Refrigerant allowance monitoring and alarming device

Abstract

The utility model provides a refrigerant allowance monitoring and alarming device, and relates to the field of refrigerant supercharging equipment. The refrigerant allowance monitoring and alarming device comprises a temperature detection module which is provided with a first temperature sensor and a second temperature sensor which are respectively arranged on an inlet pipe and an outlet pipe of a refrigerant supercharging device; the temperature difference control module is electrically connected with the first temperature sensor and the second temperature sensor and can calculate the temperature difference value of the second temperature sensor and the first temperature sensor, and when the temperature difference value is smaller than a set threshold value, the temperature difference control module transmits a third signal to the alarm module; the alarm module can receive the third signal to work; the refrigerant storage tank allowance is determined by arranging the temperature detection module and the temperature difference control module, the problems that in the prior art, the refrigerant storage tank allowance for refrigerant supercharging equipment is difficult to monitor, and production efficiency and product quality are affected are solved, and the refrigerant storage tank allowance monitoring device has the advantages of being simple in structure and saving cost.

Description

Technical Field

[0001] The utility model relates to the field of refrigerant boosting equipment, in particular to a refrigerant residual monitoring and alarm device. Background Art

[0002] Refrigerant boosting equipment, such as the common refrigerant boosting station, is a type of equipment specifically used in refrigeration systems. It mainly charges the refrigerant (refrigerant) into the refrigerant storage tank and then increases the pressure of the refrigerant so that it can be filled into the refrigeration system, or the refrigerant can be recovered from the system during system maintenance.

[0003] In existing refrigerant boosting equipment, although the power of the boosting equipment can be set, the pressure in the refrigerant tank continues to decrease during the charging process, and the refrigerant is easy to vaporize. The refrigerant charged is partly in gaseous state, so the operator usually cannot directly know whether the refrigerant tank has been used up, which may cause the equipment to stop working at an inappropriate time, affecting production efficiency; or too much gaseous refrigerant is boosted and charged into the product, affecting product quality. At present, since judging the refrigerant remaining in the refrigerant tank involves temperature, pressure changes and phase changes in the tank, the monitoring systems on the market are often complex in structure and high in cost, and are not suitable for all users. Utility Model Content

[0004] The utility model provides a refrigerant remaining amount monitoring device and a refrigerant remaining amount monitoring alarm device with a simple structure and low cost to solve the problem that the remaining amount of a refrigerant storage tank for a refrigerant boosting equipment in the prior art is difficult to monitor, which affects production efficiency and product quality.

[0005] The technical solution adopted by the utility model is:

[0006] A refrigerant residual monitoring and alarm device, comprising:

[0007] The temperature detection module has at least a first temperature sensor and a second temperature sensor, which are respectively arranged on the inlet pipe and the outlet pipe of the refrigerant boosting device;

[0008] a temperature difference control module, electrically connected to both the first temperature sensor and the second temperature sensor; and

[0009] Alarm module;

[0010] The temperature difference control module can calculate the temperature difference between the second temperature sensor and the first temperature sensor. When the temperature difference is less than a set threshold, the temperature difference control module transmits a third signal to the alarm module, and the alarm module starts to work.

[0011] Furthermore, the first temperature sensor and / or the second temperature sensor comprises a PT100 thermal resistor.

[0012] Furthermore, the first temperature sensor and the second temperature sensor are arranged in two groups; when the difference between the measurement results of the two groups of sensors is obvious, the temperature difference control module cuts off the transmission of the third signal.

[0013] Furthermore, the temperature difference control module is in programmable mode.

[0014] Furthermore, the programmable mode includes an adjustable threshold setting mode.

[0015] Furthermore, the alarm module comprises:

[0016] A touch screen is arranged on the control cabinet of the refrigerant boosting device.

[0017] Further, when the temperature difference is less than a set threshold, the temperature difference control module transmits a fourth signal to the touch screen.

[0018] Furthermore, the alarm module includes an alarm.

[0019] Furthermore, the alarm module has at least one stop submodule, and the stop submodule can stop the operation of the refrigerant boosting device.

[0020] Furthermore, the temperature detection module and / or the temperature difference control module and / or the alarm module adopts a detachable modular design.

[0021] The beneficial effects of the utility model are:

[0022] 1. The utility model sets a temperature detection module to measure the temperature of the inlet pipe and the outlet pipe, and a temperature difference control module to calculate the temperature difference and compare the threshold value. It determines the remaining amount of the refrigerant storage tank by measuring the temperature difference and notifies the user in time through the alarm module, thereby solving the problem in the prior art that the remaining amount of the refrigerant storage tank for the refrigerant boosting equipment is difficult to monitor, which affects the production efficiency and product quality. The utility model has the characteristics of simple structure, practical application and convenient operation.

[0023] 2. The utility model also adopts a simple circuit design, reduces the use of electronic components, thereby reducing costs and solving the problem of complex structure and high cost of existing monitoring systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 It is a three-dimensional schematic diagram of a refrigerant pressurizing system according to an embodiment of the utility model.

[0026] Figure 2 It is a rear view of the refrigerant boosting system according to an embodiment of the utility model.

[0027] Figure 3 It is a schematic diagram of the structure of the monitoring and alarm device of an embodiment of the utility model.

[0028] Reference numerals:

[0029] 10-Control cabinet;

[0030] 20-refrigerant booster device, 21-inlet pipe, 22-outlet pipe;

[0031] 100 - temperature detection module, 110 - first temperature sensor, 120 - second temperature sensor;

[0032] 200-temperature difference control module;

[0033] 300- alarm module, 310- alarm, 320- touch screen. DETAILED DESCRIPTION

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0035] The disclosure below provides many different embodiments or examples to implement different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present invention.

[0036] The embodiments of the utility model are described in detail below with reference to the accompanying drawings.

[0037] See also Figure 1-Figure 2, shows a refrigerant boosting system applicable to the refrigerant remaining amount monitoring and alarming device of this embodiment, the refrigerant boosting system is a device used in the production of refrigeration systems, such as a refrigerant boosting station, which is mainly used to increase the pressure of the refrigerant so as to fill it into the refrigeration system of the product. Figure 1 As shown in , the refrigerant boosting system is mainly composed of a refrigerant boosting device 20 and its control cabinet 10. Among them, the refrigerant boosting device 20 is provided with an inlet pipe 21 and an outlet pipe 22. The inlet pipe 21 is used to connect the refrigerant storage tank and extract the refrigerant in the refrigerant storage tank; the outlet pipe 22 is used to connect the high-pressure side of the refrigeration system of the product and fill the pressurized refrigerant therein. The control cabinet 10 is a control device of the refrigerant boosting device 20, which is used by users to operate, read and set various parameter information. When the refrigerant boosting system is working, first, the refrigerant storage tank and the refrigeration system of the product are connected to the inlet pipe 21 and the outlet pipe 22 respectively; then, the required initial pressure is set in the control cabinet 10 of the boosting system; then, the compressor or pump of the refrigerant boosting device 20 is started, the refrigerant is extracted and pressurized, and then the pressurized refrigerant is filled into the refrigeration system. During the filling process, the filling speed is limited by flow control, so that the filling of a refrigeration system is completed after the set time, and then the outlet pipe 22 is connected to the next refrigeration system. At the same time, since the refrigerant storage capacity in the refrigerant tank is also limited, the refrigerant tank needs to be replaced after the flow rate decreases after a period of time. However, due to the easy vaporization of the refrigerant, the compressor pressurization also increases the temperature of the liquid refrigerant, which will produce gaseous refrigerant. The flow monitoring is easily affected by the gaseous refrigerant, and it is also impossible to accurately measure the amount of liquid refrigerant. Therefore, the operator usually cannot directly know whether the refrigerant tank has been used up, which may cause the equipment to stop working at an inappropriate time, affecting production efficiency; or the refrigerant booster device 20 is evacuated and operated for a long time, and too much gaseous refrigerant is pressurized and filled into the refrigeration system, affecting product quality.

[0038] In order to solve the above problems of the refrigerant boosting system, this embodiment provides a refrigerant remaining amount monitoring and alarm device. Figure 1-3 The refrigerant remaining amount monitoring and alarm device provided in this embodiment mainly includes: a temperature detection module 100, a temperature difference control module 200 and an alarm module 300.

[0039] like Figure 1-Figure 3As shown in , the temperature detection module 100 is mainly composed of a first temperature sensor 110 and a second temperature sensor 120. Among them, the first temperature sensor 110 is mounted on the inlet pipe 21 of the refrigerant boosting device 20, and can detect the temperature of the inlet pipe 21 and convert it into a corresponding first electrical signal. Since the temperature of the inlet pipe 21 is mainly affected by the temperature of the liquid refrigerant in the inlet pipe 21 and the ambient temperature, the corresponding electrical signal can reflect the temperature of the liquid refrigerant in the inlet pipe 21 at a certain ambient temperature; the second temperature sensor 120 is mounted on the outlet pipe 22 of the refrigerant boosting device 20, and can detect the temperature of the outlet pipe 22 and convert it into a corresponding second electrical signal. Similarly, since the temperature of the outlet pipe 22 is mainly affected by the temperature of the liquid refrigerant in the outlet pipe 22 and the ambient temperature, the corresponding electrical signal can reflect the temperature of the liquid refrigerant in the outlet pipe 22 at a certain ambient temperature.

[0040] like Figure 3As shown in , the temperature difference control module 200 is a circuit based on a microcontroller. The temperature difference control module 200 is electrically connected to the first temperature sensor 110 and the second temperature sensor 120, can receive the first electrical signal and the second electrical signal, and can calculate the temperature difference measured by the second temperature sensor 120 and the first temperature sensor 110. In this embodiment, since the inlet pipe 21 and the outlet pipe 22 are close to each other and the ambient temperature is basically the same, the temperature difference measured by the second temperature sensor 120 and the first temperature sensor 110 is mainly affected by the temperature of the liquid refrigerant in the outlet pipe 22 and the inlet pipe 21. At the same time, a temperature setting threshold is set in the temperature difference control module 200, and the signal is compiled by comparing the inlet and outlet temperature difference with the setting threshold. When the temperature difference is less than the setting threshold, no signal transmission is performed; when the temperature difference is less than the setting threshold, a third signal is transmitted to the alarm module 300. In this embodiment, the threshold value is mainly based on the principle that when the compressor or pump of the refrigerant boosting device 20 is started to boost pressure, the internal gas and the liquid refrigerant sucked in for boosting pressure are compressed, and the pressure and temperature will also increase. Therefore, the temperature of the liquid refrigerant in the outlet pipe 22 of the refrigerant boosting device 20 is generally higher than the temperature of the liquid refrigerant in the inlet pipe 21. When the power of the refrigerant boosting device 20 is constant, this temperature should be relatively stable, but when the remaining amount of the refrigerant storage tank is reduced and the gaseous refrigerant is continuously generated, on the one hand, the refrigerant boosting device 20 is idle, resulting in an increase in the temperature in the refrigerant storage tank, an increase in the temperature of the liquid refrigerant in the inlet pipe 21, and an increase in the temperature of the inlet pipe 21; on the other hand, the amount of liquid refrigerant in the outlet pipe 22 is reduced, and the heat transfer between the outlet pipe 22 is reduced, and the temperature of the outlet pipe 22 is reduced. In summary, the temperature difference between the outlet pipe 22 and the inlet pipe 21 is mainly reduced by the reduction of the refrigerant tank residual amount. Therefore, the threshold value is set based on the temperature difference between the outlet pipe 22 and the inlet pipe 21 corresponding to the minimum allowable refrigerant tank residual amount. By setting the relationship between the threshold value and the temperature difference, it is determined whether the refrigerant tank residual amount has reached the minimum allowable value.

[0041] like Figure 1-Figure 3 As shown in , the alarm module 300 mainly includes a buzzer alarm 310 and a touch screen 320, which are used to remind the user that the refrigerant remaining in the refrigerant tank is insufficient. The touch screen 320 is installed on the operation interface on the top of the control cabinet 10 and is electrically connected to the temperature difference control module 200; it starts working after receiving the third signal, and prompts the user that the refrigerant remaining is insufficient by displaying abnormal information; and a stop option is provided on the touch screen 320, which is convenient for the user to directly stop the equipment. At the same time, the alarm 310 is installed on the side wall of the control cabinet 10, and is also electrically connected to the temperature difference control module 200; it starts working after receiving the third signal, and prompts the relevant personnel nearby that the refrigerant remaining is insufficient by issuing an alarm bell; and a stop button is provided on the alarm 310, which is convenient for the relevant personnel to directly stop the equipment. In this embodiment, only one of the alarm 310 and the touch screen 320 can also be set.

[0042] A specific implementation of this embodiment is: while starting the compressor or pump of the refrigerant booster device 20, start the monitoring alarm device of this embodiment; when the alarm 310 or the touch screen 320 prompts, the user turns off or pauses the refrigerant booster device 20 through the stop button on the alarm 310, the stop option on the touch screen 320, or the stop button on the control cabinet, and then replaces the refrigerant storage tank.

[0043] In this embodiment, the refrigerant remaining amount monitoring and alarm device is provided with a temperature detection module 100 to measure the temperature of the inlet pipe 21 and the outlet pipe 22, and a temperature difference control module 200 to calculate the temperature difference and compare the threshold value. By relying on the temperature difference measurement method, the remaining amount of the refrigerant storage tank is determined, and the user is notified in time through the alarm module 300. This solves the problem in the prior art that the remaining amount of the refrigerant storage tank for the refrigerant boosting system is difficult to monitor, which affects the production efficiency and product quality, and the monitoring system has a complex structure and high cost. It has the characteristics of simple structure, practical application, and convenient operation.

[0044] At the same time, in order to improve the convenience of users in the installation and maintenance of the device, the temperature detection module 100, the temperature difference control module 200 and the alarm module 300 of this embodiment can all adopt a detachable modular design, and the user can easily combine and connect the modules and install and replace the modules on the boosting system.

[0045] Preferably, the temperature detection module 100 in this embodiment can also use a low-cost, high-precision temperature sensor as the first temperature sensor 110 and / or the second temperature sensor 120, such as a PT100 thermal resistor commonly used in the market, which has the characteristics of low cost, good stability and fast response speed. In addition, the temperature detection module 100 can also be provided with two groups of first temperature sensors 110 and second temperature sensors 120, both of which are electrically connected to the temperature difference control module 200, and the temperature difference control module 200 compares the two groups of temperature measurement results. When the measurement results of the two groups of sensors are the same or the difference is basically negligible, the temperature difference control module 200 can normally transmit the third signal; when the difference in the measurement results of the two groups of sensors is obvious, the temperature difference control module 200 cuts off the transmission of the third signal, thereby forming a double insurance to prevent a single temperature sensor from being damaged and causing a false alarm.

[0046] Preferably, the temperature difference control module 200 in this embodiment can also be designed as a programmable mode, including that the user can adjust the set threshold of the temperature difference in the temperature difference control module 200 according to changes in production needs, so that under different working conditions, the residual monitoring device of this embodiment can accurately judge the remaining amount of refrigerant and give timely alarm prompts.

[0047] Preferably, the alarm module 300 in this embodiment can also set a normal state display in the touch screen 320, and when the temperature difference between the outlet pipe 22 and the inlet pipe 21 is greater than the set threshold, the temperature difference control module 200 transmits a fourth signal to the touch screen 320, and the touch screen 320 receives the fourth signal and displays normal operation, so that the user can determine that the residual monitoring device is operating normally before the residual alarm. In addition, the alarm module 300 in this embodiment can also use other low-cost optical or sound alarms; or send alarm information to the user's mobile phone or other terminal device through a low-cost wireless communicator, which can be Bluetooth, Wi-Fi or other low-cost, low-power communication technology; or directly connect to the PLC of the boosting system, and then transfer it to the touch screen 320 for display. Further, a stop submodule can be set in different alarm modules 300, such as the stop button on the above-mentioned alarm 310, the stop option on the touch screen 320, or a stop information sending module is set on the remote terminal device. After confirmation by the operator, the stop submodule can stop the work of the refrigerant boosting device 20, thereby increasing the control function of the monitoring alarm device.

[0048] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A refrigerant remaining amount monitoring and alarm device, characterized in that: Include: The temperature detection module (100) comprises at least a first temperature sensor (110) and a second temperature sensor (120), which are respectively arranged on the inlet pipe (21) and the outlet pipe (22) of the refrigerant boosting device (20); a temperature difference control module (200), electrically connected to both the first temperature sensor (110) and the second temperature sensor (120); and Alarm module (300); The temperature difference control module (200) can calculate the temperature difference between the second temperature sensor (120) and the first temperature sensor (110), and when the temperature difference is less than a set threshold, the temperature difference control module (200) transmits a third signal to the alarm module (300), and the alarm module (300) operates.

2. The refrigerant remaining amount monitoring and alarm device according to claim 1, characterized in that: The first temperature sensor (110) and / or the second temperature sensor (120) comprises a PT100 thermal resistor.

3. The refrigerant remaining amount monitoring and alarm device according to claim 1, characterized in that: The first temperature sensor (110) and the second temperature sensor (120) are arranged in two groups; when the difference in measurement results between the two groups of sensors is obvious, the temperature difference control module (200) cuts off the transmission of the third signal.

4. The refrigerant remaining amount monitoring and alarm device according to claim 1, characterized in that: The temperature difference control module (200) is in programmable mode.

5. The refrigerant remaining amount monitoring and alarm device according to claim 4, characterized in that: The programmable modes include an adjustable set threshold mode.

6. The refrigerant remaining amount monitoring and alarm device according to claim 1, characterized in that: The alarm module (300) comprises: A touch screen (320) is arranged on the control cabinet (10) of the refrigerant boosting device (20).

7. The refrigerant remaining amount monitoring and alarm device according to claim 6, characterized in that: When the temperature difference is greater than a set threshold, the temperature difference control module (200) transmits a fourth signal to the touch screen (320).

8. The refrigerant remaining amount monitoring and alarm device according to claim 1, characterized in that: The alarm module (300) comprises an alarm (310).

9. The refrigerant remaining amount monitoring and alarm device according to claim 1, characterized in that: The alarm module (300) has at least one stop submodule, and the stop submodule can stop the operation of the refrigerant boosting device (20).

10. The refrigerant remaining amount monitoring and alarm device according to any one of claims 1 to 9, characterized in that: The temperature detection module (100) and / or the temperature difference control module (200) and / or the alarm module (300) adopt a detachable modular design.

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