Smell detection method for refrigeration equipment and refrigeration equipment

Abstract

The invention provides an odor detection method for refrigeration equipment. The odor detection method comprises the steps that an odor sensor is controlled to detect gas in a refrigeration chamber, and a plurality of sensing units detect corresponding target gas one by one and output corresponding detection values A1, A2, A3,... An; acquiring average olfaction thresholds S1, S2, S3,... Sn of the human body in one-to-one correspondence to the target gas; and the detection value and the smell threshold value are substituted into a compensation formula of the total value of the smell in the refrigeration chamber. According to the smell detection method, the detection result of the sensing unit is combined with the olfaction threshold value of the human body for calculation, the matching performance of the calculated smell result and the olfaction perception of the human body is improved, a user can obtain the freshness retaining degree of articles in the refrigeration chamber in time, and the use experience of the user is improved.

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] As people's quality of life improves, more kinds of items are stored in refrigeration equipment to keep the items, especially food, fresh. Since the food itself or after fermentation emits a lot of odor, it affects the user experience and even causes cross-taste with other foods. Existing manufacturers install odor sensors in the room to detect the odor value in the room, so that users can obtain the odor situation in the room. However, the taste value of the gas targeted by the odor sensor is different from the human body's olfactory threshold, so that users cannot perceive it in time, affecting the timeliness of disposal.

[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 a refrigeration device, wherein the refrigeration device comprises a refrigeration compartment and an odor detection device located in the refrigeration compartment, wherein the odor detection device comprises a plurality of sensing units respectively used for sensing different odors, and the odor detection method comprises:

[0007] Control the odor sensor to detect the gas in the refrigeration room, so that the plurality of sensing units detect the corresponding target gas one by one and output corresponding detection values ​​A1, A2, A3, ..., An;

[0008] Obtain the average olfactory thresholds S1, S2, S3, ... Sn of the human body corresponding to the above target gases;

[0009] Substitute the above detection values ​​and olfactory thresholds into the compensation formula for the total indoor odor value of the refrigeration room:

[0010] Where k is a constant coefficient.

[0011] Further, judging whether any of the sensing units is working normally specifically includes: if the detection value of the target gas collected by any sensing unit is not less than a first preset threshold or the voltage value of any sensing unit is not greater than a second preset threshold, then, judging that the sensing unit is abnormal;

[0012] Controlling the sensing unit to start a retest procedure, specifically comprising: controlling the sensing unit to retest the corresponding gas m times continuously;

[0013] If the detection results of the sensing unit for m times are normal, then the sensing unit is controlled to continue working;

[0014] If the detection result of the sensing unit is still abnormal after m times of detection, the sensing unit reports an error and outputs the detection value Ai corresponding to the sensing unit as zero.

[0015] Furthermore, after the above-mentioned sensing unit reports an error, the sensing unit is controlled to start a power-off restart procedure, specifically including: controlling the sensing unit to restart n times continuously, and continuing to determine whether the sensing unit is working normally;

[0016] If the sensing unit does not report an error, then the sensing unit is controlled to continue working;

[0017] If the sensing unit still reports an error, it is determined that the sensing unit is faulty and the sensing unit is controlled to stop working.

[0018] Furthermore, when more than 60% of the sensing units of the total number of the sensing units fail, the odor detection device is controlled to stop working.

[0019] Furthermore, it is characterized in that the plurality of sensing units detect corresponding target gases one by one, including:

[0020] The sensing unit is controlled to detect the corresponding target gas M times in succession, and a first preset time length t1 is paused between two adjacent detections. The detection value Ai corresponding to the sensing unit is an average value of the M detection results.

[0021] Furthermore, it is characterized in that the temperature compensation coefficients T1, T2, T3, ... T corresponding to the above target gases are obtained. n ;

[0022] And bring the above temperature compensation coefficient into the compensation formula of the total indoor odor value of the refrigeration room:

[0023] Where k is a constant coefficient.

[0024] Furthermore, a second preset time length t2 is obtained, and a plurality of the sensing units are controlled to detect the corresponding target gas and continue for the second preset time length t2.

[0025] Furthermore, obtaining the second preset time length t2 includes: obtaining a plurality of collection time lengths corresponding to each odor according to the type of the target gas, wherein the second preset time length t2 is a maximum value among the plurality of collection time lengths.

[0026] Furthermore, a plurality of the sensing units are arranged in a matrix, and a difference between the number of rows and the number of columns of the sensing units is no more than 2; or, a plurality of the sensing units are arranged in a circle.

[0027] The present invention also provides a refrigeration device, which detects the gas in the refrigeration room by executing the above-mentioned odor detection method for refrigeration equipment.

[0028] Compared with the prior art, the beneficial effect of the present invention lies in that the odor detection method for refrigeration equipment of the present invention combines the detection results with the human body's olfactory threshold to calculate the matching of the calculated odor results with the human body's olfactory perception, which helps users to know the freshness of the items in the refrigeration equipment in time and improves the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of an embodiment of the refrigeration equipment of the present invention.

[0030] Figure 2 It is a structural schematic diagram of another embodiment of the refrigeration equipment of the present invention.

[0031] Figure 3 It is a structural schematic diagram of another embodiment of the refrigeration equipment of the present invention.

[0032] Figure 4 It is a structural schematic diagram of another embodiment of the refrigeration equipment of the present invention.

[0033] Figure 5 It is a structural schematic diagram of the odor detection device in the refrigeration equipment of the present invention.

[0034] Figure 6 It is a schematic diagram of the arrangement of the sensing units on the odor sensor in the refrigeration equipment of the present invention.

[0035] Figure 7 It is a flow chart of an embodiment of the odor detection method of the present invention.

[0036] Figure 8 It is a flow chart of another embodiment of the odor detection method of the present invention. DETAILED DESCRIPTION

[0037] 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.

[0038] 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".

[0039] 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.

[0040] The present invention provides an odor detection method for a refrigeration device and a refrigeration device, wherein the odor detection method is implemented based on the structure of the refrigeration device, and the refrigeration device is used to execute the odor detection method to detect gas in a refrigeration compartment 201.

[0041] Among them, Figures 1 to 4 As shown, the refrigeration device includes an inner liner 200 forming a refrigeration chamber 201 and an odor detection device 100 located in the refrigeration chamber 201. The inner liner 200 is provided with a groove (not shown), and the odor detection device 100 is installed in the groove to facilitate the installation of the odor detection device 100.

[0042] Specifically, the odor detection device 100 includes a plurality of sensing units 21 for sensing different odors, respectively, so that the user can refer to the detection results of different odors in the refrigeration room.

[0043] As a preferred embodiment of the refrigeration device of the present invention, Figure 5 As shown, the odor detection device 100 includes a shell 10 forming the cavity 18, an odor sensor 20 located in the cavity 18, and the plurality of sensing units 21 are installed on the odor sensor 20. The plurality of sensing units 21 are controlled by the same odor sensor 20, which facilitates control and reduces test errors between the sensing units 21.

[0044] Of course, the odor detection device 100 may also include a plurality of odor sensors 20, and the plurality of sensing units 21 are respectively installed on the corresponding odor sensors 20, that is, one sensing unit 21 is installed on each odor sensor 20, and the technical effect of multiple sensing units 21 detecting the target odor one by one can also be achieved.

[0045] The odor sensor 21 of the present invention is described in detail using a semiconductor sensor as an example. The semiconductor sensor is: the greater the odor concentration of the gas, the smaller the response value of the semiconductor sensor, that is, when detecting clean gas, the response value of the semiconductor sensor is the largest; or during the detection process, the greater the odor concentration of the gas, the greater the voltage signal of the semiconductor sensor, and when detecting clean gas, the voltage signal of the semiconductor sensor is the smallest.

[0046] Preferably, if Figure 6 As shown, the plurality of sensing units 21 are arranged in a matrix, and the difference between the number of rows and the number of columns of the sensing units 21 is not greater than 2, or, the plurality of sensing units 21 are arranged in a circle, that is, the plurality of sensing units 21 are as close as possible, and the detected gases are gases in the same area, thereby avoiding large test errors and providing users with more accurate detection results.

[0047] Preferably, the sensing unit 21 is optionally provided with zinc oxide material, tungsten oxide material, platinum-doped zinc oxide material or other materials to detect corresponding alcohol gases, amine gases, sulfide gases and other gases. The sensing unit 21 can also detect gases with aromatic ester odors.

[0048] As another preferred embodiment of the refrigeration device of the present invention, the odor detection device 100 also includes an air inlet pipe 14 connecting the cavity 18 and the refrigeration chamber 201, an exhaust pipe 15 connecting the cavity 18 and the inside of the refrigeration chamber 201 or the outside of the refrigeration device, and an auxiliary air inlet pipe 16 connecting the cavity 18 and the outside of the refrigeration device. Before the odor detection device 100 detects the gas, the cavity 18 is purified so that the cavity 18 is in a clean state; and after the odor detection device 100 finishes the detection, the detection gas in the cavity 18 is discharged, and the cavity 18 is filled with clean gas through the auxiliary air inlet pipe 16 to ensure that the odor sensor 20 is kept in a clean environment and will not be contaminated, and no detected gas will remain in the cavity 18, thereby ensuring that the cavity 18 is in a clean state and improving the accuracy of the detection result.

[0049] As another preferred embodiment of the refrigeration device of the present invention, Figure 1 As shown, the odor detection device 100 is installed on the side wall of the inner tank 200 or the inner side of the door body, the air inlet pipe 14 connects the refrigeration compartment 201 with the cavity 18, the exhaust pipe 15 connects the cavity 18 with the refrigeration compartment 201 or the outside of the refrigeration equipment, and the auxiliary air inlet pipe 16 connects the cavity 18 with the outside of the refrigeration equipment. When the odor detection device 100 is installed on the refrigeration equipment, the pipeline layout is shorter, which is convenient for installation and saves costs. In this embodiment, the exhaust pipe 15 preferably connects the cavity 18 with the outside of the refrigeration equipment.

[0050] 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.

[0051] As another preferred embodiment of the refrigeration device of the present invention, Figure 3 As shown, the refrigeration device further 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 tank 200 and extends upward to the refrigeration chamber 201, and the exhaust pipe 15 and the auxiliary air inlet pipe 16 both extend to the outside of the refrigeration device. In this embodiment, the odor detection device 100 is located in the press chamber 400, the exhaust pipe 15 and the auxiliary air inlet pipe 16 both extend from the back of the refrigeration device and backward to the outside of the refrigeration device, which does not affect the appearance of the refrigerator, and 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 is fully diffused to a stable state, thereby improving the sensitivity of the odor sensor 20 during detection.

[0052] 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, 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 141 and the air intake branch pipe 142, and the plurality of air intake branches 142 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.

[0053] Based on any of the above refrigeration equipment embodiments, such as Figure 7 and Figure 8 As shown, the odor detection method for refrigeration equipment of the present invention comprises: controlling the odor sensor 20 to detect the gas in the refrigeration compartment 201, and the plurality of sensing units 21 detect the corresponding target gas one by one and output the corresponding detection values ​​A1, A2, A3, ... An; obtaining the average olfactory thresholds S1, S2, S3, ... Sn corresponding to the above target gases by the human body; bringing the above detection values ​​and olfactory thresholds into the compensation formula of the total odor value in the refrigeration compartment:

[0054] Where k is a constant coefficient.

[0055] The odor detection method for refrigeration equipment of the present invention improves the matching of the calculated odor result and the human olfactory perception by combining the detection result with the human olfactory threshold, which helps the user to obtain the freshness of the items in the refrigeration room 201 in time and improves the user's use experience. Among them, the setting of k allows the user to intuitively understand the freshness of the items in the refrigeration room 201.

[0056] It is understandable that the total odor value includes but is not limited to being directly displayed on the display screen of the refrigeration device and transmitting the data to the user's terminal device.

[0057] During the process of the sensing unit 21 detecting gas, it is first determined whether any of the sensing units 21 is operating normally. Figure 8 As shown, it specifically includes: if the detection value of the target gas collected by any of the sensing units 21 is not less than the first preset threshold or the voltage value of any of the sensing units is not greater than the second preset threshold, it is determined that the sensing unit 21 is abnormal; if the detection value of the target gas collected by any of the sensing units 21 is less than the first preset threshold or the voltage value of any of the sensing units 21 is greater than the second preset threshold, the sensing unit 21 is normal, and the sensing unit 21 is controlled to continue testing.

[0058] Then, the sensing unit 21 is controlled to start a retest procedure, and the retest procedure includes: controlling the sensing unit 21 to retest the corresponding gas for m consecutive times to eliminate the possibility that the sensing unit 21 has an abnormality; after the retest procedure is completed, judging whether the sensing unit 21 is working normally, if the sensing unit has no abnormality in the m-times detection results, then the sensing unit 21 is controlled to continue working; if the sensing unit has still an abnormality in the m-times detection results, then the sensing unit 21 reports an error and outputs the detection value Ai corresponding to the sensing unit 21 as zero, that is, the detection value of the sensing unit 21 is unreliable, and the detection result of the sensing unit 21 is not reflected in the total odor value.

[0059] Furthermore, after the above-mentioned sensing unit 21 reports an error, the sensing unit 21 is controlled to start a power-off and restart procedure to determine whether the sensing unit 21 is working normally, and the power-off and restart procedure includes: controlling the sensing unit 21 to restart and restart continuously for n times, that is, controlling the sensing unit 21 to power off and restart, and controlling the sensing unit 21 to continue to detect the corresponding gas to eliminate the possibility that the electrical connection or communication connection of the sensing unit 21 may cause the error of the sensing unit 21.

[0060] If the sensing unit 21 does not report an error for n consecutive times, it is determined that the sensing unit 21 can be used normally, and the sensing unit 21 is controlled to continue working; if the sensing unit 21 still reports an error, it is determined that the sensing unit 21 has a fault, and the sensing unit 21 is controlled to stop working, wherein the interval between each restart is the third preset time length t3, and the sensing unit 21 can be restarted after being fully cooled.

[0061] When more than 60% of the sensing units 21 fail, the odor detection device 100 is controlled to stop working and an alarm is issued to remind the user to check or repair the failure.

[0062] As a preferred embodiment of the odor detection method of the present invention, the plurality of sensing units 21 detect the corresponding target gas one by one, including: controlling the sensing unit 21 to continuously detect the corresponding target gas M times, and the interval detection time is a first preset time t1, then, the detection value Ai corresponding to the sensing unit 21 is the average value of the M detection results, so as to eliminate the test error generated during the testing process of the sensing unit 21, wherein the first preset time t1 is 20ms as an example.

[0063] As another preferred embodiment of the odor detection method of the present invention, the temperature compensation coefficients T1, T2, T3, ... T corresponding to the above target gases are obtained. n ; and bring the above temperature compensation coefficient into the compensation formula of the total indoor odor value of the refrigeration room, Wherein, k is a constant coefficient. Since the stable states of gas molecules of different odors are different at different temperatures, the temperature compensation coefficient of each target gas is combined with the calculation of the total odor value to further optimize the total odor value. The total odor value can more intuitively reflect the odor situation in the refrigeration compartment 201.

[0064] As another preferred embodiment of the odor detection method of the present invention, during the detection process of the odor detection device 100, considering that the collection time of each target odor is different, the collection time needs to take into account the time of all target odors. Specifically, a second preset time t2 is obtained; the odor sensor is controlled to detect the gas in the refrigeration compartment and continue for the second preset time to eliminate the influence of the collection time on different odors.

[0065] Among them, obtaining the second preset time length t2 includes: according to the type of the above-mentioned target gas, obtaining several collection time lengths corresponding to each odor, wherein the second preset time length t2 is the maximum value of the several collection time lengths, so that each sensing unit 21 can fully collect the corresponding target gas.

[0066] The following is a specific example to further illustrate the odor detection method of the present invention. Among the plurality of sensing units 21, sensing unit No. 1 is provided with zinc oxide material for detecting alcohol gas, and the human olfactory threshold for alcohol is obtained to be approximately 0.5; sensing unit No. 2 is provided with tungsten oxide material for detecting amine gas, and the human olfactory threshold for amine is obtained to be approximately 0.001; sensing unit No. 3 is provided with platinum-doped zinc oxide material for detecting sulfide gas, and the human olfactory threshold for sulfide is obtained to be approximately 0.0001; k is taken as 0.6, and the total odor value is: Degree = (2S1 + 100S2 + 1000S3) * 0.6.

[0067] In the above example, the human olfactory threshold for sulfide corresponding to sensing unit No. 3 is the lowest. In order to make the human sense of smell consistent with the displayed value, in the display of the total odor value, sensing unit No. 3 accounts for the highest proportion in the calculation, that is, the output result of sensing unit No. 3 is increased to allow the user to obtain a relatively strong odor of sulfide in the refrigeration compartment 201.

[0068] In summary, the odor detection method for refrigeration equipment of the present invention improves the matching between the calculated odor result and the human olfactory perception by combining the detection result with the human olfactory threshold, which helps the user to know the freshness of the items in the refrigeration compartment 201 in time and improves the user experience.

[0069] 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.

[0070] 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 refrigeration equipment includes a refrigeration compartment and an odor detection device located in the refrigeration compartment, wherein the odor detection device includes a plurality of sensing units respectively used to sense different odors, and the odor detection method includes: Control the odor sensor to detect the gas in the refrigeration room, so that the plurality of sensing units detect the corresponding target gas one by one and output corresponding detection values ​​A1, A2, A3, ..., An; Obtain the average olfactory thresholds S1, S2, S3, ... Sn of the human body corresponding to the above target gases; Substitute the above detection values ​​and olfactory thresholds into the compensation formula for the total indoor odor value of the refrigeration room: Where k is a constant coefficient.

2. The odor detection method for refrigeration equipment according to claim 1, characterized in that: Determining whether any of the sensing units is working normally specifically includes: if the detection value of the target gas collected by any of the sensing units is not less than a first preset threshold or the voltage value of any of the sensing units is not greater than a second preset threshold, then determining that the sensing unit is abnormal; Controlling the sensing unit to start a retest procedure, specifically comprising: controlling the sensing unit to retest the corresponding gas m times continuously; If the detection results of the sensing unit for m times are normal, then the sensing unit is controlled to continue working; If the detection result of the sensing unit is still abnormal after m times of detection, the sensing unit reports an error and outputs the detection value Ai corresponding to the sensing unit as zero.

3. The odor detection method for refrigeration equipment according to claim 2, characterized in that: After the sensing unit reports an error, the sensing unit is controlled to start a power-off restart procedure, specifically including: controlling the sensing unit to restart n times continuously, and continuing to determine whether the sensing unit is working normally; If the sensing unit does not report an error, then the sensing unit is controlled to continue working; If the sensing unit still reports an error, it is determined that the sensing unit is faulty and the sensing unit is controlled to stop working.

4. The odor detection method for refrigeration equipment according to claim 3, characterized in that: When more than 60% of the sensing units in the total number of the sensing units fail, the odor detection device is controlled to stop working.

5. The odor detection method for refrigeration equipment according to any one of claims 1 to 4, characterized in that: The plurality of sensing units detecting corresponding target gases one by one comprises: The sensing unit is controlled to detect the corresponding target gas M times in succession, and a first preset time length t1 is paused between two adjacent detections. The detection value Ai corresponding to the sensing unit is an average value of the M detection results.

6. The odor detection method for refrigeration equipment according to any one of claims 1 to 4, characterized in that: Obtain the temperature compensation coefficients T1, T2, T3, ... T corresponding to the above target gases n ; And bring the above temperature compensation coefficient into the compensation formula of the total indoor odor value of the refrigeration room: Where k is a constant coefficient.

7. The odor detection method for refrigeration equipment according to any one of claims 1 to 4, characterized in that: A second preset time length t2 is obtained, and a plurality of the sensing units are controlled to detect the corresponding target gas and continue for the second preset time length t2.

8. The odor detection method for refrigeration equipment according to claim 7, characterized in that: Acquiring the second preset time length t2 includes: acquiring a number of collection time lengths corresponding to each odor according to the type of the target gas, wherein the second preset time length t2 is a maximum value among the number of collection time lengths.

9. The odor detection method for refrigeration equipment according to any one of claims 1 to 4, characterized in that: The sensing units are arranged in a matrix, and the difference between the number of rows and the number of columns of the sensing units is no more than 2; or, the sensing units are arranged in a circle.

10. A refrigeration device, characterized in that: The refrigeration device detects the gas in the refrigeration room by executing the odor detection method for refrigeration equipment according to any one of claims 1 to 9.

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