the temperature of test product, keep water pressure, water flow and temperature constant in use process.

Description

Technical Field

[0001] This utility model relates to the field of laboratory and industrial temperature control equipment, and in particular to an air-cooled constant temperature, constant pressure and constant flow chiller. Background Technology

[0002] A chiller is a cooling water device that provides constant temperature and pressure. Generally, a certain amount of water is first added to the chiller, and then the refrigeration system in the chiller cools the water. The cooled water is then delivered to the equipment that needs to use it. After the cooled water is used, its temperature rises, and then it is circulated back into the chiller for cooling, forming a cooling cycle.

[0003] However, traditional air-cooled chillers have poor temperature control accuracy and cannot meet the needs of long-term temperature stability applications. Flow and pressure are separated, and currently commonly used chillers can only meet one of the constant control requirements, either flow or pressure, and cannot meet both simultaneously. Flow fluctuates greatly, and there is a lack of constant pressure supply, resulting in fluctuating flow rates. Therefore, they cannot meet the differentiated flow requirements of complex molds, affecting the product molding quality. Furthermore, existing chillers have poor temperature control accuracy, lack integrated design, and separate constant pressure, constant flow, and constant temperature functions, resulting in limited functionality.

[0004] Therefore, there is an urgent need for engineers in this field to develop a feature-rich, highly integrated air-cooled constant temperature, constant pressure, and constant flow chiller with high temperature control accuracy. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a wind-cooled constant temperature, constant pressure and constant flow chiller with rich functions, high integration of constant pressure, constant flow and constant temperature, high temperature control accuracy, and the ability to quickly reduce the temperature of the test sample, so that the test sample can maintain constant water pressure, water flow and temperature during use.

[0006] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0007] A wind-cooled constant temperature, constant pressure, and constant flow chiller includes: a wind-cooled constant temperature control module, a constant pressure and constant flow module, and an intelligent control module. The wind-cooled constant temperature control module and the constant pressure and constant flow module are respectively connected to the intelligent control module. The wind-cooled constant temperature control module includes a hot gas solenoid valve and a liquid line solenoid valve arranged in parallel. A coil evaporator and a heater are integrated inside the water tank. The hot gas solenoid valve and the liquid line solenoid valve are respectively arranged on a first pipeline and a second pipeline. The first pipeline and the second pipeline are respectively connected to the liquid inlet of the coil evaporator and the liquid outlet of the compressor. The liquid outlet of the coil evaporator is connected to the liquid inlet of the compressor through a third pipeline. The second pipeline... The third pipeline is connected in series with the first throttling device and the injection valve. The constant pressure and constant flow module includes a parallel water circuit structure of a bypass proportional valve and a return water proportional valve. The intelligent control module includes a main control circuit board, a temperature sensor, a pressure sensor, and a flow meter. The temperature sensor, pressure sensor, and flow meter are electrically connected to the main control circuit board. The intelligent control module simultaneously receives detection signals from the temperature sensor, pressure sensor, and flow meter. When the pressure fluctuation exceeds ±0.1 bar, the intelligent control module is configured to prioritize constant pressure regulation. The control logic of the constant pressure and constant flow module includes a pressure priority mode. When the pressure fluctuation exceeds 10% of the set value, the flow regulation process is automatically interrupted.

[0008] The above structure also includes an internal circulation pipeline, the two ends of which are connected to the inlet and outlet of the water tank, respectively. An internal circulation pump is provided on the internal circulation pipeline, and the temperature sensor is located on the internal circulation pipeline and adjacent to the inlet of the water tank.

[0009] In the above structure, the injection valve is connected to the liquid inlet of the compressor through the first throttling device at the front end, and the injection direction of the injection valve is directly opposite the motor winding of the compressor.

[0010] In the above structure, the second pipeline is respectively equipped with a condenser, a dryer filter, a second throttling device and the liquid pipe solenoid valve. The dryer filter is located between the condenser and the liquid pipe solenoid valve. One end of the second throttling device is connected to the liquid pipe solenoid valve, and the other end of the second throttling device is connected to the liquid outlet of the coil evaporator.

[0011] In the above structure, the coil evaporator and the heater are arranged in a non-contact manner, and the heater is electrically connected to the intelligent control module.

[0012] In the above structure, the parallel water circuit structure includes a fourth pipeline and a fifth pipeline arranged in parallel, and a bypass proportional valve and a first ball valve arranged on the fourth pipeline, and an external circulation pump, a second ball valve, a flow meter, and a pressure sensor arranged on the fifth pipeline. The water tank forms a closed-loop external circulation circuit with external equipment through the fourth pipeline and the fifth pipeline.

[0013] In the above structure, a return water pipeline is provided between the fourth pipeline and the fifth pipeline. The return water proportional valve is installed on the return water pipeline. The outlet of the external circulation pump is connected to the inlet of the return water proportional valve. The outlet of the return water proportional valve is connected to the outlet of the bypass proportional valve and then connected to the inlet pipeline of the water tank.

[0014] In the above structure, the outlet of the first ball valve is connected to the inlet of the bypass proportional valve, and the inlet of the first ball valve is connected to the external device.

[0015] In the above structure, the response time of the bypass proportional valve and the return water proportional valve is ≤200ms.

[0016] The beneficial effects of this utility model are as follows:

[0017] This invention achieves constant temperature, constant pressure, and constant flow rate simultaneously, resulting in a highly integrated system. The stabilization time for constant pressure and constant flow is reduced to within 5 minutes, with a long-term stability error of 1%. Temperature control accuracy is ±0.1℃, pressure fluctuation is ≤±0.1 bar, and flow rate fluctuation is ≤±0.2 L / min, meeting the requirements for long-term temperature stability applications. This invention offers rich functionality, highly integrating constant pressure, constant flow, and constant temperature. Its high temperature control accuracy allows for rapid reduction of the test sample's temperature, ensuring constant water pressure, flow rate, and temperature during use. Attached Figure Description

[0018] Figure 1 This is a structural flowchart of an embodiment of the air-cooled constant temperature, constant pressure and constant flow chiller of this utility model.

[0019] In the diagram, 1-hot gas solenoid valve, 2-liquid pipe solenoid valve, 3-water tank, 4-coil evaporator, 5-heater, 6-compressor, 7-first throttling device, 8-injection valve, 9-bypass proportional valve, 10-return water proportional valve, 11-temperature sensor, 12-pressure sensor, 13-flow meter, 14-internal circulation pump, 15-condenser, 16-dryer filter, 17-second throttling device, 18-first ball valve, 19-external circulation pump, 20-second ball valve, 21-external equipment, 22-level switch. Detailed Implementation

[0020] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding of this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0021] like Figure 1 As shown, an air-cooled constant temperature, constant pressure, and constant flow chiller includes: an air-cooled constant temperature control module, a constant pressure and constant flow module, and an intelligent control module. The air-cooled constant temperature control module and the constant pressure and constant flow module are respectively connected to the intelligent control module. The air-cooled constant temperature control module includes a hot gas solenoid valve 1 and a liquid pipe solenoid valve 2 arranged in parallel. A coil evaporator 4 and a heater 5 are integrated inside a water tank 3. The hot gas solenoid valve 1 and the liquid pipe solenoid valve 2 are respectively arranged on a first pipeline and a second pipeline. The first pipeline and the second pipeline are respectively connected to the liquid inlet of the coil evaporator 4 and the liquid outlet of the compressor 6. The liquid outlet of the coil evaporator 4 and the liquid inlet of the compressor 6 are connected through a third pipeline. The second pipeline and the third pipeline are connected in series with a third... The system includes a throttling device 7, a spray valve 8, and a constant pressure and constant flow module comprising a parallel water circuit structure of a bypass proportional valve 9 and a return water proportional valve 10. The intelligent control module includes a main control circuit board, a temperature sensor 11, a pressure sensor 12, and a flow meter 13. The temperature sensor 11, pressure sensor 12, and flow meter 13 are electrically connected to the main control circuit board. The intelligent control module simultaneously receives detection signals from the temperature sensor 11, pressure sensor 12, and flow meter 13. When the pressure fluctuation exceeds ±0.1 bar, the intelligent control module is configured to prioritize constant pressure regulation. The control logic of the constant pressure and constant flow module includes a pressure priority mode. When the pressure fluctuation exceeds 10% of the set value, the flow regulation process is automatically interrupted.

[0022] Specifically, in this embodiment, the water tank 3 is equipped with a liquid level switch 22, which is electrically connected to the intelligent control module.

[0023] Specifically, in this embodiment, the constant temperature control module of the air-cooled refrigeration system integrates a water tank 3 and a coil evaporator 4. It uses a heater 5 for non-contact heat exchange with the circulating water, adjusting and switching the hot gas solenoid valve 1 and the liquid line solenoid valve 2, with heating wire assistance, to quickly stabilize the temperature. When the compressor 6 operates, the entire refrigeration system runs, adjusting the hot gas solenoid valve 1 and the liquid line solenoid valve 2, with heating wire assistance, to achieve constant temperature. The opening of the bypass proportional valve 9 is adjusted to stabilize the pressure at the target pressure within 2 minutes. While ensuring constant pressure, the opening of the return water proportional valve 10 is adjusted to stabilize the flow rate at the target flow rate within 2 minutes.

[0024] Specifically, in this embodiment, the intelligent control module uses a PID algorithm to regulate the temperature, and a stepping algorithm to control the bypass proportional valve 9 and the return water proportional valve 10 to regulate the pressure and flow rate. It monitors the temperature, pressure, and flow rate parameters in real time and automatically switches to a safety mode when abnormalities occur.

[0025] Specifically, in this embodiment, the constant pressure and constant flow module adjusts the bypass water volume by controlling the fast bypass proportional valve 9 to quickly reach the required pressure value. After the constant pressure adjustment is completed, the return water volume is adjusted by controlling the return water proportional valve 10 to quickly reach the required flow rate value.

[0026] Specifically, in this embodiment, the external circulation outlet of the water tank 3 is connected to the inlet of the external circulation pump 19 by a pipeline. The outlet of the external circulation pump 19 is branched into a bypass circuit with the same diameter pipeline. A bypass proportional valve 9 is installed in the bypass circuit. The outlet of the bypass proportional valve 9 is connected to the external circulation inlet. The external circulation inlet is connected to the external circulation inlet of the water tank 3 by a pipeline.

[0027] In a preferred embodiment of the present invention, an internal circulation pipeline is further included. The two ends of the internal circulation pipeline are connected to the inlet and outlet of the water tank 3, respectively. An internal circulation pump 14 is provided on the internal circulation pipeline, and a temperature sensor 11 is located on the internal circulation pipeline and adjacent to the inlet of the water tank 3.

[0028] Specifically, in this embodiment, the temperature sensor 11 is installed on the internal circulation outlet water pipe to detect the liquid temperature.

[0029] In a preferred embodiment of the present invention, the injection valve 8 is connected to the inlet end of the compressor via the first throttling device 7 at the front end, and the injection direction of the injection valve 8 is directly opposite the motor winding of the compressor 6.

[0030] In a preferred embodiment of this utility model, a condenser 15, a dryer filter 16, a second throttling device 17, and a liquid pipe solenoid valve 2 are respectively provided on the second pipeline. The dryer filter 16 is located between the condenser 15 and the liquid pipe solenoid valve 2. One end of the second throttling device 17 is connected to the liquid pipe solenoid valve 2, and the other end of the second throttling device 17 is connected to the liquid outlet of the coil evaporator 4.

[0031] In a preferred embodiment of this utility model, the coil evaporator 4 and the heater 5 are arranged in a non-contact manner, and the heater 5 is electrically connected to the intelligent control module.

[0032] In a preferred embodiment of this utility model, the parallel water circuit structure includes a fourth pipeline and a fifth pipeline arranged in parallel, and a bypass proportional valve 9 and a first ball valve 18 arranged on the fourth pipeline, and an external circulation pump 19, a second ball valve 20, a flow meter 13, and a pressure sensor 12 arranged on the fifth pipeline. The water tank 3 forms a closed-loop external circulation circuit with external equipment through the fourth pipeline and the fifth pipeline.

[0033] Specifically, in this embodiment, the outlet of the external circulation pump 19 is branched off into another pipe of the same diameter as the external circulation outlet. A flow meter 13 is installed at the external circulation outlet, and a pressure sensor 12 is installed at the outlet of the flow meter 13, which continues to be the external circulation outlet. The outlet of the external circulation pump 19 is connected to the inlet pipe of the external equipment, and the outlet of the external equipment 21 is connected to the inlet pipe of the external circulation.

[0034] In a preferred embodiment of this utility model, a return water pipeline is provided between the fourth pipeline and the fifth pipeline. The return water proportional valve 10 is installed on the return water pipeline. The outlet of the external circulation pump 19 is connected to the inlet of the return water proportional valve 10. The outlet of the return water proportional valve 10 is connected to the outlet of the bypass proportional valve 9 and then connected to the inlet pipeline of the water tank 3.

[0035] In a preferred embodiment of the present invention, the outlet of the first ball valve 18 is connected to the inlet of the bypass proportional valve 9, and the inlet of the first ball valve 18 is connected to the external device 21.

[0036] In a preferred embodiment of this invention, the response time of the bypass proportional valve 9 and the return water proportional valve 10 is ≤200ms.

[0037] Specifically, in this embodiment, the first ball valve 18 and the second ball valve 20 are respectively installed on the first pipeline and the second pipeline. The outlet of the first ball valve 18 is connected to the inlet of the bypass proportional valve 9, and the inlet of the second ball valve 20 is connected to the outlet of the external circulation pump 19. The flow meter 13 is installed between the external circulation pump 19 and the second ball valve 20.

[0038] The working principle of this utility model:

[0039] During the operation of the chiller of this utility model, the constant temperature module operates in a cyclical manner: the compressor 6 runs, and the condenser 15 and fan run to dissipate heat from the compressor 6. In the entire refrigeration system, the dryer filter 16, the hot gas solenoid valve 1, the first throttling device 7 (capillary tube), the liquid injection valve 8, the liquid pipe solenoid valve 2, the second throttling device 17, the water tank 3, and the coil evaporator 4 constitute a refrigeration system pipeline. By switching the hot gas solenoid valve 1 and the liquid pipe solenoid valve 2 through PID regulation, the refrigeration system can achieve an adjustable cooling capacity. At the same time, the heater 5 provides auxiliary heating to control the liquid temperature inside the water tank 3. The temperature sensor 11 detects the temperature. The internal circulation pump 14 draws liquid from inside the water tank 3 and returns it to the water tank 3 through the return pipe. Through circulation, the liquid temperature inside the water tank 3 is made uniform to achieve the temperature control effect. During high-temperature operation, the liquid injection valve 8 opens intermittently to cool the compressor 6.

[0040] The constant pressure module operates as follows: the external circulation pump 19 runs, the pressure sensor 12 detects the pressure, and the bypass proportional valve 9 and the return water proportional valve 10 are given an initial opening value through a stepping algorithm. Then, the opening of the bypass proportional valve 9 is adjusted so that the pressure stabilizes at the target pressure within 2 minutes.

[0041] Constant flow module operation process: After the constant pressure stabilizes, the flow meter 13 detects the flow rate and adjusts the opening of the return water proportional valve 10 to stabilize the flow rate at the target flow rate within 2 minutes. If the pressure exceeds the target allowable range during the adjustment of the opening of the return water proportional valve 10, the adjustment of the return water proportional valve 10 is paused, and the constant pressure system operation process is resumed until the pressure is constant, and then the flow rate is adjusted to be constant.

[0042] This utility model is a chiller that integrates air cooling, automatic temperature control, constant water pressure, and constant water flow, and is suitable for high-precision industrial scenarios such as semiconductor aging and testing, and automotive parts manufacturing.

[0043] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0044] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0045] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, and these variations still fall within the protection scope of this utility model.

Claims

1. A wind-cooled constant temperature, constant pressure, and constant flow chiller, characterized in that, include: The system includes an air-cooled constant temperature control module, a constant pressure and constant current module, and an intelligent control module. The air-cooled constant temperature control module and the constant pressure and constant current module are respectively connected to the intelligent control module. The air-cooled constant temperature control module includes a hot gas solenoid valve and a liquid pipe solenoid valve arranged in parallel. A coil evaporator and a heater are integrated inside the water tank. The hot gas solenoid valve and the liquid pipe solenoid valve are respectively located on a first pipeline and a second pipeline. The first pipeline and the second pipeline are respectively connected to the liquid inlet of the coil evaporator and the liquid outlet of the compressor. The liquid outlet of the coil evaporator is connected to the liquid inlet of the compressor through a third pipeline. The second pipeline and the third pipeline are connected in series with a first... The system includes a throttling device and a spray valve. The constant pressure and constant flow module comprises a parallel water circuit structure of a bypass proportional valve and a return water proportional valve. The intelligent control module includes a main control circuit board, a temperature sensor, a pressure sensor, and a flow meter. The temperature sensor, pressure sensor, and flow meter are electrically connected to the main control circuit board. The intelligent control module simultaneously receives detection signals from the temperature sensor, pressure sensor, and flow meter. When the pressure fluctuation exceeds ±0.1 bar, the intelligent control module is configured to prioritize constant pressure regulation. The control logic of the constant pressure and constant flow module includes a pressure priority mode. When the pressure fluctuation exceeds 10% of the set value, the flow regulation process is automatically interrupted.

2. The air-cooled constant temperature, constant pressure, and constant flow chiller according to claim 1, characterized in that, It also includes an internal circulation pipeline, the two ends of which are connected to the inlet and outlet of the water tank, respectively. An internal circulation pump is installed on the internal circulation pipeline, and the temperature sensor is located on the internal circulation pipeline and adjacent to the inlet of the water tank.

3. The air-cooled constant temperature, constant pressure, and constant flow chiller according to claim 2, characterized in that, The injection valve is connected to the inlet of the compressor via the first throttling device at the front end, and the injection direction of the injection valve is directed towards the motor windings of the compressor.

4. The air-cooled constant temperature, constant pressure, and constant flow chiller according to claim 1, characterized in that, The second pipeline is equipped with a condenser, a dryer filter, a second throttling device, and the liquid pipe solenoid valve. The dryer filter is located between the condenser and the liquid pipe solenoid valve. One end of the second throttling device is connected to the liquid pipe solenoid valve, and the other end of the second throttling device is connected to the liquid outlet of the coil evaporator.

5. The air-cooled constant temperature, constant pressure, and constant flow chiller according to claim 1, characterized in that, The coil evaporator and heater are configured in a non-contact manner, and the heater is electrically connected to the intelligent control module.

6. The air-cooled constant temperature, constant pressure, and constant flow chiller according to claim 1, characterized in that, The parallel water circuit structure includes a fourth pipeline and a fifth pipeline arranged in parallel, and a bypass proportional valve and a first ball valve arranged on the fourth pipeline, and an external circulation pump, a second ball valve, a flow meter, and a pressure sensor arranged on the fifth pipeline. The water tank forms a closed-loop external circulation circuit with external equipment through the fourth pipeline and the fifth pipeline.

7. The air-cooled constant temperature, constant pressure, and constant flow chiller according to claim 6, characterized in that, A return water pipeline is provided between the fourth pipeline and the fifth pipeline. The return water proportional valve is installed on the return water pipeline. The outlet of the external circulation pump is connected to the inlet of the return water proportional valve. The outlet of the return water proportional valve is connected to the outlet of the bypass proportional valve and then connected to the inlet pipeline of the water tank.

8. The air-cooled constant temperature, constant pressure, and constant flow chiller according to claim 7, characterized in that, The outlet of the first ball valve is connected to the inlet of the bypass proportional valve, and the inlet of the first ball valve is connected to the external device.

9. The air-cooled constant temperature, constant pressure, and constant flow chiller according to claim 8, characterized in that, The response time of the bypass proportional valve and the return water proportional valve is ≤200ms.

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