Special gas detector for refrigeration storage
By using negative pressure and electric heating wire to preheat the air in the gas chamber in a special gas detector for cold storage, the problem of reduced sensitivity and accuracy when used in low temperature environments is solved, and higher detection accuracy and longer equipment life are achieved.
Patent Information
- Application Number
- CN202421089589.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-20
- Publication Date
- 2025-03-25
- Estimated Expiration
- 2034-05-20
AI Technical Summary
When used in low temperature environments, the sensitivity of the gas detector is reduced, the accuracy is reduced, and it is prone to damage.
A special gas detector for cold storage is designed. The air in the gas chamber outside the cold storage is preheated through a negative pressure mechanism, and the air is heated by an electric heating wire. The thermometer monitors the temperature in real time. When the safe temperature is reached, the exhaust solenoid valve is opened and the gas detector conducts detection to avoid direct contact between low-temperature gases.
It effectively avoids direct contact between low-temperature gases and gas detectors, improves detection accuracy, and extends the service life of sensors and components.
Smart Images
Figure CN222671793U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of cold storage, in particular to a special gas detector for cold storage. Background Art
[0002] Cold storage is part of the cold chain logistics link. Its main purpose is the long-term storage and turnover of goods, such as the freezing and refrigeration of food. Artificial refrigeration is used to maintain a suitable temperature and humidity environment in the warehouse. Generally, cold storage is refrigerated by a refrigerator. Liquid with a very low vaporization temperature is used as a coolant to evaporate under low pressure and mechanical control conditions, absorbing the heat in the storage warehouse, thereby achieving the purpose of cooling. The most commonly used is a compression refrigerator, which is mainly composed of a compressor, a condenser, a throttle valve and an evaporator. According to the way the evaporator is installed, it can be divided into direct cooling and indirect cooling. Direct cooling installs the evaporator in the cold storage room. When the liquid coolant passes through the evaporator, it directly absorbs the heat in the warehouse and cools down. During the use of the cold storage, the gas in the cold storage needs to be detected. The gas detector will be affected by the use environment such as temperature, humidity, wind speed, and pressure. The gas detector can only be used within the specified temperature. Direct contact with low-temperature gas will affect the sensitivity of the gas detector, reduce the detection accuracy, and easily cause damage to the sensor or other components. Utility Model Content
[0003] The technical problem to be solved by the utility model is that the gas detector can only be used within a specified temperature range. Direct contact with low-temperature gas will affect the sensitivity of the gas detector, reduce the detection accuracy, and easily cause damage to the sensor or other components.
[0004] In order to solve the above technical problems, a technical solution adopted by the utility model is: to provide a special gas detector for cold storage, including a gas detector, a connecting plate is provided on the lower surface of the gas detector, a gas box is provided at the lower end of the connecting plate, a plurality of air cavities are provided in the gas box, a negative pressure mechanism is provided at the position corresponding to the air cavity on the side wall of the gas box, an air intake mechanism is provided at the position corresponding to the air cavity on the lower surface of the gas box, a joint is provided on the side wall of the gas box, the joint and the air cavity are connected through an air pipe, the joint is connected to the gas detector, a thermometer is provided in the air cavity, and an air outlet solenoid valve is provided on the air pipe.
[0005] Through the above technical scheme, before entering the cold storage, the air cavity is evacuated into a negative pressure environment through the negative pressure mechanism, and then the cold storage is entered. When reaching the position where the gas needs to be detected, the air intake mechanism is opened so that the gas can be collected into the air cavity. The electric heating wire in the air cavity can be used to heat the air, and the air temperature in the air cavity can be detected in real time by the thermometer. When the temperature rises to a level that will not damage the internal parts of the gas detector, the air outlet solenoid valve is opened, and the air in the air cavity can be sucked into the gas detector for detection through the gas detector, thereby avoiding direct contact with the low-temperature gas, thereby ensuring the accuracy of the gas detector.
[0006] The utility model is further configured as follows: the opening temperature of the air outlet solenoid valve is 20 degrees Celsius. When one of the air outlet solenoid valves is in an open state, the other air outlet solenoid valves are in a non-openable state. The negative pressure mechanism includes an exhaust pipe and an exhaust check valve. The exhaust pipe is placed on the side wall of the air box at a position corresponding to the air cavity. The exhaust pipe is connected to the air cavity. An exhaust check valve is provided at the end of the exhaust pipe. The air intake mechanism includes an air hood and an air intake solenoid valve. The air hood is placed on the lower surface of the air box at a position corresponding to the air cavity. The air hood is connected to the air cavity. An air intake solenoid valve is provided on the air hood. An air pressure sensor is provided at a position corresponding to the air cavity on the side wall of the air box. The detection end of the air pressure sensor is placed in the air cavity. A display panel, a position recording panel and a locator are provided on the gas detector.
[0007] Through the above technical scheme, when one of the air outlet solenoid valves is in an open state, the other air outlet solenoid valves are in a non-openable state, thereby preventing the gas in multiple air cavities from entering the gas detector and causing confusion in gas detection. The external vacuum pump can be connected through the vacuum pipe to extract the air in the air cavity to form a negative pressure environment in the air cavity. The gas in the cold storage can be conveniently collected through the air hood and the air inlet solenoid valve. The air pressure sensor can be used to detect the air pressure in the air cavity, the detection result can be displayed through the display panel, and the position recording panel and the locator can be used to record the position of the collected gas.
[0008] The beneficial effects of the utility model are as follows:
[0009] 1. Before entering the cold storage, the air cavity is pumped into a negative pressure environment through the negative pressure mechanism, and then enter the cold storage. When you reach the position where the gas needs to be detected, open the air intake mechanism so that the gas can be collected into the air cavity. The electric heating wire in the air cavity can be used to heat the air. The thermometer can be used to detect the air temperature in the air cavity in real time. When the temperature rises to a level that will not damage the internal parts of the gas detector, open the gas outlet solenoid valve, and the gas detector can be used to suck the air in the air cavity into the gas detector for detection, thereby avoiding direct contact with low-temperature gas and ensuring the accuracy of the gas detector;
[0010] 2. When one of the air outlet solenoid valves is in an open state, the other air outlet solenoid valves are in a non-openable state, thereby preventing the gas in multiple air cavities from entering the gas detector and causing confusion in gas detection. The air extraction pipe can be connected to an external vacuum pump to extract the air in the air cavity, forming a negative pressure environment in the air cavity. The gas in the cold storage can be conveniently collected through the air hood and the air inlet solenoid valve. The air pressure sensor can be used to detect the air pressure in the air cavity, the detection results can be displayed through the display panel, and the position recording panel and the locator can be used to record the position of the collected gas. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 It is a schematic diagram of the structure of the utility model;
[0012] Figure 2 This is a schematic diagram of the bottom structure of the utility model;
[0013] Figure 3 It is a schematic diagram of the cross-sectional structure of the air box of the utility model.
[0014] In the figure: 1. Gas detector; 2. Connecting plate; 3. Gas box; 4. Display panel; 5. Position recording panel; 6. Positioner; 7. Gas hood; 8. Inlet solenoid valve; 9. Exhaust pipe; 10. Exhaust one-way valve; 11. Connector; 12. Air pipe; 13. Exhaust solenoid valve; 14. Air pressure sensor; 15. Air cavity; 16. Heating wire; 17. Thermometer. DETAILED DESCRIPTION
[0015] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.
[0016] See also Figures 1 to 3A gas detector for cold storage includes a gas detector 1, a connecting plate 2 is provided on the lower surface of the gas detector 1, a gas box 3 is provided at the lower end of the connecting plate 2, a plurality of air cavities 15 are provided in the gas box 3, a heating wire 16 is provided on the side wall of the air cavity 15, a negative pressure mechanism is provided at the position corresponding to the side wall of the air box 3 and the air cavity 15, an air intake mechanism is provided at the position corresponding to the lower surface of the air box 3 and the air cavity 15, a joint 11 is provided on the side wall of the air box 3, the joint 11 and the air cavity 15 are connected through an air pipe 12, the joint 11 is connected to the gas detector 1, a thermometer 17 is provided in the air cavity 15, and an air outlet solenoid valve 13 is provided on the air pipe 12. Before entering the cold storage, the negative pressure mechanism is provided. The pressure mechanism draws the air cavity 15 into a negative pressure environment, and then enters the cold storage. When it reaches the position where the gas needs to be detected, the air intake mechanism is opened so that the gas can be collected into the air cavity 15. The electric heating wire 16 in the air cavity 15 can be used to heat the air. The air temperature in the air cavity 15 can be detected in real time by the thermometer 17. When the temperature rises to a level that will not damage the internal parts of the gas detector 1, the air outlet solenoid valve 13 is opened, and the air in the air cavity 15 can be sucked into the gas detector 1 for detection through the gas detector 1, thereby preventing the low-temperature gas from directly contacting the gas detector 1, thereby ensuring the accuracy of the gas detector 1.
[0017] like Figures 1 to 3 As shown, the opening temperature of the air outlet solenoid valve 13 is 20 degrees Celsius. When one of the air outlet solenoid valves 13 is in an open state, the other air outlet solenoid valves 13 are in a non-openable state. The negative pressure mechanism includes an air extraction pipe 9 and an air extraction non-return valve 10. The air extraction pipe 9 is placed at a position corresponding to the side wall of the air box 3 and the air cavity 15. The air extraction pipe 9 is connected to the air cavity 15. The end of the air extraction pipe 9 is provided with an air extraction non-return valve 10. The air intake mechanism includes an air hood 7 and an air intake solenoid valve 8. The air hood 7 is placed at a position corresponding to the air cavity 15 on the lower surface of the air box 3. The air hood 7 is connected to the air cavity 15. The air intake solenoid valve 8 is provided on the air hood 7. An air pressure sensor 14 is provided at a position corresponding to the air cavity 15 on the side wall of the air box 3. The detection end of the air pressure sensor 14 is placed in the air cavity 15. The gas detection The gas detector 1 is provided with a display panel 4, a position recording panel 5 and a locator 6. When one of the air outlet solenoid valves 13 is in an open state, the other air outlet solenoid valves 13 are in a non-openable state, thereby preventing the gas in multiple air cavities 15 from entering the gas detector 1 and causing confusion in gas detection. The air extraction pipe 9 can be connected to an external vacuum pump, so that the air in the air cavity 15 can be extracted to form a negative pressure environment in the air cavity 15. The gas in the cold storage can be conveniently collected through the gas hood 7 and the air inlet solenoid valve 8. The air pressure sensor 14 can be used to detect the air pressure in the air cavity. The detection result can be displayed through the display panel 4. The position recording panel 5 and the locator 6 can be used to record the position of the collected gas.
[0018] When the utility model is used, before entering the cold storage, the external vacuum pump can be connected through the vacuum pipe 9, so that the air in the air cavity 15 can be extracted, and a negative pressure environment is formed in the air cavity 15, and then the cold storage is entered. When the position where the gas needs to be detected is reached, the gas in the cold storage can be conveniently collected through the gas hood 7 and the air inlet electromagnetic valve 8, so that the gas can be collected into the air cavity 15, and the electric heating wire 16 in the air cavity 15 can be used to heat the air, and the temperature of the air in the air cavity 15 can be detected in real time through the thermometer 17. When the temperature rises to a level that will not damage the internal parts of the gas detector 1, the air outlet electromagnetic valve 13 is opened, and the gas detection The instrument 1 can suck the air in the air cavity 15 into the gas detector 1 for detection, thereby preventing the low-temperature gas from directly contacting the gas detector 1, thereby ensuring the accuracy of the gas detector 1. When one of the air outlet solenoid valves 13 is in an open state, the remaining air outlet solenoid valves 13 are in a non-openable state, thereby preventing the gas in multiple air cavities 15 from entering the gas detector 1 and causing confusion in gas detection. The air pressure sensor 14 can be used to detect the air pressure in the air cavity, the display panel 4 can display the detection results, and the position recording panel 5 and the locator 6 can be used to record the position of the collected gas.
[0019] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.
Claims
1. A gas detector for cold storage, characterized in that; The invention comprises a gas detector (1), wherein a connecting plate (2) is provided on the lower surface of the gas detector (1), an air box (3) is provided at the lower end of the connecting plate (2), a plurality of air cavities (15) are provided in the air box (3), a heating wire (16) is provided on the side wall of the air cavity (15), a negative pressure mechanism is provided at a position corresponding to the side wall of the air box (3) and the air cavity (15), an air intake mechanism is provided at a position corresponding to the lower surface of the air box (3) and the air cavity (15), a joint (11) is provided on the side wall of the air box (3), the joint (11) and the air cavity (15) are connected via an air pipe (12), the joint (11) is connected to the gas detector (1), a thermometer (17) is provided in the air cavity (15), and an air outlet electromagnetic valve (13) is provided on the air pipe (12).
2. A gas detector for cold storage according to claim 1, characterized in that: The opening temperature of the air outlet solenoid valve (13) is 20 degrees Celsius. When one of the air outlet solenoid valves (13) is in an open state, the remaining air outlet solenoid valves (13) are in a non-openable state.
3. A gas detector for cold storage according to claim 1, characterized in that: The negative pressure mechanism comprises an exhaust pipe (9) and an exhaust check valve (10); the exhaust pipe (9) is placed at a position corresponding to the side wall of the air box (3) and the air cavity (15); the exhaust pipe (9) is connected to the air cavity (15); and the exhaust check valve (10) is provided at the end of the exhaust pipe (9).
4. A gas detector for cold storage according to claim 1, characterized in that: The air intake mechanism comprises an air hood (7) and an air intake solenoid valve (8); the air hood (7) is placed on the lower surface of the air box (3) at a position corresponding to the air cavity (15); the air hood (7) is connected to the air cavity (15); and the air intake solenoid valve (8) is provided on the air hood (7).
5. A gas detector for cold storage according to claim 1, characterized in that: An air pressure sensor (14) is provided at a position on the side wall of the air box (3) corresponding to the air cavity (15), and a detection end of the air pressure sensor (14) is placed in the air cavity (15).
6. A gas detector for cold storage according to claim 1, characterized in that: The gas detector (1) is provided with a display panel (4), a position recording panel (5) and a locator (6).