CN108896251B - refrigerator door seal air tightness detection device and method - Google Patents
refrigerator door seal air tightness detection device and method Download PDFInfo
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- CN108896251B CN108896251B CN201810460971.2A CN201810460971A CN108896251B CN 108896251 B CN108896251 B CN 108896251B CN 201810460971 A CN201810460971 A CN 201810460971A CN 108896251 B CN108896251 B CN 108896251B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
Abstract
The invention discloses a refrigerator door seal air tightness detection device and a method, wherein the detection device comprises an air compressor, a pressure regulator, a flow meter, an air pipe, a refrigerator, a door seal, a pressure detection probe and a differential pressure meter, the air compressor pressure regulator, the flow meter, the refrigerator and the refrigerator are sequentially connected through the air pipe, the refrigerator is provided with a drain pipe door liner, the pressure detection probe is provided with three ports which are respectively connected with a drain pipe of the flow meter differential pressure meter refrigerator, and one end of the differential pressure meter is freely opened. The detection method comprises the following steps: the door seal is installed on a refrigerator door liner, no gap is left around the refrigerator door liner after the refrigerator door liner is closed, the refrigerator runs for 2 hours at room temperature, then the power is cut off, the flowmeter of the differential pressure meter is calibrated, the connecting part of the detection device is coated with soapy water, the pressure regulator is closed, the air compressor is started, the pressure regulator is slowly rotated, the flowmeter is monitored to reach a stable set value, no bubble exists at the soapy water, and the differential pressure meter is started to read after. The method has the advantages of high detection precision, high accuracy, no destructive operation, simple operation and low cost, and can quantitatively evaluate the sealing performance of the refrigerator door seal.
Description
Technical Field
the invention relates to the field of door seal air tightness detection device technology and process application, and particularly belongs to a refrigerator door seal air tightness detection device and method.
background
the refrigerator door seal is a refrigerator accessory used for realizing sealing between a refrigerator door body and a refrigerator body, and mainly plays roles of sealing and cold leakage prevention. If the door seal is not tight, the refrigerator can leak cold seriously, and the temperature of the air in the refrigerator body does not reach the set temperature, so that the compressor on the refrigerator can run for a long time under high load. Therefore, the energy consumption index of the refrigerator is unqualified, the service life of the compressor is shortened, and the consumption of the refrigerant in the refrigerator is accelerated. In addition, if the refrigerator door seal is not tightly sealed for a long time, the heat and mass exchange between the inside and the outside of the refrigerator is frequent, and the leakage part of the refrigerator door seal can be condensed or even frozen. The airtightness of refrigerator door seals has therefore been of high interest to manufacturers of refrigerators.
The sealing airtightness of the refrigerator door seal is detected by using a paper clamping method and an illumination method in GB/T8059-2016 (household and similar purpose refrigeration appliances). Both of these methods have drawbacks: 1, in the paper clamping method, paper has a certain width, a contact gap between a refrigerator door seal and a box body cannot be as wide, and in addition, the refrigerator door seal is fixedly connected with a door liner through a clamping groove, so that the air tightness between the refrigerator door seal and the door liner cannot be detected by adopting the paper clamping method; 2, the light in the illumination method is transmitted in a straight line, the contact part of the refrigerator door seal and the door liner is in an omega shape, and the light cannot pass through the contact part in a bending way, so that the air tightness between the refrigerator door seal and the door liner can not be detected by the illumination method.
Publication No. CN103926043B discloses a door seal tightness detection device and method, which is to make a specific box and a corresponding cover, then drill two holes on the box, introduce helium into one hole, place a concentration detection probe into the other hole, and finally evaluate the door seal tightness according to the helium concentration attenuation degree, and the detection device and method have the following defects: 1, the detection method is destructive, a hole cannot be drilled on a box body in on-site refrigerator detection, and no matter how the hole is sealed with a gap around an embedded object, a certain leakage path exists, so that the test result has deviation; 2, the detection device has one-sided performance, and the sealing performance of the refrigerator door seal is a system problem, and not only depends on the self quality of the door seal, but also depends on the matching performance among the door seal, the door liner and the box body. In addition, if the refrigerator body and the door body are simulated by adopting the self-made box body and the sealing cover in CN103926043B, the size complexity of the refrigerator door liner and the refrigerator body after molding is avoided, the refrigerator door liner and the refrigerator body are seriously deviated from the actual use conditions, and the refrigerator door liner and the refrigerator body do not accord with the actual use conditions. That is, the device and method provided in CN103926043B detect the door seal with acceptable airtightness, and once the door seal is assembled to the refrigerator door body for use, the door seal with acceptable airtightness is not always acceptable in practical use.
Disclosure of Invention
the invention aims to provide a refrigerator door seal air tightness detection device and method, which can solve the problems in the background art.
the technical scheme adopted by the invention is as follows:
a refrigerator door seal air tightness detection device comprises an air compressor, a pressure regulator, a flowmeter, an air pipe, a refrigerator, a door seal, a pressure detection probe and a differential pressure meter, wherein the air compressor is connected with the pressure regulator through the air pipe, the pressure regulator is connected with the flowmeter through the air pipe, the flowmeter is connected with the refrigerator through the air pipe, the refrigerator is a refrigerating device capable of refrigerating in a refrigerator cold cabinet type, the refrigerator is provided with a drain pipe, a door seal, a door liner, a refrigerator door and a refrigerator inner chamber, the refrigerator door is connected with the refrigerator inner chamber, the door liner is arranged on the refrigerator door, the door seal is arranged on the refrigerator door liner, the drain pipe is communicated with the refrigerator, the pressure detection probe is integrally T-shaped, a T-shaped cavity is arranged in the pressure detection probe and provided with an A port, a B port and a C port, the outside of the A port is connected with the flowmeter, the inside of the port A is directly connected with the port C through the T-shaped cavity, the outside of the port B is connected with one end of a differential pressure gauge through a gas pipe, the inside of the port B is connected with a capillary pipe, the capillary pipe extends out of the port C, a sheath is arranged outside the port C, the sheath capillary pipe of the port C of the pressure detection probe is inserted into a refrigerator drain pipe, the integral bent shape and the length of the capillary pipe are matched with those of the refrigerator drain pipe, the tail end of the capillary pipe is required to be inserted into an inner chamber of a refrigerator, one end of the differential pressure gauge is freely opened, and the other end of the differential pressure gauge.
Preferably, the volume of the air compressor is 18L, the power of the air compressor is 550W, the exhaust capacity of the air compressor is 40L/min, and the exhaust pressure of the air compressor is set to be 0.4 MPa-0.7 MPa.
Preferably, the pressure regulator is arranged on an output pipeline of the air compressor, the pressure regulator is connected with the air compressor through an air conveying pipe, and the pressure regulating range of the pressure regulator is 0 MPa-1 MPa.
Preferably, the flowmeter is positioned at the rear end of the pressure regulator, the flowmeter is connected with the pressure regulator through a gas transmission pipe, and the flow bearing range of the flowmeter is 0-20L/min.
Preferably, the sheath mounted and connected to the port C of the pressure detection probe is made of a soft plastic elastic material, the length of the sheath is greater than 50mm, the inner diameter and the outer diameter of the sheath are determined by the diameter of the port C of the pressure detection probe and the diameter of a refrigerator drain pipe together, the sheath is connected with the port C of the pressure detection probe in a sealing mode, the sheath is connected with the refrigerator drain pipe in a sealing mode, a capillary tube is arranged inside the port C of the pressure detection probe and made of a copper material, the outer diameter of the capillary tube is 0.8 mm-1.5 mm, the length of the capillary tube is greater than 80mm, the bending shape and the length of the capillary tube are determined by the shape and the length of the refrigerator drain pipe, the tail end of the capillary tube is inserted into the refrigerator inner chamber, air pressure in the refrigerator inner chamber is stably transmitted to.
preferably, one end of the differential pressure gauge is freely opened, the other end of the differential pressure gauge is connected with a port B of the pressure detection probe through a gas pipe, the numerical value of the pressure difference between the air pressure in the inner chamber of the refrigerator and the external atmospheric pressure is detected and measured, the measuring range of the differential pressure gauge is 0 hpa-100 hpa, and the minimum resolution of the differential pressure gauge is 0.01 hpa.
preferably, the gas transmission pipes used at the connecting parts of the detection device are made of the same material or different materials, so that the air compressor, the pressure regulator, the flowmeter and the pressure detection probe are in tight seamless connection with each other at the connecting parts of the pressure detection probe and the differential pressure gauge.
the method for detecting the refrigerator door seal air tightness detection device comprises the following steps:
The method comprises the following steps: the door seal to be detected is manufactured according to the corresponding size required by the refrigerator, the door seal is arranged on a refrigerator door liner, and a refrigerator door of the refrigerator is closed to check whether gaps exist around the door seal, so that the tightness and no gaps are required to be ensured around the door seal;
step two: the refrigerator is integrally placed at room temperature for more than 12 hours, and then the power-on running time of the refrigerator is more than 2 hours, and then the power is off;
step three: calibrating the differential pressure meter and the flow meter according to the using instructions of the differential pressure meter and the flow meter;
Step four: the capillary tube of the sheath at the port C of the pressure detection probe is inserted into the drain pipe of the refrigerator, so that the connection part between the sheath and the port C of the pressure detection probe and the drain pipe of the refrigerator is tight and seamless, and simultaneously, soapy water is uniformly coated around the connection part between the port C of the pressure detection probe, the sheath and the drain pipe of the refrigerator;
Step five: the air compressor and the pressure regulator, the pressure regulator and the flowmeter, the flowmeter and the pressure detection probe, and the pressure detection probe and the differential pressure gauge are sequentially connected by the air delivery pipe, so that the connection part is ensured to be tight and seamless, and simultaneously, soapy water is uniformly coated around the connection part;
Step six: closing the pressure regulator and starting the air compressor;
step seven: setting a set flow value of a flowmeter according to the volume of the refrigerator inner chamber, slowly rotating a pressure regulator, monitoring the change of the reading of the flowmeter until the set flow value is reached and maintained, and observing whether bubbles are generated in the soap water coated around each connecting part of the refrigerator door seal air tightness detection device or not in the process, wherein the soap water coated around each connecting part is required to be free from bubbles;
Step eight: starting the differential pressure meter, monitoring the reading of the differential pressure meter until the reading is stable, and recording the stable reading on the differential pressure meter;
Step nine: and comparing the stable reading value on the differential pressure meter with a preset leakage standard value, if the recorded stable reading value of the differential pressure meter is smaller than the preset leakage standard value, judging that the sealing performance of the door seal installed on the refrigerator door liner is unqualified, and if not, judging that the sealing performance is qualified.
Compared with the prior art, the invention has the following beneficial effects:
the present invention can solve the problems mentioned in the background art as described above, compared with the prior art. Compared with the traditional method for detecting the airtightness of the refrigerator door seal by adopting a paper clamping method and a light leakage method, the method has the advantages of high detection precision and high measurement accuracy, and can quantitatively evaluate the tightness of the refrigerator door seal. Compared with the helium concentration door seal tightness detection device and method disclosed in the publication number CN103926043B, the door seal tightness detection device and method disclosed in the invention have the advantages that the destructiveness is avoided, the tightness and the air tightness of the whole refrigerator are detected, the reliability of the detection result is high, the actual use condition of the door seal is the same as that of the refrigerator door seal, the operation is simple, and the cost is low.
Drawings
FIG. 1 is a schematic view of a refrigerator door seal airtightness detection apparatus according to the present invention;
Fig. 2 is a longitudinal sectional view of a pressure detecting probe in the detecting device of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
the present invention will be described in further detail with reference to examples and specific embodiments.
referring to the attached drawings, the refrigerator door seal air tightness detection device comprises an air compressor (6), a pressure regulator (5), a flow meter (4), an air pipe (3), a refrigerator (2), a door seal (1), a pressure detection probe (8) and a differential pressure meter (7), wherein the air compressor (6) is connected with the pressure regulator (5) through the air pipe (3), the pressure regulator (5) is connected with the flow meter (4) through the air pipe (3), the flow meter (4) is connected with the refrigerator (2) through the air pipe (3), the refrigerator (2) is a refrigerator refrigeration device capable of refrigerating like a refrigerator, the refrigerator (2) is provided with a drain pipe, the door seal (1), a door liner, a refrigerator door and a refrigerator inner chamber, the refrigerator door is connected with the refrigerator inner chamber (2), the door liner is arranged on the refrigerator door, the door seal (1) is arranged on the refrigerator door liner, the drain pipe is communicated with an inner chamber of the refrigerator (2), the pressure detection probe (8) is integrally T-shaped, a T-shaped cavity (shown in figure 2) is arranged in the pressure detection probe (8), the T-shaped cavity is provided with an A port, a B port and a C port, the outside of the A port is connected with the flowmeter (4) through the air pipe (3), the inside of the A port is directly connected with the C port through the T-shaped cavity, the outside of the B port is connected with one end of the differential pressure gauge (7) through the air pipe (3), the inside of the B port is connected with the capillary (802) (shown in figure 2), the capillary (802) extends out of the C port, a sheath (801) (shown in figure 2) is arranged outside the C port, the sheath (801) of the C port of the pressure detection probe (8) is inserted into the drain pipe of the refrigerator (2), and the integral bending shape length of the capillary (802) is matched with the drain pipe of the refrigerator, the tail end of the capillary tube (802) is required to be inserted into the inner chamber of the refrigerator (2), one end of the differential pressure gauge (7) is freely opened, and the other end of the differential pressure gauge (7) is connected with the pressure detection probe (8) through the gas transmission pipe (3).
the volume of the air compressor (6) is 18L, the power of the air compressor (6) is 550W, the displacement of the air compressor (6) is 40L/min, and the exhaust pressure of the air compressor (6) is set to be 0.4-0.7 MPa.
The pressure regulator (5) is arranged on an output pipeline of the air compressor (6), the pressure regulator (5) is connected with the air compressor (6) through an air conveying pipe (3), and the pressure regulating range of the pressure regulator (5) is 0-1 MPa.
The flowmeter (4) is positioned at the rear end of the pressure regulator (5), the flowmeter (4) is connected with the pressure regulator (5) through the gas transmission pipe (3), and the flow bearing range of the flowmeter (4) is 0-20L/min.
The sheath (801) installed and connected with the port C of the pressure detection probe (8) is made of soft plastic elastic materials, the length of the sheath (801) is larger than 50mm, the inner diameter and the outer diameter of the sheath (801) are determined by the diameter of the port C of the pressure detection probe (8) and the diameter of a refrigerator (2) drain pipe together, the port C of the sheath (801) and the port C of the pressure detection probe (8) are achieved, the sheath (801) is hermetically connected with the refrigerator (2) drain pipe, a capillary tube (802) is arranged inside the port C of the pressure detection probe (8), the capillary tube (802) is made of copper materials, the outer diameter of the capillary tube (802) is 0.8 mm-1.5 mm, the length of the capillary tube (802) is larger than 80mm, the bending shape and the length of the capillary tube (802) are determined by the length of the inner drainage chamber of the refrigerator (2), and the tail end of the capillary tube (, the air pressure in the inner chamber of the refrigerator (2) is stably transmitted to the differential pressure gauge (7) without being interfered by the air flow transmitted by the A port of the pressure detection probe (8).
One end of the differential pressure gauge (7) is freely opened, the other end of the differential pressure gauge (7) is connected with a B port of the pressure detection probe (8) through the air conveying pipe (3), the pressure difference value between the air pressure in the inner chamber of the refrigerator (2) and the external atmospheric pressure is detected and measured, the measuring range of the differential pressure gauge (7) is 0 hpa-100 hpa, and the minimum resolution of the differential pressure gauge (7) is 0.01 hpa.
The air delivery pipe (3) used by each connecting part in the detection device is made of the same material or different materials, so that the air compressor (6) and the pressure regulator (5), the pressure regulator (5) and the flowmeter (4), the flowmeter (4) and the pressure detection probe (8), and the pressure detection probe (8) and the differential pressure gauge (7) are in tight seamless connection at the connecting part.
The method for detecting the refrigerator door seal air tightness detection device comprises the following steps:
The method comprises the following steps: the door seal (1) to be detected is manufactured according to the corresponding size required by the refrigerator (2), the door seal (1) is installed on a refrigerator door liner, a refrigerator door of the refrigerator (2) is closed to check whether gaps exist around the door seal (1), and the tightness and no gaps are required to be ensured around the door seal (1);
Step two: the refrigerator (2) is integrally placed at room temperature for more than 12 hours, and then the power-on running time of the refrigerator (2) is more than 2 hours and then the power is off;
step three: calibrating the differential pressure meter (7) and the flowmeter (4) according to the instruction of the differential pressure meter (7) and the flowmeter (4);
step four: the capillary tube (802) of the sheath (801) at the C port of the pressure detection probe (8) is inserted into the drainage pipe of the refrigerator (2), so that the connection parts between the sheath (801) and the drainage pipe of the pressure detection probe (8) are ensured to be tight and seamless, and meanwhile, soapy water is uniformly coated around the connection parts among the C port of the pressure detection probe (8), the sheath (801) and the drainage pipe of the refrigerator (2);
Step five: the air compressor (6) and the pressure regulator (5), the pressure regulator (5) and the flowmeter (4), the flowmeter (4) and the pressure detection probe (8), and the pressure detection probe (8) and the differential pressure gauge (7) are sequentially connected by the air pipe (3), so that the connection part is ensured to be tight and seamless, and simultaneously, soapy water is uniformly coated around the connection part;
Step six: closing the pressure regulator (5) and starting the air compressor (6);
Step seven: setting a set flow value of a flowmeter according to the volume of the inner chamber of the refrigerator (2), slowly rotating a pressure regulator (5), monitoring the change of the reading of the flowmeter (4) until the set flow value is reached and maintained, and in the process, paying attention to whether bubbles are generated in soapy water coated around each connecting part of the air tightness detection device of the door seal (1) of the refrigerator (2) or not and requiring that no bubbles are generated in the soapy water coated around each connecting part;
Step eight: starting the differential pressure meter (7), monitoring the reading of the differential pressure meter (7) until the reading is stable, and recording the stable reading on the differential pressure meter (7);
Step nine: and comparing the stable reading value on the differential pressure meter (7) with a preset leakage standard value, if the recorded stable reading value of the differential pressure meter (7) is smaller than the preset leakage standard value, judging that the sealing performance of the door seal (1) arranged on the refrigerator door liner is unqualified, otherwise, judging that the sealing performance is qualified.
When the refrigerator door seal air tightness detection device is actually used for detection, the state regulation is included: after the refrigerator (2) is assembled with the door seal (1), the door seal is placed for more than 12 hours at room temperature, the refrigerator (2) is powered on again and is powered off after being operated for more than 2 hours, and the molding stress of the door seal (1) of the refrigerator (2) is eliminated; during the test, a quantity of air is injected into the inner chamber of the refrigerator (2) by the air compressor (6), the quantity of the injected air is determined according to the volume of the inner chamber of the refrigerator (2), and is generally equal to the volume of the inner chamber of the refrigerator (2). And measuring the pressure difference between the inner chamber of the refrigerator (2) and the atmosphere outside the laboratory chamber through a pressure detection probe (8) and a pressure difference meter (7), and if the pressure difference is smaller than a preset leakage standard, judging that the sealing performance of the door seal (1) is unqualified.
compared with the traditional method for detecting the tightness of the refrigerator (2) door seal (1) by adopting a paper clamping method and a light leakage method, the method has the advantages of high detection precision and high measurement accuracy, and can quantitatively evaluate the tightness of the refrigerator (2) door seal (1). Compared with the tightness detection of the helium concentration door seal (1) used in the door seal tightness detection device and method disclosed by the publication number CN103926043B, the door seal tightness detection device and method disclosed by the invention have no destructiveness, perform tightness detection on the whole refrigerator (2), have high reliability of detection results, have the same actual use condition as the door seal (1) of the refrigerator (2), and are simple to operate and low in cost.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the inventive concept of the present invention, and these changes and modifications are all within the scope of the present invention.
Claims (8)
1. A refrigerator door seal air tightness detection device comprises an air compressor, a pressure regulator, a flowmeter, an air pipe, a refrigerator, a door seal, a pressure detection probe and a differential pressure meter, wherein the air compressor is connected with the pressure regulator through the air pipe, the pressure regulator is connected with the flowmeter through the air pipe, the flowmeter is connected with the refrigerator through the air pipe, the refrigerator is a refrigerating device capable of refrigerating in a refrigerator cold cabinet type, the refrigerator is provided with a drain pipe, a door seal, a door liner, a refrigerator door and a refrigerator inner chamber, the refrigerator door is connected with the refrigerator inner chamber, the door liner is arranged on the refrigerator door, the door seal is arranged on the refrigerator door liner, the drain pipe is communicated with the refrigerator, the pressure detection probe is integrally T-shaped, a T-shaped cavity is arranged in the pressure detection probe and provided with an A port, a B port and a C port, the outside of the A port is connected with the flowmeter, the inside of the port A is directly connected with the port C through the T-shaped cavity, the outside of the port B is connected with one end of a differential pressure gauge through a gas pipe, the inside of the port B is connected with a capillary pipe, the capillary pipe extends out of the port C, a sheath is arranged outside the port C, the sheath capillary pipe of the port C of the pressure detection probe is inserted into a refrigerator drain pipe, the integral bent shape and the length of the capillary pipe are matched with those of the refrigerator drain pipe, the tail end of the capillary pipe is required to be inserted into an inner chamber of a refrigerator, one end of the differential pressure gauge is freely opened, and the other end of the differential pressure gauge.
2. The device of claim 1, wherein the capacity of the air compressor is 18L, the power of the air compressor is 550W, the displacement of the air compressor is 40L/min, and the pressure of the air compressor is set to be 0.4MPa to 0.7 MPa.
3. the device for detecting the airtightness of the door seal of the refrigerator according to claim 1, wherein the pressure regulator is mounted on an output line of the air compressor, the pressure regulator is connected with the air compressor through an air pipe, and the pressure regulation range of the pressure regulator is 0MPa to 1 MPa.
4. The refrigerator door seal airtightness detection device according to claim 1, wherein the flow meter is located at the rear end of the pressure regulator, the flow meter is connected with the pressure regulator through a gas pipe, and the flow rate bearing range of the flow meter is 0L/min to 20L/min.
5. The refrigerator door seal airtightness detection device according to claim 1, wherein the sheath mounted and connected to the port C of the pressure detection probe is made of a soft plastic elastic material, the length of the sheath is greater than 50mm, the inner and outer diameters of the sheath are determined by the diameter of the port C of the pressure detection probe and the diameter of the refrigerator drain pipe, so as to achieve the sealing connection between the sheath and the port C of the pressure detection probe, and the sheath and the refrigerator drain pipe, the port C of the pressure detection probe has a capillary tube therein, the capillary tube is made of a copper material, the outer diameter of the capillary tube is 0.8mm to 1.5mm, the length of the capillary tube is greater than 80mm, the bent shape and the length of the capillary tube are determined by the shape and the length of the refrigerator drain pipe, so as to achieve the insertion of the end, the air pressure in the inner chamber of the refrigerator is stably transmitted to the differential pressure gauge without being interfered by the air flow transmitted by the port A of the pressure detection probe.
6. The refrigerator door seal airtightness detection device according to claim 1, wherein one end of the differential pressure gauge is freely open, and the other end of the differential pressure gauge is connected with a port B of the pressure detection probe through a gas pipe, so as to realize detection and measurement of a pressure difference value between an inner chamber pressure and an external atmospheric pressure of the refrigerator, the range of the differential pressure gauge is 0hpa to 100hpa, and the minimum resolution of the differential pressure gauge is 0.01 hpa.
7. The device of claim 1, wherein the air pipes used in the connection portions of the detection device are made of the same material or different materials, thereby realizing the tight and seamless connection between the air compressor and the pressure regulator, between the pressure regulator and the flow meter, between the flow meter and the pressure detection probe, and between the pressure detection probe and the differential pressure gauge.
8. the method for detecting the airtightness of the refrigerator door seal according to any one of claims 1 to 7 is characterized by comprising the following steps:
The method comprises the following steps: the door seal to be detected is manufactured according to the corresponding size required by the refrigerator, the door seal is arranged on a refrigerator door liner, and a refrigerator door of the refrigerator is closed to check whether gaps exist around the door seal, so that the tightness and no gaps are required to be ensured around the door seal;
Step two: the refrigerator is integrally placed at room temperature for more than 12 hours, and then the power-on running time of the refrigerator is more than 2 hours, and then the power is off;
step three: calibrating the differential pressure meter and the flow meter according to the using instructions of the differential pressure meter and the flow meter;
Step four: the capillary tube of the sheath at the port C of the pressure detection probe is inserted into the drain pipe of the refrigerator, so that the connection part between the sheath and the port C of the pressure detection probe and the drain pipe of the refrigerator is tight and seamless, and simultaneously, soapy water is uniformly coated around the connection part between the port C of the pressure detection probe, the sheath and the drain pipe of the refrigerator;
step five: the air compressor and the pressure regulator, the pressure regulator and the flowmeter, the flowmeter and the pressure detection probe, and the pressure detection probe and the differential pressure gauge are sequentially connected by the air delivery pipe, so that the connection part is ensured to be tight and seamless, and simultaneously, soapy water is uniformly coated around the connection part;
step six: closing the pressure regulator and starting the air compressor;
Step seven: setting a set flow value of a flowmeter according to the volume of the refrigerator inner chamber, slowly rotating a pressure regulator, monitoring the change of the reading of the flowmeter until the set flow value is reached and maintained, and observing whether bubbles are generated in the soap water coated around each connecting part of the refrigerator door seal air tightness detection device or not in the process, wherein the soap water coated around each connecting part is required to be free from bubbles;
step eight: starting the differential pressure meter, monitoring the reading of the differential pressure meter until the reading is stable, and recording the stable reading on the differential pressure meter;
step nine: and comparing the stable reading value on the differential pressure meter with a preset leakage standard value, if the recorded stable reading value of the differential pressure meter is smaller than the preset leakage standard value, judging that the sealing performance of the door seal installed on the refrigerator door liner is unqualified, and if not, judging that the sealing performance is qualified.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810460971.2A CN108896251B (en) | 2018-05-15 | 2018-05-15 | refrigerator door seal air tightness detection device and method |
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| CN201810460971.2A CN108896251B (en) | 2018-05-15 | 2018-05-15 | refrigerator door seal air tightness detection device and method |
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| CN108896251A CN108896251A (en) | 2018-11-27 |
| CN108896251B true CN108896251B (en) | 2019-12-17 |
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| EP4040132A4 (en) * | 2019-10-04 | 2022-10-19 | Mitsubishi Electric Corporation | Airtightness evaluation device |
| CN111238746A (en) * | 2020-02-18 | 2020-06-05 | 青岛海尔电冰箱有限公司 | Method, equipment and medium for detecting sealing performance of refrigerator |
| CN111678656B (en) * | 2020-06-05 | 2022-03-22 | 哈尔滨锅炉厂有限责任公司 | Sealing detection method of multi-pass heat exchanger |
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| JP3452660B2 (en) * | 1994-10-24 | 2003-09-29 | バブコック日立株式会社 | Method and apparatus for detecting defects of honeycomb formed body |
| JP5490468B2 (en) * | 2009-08-31 | 2014-05-14 | 三洋電機株式会社 | COOLING STORAGE AND METHOD OF INSPECTING REFRIGERANT LEAK OF REFRIGERATION DEVICE |
| JP5702992B2 (en) * | 2010-11-24 | 2015-04-15 | 株式会社フクダ | Leak amount standard |
| CN103792047A (en) * | 2012-10-31 | 2014-05-14 | 美的集团股份有限公司 | High-precision gas leakage detection device and method |
| CN103630302B (en) * | 2013-09-27 | 2016-09-07 | 湖北创偲诺电气科技股份有限公司 | A kind of pipe volume pressure differential method tester |
| CN103926043B (en) * | 2014-04-23 | 2017-03-15 | 合肥美的电冰箱有限公司 | Door seal device for detecting sealability and method |
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2018
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