Refrigerant explosion pressure detection device

Abstract

The utility model relates to the field of safety performance detection, in particular to the field of safety performance detection devices of refrigerants, and more particularly relates to a refrigerant explosion pressure detection device. The explosion process of the refrigerants is sealed in a controllable space through packaging of a shell; and the explosion pressure is accurately obtained by matching the piston, the limiting ejector pin and the pressure detection device. The pressure detection device composed of the force sensor and the weight transmitter is selected, compared with other pressure detection devices, the sensitivity of the pressure detection device is higher, meanwhile, through the effect of the limiting ejector pin, the zero returning state of the pressure detection device before fire blast is guaranteed, and the detection accuracy is further guaranteed. Therefore, the burning and explosion performance of the refrigerant can be accurately measured, and meanwhile, a basic support is provided for research and development of a new refrigerant.

Description

Technical Field

[0001] The present invention relates to the field of safety performance detection, particularly to the field of safety performance detection devices for refrigerants, and more specifically to a refrigerant combustion and explosion pressure detection device. Background Art

[0002] Refrigerants act as a medium for energy conversion through reversible phase changes. They absorb the heat of the object to be cooled at low temperatures and then transfer it to cooling water or air at higher temperatures to complete the energy conversion of the refrigeration equipment and achieve the refrigeration effect.

[0003] In the refrigeration fields of refrigerators and air conditioners, commonly used refrigerants at present include R600A and R410A, etc.

[0004] R600A is a colorless flammable gas at normal temperature and pressure. Its melting point is -159.4°C. Its boiling point is -11.73°C. It is slightly soluble in water and soluble in ethanol, ether, etc. It forms an explosive mixture with air, and the explosion limit is 1.9% - 8.4% (by volume). It mainly exists in natural gas, refinery gas, and cracking gas, and is obtained through physical separation, etc., and can also be prepared by isomerization of n-butane.

[0005] R410A is a new type of environmentally friendly refrigerant that does not damage the ozone layer. When refrigerating or heating, its working pressure is about 1.6 times that of ordinary R22 air conditioners, and its refrigeration (heating) efficiency is higher. The new refrigerant R410A is composed of a mixture of two quasi-azeotropes, mainly composed of hydrogen, fluorine, and carbon elements (represented as hfc), and has the characteristics of stability, non-toxicity, and excellent performance.

[0006] This type of refrigerant all has the possibility of combustion and explosion. To ensure the safety of products, it is necessary to clarify the combustion and explosion characteristics of refrigerants, including data such as the maximum explosion pressure and explosion pressure rise rate of refrigerants.

[0007] Therefore, providing a device that can accurately measure the combustion and explosion pressure of refrigerants is crucial for refrigerants, especially in the field of refrigerant safety detection. Summary of the Invention

[0008] The technical problem to be solved by the present invention is to provide a reliable detection device for refrigerant safety detection, specifically for combustion and explosion pressure detection, so as to provide data support for evaluating the safety of refrigerants, determining the explosion limit of refrigerants, clarifying the influencing factors of their combustion and explosion, and ensuring the safety of refrigerant application units, and at the same time providing data support for the research and development of new refrigerants.

[0009] To solve this technical problem, the present invention discloses a refrigerant combustion explosion pressure detection device, which includes an explosion cylinder, a pressure detection device mainly composed of a force sensor and a weight transmitter, and a limit component mainly composed of a limit thimble, a screw rod, and a screw rod motor; the limit thimble moves along the screw rod under the action of the screw rod motor; a refrigerant injection port and a pressure relief port are provided on the explosion cylinder; a pressure relief knob is installed on the pressure relief port; a piston is further included, and the piston includes a piston head and a piston rod. The piston head is located inside the explosion cylinder, and the piston rod connects the piston head and the force sensor; the screw rod is arranged parallel to the piston rod, and the limit thimble can interfere with the force sensor during its movement; an igniter, a PLC controller, a display screen, a power supply, and an ignition control switch for controlling the igniter are further included. The ignition control switch, the force sensor, the weight transmitter, and the display screen are all connected to the PLC controller; a housing is further included, and the explosion cylinder, the pressure detection device, the limit component, the igniter, the PLC controller, and the power supply are all arranged inside the housing; the display screen is arranged on the outer side of the housing, and the ignition control switch is arranged on the outer side of the housing.

[0010] During use, refrigerant is injected into the explosion cylinder through the refrigerant injection port. As the refrigerant is injected, the pressure inside the explosion cylinder increases, pushing the piston head to move and continuously generating pressure on the force sensor. After the refrigerant injection is completed, the limit thimble is controlled to move by the screw rod motor, and the limit thimble generates a force opposite to that of the explosion cylinder on the force sensor to cancel the forces on both sides of the force sensor before explosion. Then, the igniter is used to ignite, and the pressure generated by the explosion inside the explosion cylinder is finally displayed on the display screen through the signal transmission of the force sensor, the weight transmitter, and the PLC controller.

[0011] The signal transmission of the above-mentioned force sensor, weight transmitter, and PLC controller, as well as the pressure detection principle and display method, are all prior arts and will not be elaborated here.

[0012] Further preferably, an observation window is further provided on the housing, and the observation window is formed after a transparent explosion-proof plate is fixed to the housing.

[0013] Further preferably, the observation window includes a side observation window and a top observation window.

[0014] Further preferably, an operation indicator light is further included, and the operation indicator light is connected to the PLC controller and is used to display the operation state of the device.

[0015] Further preferably, an alarm indicator light is further included, and the alarm indicator light is connected to the PLC controller. When the preset conditions in the PLC controller are triggered, the device emits an alarm and prompts the operator through the alarm indicator light.

[0016] Further preferably, it further includes an emergency stop switch, which is connected to the power supply. When an accident occurs, the operator can quickly cut off the power supply through the emergency stop switch to stop the operation of the device.

[0017] The present invention provides a refrigerant combustion and explosion pressure detection device. The combustion and explosion process of the refrigerant is enclosed in a controllable space through the encapsulation of the outer shell, and the piston, the limit ejector pin and the pressure detection device are used in cooperation to accurately obtain the combustion and explosion pressure. The present invention selects a pressure detection device composed of a force sensor and a weight transmitter. Compared with other pressure detection devices, its sensitivity is higher. At the same time, through the action of the limit ejector pin, the zero state of the pressure detection device before combustion and explosion is ensured, further ensuring the accuracy of the detection. Thus, the combustion and explosion performance of the refrigerant can be accurately measured, and at the same time, it provides a basic support for the research and development of new refrigerants. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of a refrigerant combustion and explosion pressure detection device.

[0019] Figure 2 It is a perspective view of a refrigerant combustion and explosion pressure detection device.

[0020] Figure 3 It is a perspective view of the bottom view of a refrigerant combustion and explosion pressure detection device. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The following further describes the embodiments of the present invention in detail with reference to the drawings and examples. Embodiment 1

[0022] As Figure 1 and Figure 2 shown, the refrigerant combustion and explosion pressure detection device includes an explosion cylinder 1, a pressure detection device mainly composed of a force sensor 2 and a weight transmitter 3, and a limit component mainly composed of a limit ejector pin 4, a screw rod 5 and a screw rod motor 6; the limit ejector pin 4 moves along the screw rod 6 under the action of the screw rod motor 6; a refrigerant injection port 7 and a pressure relief port (covered by a pressure relief knob) are provided on the explosion cylinder; a pressure relief knob 8 is installed on the pressure relief port; it further includes a piston, the piston includes a piston head 901 and a piston rod 902, the piston head 901 is located in the explosion cylinder 1, and the piston rod 902 connects the piston head 901 and the force sensor 2; the screw rod 5 is arranged parallel to the piston rod 602, and the limit ejector pin 4 can interfere with the force sensor 2 during its movement; combined with Figure 2As we can see, this is the initial position of the device. The screw rod 6 is fixed to the right part of the drawing, and its length covers to the left of the force sensor 2. It can be understood that as the refrigerant is injected into the combustion explosion cylinder 1, the piston will be pushed to the left. However, since the screw rod and the piston rod are arranged in parallel, they always remain parallel. When the injection of the refrigerant stops, at this time, the force sensor will receive a pressure to the right from the refrigerant in the combustion explosion cylinder. If directly measured, the pressure at this time cannot be completely attributed to the pressure caused by the combustion explosion. Therefore, by rotating the screw rod motor, the limit ejector pin set on it can be pushed to the left. When it contacts the force sensor, a thrust to the left is generated to offset the pressure of the refrigerant in the combustion explosion cylinder on the force sensor, thereby realizing the "zeroing" of the force sensor. Further, let's continue to return to Figure 1 Looking further, it also includes an igniter, a PLC controller 10, a display screen 11, a power supply 12, and an ignition control switch 13 for controlling the igniter. The ignition control switch, the force sensor, the weight transmitter, and the display screen are all connected to the PLC controller; it also includes a housing 14. The combustion explosion cylinder, the pressure detection device, the limit component, the igniter, the PLC controller, and the power supply are all arranged inside the housing; the display screen is arranged outside the housing, and the ignition control switch is arranged outside the housing.

[0023] For example, we can select an electronic igniter and light the igniter through the ignition control switch 13. The specific ignition device is installed inside the combustion explosion cylinder to cause the refrigerant inside the combustion explosion cylinder to explode.

[0024] When it is necessary to detect the combustion explosion performance of a certain refrigerant, specifically the combustion explosion pressure of the refrigerant, first inject the refrigerant into the combustion explosion cylinder through the refrigerant injection port. At this time, usually a hose is needed. One end of the hose is fixed to the refrigerant injection port, and the other end is connected to the output valve of the refrigerant.

[0025] As the refrigerant is injected, the pressure inside the combustion explosion cylinder increases, pushing the piston head to move and continuously generating pressure on the force sensor. After the injection of the refrigerant is completed, control the movement of the limit ejector pin through the screw rod motor, and use the limit ejector pin to generate a force opposite to that of the combustion explosion cylinder on the force sensor, so that the forces on both sides of the force sensor before combustion explosion are offset.

[0026] Then, rotate the ignition control switch to make the igniter emit an electric spark sufficient to cause the refrigerant to explode, and the refrigerant explodes. At this time, the force generated by the explosion inside the combustion explosion cylinder is finally displayed on the display screen through the signal transmission of the force sensor, the weight transmitter, and the PLC controller.

[0027] The signal transmission of the above-mentioned force sensor, weight transmitter, and PLC controller, as well as the pressure detection principle and display method, are all prior arts and will not be elaborated here.

[0028] Preferably, in this embodiment, in combination with Figure 1 As we can see, an observation window is further provided on the outer shell. To meet the two purposes of explosion protection and observation, the observation window is formed after a transparent explosion-proof plate is fixed to the outer shell. In this embodiment, a side observation window 1501 and a top observation window 1502 are provided simultaneously.

[0029] Meanwhile, in this embodiment, preferably, an indicator light is further included. For example, in combination with Figure 1 As we can see, an operating indicator light 16 is further included. The operating indicator light is connected to the PLC controller and is used to display the operating state of the device, and an alarm indicator light 17. The alarm indicator light 17 is connected to the PLC controller. When the preset conditions in the PLC controller are triggered, the device issues an alarm and prompts the operator through the alarm indicator light.

[0030] Further preferably, in this embodiment, an emergency stop switch 18 is further included. The emergency stop switch 18 is connected to the power supply. When an accident occurs, the operator can quickly turn off the power supply through the emergency stop switch to stop the operation of the device.

Claims

1. Refrigerant combustion and explosion pressure detection device, characterized in that: It includes an explosion cylinder, a pressure detection device mainly composed of a force sensor and a weight transmitter, and a limit component mainly composed of a limit thimble, a screw rod, and a screw rod motor; the limit thimble moves along the screw rod under the action of the screw rod motor; a refrigerant injection port and a pressure relief port are provided on the explosion cylinder; a pressure relief knob is installed on the pressure relief port; it also includes a piston, the piston includes a piston head and a piston rod, the piston head is located inside the explosion cylinder, and the piston rod connects the piston head and the force sensor; the screw rod is arranged parallel to the piston rod, and the limit thimble can interfere with the force sensor during movement; it also includes an igniter, a PLC controller, a display screen, a power supply, and an ignition control switch for controlling the igniter, and the ignition control switch, the force sensor, the weight transmitter, and the display screen are all connected to the PLC controller; it also includes a housing, and the explosion cylinder, the pressure detection device, the limit component, the igniter, the PLC controller, and the power supply are all arranged inside the housing; the display screen is arranged on the outside of the housing, and the ignition control switch is arranged on the outside of the housing.

2. The refrigerant combustion and explosion pressure detection device according to claim 1, characterized in that: An observation window is also provided on the housing, and the observation window is formed after a transparent explosion-proof plate is fixed to the housing.

3. The refrigerant combustion and explosion pressure detection device according to claim 2, characterized in that: The observation window includes a side observation window and a top observation window.

4. The refrigerant combustion and explosion pressure detection device according to claim 1, wherein: It also includes an operation indicator light, and the operation indicator light is connected to the PLC controller.

5. The refrigerant explosion pressure detection device according to claim 1, characterized in that: It also includes an alarm indicator light, and the alarm indicator light is connected to the PLC controller.

6. The refrigerant combustion and explosion pressure detection device according to claim 1 or 5, characterized in that: It also includes an emergency stop switch, and the emergency stop switch is connected to the power supply.

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