Refrigerating ice maker energy adjusting structure based on servo proportional reversing valve

Abstract

The invention provides a refrigerating ice maker energy adjusting structure based on a servo proportional reversing valve, and belongs to the technical field of refrigerating equipment. The adjusting valve element at the exhaust port of the compressor is connected with the piston rod, the piston rod is connected with the servo proportional reversing valve connected with the controller, and the controller is further connected with the detection sensors. The detected secondary refrigerant outlet temperature and the set outlet temperature are compared and calculated through the controller, a control signal is output to the servo proportional reversing valve, the servo proportional reversing valve is controlled to drive the piston rod to move so as to change the opening degree of the exhaust port, the refrigeration requirement is accurately matched, accurate control is accurately conducted according to technological set parameters, and the working efficiency is improved. And the position of the piston rod is monitored in real time and fed back to the controller, then the piston rod is compensated and adjusted to dynamically correct the output of the servo proportional reversing valve, closed-loop control is achieved, the drifting influence is eliminated, the influence of external factors is compensated, and long-term high-precision operation is achieved.

Description

Technical Field

[0001] This invention relates to the field of refrigeration equipment technology, specifically to an energy regulation structure for a refrigeration ice machine based on a servo proportional directional valve. Background Technology

[0002] Refrigeration equipment is widely used in modern food processing, petrochemicals, biopharmaceuticals, semiconductor manufacturing, environmental control, agricultural production, and low-temperature storage and transportation. Therefore, improving the performance of refrigeration equipment can promote the development of other industries.

[0003] As a type of refrigeration equipment, the core structure of a refrigeration ice machine includes a compressor. The compressor's discharge volume is typically controlled by an energy regulating valve. Currently available energy regulating valves are generally either mechanical or electromagnetic. Mechanical energy regulating valves rely on springs or lever mechanisms for adjustment, which are prone to wear after a period of use, leading to unstable energy output. Furthermore, electromagnetic energy regulating valves can only perform on / off control, unable to precisely adjust the discharge port opening or achieve linear adjustment. This results in sudden changes during actual use, causing excessive instantaneous current in the compressor's drive motor. Over prolonged use, this can lead to drift due to mechanical fatigue or thermal deformation. Additionally, due to technological and structural limitations, neither mechanical nor electromagnetic energy regulating valves can precisely adjust their fixed energy level, leading to increased energy consumption and adjustment lag, making them unsuitable for rapidly changing load demands. Therefore, the industry needs an energy regulating structure that can precisely adjust the discharge port flow rate, ensuring stable and drift-free energy output. Summary of the Invention

[0004] To address the aforementioned problems in existing technologies, this paper aims to provide an energy regulation structure for a refrigeration ice machine based on a servo proportional directional valve. This structure uses a servo proportional directional valve to control the piston rod on the compressor, which controls the exhaust flow. This ensures that the piston rod's displacement is directly driven by the servo proportional directional valve. Furthermore, the servo proportional directional valve operates based on a comparison between the refrigerant outlet temperature and the set outlet temperature, achieving precise regulation. A displacement sensor monitors the piston rod position, enabling closed-loop control and dynamically correcting the output of the electromagnetic proportional valve. This eliminates drift, avoids energy waste, ensures stable energy output, reduces the compressor's load, and extends its service life.

[0005] The specific technical solution is as follows: The refrigeration ice machine energy regulation structure based on a servo proportional directional valve is used to regulate the flow rate at the compressor's exhaust port. The compressor integrates a regulating valve core for controlling the flow cross-section of the exhaust port, and the regulating valve core is dynamically connected to a piston rod. It also includes the following features: Servo proportional directional valve, the servo proportional directional valve is connected to the piston rod; Several detection sensors are used for detecting the refrigerant outlet temperature and the piston rod position, respectively. The controller is connected to the servo proportional directional valve and several detection sensors. The controller receives the detection data from the sensors, analyzes and calculates it, and then generates a control signal and sends it to the servo proportional directional valve.

[0006] In the aforementioned energy regulation structure for a refrigeration ice machine based on a servo proportional reversing valve, the detection sensor for detecting the refrigerant outlet temperature is located at the energy detection position of the refrigerant outlet of the evaporator.

[0007] In the aforementioned energy regulation structure for a refrigeration ice machine based on a servo proportional directional valve, the detection sensor used for piston rod position detection is a displacement sensor and is located beside the piston rod.

[0008] The above-mentioned energy regulation structure for a refrigeration ice machine based on a servo proportional directional valve involves the controller controlling the servo proportional directional valve by comparing and calculating the refrigerant outlet temperature with the set outlet temperature, and then using PID proportional-integral to convert the temperature control range data into a data signal and transmitting it to the servo proportional directional valve.

[0009] The above-mentioned energy regulation structure for a refrigeration ice machine based on a servo proportional directional valve, wherein the servo proportional directional valve is an electro-hydraulic proportional valve or an electromagnetic proportional valve, and the output pressure of the servo proportional directional valve is linearly related to the input control signal.

[0010] The aforementioned energy regulation structure for a refrigeration ice machine based on a servo proportional directional valve includes a displacement sensor comprising one of an electronic ruler, a sliding rheostat, or a magnetostrictive sensor.

[0011] In the aforementioned energy regulation structure for a refrigeration ice machine based on a servo proportional directional valve, the regulating valve core is installed at one end of the piston rod, and the displacement of the regulating valve core is directly proportional to the opening of the exhaust port.

[0012] The aforementioned energy regulation structure for a refrigeration ice machine based on a servo proportional reversing valve also includes a temperature sensor, which is located in the compressor's exhaust passage and is connected to the controller signal.

[0013] The positive effects of the above technical solution are: The aforementioned energy regulation structure for a refrigeration machine based on a servo proportional directional valve connects the regulating valve core at the exhaust port of the compressor in an existing refrigeration machine to a piston rod, which is then connected to a servo proportional directional valve. The servo proportional directional valve drives the piston rod to move. Furthermore, the servo proportional directional valve is connected to a controller, which in turn is connected to several sensors. These sensors monitor the refrigerant outlet temperature and the piston rod position in real time and transmit this data to the controller. The controller compares the refrigerant outlet temperature with the set outlet temperature, calculates the result, and outputs a control signal to the servo proportional directional valve. This controls the servo proportional directional valve to move the piston rod, thereby adjusting the position of the regulating valve core, changing the exhaust port opening, precisely matching the refrigeration demand, and accurately controlling the system according to the process parameters. This avoids over- or under-adjustment, resulting in higher control precision and stepless precise adjustment. Additionally, by monitoring the piston rod position in real time and feeding it back to the controller, the controller compensates for and adjusts the piston rod position, dynamically correcting the output of the servo proportional directional valve. This achieves closed-loop control, eliminates drift effects, and compensates for mechanical wear or thermal deformation in real time, ensuring long-term high-precision operation. Attached Figure Description

[0014] Figure 1 This is a structural diagram of an embodiment of the energy regulation structure for a refrigeration ice machine based on a servo proportional directional valve according to the present invention.

[0015] In the attached diagram: 1. Compressor; 2. Piston rod; 3. Servo proportional directional valve; 4. Detection sensor; 5. Evaporator; 51. Refrigerant outlet; 6. Displacement sensor; 7. Controller. Detailed Implementation

[0016] To make the technical means, creative features, objectives, and effects of this invention easier to understand, the following embodiments are provided in conjunction with the appendix. Figure 1 The technical solutions provided by this invention are described in detail, but the following content is not intended to limit this invention.

[0017] Figure 1 This is a structural diagram of an embodiment of the energy regulation structure for a refrigeration ice machine based on a servo proportional reversing valve according to the present invention. Figure 1As shown, the refrigeration machine energy regulation structure based on a servo proportional directional valve provided in this embodiment includes: a compressor 1, a piston rod 2, a servo proportional directional valve 3, a controller 7, and several detection sensors 4. The refrigeration machine energy regulation structure based on the servo proportional directional valve 3 provided in this embodiment is used to regulate the flow rate of the compressor 1's exhaust port. The compressor 1 integrates a regulating valve core for controlling the flow cross-section of the exhaust port, and the regulating valve core is dynamically connected to a piston rod 2. The displacement of the piston rod 2 achieves the adjustment of the exhaust flow cross-sectional area, thereby meeting the energy regulation requirements. It is worth noting that the piston rod 2 described in this embodiment can be simply regarded as a cylinder or hydraulic cylinder, capable of displacement under the action of the pipeline system. Therefore, its specific structure will not be described in detail here.

[0018] Specifically, the servo proportional directional valve 3 is connected to the piston rod 2. The piston rod 2 is driven to move by the servo proportional directional valve 3, thereby realizing the adjustment of the exhaust flow cross-sectional area.

[0019] More specifically, several detection sensors 4 are used for detecting the temperature of the refrigerant outlet 51 and the position of the piston rod 2, respectively. By detecting the temperature of the refrigerant outlet 51, it is easy to compare it with the set outlet temperature, providing data support for the subsequent control of the servo proportional directional valve 3. In addition, by detecting the position of the piston rod 2, the position of the piston rod 2 can be monitored in real time, providing conditions for forming closed-loop control and dynamically correcting the output of the servo proportional directional valve 3 to eliminate drift. More specifically, the controller 7 is signal-connected to the servo proportional directional valve 3 and several detection sensors 4. The controller 7 controls the valve core movement of the servo proportional directional valve 3, thereby adjusting the exhaust flow cross-sectional area. Furthermore, the controller 7 can receive and analyze the detection data from the several detection sensors 4, and generate a control signal after analysis and calculation, which is then sent to the servo proportional directional valve 3. In other words, the controller 7 integrates and calculates the data collected by the several detection sensors 4 to generate a corresponding control signal to control the servo proportional directional valve 3 to make corresponding actions, achieving precise adjustment. In addition, it dynamically corrects the position of the piston rod 2 in real time, meeting the closed-loop control requirements, effectively eliminating drift effects, and compensating in real time for the impact of mechanical wear and thermal deformation on flow control, achieving long-term and high-precision operation. Furthermore, the use of a servo proportional directional valve 3 for control results in faster response, adapting to the rapidly fluctuating refrigeration load requirements. It also enables precise control based on set parameters, avoiding energy waste caused by over- or under-adjustment, and preventing system backflow and liquid carryover issues caused by inaccurate adjustment, delayed adjustment, or over-adjustment. This prevents liquid slugging damage to compressor 1 and extends its service life. It is worth noting that after the piping system enters a dormant state, the piston rod 2 is automatically set to zero, effectively eliminating accumulated errors from repeated use and further improving the accuracy of each control operation. Additionally, the controller 7 includes, but is not limited to, various dedicated controllers 7 such as PLCs and DCSs currently available on the market. It only needs to meet the basic requirements of data reception, processing, calculation, and control signal issuance; therefore, the specific model of controller 7 will not be detailed here.

[0020] More specifically, the detection sensor 4 for detecting the temperature of the refrigerant outlet 51 is set at the energy detection position of the refrigerant outlet 51 of the evaporator 5, and can realize the detection of the temperature of the refrigerant outlet 51.

[0021] More specifically, the detection sensor 4 used for detecting the position of piston rod 2 is a displacement sensor 6 and is located beside piston rod 2. The position of piston rod 2 is detected in real time by displacement sensor 6, thereby realizing dynamic correction, eliminating drift effects, and providing conditions for closed-loop control.

[0022] More specifically, the controller 7 controls the servo proportional directional valve 3 by comparing the refrigerant outlet temperature 51 with the set outlet temperature. The controller 7 uses PID proportional-integral to convert the temperature control range data into a data signal and then transmits it to the servo proportional directional valve 3. This allows the controller 7 to adjust the servo proportional directional valve 3 based on the current parameters of the system itself, accurately matching the cooling demand and performing precise control according to the process setting parameters, thus avoiding over-adjustment or under-adjustment problems.

[0023] More specifically, the servo proportional directional valve 3 is an electro-hydraulic proportional valve or a solenoid proportional valve, capable of achieving millisecond-level response speeds and adapting to scenarios with rapidly fluctuating cooling loads. Furthermore, the output pressure of the servo proportional directional valve 3 is linearly related to the input control signal; that is, the stronger the input control signal, the linearly stronger its output pressure.

[0024] More specifically, displacement sensor 6 is one of the following: electronic ruler, sliding rheostat, or magnetostrictive sensor. Of course, the specific type of displacement sensor 6 is not limited to the above-listed types; any sensor capable of real-time monitoring of the movement changes of piston rod 2 can be used.

[0025] More specifically, the regulating valve core is installed at the end of one end of the piston rod 2, achieving a direct rigid connection between the piston rod 2 and the regulating valve core. This allows changes in the displacement of the piston rod 2 to directly alter the position of the regulating valve core, thereby directly changing the exhaust port opening and achieving linear energy regulation to meet stepless adjustment requirements. It is worth noting that the displacement of the regulating valve core is directly proportional to the exhaust port opening; that is, the greater the displacement of the regulating valve core, the larger the exhaust port opening and the greater the exhaust flow rate.

[0026] More specifically, a temperature sensor is also installed in the exhaust passage of compressor 1, and the temperature sensor is connected to the controller 7. This realizes the built-in temperature sensor, and the temperature sensor can monitor temperature changes. When the controller 7 outputs control data signals, it can correct mechanical deviations caused by thermal expansion, thereby further improving the accuracy of control.

[0027] The energy regulation structure for a refrigeration ice machine based on a servo proportional directional valve provided in this embodiment includes a compressor 1, a piston rod 2, a servo proportional directional valve 3, a controller 7, and several detection sensors 4. The regulating valve core at the exhaust port of the compressor 1 is connected to a piston rod 2, and the piston rod 2 is connected to the servo proportional directional valve 3 connected to the controller 7. The controller 7 is also connected to several detection sensors 4. The controller 7 compares the detected refrigerant outlet temperature 51 with the set outlet temperature, calculates the result, and outputs a control signal to the servo proportional directional valve 3. This controls the servo proportional directional valve 3 to move the piston rod 2, changing the exhaust port opening. This precisely matches the refrigeration demand and accurately controls the system according to the process parameters, avoiding over- or under-adjustment and achieving stepless precise regulation. Furthermore, by monitoring the position of the piston rod 2 in real time and feeding it back to the controller 7, the controller compensates for and adjusts the piston rod 2 to dynamically correct the output of the servo proportional directional valve 3, achieving closed-loop control, eliminating drift effects, and compensating for external factors, thus achieving long-term high-precision operation.

[0028] The above are merely preferred embodiments of the present invention and are not intended to limit the implementation methods and protection scope of the present invention. Those skilled in the art should recognize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present invention should be included within the protection scope of the present invention.

Claims

1. A refrigeration ice machine energy regulation structure based on a servo proportional directional valve, used to regulate the flow rate of the compressor's exhaust port, wherein the compressor integrates a regulating valve core for controlling the flow cross-section of the exhaust port, and the regulating valve core is dynamically connected to a piston rod, characterized in that... include: A servo proportional directional valve, wherein the servo proportional directional valve is connected to the piston rod; A plurality of detection sensors, wherein the plurality of detection sensors are respectively used for detecting the refrigerant outlet temperature and the piston rod position; The controller is connected to the servo proportional directional valve and several of the detection sensors. The controller receives the detection data from the several detection sensors, analyzes and calculates it, and generates a control signal after analysis and calculation and sends it to the servo proportional directional valve.

2. The energy regulation structure for a refrigeration ice machine based on a servo proportional directional valve according to claim 1, characterized in that, The detection sensor used for detecting the refrigerant outlet temperature is located at the energy detection position of the refrigerant outlet of the evaporator.

3. The energy regulation structure for a refrigeration ice machine based on a servo proportional directional valve according to claim 1, characterized in that, The detection sensor used for detecting the position of the piston rod is a displacement sensor and is located on the side of the piston rod.

4. The energy regulation structure for a refrigeration ice machine based on a servo proportional directional valve according to claim 1, characterized in that, The controller controls the servo proportional directional valve by comparing the refrigerant outlet temperature with the set outlet temperature, and then using PID proportional-integral to convert the temperature control range data into a data signal and transmit it to the servo proportional directional valve.

5. The energy regulation structure for a refrigeration ice machine based on a servo proportional directional valve according to claim 1, characterized in that, The servo proportional directional valve is an electro-hydraulic proportional valve or an electromagnetic proportional valve, and the output pressure of the servo proportional directional valve is linearly related to the input control signal.

6. The energy regulation structure for a refrigeration ice machine based on a servo proportional directional valve according to claim 1, characterized in that, The displacement sensor includes one of an electronic ruler, a sliding rheostat, and a magnetostrictive sensor.

7. The energy regulation structure for a refrigeration ice machine based on a servo proportional directional valve according to claim 1, characterized in that, The regulating valve core is installed at one end of the piston rod, and the displacement of the regulating valve core is directly proportional to the opening of the exhaust port.

8. The energy regulation structure for a refrigeration ice machine based on a servo proportional directional valve according to claim 1, characterized in that, It also includes a temperature sensor, which is disposed in the exhaust passage of the compressor and is signal-connected to the controller.

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