Smell detection method for refrigeration equipment and refrigeration equipment

Abstract

The invention provides a smell detection method for refrigeration equipment and the refrigeration equipment. The smell detection method comprises the steps that a signal indicating whether gas in a refrigeration chamber needs to be detected or not is obtained; if yes, judging whether the cavity is in a clean state or not, specifically, obtaining the concentration value D1 of air in the current refrigeration chamber, judging whether D1 is larger than a first preset threshold value N1 or not, if D1 is larger than N1, starting a replacement program to replace clean gas for the cavity until the cavity is in the clean state, and if D1 is not larger than N1, judging that the cavity of the smell detection device is in the clean state; gas in the refrigeration chamber is conveyed to the cavity of the smell detection device; controlling a smell sensor of the cavity to detect gas components entering the cavity; and discharging the gas in the cavity to enable the cavity to be in a clean state. According to the invention, the cavity is ensured to be in a clean state before smell detection, so that the detected gas in the cavity is not polluted or diluted, and the accuracy of a detection result is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigeration equipment, and in particular to an odor detection method for refrigeration equipment and the refrigeration equipment. Background Art

[0002] At present, many kinds of items are stored in refrigeration equipment. Different items release different odors during storage, which affects the user experience. At present, some refrigeration equipment is equipped with an odor detection device in the refrigeration room. The odor detection device detects the type and concentration of odor in the refrigeration room for user reference. The user judges the status of the item based on the detection result of the odor sensor. However, when the odor detection device detects the gas in the room, if the cavity of the odor detection device is not clean, it will affect the detection accuracy of the odor detection device.

[0003] In view of this, it is necessary to design a new odor detection method for refrigeration equipment and refrigeration equipment to solve one of the above problems. Summary of the invention

[0004] The present invention provides an odor detection method for refrigeration equipment and refrigeration equipment to solve one of the above problems.

[0005] In order to achieve the above object, the technical solution provided by the present invention is as follows:

[0006] The present invention provides an odor detection method for refrigeration equipment, the odor detection method comprising:

[0007] Get the signal whether the gas in the refrigeration room needs to be tested;

[0008] If yes, determining whether the cavity is in a clean state specifically includes: obtaining a current concentration value D1 of the indoor air in the refrigeration room, determining whether D1 is greater than a first preset threshold value N1, if D1 is greater than N1, starting a replacement procedure to replace the cavity with clean gas until the cavity is in a clean state, if D1 is not greater than N1, determining that the cavity of the odor detection device is in a clean state;

[0009] transporting the gas in the refrigeration room to the cavity of the odor detection device;

[0010] The odor sensor of the control cavity detects the gas composition entering the cavity;

[0011] The gas in the cavity is discharged to make the cavity clean.

[0012] Further, obtaining the current concentration value D1 of the indoor air in the refrigeration room includes:

[0013] Obtaining the detection value Ra of the odor sensor when the air in the cavity is clean;

[0014] The gas in the refrigeration compartment is transported to the cavity of the odor detection device, and the detection value Rg of the gas entering the cavity is detected by the odor sensor;

[0015] Then, D1 = K*Ra / Rg, where K is a constant coefficient.

[0016] Further, the replacement procedure includes: obtaining a second preset threshold value N2, wherein N2 is greater than N1, taking an integer value M1 obtained by dividing N2 by D1, and replacing clean air into the cavity for M1 consecutive times;

[0017] Continue to obtain the current indoor air concentration value D2 of the refrigeration room;

[0018] Determine whether D2 is greater than a first preset threshold value N1. If D2 is greater than N1, start the compensation replacement program to continue replacing the clean gas for the cavity until the cavity is in a clean state. If D2 is not greater than N1, determine that the cavity of the odor detection device is in a clean state.

[0019] Furthermore, the compensation replacement procedure includes: continuously replacing the clean gas for the cavity M2 times, and obtaining the concentration value Di of the current indoor air in the refrigeration room after each replacement, and determining whether Di is greater than a first preset threshold value N1; if Di is greater than N1, then continuing to replace the clean gas for the cavity M3 times continuously, and determining that the cavity is in a clean state; if Di is not greater than N1, then determining that the cavity of the odor detection device is in a clean state.

[0020] Furthermore, obtaining the current concentration value Di of the indoor air in the refrigeration room includes:

[0021] The detection value of the clean gas entering the cavity detected by the odor sensor is Rgi;

[0022] Then, Di=K*Ra / Rgi, where K is a constant coefficient.

[0023] Furthermore, the odor detection method further comprises:

[0024] After determining that the cavity is in a clean state, the odor sensor is controlled to correct the zero point, and then the gas in the refrigeration room is transported to the cavity.

[0025] Furthermore, before detecting the gas to be detected in the cavity, it is first determined whether the gas to be detected in the cavity is within a preset temperature range and a preset humidity range, and if so, the odor sensor is controlled to start detection;

[0026] If not, the heating module is controlled to select a suitable power to work according to the detected temperature detected by the temperature and humidity sensing unit, and / or the humidification component is controlled to select a suitable work-stop ratio to work according to the detected humidity detected by the temperature and humidity sensing unit.

[0027] Furthermore, before detecting the gas to be tested in the cavity, the gas to be tested in the cavity is allowed to stand for a first preset time period.

[0028] Furthermore, after the detection is completed, the gas in the cavity is discharged or the cavity is filled with a cleaning gas to clean the cavity.

[0029] The present invention also provides a refrigeration device, comprising a refrigeration compartment and an odor detection device arranged in the refrigeration compartment. The refrigeration device executes the above-mentioned odor detection method for refrigeration device to detect gas in the refrigeration compartment.

[0030] Compared with the prior art, the beneficial effect of the present invention is that the odor detection method of the present invention ensures that the cavity is in a clean state before detecting the odor, so as to ensure that the gas detected in the cavity is not contaminated or diluted, thereby ensuring the accuracy of the detection result. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of an embodiment of a refrigeration device of the present invention.

[0032] Figure 2 It is a structural schematic diagram of another embodiment of the refrigeration equipment of the present invention.

[0033] Figure 3 It is a structural schematic diagram of another embodiment of the refrigeration equipment of the present invention.

[0034] Figure 4 It is a structural schematic diagram of another embodiment of the refrigeration equipment of the present invention.

[0035] Figure 5 It is a three-dimensional structural schematic diagram of an embodiment of an odor detection device for refrigeration equipment of the present invention.

[0036] Figure 6 It is a three-dimensional structural schematic diagram of another embodiment of the odor detection device for refrigeration equipment of the present invention.

[0037] Figure 7 It is a three-dimensional structural schematic diagram of another embodiment of the odor detection device for refrigeration equipment of the present invention.

[0038] Figure 8 It is a cross-sectional view of another embodiment of the odor detection device for refrigeration equipment of the present invention.

[0039] Fig. 9 It is a structural schematic diagram of an embodiment of an odor separation module in an odor detection device for refrigeration equipment of the present invention.

[0040] Fig.10 It is a structural schematic diagram of another embodiment of the odor separation module in the odor detection device of the refrigeration equipment of the present invention.

[0041] Fig.11 It is a structural schematic diagram of another embodiment of the odor separation module in the odor detection device of the refrigeration equipment of the present invention.

[0042] Fig.12 It is a structural schematic diagram of a humidifying component in an odor detection device of a refrigeration device of the present invention.

[0043] Fig.13 It is a structural schematic diagram of an embodiment of an exhaust device in an odor detection device for refrigeration equipment of the present invention.

[0044] Fig.14 It is a structural schematic diagram of another embodiment of the tail gas device in the odor detection device of the refrigeration equipment of the present invention.

[0045] Fig.15 It is a flow chart of an embodiment of a method for detecting odor of a refrigeration device according to the present invention.

[0046] Fig.16 It is a flow chart of another embodiment of the method for detecting odor of refrigeration equipment of the present invention.

[0047] Fig.17 It is a flow chart of another embodiment of the method for detecting odor of refrigeration equipment of the present invention.

[0048] Fig.18 It is a flow chart of another embodiment of the method for detecting odor of refrigeration equipment of the present invention. DETAILED DESCRIPTION

[0049] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work should fall within the scope of protection of the present invention.

[0050] It should be noted that the terms "upper" and "lower" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the auxiliary figures, and are only for the convenience of simplifying the description of the present invention, rather than indicating or implying that the device referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present invention. Specifically, in the present invention, the user's operating surface is the front, the direction toward the ground is the bottom, and conversely, the direction away from the ground is the upper, and other descriptions indicating directions are defined based on "upper" and "lower".

[0051] In various drawings of the present invention, for the convenience of illustration, some sizes of structures or parts are exaggerated relative to other structural parts, and therefore, they are only used to illustrate the basic structure of the subject matter of the present invention.

[0052] The present invention provides an odor detection method for refrigeration equipment and refrigeration equipment, such as Figures 1 to 18 As shown, the odor detection method is implemented based on the structure of a refrigeration device, and the refrigeration device executes the odor detection method for refrigeration equipment of the present invention to detect the gas in the refrigeration compartment 201.

[0053] The refrigeration device comprises a refrigeration compartment 201 and an odor detection device 100 disposed in the refrigeration compartment 201 to detect gas in the refrigeration compartment 201 .

[0054] In this embodiment, Figures 1 to 4 As shown, the refrigeration device includes an inner liner 200 forming a refrigeration compartment 201, and the odor detection device 100 is fixed on the inner liner 200. Preferably, a groove (not shown) recessed outward is provided on the side of the inner liner 200, and the odor detection device 100 is snapped into the groove, so that the odor detection device 100 does not affect the volume of the refrigeration compartment 201, nor does it affect the normal storage in the storage compartment 201. At the same time, no extra installation components are required, saving costs.

[0055] like Figures 5 to 14 As shown, the odor detection device 100 includes a shell 10 forming a cavity 18, an odor sensor 20 located in the cavity 18, and a gas driving module 40 for driving gas to enter and exit the cavity 18. The shell 10 is provided with an air inlet 11 for connecting the cavity 18 with a chamber to be detected, an exhaust port 12 for connecting the cavity 18 with the chamber to be detected or the external environment, and an auxiliary air inlet 13 for connecting the cavity 18 with the external environment.

[0056] like Figure 5 As shown, the odor detection device 100 sets the odor sensor 100 in the cavity 18 to provide a relatively stable detection environment for the odor sensor 20. At the same time, the odor detection device 100 is provided with an auxiliary air inlet 13 connecting the cavity 18 with the outside of the refrigeration device. Before detecting the gas, the cavity can be purified through the auxiliary air inlet 13; after the detection is completed, the detected gas in the cavity 18 is discharged, and the cavity 18 is filled with clean gas through the auxiliary air inlet 13 or the cavity 18 is kept in a state close to vacuum, so as to ensure that the odor sensor 20 is kept in a clean state without being contaminated, and no detected gas will remain in the cavity 18, thereby ensuring that the cavity 18 is in a clean state, providing the user with accurate odor conditions in the refrigeration compartment 201, and indirectly obtaining the freshness and / or corruption degree of the food in the refrigeration compartment 201.

[0057] Specifically, the air inlet 11 and the air outlet 12 are arranged at opposite ends of the housing 10, and the odor sensor 20 is located between the air inlet 11 and the air outlet 12. The present invention does not limit the specific position of the auxiliary air inlet 13, as long as the clean air outside the refrigeration device enters the cavity 18 through the auxiliary air inlet 13.

[0058] The odor sensor 20 is fixed on the inner wall of the cavity 18, so that the odor sensor 20 is in a stable state during the detection process.

[0059] The odor sensor 20 in the present invention is a semiconductor odor sensor 20, and the response value of detecting a gas with a relatively high concentration is smaller than the response value of detecting a clean gas.

[0060] As a preferred embodiment of the odor detection device 100 of the present invention, Figure 8 As shown, a partition plate 30 is provided in the cavity 18 to divide the cavity 18 into a pretreatment chamber 181 and a detection chamber 182, and a through hole 31 connecting the pretreatment chamber 181 and the detection chamber 182 is provided on the partition plate 30, the air inlet 11 is connected to the pretreatment chamber 181, the exhaust port 12 is connected to the detection chamber 182, the auxiliary air inlet 13 is connected to the pretreatment chamber 181 or the detection chamber 182, the odor sensor 20 is located in the detection chamber 182, and the gas driving module 40 can be located in the pretreatment chamber or outside the shell 10. That is, the gas to be detected first enters the pretreatment chamber 181 for pretreatment to ensure that the gas to be detected is diffused to a stable state in the pretreatment chamber 181 as much as possible. At the same time, its temperature and humidity are within the optimal temperature and humidity range. The gas after pretreatment is in a relatively stable state when it enters the position of the odor sensor 20 in the detection chamber 182, so as to improve the accuracy and reliability of the detection results. Moreover, pretreating the gas in the pretreatment chamber 181 can also save the detection time of the odor sensor 20.

[0061] In some specific implementations, a waterproof and breathable membrane 17 is provided on the through hole 31 to further ensure that the gas to be detected entering the detection cavity 182 can meet the humidity requirement.

[0062] As another preferred embodiment of the odor detection device of the present invention, Figure 7As shown, the odor detection device 100 also includes an air inlet pipe 14 arranged at the air inlet 11, an exhaust pipe 15 arranged at the exhaust port 12, and an auxiliary air inlet pipe 16 arranged at the auxiliary air inlet 13, which facilitates the gas to enter and exit the cavity 18. In particular, without the aid of other pipelines, the gas detected in the cavity 18 can be discharged to the outside of the refrigeration equipment or the clean gas outside the refrigeration chamber 201 can be filled into the cavity 18 through the auxiliary air inlet pipe 16. It can be directly installed on the refrigeration equipment, thereby improving the applicability of the odor detection device 100.

[0063] Generally speaking, a refrigeration device includes several different refrigeration compartments 201 for containing different articles, so the gases in different refrigeration compartments 201 are different. In order to detect the gases in different refrigeration compartments 201, as another preferred embodiment of the odor detection device of the present invention, the air intake pipe 14 includes an air intake main pipe 141 connected to the air inlet 11, a plurality of air intake branches 142 arranged in parallel from the end of the air intake main pipe 141, and an air intake valve 143 provided at the connection between the air intake main pipe 141 and the air intake branch pipe 142, so that the plurality of air intake branches 142 can match different refrigeration compartments 201, so that the odor detection device 100 can detect the gases in different refrigeration compartments 201. The air intake valve 143 in this embodiment is a multi-way switch, that is, the switch corresponding to the air intake branch pipe 142 is selectively opened to fill the gas of the corresponding refrigeration compartment 201 into the cavity 18.

[0064] As another preferred embodiment of the odor detection device of the present invention, in order to prevent the humidity of the gas entering the cavity 18 from being too high, the air inlet pipe 14 and / or the auxiliary air inlet pipe 16 both have a pipe body (not shown) and an inlet port located at the end of the pipe body, and the inlet port is the end of the air inlet pipe 14 or the auxiliary air inlet pipe 16 that is away from the shell 10, and the inner diameter of the inlet port is smaller than the inner diameter of the pipe body, that is, the water vapor in the gas is condensed when passing through the inlet port to avoid entering the cavity 18.

[0065] As another preferred embodiment of the odor detection device of the present invention, in order to prevent the humidity of the gas entering the cavity 18 from being too high, a waterproof breathable membrane 17 is provided in the air intake pipe 14 and / or the auxiliary air intake pipe 16 to prevent water vapor from entering the cavity 18.

[0066] like Figure 6 As shown, the gas driving module 40 is used to drive the gas to inflate the cavity 18 through the air inlet 11 (air inlet pipe 14) and / or the auxiliary air inlet 13 (auxiliary air inlet pipe 16), or to discharge the gas in the cavity 18 through the exhaust port 12 (exhaust pipe 15). In the present invention, the gas driving module 40 can be a fan or an exhaust pump.

[0067] In a specific embodiment in which the gas driving module 40 is a fan, the fan is installed near the air inlet pipe 14 and the auxiliary air inlet pipe 16 to drive the gas in the refrigeration chamber 201 or the clean gas outside the refrigeration equipment into the cavity 18. In this embodiment, a first valve (not shown) is provided on the exhaust pipe 15 to prevent the gas in the cavity 18 from leaking out of the exhaust pipe, thereby providing a closed detection space for the odor detection device 100.

[0068] It is understandable that the gas driving module 40 can be disposed in the cavity 18 or can be disposed in conjunction with the intake pipe 14 or the exhaust pipe 15 or the auxiliary intake pipe 16 .

[0069] In a specific embodiment in which the gas driving module 40 is an air pump, the air pump can be disposed in the cavity 18 or on the exhaust pipe 15 to discharge the gas in the cavity 18 from the exhaust pipe.

[0070] In this embodiment, the air intake pipe 14 and the auxiliary air intake pipe 16 are respectively provided with a second valve (not shown in the figure). During the process of vacuum pumping, the external gas is prevented from entering the cavity 18 from the air intake pipe 14 or the auxiliary air intake pipe 16, so that the cavity 18 can be maintained in a near-vacuum state. Alternatively, after the detection air in the cavity 18 is discharged, the second valve on the auxiliary air intake pipe 16 is opened to fill the cavity 18 with clean gas. When not detecting, the cavity 18 is kept in a clean state.

[0071] In this embodiment, the gas driving module 40 is located in the cavity 18. In the embodiment where the cavity 18 is divided into a pre-processing chamber 181 and a detection chamber 182, the gas driving module 40 is located in the pre-processing chamber 181 to prevent interference with the odor sensor 20. In order to further reduce the influence of the vibration generated by the gas driving module 40 when working on the odor sensor, the odor detection device 100 further includes a shockproof member (not shown) attached to the outside of the odor sensor 20.

[0072] As another preferred embodiment of the refrigeration device of the present invention, Figure 8 As shown, the odor detection device 100 also includes a temperature and humidity sensor 50, which is located in the inner cavity 18 and above the odor sensor 20, that is, the temperature and humidity in the detection cavity 182 sensed by the temperature and humidity sensor 50 are the temperature and humidity of the gas detected by the odor sensor 20, ensuring the accuracy of the detection of the odor detection device 100.

[0073] As another preferred embodiment of the refrigeration device of the present invention, Figure 8As shown, the odor detection device 100 also includes a heating module 60 for heating the gas to be detected in the cavity 18. By setting the heating module 60, the gas to be detected entering the cavity 18 can be heated, so that the gas in the cavity 18 can quickly activate the gas molecules to be detected, so that the gas to be detected can be fully diffused to a stable state, thereby improving the sensitivity of the odor sensor 20 during detection.

[0074] Specifically, the heating module 60 is located in the cavity 18, and is used to heat the gas to be detected in the cavity 18. It is understandable that the heating module 60 can also be arranged outside the housing 10 to heat the gas in the cavity 18 through heat transfer.

[0075] The heating module 60 is located near the air inlet 11. In an embodiment of the partition plate included in the odor detection device 100, the heating module 60 is located in the pretreatment chamber 181 to heat the gas to be detected entering the cavity 18. The heated gas to be detected flows to the vicinity of the odor sensor 20 to wait for detection.

[0076] Preferably, the heating module 60 includes a plurality of heating wires connected in parallel with each other. The power of each heating wire can be the same or different. According to the actual temperature in the cavity 18, a heating wire with a suitable power is selected to operate.

[0077] The working process of the heating module 60 in this embodiment is: when the temperature and humidity sensor 50 detects that the temperature in the cavity 18 is lower than the first preset temperature value, the heating module 60 is turned on; if the temperature in the cavity 18 is between the second preset temperature value and the first preset temperature value, the heating module 60 is controlled to output W1 power for heating; if the temperature in the cavity 18 is between the third preset temperature value and the second preset temperature value, the heating module 60 is controlled to output W2 power for heating, wherein the first preset temperature value is greater than the second preset temperature value, the second preset temperature value is greater than the third preset temperature value, and W1 is greater than W2, so as to avoid excessive power of the heating module 60 causing the temperature in the cavity 18 to rise too quickly and become uneven.

[0078] An example of the working process of the heating module 60 is that when the temperature and humidity sensor 50 detects that the temperature in the cavity 18 is lower than 8°C, the heating module 60 is turned on; when the temperature and humidity sensor 50 detects that the temperature in the cavity 18 is between 4°C and 8°C, the heating module 60 is controlled to output 0.2W of power for heating; when the temperature and humidity sensor 50 detects that the temperature in the cavity 18 is between 0°C and 4°C, the heating module 60 is controlled to output 0.4W of power for heating; when the temperature and humidity sensor 50 detects that the temperature in the cavity 18 is between -2°C and 0°C, the heating module 60 is controlled to output 0.8W of power for heating; when the temperature and humidity sensor 50 detects that the temperature in the cavity 18 is less than -2°C, the heating module 60 is controlled to output 1.2W of power for heating.

[0079] As another preferred embodiment of the refrigeration device of the present invention, Fig.12 As shown, the odor detection device 100 also includes a humidifying component 70, and the humidifying component 70 is directly arranged in the cavity 18. In the embodiment where the odor detection device 100 includes a partition plate 30, the humidifying component 70 is located in the pretreatment chamber 181. When the humidity of the gas to be tested in the cavity 18 or the pretreatment chamber 181 does not meet the requirements, the humidifying component 70 is used to increase the humidity of the gas.

[0080] Specifically, the humidifying assembly 70 includes a water tank 71 disposed outside the housing 10, a filter block 72 disposed in the water tank 71, the filter block 72 divides the water tank 71 into a water inlet side 74 and a water outlet side 75, and the humidifying assembly 70 also includes an atomizing portion 73 connected to the water outlet side 75. The atomizing portion 73 atomizes the filtered water in the water tank 71 at the water outlet side 75 and sprays it toward the pretreatment chamber 181 to increase the humidity of the gas in the pretreatment chamber 181.

[0081] In a specific implementation, the humidifying component 70 can utilize the defrosting water of the refrigeration equipment to humidify the gas in the pre-treatment chamber 181 after filtering and atomizing.

[0082] The specific working process of the humidification component 70 is: using the temperature and humidity sensor 50 to detect the humidity in the cavity 18 or the detection cavity 182, when the humidity detected by the temperature and humidity sensor 50 is less than the first preset humidity value, the atomization part 73 is turned on to spray water vapor, when the detected humidity is between the second preset humidity value and the first preset humidity value, the atomization part 73 is controlled to work with a first start-stop ratio; when the detected humidity is between the third preset humidity value and the second preset humidity value, the atomization part 73 is controlled to work with a second start-stop ratio; when the detected humidity is less than the third preset humidity value, the atomization part 73 is controlled to work with a third start-stop ratio, wherein the first start-stop ratio is less than the second start-stop ratio, the second start-stop ratio is less than the third start-stop ratio, and the start-stop ratio is the ratio of the start-up time and the stop-down time of the atomization part 73.

[0083] A specific example of the working process of the humidification component 70 is that when the humidity detected by the temperature and humidity sensor 50 is less than 60%, the atomization part 73 is controlled to work, specifically, when the detected humidity is between 45% and 60%, the atomization part 73 is controlled to work at 1:1; when the detected humidity is between 30% and 45%, the atomization part 73 is controlled to work at 2:1; when the detected humidity is less than 30%, the atomization part 73 is controlled to work at 5:1, wherein the first start-stop ratio is less than the second start-stop ratio, the second start-stop ratio is less than the third start-stop ratio, and the start-stop ratio is the ratio of the start-up time and the stop-time of the atomization part 73.

[0084] As a preferred embodiment of the refrigeration device of the present invention, Figures 9 to 11 As shown, the odor detection device 100 also includes at least one odor separation module 80, which selectively absorbs non-target odors in the gas to be detected to avoid interference of non-target odors with target odors, thereby improving the selectivity and accuracy of detection by the odor sensor 20.

[0085] The odor separation module 80 may be disposed in the air intake pipe 14 or in the cavity 18 , that is, as long as it is on the air intake path of the gas to be detected.

[0086] The odor separation module 80 is preferably disposed in the air intake pipe 14. When the odor detection device 100 includes multiple odor separation modules 80, the odor separation modules 80 are arranged at intervals along the axial direction of the air intake pipe 14 to adsorb non-target gases in sequence.

[0087] Specifically, Fig. 9 As shown, the odor separation module 80 may be an adsorption column 81 filled at intervals in the air intake pipe 14 , and the length of the adsorption column 81 is not less than two-thirds of the length of the air intake pipe 14 to enhance the adsorption effect.

[0088] The adsorption column 81 includes an adsorption filler and fixed parts 811 at both ends of the adsorption filler, wherein the adsorption filler is a porous adsorption material such as silica gel and activated carbon that can adsorb water molecules and interfering gases. The particle size of the adsorption filler is 0-100 microns, and the present invention does not limit the specific shape of the adsorption filler. The fixed part 811 is one or more of a breathable film and / or a net and / or a cotton wool. To enhance the dehumidification effect, a water absorbent such as anhydrous sodium sulfate, anhydrous calcium chloride, etc. can be added to the fixed part 811.

[0089] like Fig.10As shown, the odor separation module 80 can be an adsorption coating 82 that is intermittently coated on the inner wall of the intake pipe 14. The adsorption coating 82 is a gas selective fixed liquid directly coated on the inner wall of the intake pipe 14. Since the area of ​​the inner wall is large, a thinner adsorption film can be formed, and the mass transfer resistance of the gas components between the gas phase and the liquid phase is reduced, the non-target odor separation effect is increased, and the target gas enters the detection cavity 182, thereby improving the selectivity and accuracy of the detection of the odor sensor 20.

[0090] Preferably, the selective fixing liquid includes one or more of polydimethylsiloxane, polyethylene glycol, phenyl-containing polydimethylsiloxane, cyano-containing polymethylsiloxane, trifluoropropyl-containing polymethylsiloxane, and the like.

[0091] Preferably, the thickness of the adsorption coating 82 is 0-200 microns, and the length of the adsorption coating 82 is not less than two-thirds of the length of the intake pipe.

[0092] like Fig.11 As shown, the odor separation module 80 can be an adsorption membrane 83 arranged in the intake pipe 14 at intervals along the axial direction of the intake pipe 14, the adsorption membrane 83 is arranged at any position of the intake pipe 14 along its axial direction, or multiple adsorption membranes 83 are arranged in the intake pipe 14 at intervals along the axial direction of the intake pipe 14.

[0093] Preferably, the adsorption film 83 is disposed at the air inlet end of the air inlet pipe 14 , so that non-target odors are adsorbed relatively early and do not enter the air inlet pipe 14 .

[0094] Preferably, the adsorption film 83 has a thickness of 0 mm-20 mm, and a size no smaller than the inner diameter of the air intake pipe 14 .

[0095] The material of the adsorption film 83 is one or more of polytetrafluoroethylene, polyvinylidene fluoride, and polydimethylsiloxane.

[0096] The end of the adsorption film 83 is the end of the end group modification of the membrane material to improve the binding property of the membrane material with non-target gases, such as amino, hydroxyl and other polar bond modification, which can improve the binding performance with polar gas molecules. For example, MnO2 grows on the surface of the waterproof and breathable membrane, catalyzing the decomposition of ozone and isolating strong oxidizing gas interference.

[0097] Of course, the odor separation module 80 can also be formed by any combination of the adsorption column 81, the adsorption coating 82 and the adsorption membrane 83, and can achieve the technical effect of separating non-target odors.

[0098] like Figure 13 to Figure 14As shown, the odor detection device 100 further includes an exhaust device 90 for treating the gas exhausted from the cavity 18 to avoid direct exhaust to the external environment or the refrigeration chamber 201 , that is, the air in the refrigeration chamber 201 can also be indirectly replaced.

[0099] As another preferred embodiment of the refrigeration device of the present invention, Fig.13 As shown, the exhaust device 90 includes a closed groove 91 for containing an adsorption material 93, and an exhaust pipe 92 connecting the inside and outside of the closed groove 91. The exhaust pipe 15 extends into the closed groove 91, that is, the gas discharged from the exhaust pipe 15 first enters the adsorption material 93 in the closed groove 91, and the gas whose odor is absorbed by the adsorption material 93 is then discharged into the refrigeration room 201 or the external environment outside the refrigeration equipment through the exhaust pipe 92, so as to avoid direct emission of odor.

[0100] In this embodiment, the exhaust pipe 15 includes a vertical section 152 extending to the bottom of the closed groove 91 and a horizontal section 151 connecting the shell 10 and the vertical section 152 to ensure that the exhaust pipe 15 can extend to the bottom of the closed groove 91.

[0101] As another preferred embodiment of the refrigeration device of the present invention, Fig.14 As shown, the exhaust device 90 includes a treatment pipe 94 and an adsorption material 93 filled in the treatment pipe 94. The adsorption material 93 fills the inner space of the treatment pipe 94 along the radial direction of the treatment pipe 94, that is, the gas must pass through the adsorption material 93 when passing through the treatment pipe 94, and the gas will be discharged to the refrigeration room 201 or the outside of the refrigeration equipment after the adsorption material 93 adsorbs the odor.

[0102] It can be understood that the exhaust pipe 15 is connected to the disposal pipe 94 or the exhaust pipe 15 is a part of the disposal pipe 94, both of which can achieve the technical effect of filling the adsorption material 93 therein to absorb odors.

[0103] Specifically, the disposal pipe 94 includes a first section 941 for containing the adsorption material 93, a second section 943 connected to one end of the first section 941, and a third section 942 connected to the other end of the first section 941 or the exhaust pipe 15. The inner diameter of the first section 941 is larger than the inner diameter of the second section 943 or the exhaust pipe 15, and can be filled with more adsorption material 93.

[0104] Furthermore, the disposal tube 94 also includes a transition section 944 connecting the first section 941 and the second section 943 or the third section 942. The inner wall surface of the transition section 944 is an arc surface protruding inward. The arc surface design of the transition section 944 can play a guiding role, which is beneficial for the gas to enter the adsorption material 93 and facilitate the discharge of the gas after passing through the adsorption material 93, and the gas will not be retained in the disposal tube 94, thereby improving the efficiency of gas adsorption.

[0105] As another preferred embodiment of the refrigeration device of the present invention, Figure 1 As shown, the air inlet pipe 14 of the odor detection device 100 connects the cavity 18 with the refrigeration compartment 201, the exhaust pipe 15 connects the cavity 18 with the outside of the refrigeration device, and the auxiliary air inlet pipe 16 connects the cavity 18 with the outside of the refrigeration device. After the odor detection device 100 completes the detection, the detected gas in the cavity 18 is discharged to the outside of the refrigeration device, indirectly replacing the air in the refrigeration compartment 201. At the same time, clean gas is filled into the cavity 18 through the auxiliary air inlet pipe 16 to ensure that the cavity 18 is in a clean environment, the odor sensor 20 will not be contaminated, and the accuracy of the detection is ensured.

[0106] In this embodiment, the odor detection device 100 is located on the side wall or door of the inner tank 200, which is convenient for maintenance and intuitive and visible. Moreover, the entire odor detection device 100 is located in the middle of the refrigeration equipment and is close to each refrigeration compartment 201, which is convenient for detecting the gas environment in different refrigeration compartments 201.

[0107] As another preferred embodiment of the refrigeration device of the present invention, Figure 2 As shown, the odor detection device 100 is located on the top of the inner tank 200 and is integrated with the lighting lamp 300. The odor detection device 100 is flat and does not affect the overall structure of the refrigeration equipment and the normal storage of the storage compartment 201. Moreover, the odor detection device 100 is close to the main control board, and the wiring installation is convenient.

[0108] In this embodiment, the air inlet pipe 14 and the exhaust pipe 15 are respectively arranged at the two ends of the shell 10 in the horizontal direction, so that the air paths of the air inlet pipe 14 and the exhaust pipe 15 are shorter, saving the cost of the odor detection device 100. The exhaust pipe 15 is located in the refrigeration compartment 201 or extends to the outside of the refrigeration equipment. The auxiliary air inlet pipe 16 is arranged at the upper part of the shell 10 and extends to the outside of the refrigeration equipment. The auxiliary air inlet pipe 16 extends from the upper part of the refrigeration equipment to the outside of the refrigeration equipment, and does not affect the appearance of the refrigeration equipment.

[0109] As another preferred embodiment of the refrigeration device of the present invention, Figure 3As shown, the refrigeration equipment also includes a press chamber 400, the odor detection device 100 is arranged in the press chamber 400, the air inlet pipe 14 is located in the insulation layer outside the inner liner 200 and extends upward into the refrigeration chamber 201, and the exhaust pipe 15 and the auxiliary air inlet pipe 16 both extend to the outside of the refrigeration equipment.

[0110] In this embodiment, the odor detection device 100 is located in the press chamber 400, and the exhaust pipe 15 and the auxiliary air intake pipe 16 both extend from the back of the refrigeration equipment and backward to the outside of the refrigeration equipment, which does not affect the appearance of the refrigerator. The temperature in the press chamber 400 is relatively high, which can further activate the gas molecules to be detected, so that the gas to be detected can be fully diffused to a stable state, thereby improving the sensitivity of the odor sensor 20 during detection.

[0111] As another preferred embodiment of the refrigeration device of the present invention, Figure 4 As shown, the refrigeration equipment includes a plurality of refrigeration compartments 201, the air intake pipe 14 includes an air intake main pipe 141 connected to the air inlet 11, a plurality of air intake branches 142 arranged in parallel from the end of the air intake main pipe 141, and an air intake valve 143 arranged at the connection between the air intake main pipe 142 and the air intake branch pipe 143, and the plurality of air intake branches 143 correspond to each of the refrigeration compartments 201 one by one. The odor detection device 100 can selectively extract the gas of a certain refrigeration compartment 201 for detection, so as to detect the gas environment in different refrigeration compartments 201.

[0112] As another preferred embodiment of the refrigeration device of the present invention, the refrigeration device includes a defrost chamber (not shown), a drain pipe (not shown) connected to the lower end of the defrost chamber, the evaporator is located in the defrost chamber, the drain outlet of the drain pipe is located above the water tank 71 and projected downward into the water tank 71, that is, water generated by defrosting of the evaporator is discharged into the water tank 71 through the drain pipe, and is directly used after being filtered by the filter block 72. There is no need to separately treat the defrost water and there is no need to separately add water to the water tank 71, thereby improving the user experience.

[0113] The following is a detailed description of the odor detection method for a refrigeration device of the present invention, taking the odor detection device 100 without a partition plate 30 and the odor sensor 20 being located in the cavity 18 as an example. Accordingly, in a specific implementation manner in which the odor detection device 100 is provided with a partition plate 30, the gas in the detection cavity 182 is detected.

[0114] like Fig.15 and Fig.16 As shown, the odor detection method includes: obtaining a signal whether the gas in the refrigeration compartment 201 needs to be detected; if so, delivering the gas in the refrigeration compartment 201 to the cavity 18 of the odor detection device 100; if not, the refrigeration equipment operates as usual.

[0115] Before the gas in the refrigeration compartment 201 is delivered to the cavity 18 of the odor detection device 100, it is first determined whether the cavity 18 is in a clean state. The determination of whether the cavity 18 is in a clean state specifically includes: obtaining a concentration value D1 of the air in the current refrigeration compartment 201, and determining whether D1 is greater than a first preset threshold value N1. If D1 is greater than N1, a replacement procedure is started to replace the clean gas in the cavity 18 until the cavity 18 is in a clean state. If D1 is not greater than N1, the cavity 18 of the odor detection device 100 is determined to be in a clean state.

[0116] In this embodiment, obtaining the current concentration value D1 of the air in the refrigeration room 201 includes: closing the first valve (not shown) of the exhaust pipe, controlling the fan (not shown) to start to deliver clean gas to the cavity 18, and obtaining the detection value Ra of the odor sensor 20 when the cavity 18 is clean air; delivering the gas in the refrigeration room 201 to the cavity 18 of the odor detection device 100, and obtaining the detection value Rg of the gas entering the cavity 18 detected by the odor sensor 20; then, D1=K*Ra / Rg, where K is a constant coefficient.

[0117] The replacement procedure includes: obtaining a second preset threshold value N2, wherein N2 is greater than N1, taking the integer value M1 of N2 divided by D1, and replacing clean air into the cavity 19 for M1 consecutive times; wherein the second preset threshold value N2 is the maximum value of the clean air concentration or a ratio to the maximum value, and the number of replacements of the clean gas in the cavity 18 can be obtained by the ratio of N2 to D1, and the number M1 is an integer multiple of the ratio of N2 to D1. When the ratio of N2 to D1 is not an integer, it is necessary to execute the replacement procedure one more time to make the cavity 18 reach a clean state.

[0118] After the clean gas in the control cavity 18 is replaced M1 times, the concentration value D2 of the air in the current refrigeration compartment 201 is continuously obtained; and it is determined whether D2 is greater than the first preset threshold value N1. If D2 is greater than N1, the compensation replacement program is started to continue to replace the clean gas for the cavity 18 until the cavity 18 is in a clean state. If D2 is not greater than N1, it is determined that the cavity 18 of the odor detection device 100 is in a clean state. That is, after the clean gas in the cavity 18 is replaced M1 times, the concentration of the gas in the cavity 18 still does not meet the requirement, and the compensation replacement program is continued.

[0119] The compensation replacement procedure includes: replacing the clean gas for the cavity 18 M2 times continuously, and obtaining the concentration value Di of the air in the current refrigeration compartment 201 after each replacement, and determining whether Di is greater than the first preset threshold value N1. If Di is greater than N1, the cavity 18 is determined to be in a clean state after continuously replacing the clean gas for the cavity 18 M3 times; if Di is not greater than N1, the cavity 18 of the odor detection device 100 is determined to be in a clean state. That is, after continuously replacing the clean gas for M2 times in the cavity 18, it still cannot meet the requirement, and it is considered that the cavity 18 is already in a clean state after continuing to replace the clean gas for M3 times.

[0120] The above-mentioned acquisition of the current concentration value Di of the air in the refrigeration compartment 201 includes: the detection value of the clean gas entering the cavity 18 detected by the odor sensor 20 is Rgi; then, Di=K*Ra / Rgi, wherein K is a constant coefficient.

[0121] In the process of determining whether the cavity 18 is in a clean state, the cavity 18 is purified at the same time.

[0122] As a preferred embodiment of the odor detection method of the present invention, the odor detection method also includes purifying the cavity 18, and the purifying treatment of the cavity 18 includes: closing the first valve of the exhaust pipe 15, controlling the fan to start to deliver clean gas to the cavity 18, during which the odor sensor 20 is controlled to detect the gas to be tested in the cavity 18 in real time until the detection result is in a stable state and the detection result value is high. At this time, it is determined that the cavity 18 is full of clean gas and the cavity 18 is in a clean state.

[0123] At this time, when it is determined that the cavity 18 is in a clean state, the odor sensor 20 is controlled to correct the zero point to ensure the validity of the detection result of the odor sensor 20.

[0124] Then, the clean air in the cavity 18 is discharged, and the gas to be tested in the refrigeration chamber 201 is transported into the cavity 18. During this period, the odor sensor 20 is controlled to detect the gas to be tested in the cavity 18 in real time until the detection result is in a stable state, and it is determined that the gas to be tested has filled the cavity 18.

[0125] As another preferred embodiment of the odor detection method of the present invention, the gas driving module 40 is an air pump, and the purification treatment of the cavity 18 includes: closing the second valve (not shown) of the intake pipe 14, controlling the air pump to start to discharge the gas in the cavity 18, and in order to achieve a better purification effect, controlling the auxiliary intake pipe 16 and the air pump to replace the gas in the cavity 18 multiple times, and during each replacement process, controlling the odor sensor 20 to detect the clean gas in the cavity 18 until the detection result is in a stable state, and the cavity 18 is deemed to be in a clean state.

[0126] In this embodiment, the detection results of the odor sensor 20 can be monitored in real time during the process of transporting gas into the cavity 18 to determine whether the cavity 20 is full of gas, or the concentration of the odor of the gas to be detected can be calculated by controlling the volume of the gas to be detected entering the cavity 18.

[0127] Specifically, it includes: obtaining the volume of the cavity 18 and the flow rate of the vacuum pump and calculating the first time t1 required to fill the cavity 18; filling the cavity 18 with the gas to be tested; recording the second time t2 when the gas to be tested is delivered to the cavity 18, and if t2 is not less than t1, it is determined that the gas to be tested has filled the cavity 18; if t2 is less than t1, the dilution factor of the gas to be tested is determined according to the ratio between t2 and t1, or the dilution factor of the gas to be tested is determined according to the ratio of the volume of the gas to be tested in the cavity 18 to the volume of the cavity 18; the dilution factor of the gas to be tested is used to convert the final detection result.

[0128] As another preferred embodiment of the odor detection method of the present invention, before detecting the gas to be detected in the cavity 18, it is first determined whether the gas to be detected in the cavity 18 is within a preset temperature range and a preset humidity range. If so, the odor sensor 20 is controlled to start detection;

[0129] If not, the heating module 60 is controlled to select a suitable power to work according to the detected temperature detected by the temperature and humidity sensing unit 50, and / or the humidification component 70 is controlled to select a suitable work-stop ratio to work according to the detected humidity detected by the temperature and humidity sensing unit 50. The specific control process is referred to in the previous description of the refrigeration device, and will not be repeated one by one.

[0130] After ensuring that the temperature and humidity of the gas to be detected in the cavity 18 meet the requirements, the gas to be detected in the cavity 18 is first left to stand for a first preset time, and then the gas to be detected in the cavity 18 is detected. If the gas to be detected does not fill the cavity 18, the result is recalculated and then output.

[0131] As another preferred embodiment of the odor detection method of the present invention, after the odor sensor 20 finishes detecting the gas in the cavity 18, the gas in the cavity 18 is discharged or the cavity 18 is filled with clean gas to purify the cavity 18. Specifically, when the gas driving module 40 is a blower, clean air from outside the refrigeration device is transported into the cavity 18 through the auxiliary air inlet pipe 16; when the gas driving module 40 is an air pump, the gas in the cavity 18 is pumped out so that the cavity 18 is in a near-vacuum state; or after the gas in the cavity 18 is pumped out, clean air from outside the refrigeration device is transported into the cavity 18 through the auxiliary air inlet pipe 16, and both can achieve purification of the cavity 18.

[0132] In summary, the odor detection method for refrigeration equipment of the present invention purifies the cavity 18 before and after the odor detection to ensure that the gas detected in the cavity 18 is not contaminated or diluted, thereby ensuring the accuracy of the detection result.

[0133] It should be understood that although the present specification is described according to embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0134] The series of detailed descriptions listed above are only specific descriptions of feasible embodiments of the present invention and are not intended to limit the protection scope of the present invention. All equivalent embodiments or changes that do not deviate from the technical spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for detecting odors in refrigeration equipment, characterized in that: The odor detection method comprises: Get the signal whether the gas in the refrigeration room needs to be tested; If yes, determining whether the cavity is in a clean state specifically includes: obtaining a current concentration value D1 of the indoor air in the refrigeration room, determining whether D1 is greater than a first preset threshold value N1, if D1 is greater than N1, starting a replacement procedure to replace the cavity with clean gas until the cavity is in a clean state, if D1 is not greater than N1, determining that the cavity of the odor detection device is in a clean state; transporting the gas in the refrigeration room to the cavity of the odor detection device; The odor sensor of the control cavity detects the gas composition entering the cavity; The gas in the cavity is discharged to make the cavity clean.

2. The odor detection method for refrigeration equipment according to claim 1, characterized in that: Obtaining the current concentration value D1 of the indoor air in the refrigeration room includes: Obtaining the detection value Ra of the odor sensor when the air in the cavity is clean; The gas in the refrigeration compartment is transported to the cavity of the odor detection device, and the detection value Rg of the gas entering the cavity is detected by the odor sensor; Then, D1 = K*Ra / Rg, where K is a constant coefficient.

3. The odor detection method for refrigeration equipment according to claim 2, characterized in that: The replacement procedure includes: obtaining a second preset threshold value N2, wherein N2 is greater than N1, taking an integer value M1 obtained by dividing N2 by D1, and replacing clean air into the cavity for M1 consecutive times; Continue to obtain the current indoor air concentration value D2 of the refrigeration room; Determine whether D2 is greater than a first preset threshold value N1. If D2 is greater than N1, start the compensation replacement program to continue replacing the clean gas for the cavity until the cavity is in a clean state. If D2 is not greater than N1, determine that the cavity of the odor detection device is in a clean state.

4. The odor detection method for refrigeration equipment according to claim 3, characterized in that: The compensation replacement procedure includes: continuously replacing the clean gas for the cavity M2 times, and obtaining the concentration value Di of the current indoor air in the refrigeration room after each replacement, and determining whether Di is greater than a first preset threshold value N1. If Di is greater than N1, then continuously replacing the clean gas for the cavity M3 times, and determining that the cavity is in a clean state; if Di is not greater than N1, then determining that the cavity of the odor detection device is in a clean state.

5. The odor detection method for refrigeration equipment according to claim 4, characterized in that: Obtaining the current concentration value Di of the indoor air in the refrigeration room includes: The detection value of the clean gas entering the cavity detected by the odor sensor is Rgi; Then, Di=K*Ra / Rgi, where K is a constant coefficient.

6. The odor detection method for refrigeration equipment according to any one of claims 1 to 5, characterized in that: The odor detection method also includes: After determining that the cavity is in a clean state, the odor sensor is controlled to correct the zero point, and then the gas in the refrigeration room is transported to the cavity.

7. The odor detection method for refrigeration equipment according to any one of claims 1 to 5, characterized in that: Before detecting the gas to be detected in the cavity, first determine whether the gas to be detected in the cavity is within a preset temperature range and a preset humidity range, and if so, control the odor sensor to start detection; If not, the heating module is controlled to select a suitable power to work according to the detected temperature detected by the temperature and humidity sensing unit, and / or the humidification component is controlled to select a suitable work-stop ratio to work according to the detected humidity detected by the temperature and humidity sensing unit.

8. The odor detection method for refrigeration equipment according to any one of claims 1 to 5, characterized in that: Before detecting the gas to be tested in the cavity, the gas to be tested in the cavity is allowed to stand for a first preset time period.

9. The odor detection method for refrigeration equipment according to any one of claims 1 to 5, characterized in that: After the detection is completed, the gas in the cavity is discharged or the cavity is filled with a cleaning gas to clean the cavity.

10. A refrigeration device, characterized in that: The refrigeration equipment comprises a refrigeration compartment and an odor detection device arranged in the refrigeration compartment. The refrigeration equipment executes the odor detection method for refrigeration equipment according to any one of claims 1 to 9 to detect the gas in the refrigeration compartment.

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