A showcase and a method of controlling an electric damper of a showcase

Abstract

The application discloses a display cabinet and an electric air door control method of the display cabinet. An electric air door is arranged on an exhaust hole of the display cabinet. After the display cabinet is powered on, if a door body is opened, the electric air door is controlled to be opened, and a first judgment operation is performed. It is judged whether the door body is closed within a first preset time length after the door body is opened. If the judgment result of the first judgment operation is yes, a second judgment operation is performed. It is judged whether the door body is opened within a second preset time length after the door body is closed. If the judgment result of the second judgment operation is yes, the first judgment operation is performed. If the judgment result of the second judgment operation is no, the electric air door is controlled to be closed after a third preset time length, and the electric air door is controlled to be opened until the door body is opened. The first judgment operation is performed. If the judgment result of the first judgment operation is no, the electric air door is controlled to be closed. By adopting the application, the problem of negative pressure of the display cabinet can be solved, and the negative influence caused by long-time communication between the environment in the cabinet and the outside world can be avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display cabinets, in particular to a display cabinet and an electric air door control method of the display cabinet. BACKGROUND

[0002] The display cabinet is a display table provided for display of articles and has a protection function. At present, the display cabinet develops towards large capacity and large display area. With the increase of the display cabinet door body and capacity, the change of the gas temperature and density in the display cabinet may cause the generation of negative pressure, resulting in the difficulty in opening the door of the display cabinet. For example, when the articles displayed in the display cabinet have a refrigeration requirement, a refrigeration system is arranged to provide cold quantity for the internal storage space of the display cabinet. When the display cabinet is closed, the refrigeration is started, which causes the temperature in the display cabinet to drop. After the door body is opened, the hot air outside enters the cabinet. After the door is closed, the hot air shrinks when meeting the cold air, thereby generating negative pressure, making it difficult to open the door of the display cabinet, especially for the weak and small groups such as the elderly, women and children.

[0003] In the prior art, the conventional display cabinet solves the negative pressure problem by arranging an exhaust hole. However, in the implementation of the present application, the inventor finds that the prior art at least has the following problems: the exhaust hole of the conventional display cabinet is in a normally open state, which easily causes the cold air to sink and leak cold from the exhaust hole, affecting the heat preservation of the display cabinet and increasing the energy consumption. Some display cabinets use a balance valve to solve the negative pressure problem, but the balance efficiency is low and the balance time is long, so it is difficult to better solve the problem of short opening interval of the display cabinet and difficulty in opening the door due to negative pressure. SUMMARY

[0004] The purpose of the embodiments of the present application is to provide a display cabinet and an electric air door control method of the display cabinet, which can effectively solve the problem of difficulty in opening the door body caused by negative pressure in the display cabinet, avoid the negative influence of the long-time communication between the environment in the display cabinet and the external environment on the display cabinet or the articles in the display cabinet, and improve the user experience.

[0005] To achieve the above-mentioned purpose, the embodiments of the present application provide a display cabinet, comprising:

[0006] a cabinet body provided with a door body and an exhaust hole;

[0007] an electric air door arranged in the exhaust direction of the exhaust hole;

[0008] a controller configured to:

[0009] After the display cabinet is powered on, if the door body is opened, the electric air door is controlled to be opened, and a first judgment operation is performed: whether the door body is closed within a first preset time length after the door body is opened.

[0010] If the result of the first determining operation is yes, a second determining operation is performed to determine whether the door is opened within a second preset time period after the door is closed;

[0011] If the result of the second determining operation is yes, the first determining operation is performed.

[0012] If the result of the second determining operation is no, the electric damper is controlled to be closed after a third preset time period, and the electric damper is controlled to be opened until the door is opened, and the first determining operation is performed.

[0013] If the result of the first determining operation is no, the electric damper is controlled to be closed.

[0014] As an improvement of the above-mentioned scheme, after the result of the first determining operation is no, the controller is further configured to:

[0015] perform a third determining operation to determine whether the door is closed within a fourth preset time period after the door is opened; the fourth preset time period is greater than the first preset time period.

[0016] If the result of the third determining operation is yes, the electric damper is controlled to be opened when the door is closed, and the second determining operation is performed again.

[0017] If the result of the third determining operation is no, a preset alarm information pushing operation is performed to remind a user to close the door.

[0018] After the preset alarm information pushing operation is performed to remind the user to close the door, the electric damper is controlled to be opened until the door is closed, and the second determining operation is performed again after the door is closed.

[0019] As an improvement of the above-mentioned scheme, the controller is further configured to:

[0020] If the door is closed after the showcase is powered on, the electric damper is controlled to be closed.

[0021] After the door is closed after the showcase is powered on, the electric damper is controlled to be opened until the door is opened, and the first determining operation is performed after the door is opened.

[0022] As an improvement of the above-mentioned scheme, the showcase further comprises a door switch detection device configured to detect a running state of the door; wherein the running state is opened or closed.

[0023] The controller is further configured to:

[0024] real-time acquisition of the running state of the door body detected by the door switch detection device.

[0025] As an improvement of the above scheme, the door switch detection device comprises a magnet and a magnetic sensitive switch; the magnet is arranged on the door body, the magnetic sensitive switch is arranged on the cabinet body, and the installation positions of the magnet and the magnetic sensitive switch are adjacent when the door body is closed; the magnetic sensitive switch is in a closed state when it is in the effective magnetic field of the magnet; the magnetic sensitive switch is in an open state when it is not in the effective magnetic field of the magnet.

[0026] Then, the real-time acquisition of the running state of the door body detected by the door switch detection device is specifically:

[0027] detecting the opening and closing state of the magnetic sensitive switch; wherein the opening and closing state is an open state or a closed state;

[0028] when the magnetic sensitive switch is in the closed state, it is determined that the door body is closed;

[0029] when the magnetic sensitive switch is in the open state, it is determined that the door body is opened.

[0030] The embodiment of the application also provides an electrically-controlled air door control method of a display cabinet, the display cabinet comprising: a cabinet body provided with a door body and an exhaust hole; and an electrically-controlled air door arranged in the exhaust direction of the exhaust hole.

[0031] The method comprises:

[0032] After the display cabinet is powered on, if the door body is opened, the electrically-controlled air door is controlled to be opened, and a first determination operation is performed: whether the door body is closed within a first preset time period after the door body is opened is determined.

[0033] If the determination result of the first determination operation is yes, a second determination operation is performed: whether the door body is opened within a second preset time period after the door body is closed is determined.

[0034] If the determination result of the second determination operation is yes, the first determination operation is performed.

[0035] If the determination result of the second determination operation is no, after a third preset time period elapses, the electrically-controlled air door is controlled to be closed, and the electrically-controlled air door is controlled to be opened when the door body is opened, and the first determination operation is performed.

[0036] If the determination result of the first determination operation is no, the electrically-controlled air door is controlled to be closed.

[0037] As an improvement of the above-mentioned solution, after the electric damper is controlled to close when the door body is closed, the method further comprises:

[0038] performing a third determining operation to determine whether the door body is closed within a fourth preset time period after the door body is opened, the fourth preset time period being longer than the first preset time period;

[0039] if the third determining operation determines that the door body is closed, the electric damper is controlled to open, and the second determining operation is performed again;

[0040] if the third determining operation determines that the door body is not closed, a preset alarm information pushing operation is performed to remind a user to close the door body;

[0041] after the preset alarm information pushing operation is performed to remind the user to close the door body, the method waits until the door body is closed, and after the door body is closed, the electric damper is controlled to open, and the second determining operation is performed again.

[0042] As an improvement of the above-mentioned solution, the method further comprises:

[0043] after the showcase is powered on, if the door body is closed, the electric damper is controlled to close;

[0044] after the showcase is powered on, if the door body is closed, the electric damper is controlled to close, and then the method waits until the door body is opened, and after the door body is opened, the electric damper is controlled to open, and the first determining operation is performed.

[0045] As an improvement of the above-mentioned solution, the showcase further comprises a door switch detection device configured to detect a running state of the door body, wherein the running state is open or closed.

[0046] The method further comprises:

[0047] the running state of the door body detected by the door switch detection device is acquired in real time.

[0048] As an improvement of the above-mentioned solution, the door switch detection device comprises a magnet and a magnetic sensitive switch, the magnet is arranged on the door body, the magnetic sensitive switch is arranged on the cabinet body, and the installation positions of the magnet and the magnetic sensitive switch are adjacent when the door body is closed; the magnetic sensitive switch is in a closed state when the magnetic sensitive switch is in an effective magnetic field of the magnet; the magnetic sensitive switch is in an open state when the magnetic sensitive switch is not in the effective magnetic field of the magnet.

[0049] Then, the running state of the door body detected by the door switch detection device is acquired in real time, specifically:

[0050] The open and close state of the magnetic sensitive switch is detected, wherein the open and close state is a disconnected state or a closed state.

[0051] When the magnetic sensitive switch is in the closed state, it is determined that the door body is closed.

[0052] When the magnetic sensitive switch is in the disconnected state, it is determined that the door body is opened.

[0053] Compared with the prior art, the display cabinet and the control method of the electric air door of the display cabinet disclosed in the embodiment of the application, by setting an electric air door on the exhaust hole of the display cabinet, after the display cabinet is powered on, if the door body is opened, the electric air door is controlled to be opened, and a first judgment operation is performed: whether the door body is closed within a first preset time period after the door body is opened; if the judgment result of the first judgment operation is yes, a second judgment operation is performed: whether the door body is opened within a second preset time period after the door body is closed; if the judgment result of the second judgment operation is yes, the first judgment operation is performed; if the judgment result of the second judgment operation is no, the electric air door is controlled to be closed after a third preset time period, and the electric air door is controlled to be opened when the door body is opened, and the first judgment operation is performed; if the judgment result of the first judgment operation is no, the electric air door is controlled to be closed. By using the technical means of the embodiment of the application, the running state of the door body of the display cabinet is detected in real time to control the opening or closing of the electric air door, the opening and closing control of the exhaust hole is realized, so that the air pressure balance preparation of the environment in the display cabinet is made before the door body of the display cabinet is opened, not only the negative pressure problem in the display cabinet can be quickly solved, but also the negative effects caused by the long-term opening of the exhaust hole of the display cabinet, such as the loss of refrigeration capacity in the display cabinet, the increase of energy consumption of the display cabinet, or the long-term contact between the goods in the display cabinet and the air leading to deterioration, etc. can be avoided. BRIEF DESCRIPTION OF DRAWINGS

[0054] Figure 1 is a structural schematic view of a display cabinet in a first embodiment provided by the embodiment of the application;

[0055] Figure 2 is a rear view of a display cabinet in a first embodiment provided by the embodiment of the application;

[0056] Figure 3 is a flowchart of the work performed by the controller in a first embodiment provided by the embodiment of the application;

[0057] Figure 4is a flowchart of the work performed by the controller in the second embodiment of the present application;

[0058] Figure 5 is a flowchart of the work performed by the controller in the third embodiment of the present application;

[0059] Figure 6 is a flowchart of the work performed by the controller in the fourth embodiment of the present application;

[0060] Figure 7 is a structural schematic diagram of the showcase in the second embodiment of the present application;

[0061] Figure 8 is a flowchart of the work performed by the controller in the fifth embodiment of the present application;

[0062] Figure 9 is a flowchart of the electrically-operated air door control method of the showcase in the first embodiment of the present application;

[0063] Figure 10 is a flowchart of the electrically-operated air door control method of the showcase in the second embodiment of the present application. DETAILED DESCRIPTION

[0064] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0065] Referring to Figure 1 and Figure 2 , Figure 1 is a structural schematic diagram of the showcase in the first embodiment of the present application, Figure 2 is a rear view of the showcase in the first embodiment of the present application. The present application provides a showcase 10, which comprises a cabinet 11. The cabinet 11 is provided with a door 12, which can be opened or closed manually by a user, or automatically by the user through the man-machine interaction module and the communication with the showcase 10. The user can put or take out the goods in the showcase 10 by opening the door 12. The cabinet 11 is further provided with an exhaust hole 13, which is configured to connect the internal environment of the showcase 10 with the external environment, thereby avoiding the negative pressure in the showcase.

[0066] The display cabinet 10 further comprises an electric air door 14 arranged in the air exhaust direction of the air exhaust hole 13. By controlling the opening and closing of the electric air door 14, the opening and closing of the air exhaust hole 13 can be realized, so as to adjust the communication state between the internal environment of the display cabinet 10 and the external environment.

[0067] It should be noted that the display cabinet 10 can be used to store different kinds of articles according to the needs of users, for example, used to store wine, medicine or food, etc. Moreover, the display cabinet 10 can also be additionally provided with other auxiliary structures according to the storage needs of the stored articles.

[0068] For example, when the articles stored in the display cabinet 10 have refrigeration needs, the display cabinet 10 is further connected with a refrigeration system, and refrigeration operation is performed through the refrigeration system to provide cold energy for the internal storage environment of the display cabinet 10, so as to maintain the internal environment of the display cabinet 10 at a constant low temperature state. Optionally, the refrigeration system is composed of a compressor, a condenser, a drying filter, a capillary tube and an evaporator, and the working composition of the refrigeration system includes a compression process, a condensation process, a throttling process and an evaporation process.

[0069] The display cabinet 10 further comprises a controller 15 connected with the electric air door 14. Referring to Figure 3 is a flowchart of the work performed by the controller in the first embodiment. The controller 15 is used to execute steps S11 to S15:

[0070] S11, after the display cabinet is powered on, if the door body is opened, the electric air door is controlled to be opened, and a first judgment operation is performed: whether the door body is closed within a first preset time length after the door body is opened;

[0071] S12, if the judgment result of the first judgment operation is yes, a second judgment operation is performed: whether the door body is opened within a second preset time length after the door body is closed;

[0072] S13, if the judgment result of the second judgment operation is yes, the first judgment operation is executed;

[0073] S14, if the judgment result of the second judgment operation is no, the electric air door is controlled to be closed after a third preset time length, and the electric air door is controlled to be opened when the door body is opened, and the first judgment operation is executed;

[0074] S15, if the judgment result of the first judgment operation is no, the electric air door is controlled to be closed.

[0075] In this embodiment of the invention, after the display cabinet 10 is powered on, the controller 15 first determines whether the initial operating state of the door 12 is open or closed. If the door 12 is open, the controller also controls the electric damper 14 to be open, allowing the interior environment of the display cabinet 10 to communicate with the external environment. Afterwards, if the user closes the door, since the electric damper is open, the interior environment can communicate with the external environment through the exhaust vent 13, preventing negative pressure from forming inside the display cabinet and facilitating easy opening of the door by the user.

[0076] When the display cabinet is powered on and both the door 12 and the electric damper 14 are in the open state, the controller 15 performs the first judgment operation, that is, to determine whether the door 12 is closed within the first preset time t1 after the door 12 is opened.

[0077] In the first implementation scheme, if it is determined that the door 12 is closed within the first preset time t1, that is, the time t experienced by the door 12 from opening to closing satisfies t≤t1, then it is further determined whether the door 12 is reopened within the second preset time t2 after the door 12 is closed.

[0078] In the first case of the first implementation scheme, if the door 12 is opened again within the second preset time t2, and the door 12 is open and the electric damper is open, then the electric damper 14 is kept open, and the first judgment operation is re-executed, that is, it is judged whether the door 12 is closed within the first preset time t1 after the door 12 is opened, and according to the judgment result of the first judgment operation, it jumps to step S12 or S15 to perform the judgment on the door 12 or the control on the electric damper 14.

[0079] In the second scenario of the first implementation scheme, if the door 12 is not reopened within the second preset time t2 (at which point the door 12 is closed and the electric damper is open), then after the third preset time t3, the electric damper 14 is controlled to close. This prevents the internal environment of the display case 10 from being connected to the external environment for an extended period through the exhaust vent 13, thus avoiding negative impacts on the display case or the items inside. For example, this could lead to loss of cooling capacity, increased energy consumption, or deterioration of the items due to prolonged contact with air. After the electric damper 14 is closed, the controller 15 monitors the operating status of the door 12 in real time. If the door 12 reopens, the controller simultaneously opens the electric damper 14, allowing the internal environment to connect with the external environment through the exhaust vent 13. This prevents negative pressure from forming inside the display case, making it easier for users to open the door. Then, the first judgment operation is executed again, that is, it is judged whether the door 12 is closed within the first preset time t1 after the door 12 is opened, and according to the judgment result of the first judgment operation, it jumps to step S12 or S15 to perform the judgment on the door 12 or the control on the electric damper 14.

[0080] In the first implementation scheme, if it is determined that the door 12 has not been closed within the first preset time period t1, the controller 15 directly controls the electric damper 14 to close.

[0081] Optionally, the first preset duration t1 is 30 seconds, the second preset duration t2 is 15 seconds, and the third preset duration t3 is 15 seconds.

[0082] It is understood that the values ​​of the first preset duration t1, the second preset duration t2, and the third preset duration t3 are merely examples and can be set and adjusted according to actual circumstances, and do not constitute a limitation of the present invention.

[0083] This invention provides a display cabinet with an electric damper installed on its exhaust vent. When the display cabinet is powered on, if the door is open, the electric damper is controlled to open, and a first judgment operation is performed: determining whether the door has closed within a first preset time period after it has opened; if the first judgment operation is successful, a second judgment operation is performed: determining whether the door has opened within a second preset time period after it has closed; if the second judgment operation is successful, the first judgment operation is performed; if the second judgment operation is unsuccessful, the electric damper is controlled to close after a third preset time period, and the process waits until the door opens, then the electric damper is controlled to open, and the first judgment operation is performed; if the first judgment operation is unsuccessful, the electric damper is controlled to close. By employing the technical means of this invention, the opening and closing of the electric damper is controlled by real-time detection of the operating status of the display cabinet door, thereby achieving control over the opening and closing of the exhaust vent. This allows for the preparation of air pressure balance within the display cabinet before the door is opened, which not only quickly resolves the negative pressure problem inside the display cabinet but also prevents the exhaust vent from being open for extended periods, thus avoiding negative impacts on the display cabinet or the items inside, such as loss of cooling capacity, increased energy consumption, or deterioration of items due to prolonged contact with air.

[0084] For a preferred embodiment, see Figure 4 This is a flowchart illustrating the operation performed by the controller in the second implementation of this invention. In step S15, that is, after controlling the electric damper to close if the result of the first judgment operation is negative, the controller is further configured to execute steps S16 to S18:

[0085] S16. Perform the third judgment operation: determine whether the door is closed within a fourth preset time period after the door is opened;

[0086] S17. If the result of the third judgment operation is yes, then when the door is closed, control the electric damper to open and re-execute the second judgment operation.

[0087] S18. If the result of the third judgment operation is negative, then the preset alarm information push operation is executed to remind the user to close the door.

[0088] Furthermore, if the result of the first judgment operation is negative, that is, if the door 12 is not closed within the first preset time t1, the controller 15 performs the third judgment operation, that is, to determine whether the door 12 is closed within the fourth preset time t4 after the door 12 is opened.

[0089] It should be noted that the fourth preset duration t4 is longer than the first preset duration t1. Optionally, the fourth preset duration t4 is 300 seconds.

[0090] It is understood that the value of the fourth preset duration t4 is only an example, and it can be set and adjusted according to the actual situation, and does not constitute a limitation of the present invention.

[0091] In the first case, if it is determined that the door 12 is closed within the fourth preset time t4, that is, the time t experienced by the door 12 from opening to closing satisfies t1≤t≤t4, then when the door 12 is closed, the electric air door 14 is simultaneously controlled to open so as to balance the negative pressure in the display cabinet 10, and the second judgment operation is re-executed, that is, to determine whether the door 12 is opened within the second preset time after the door 12 is closed, and according to the judgment result of the second judgment operation, the process jumps to step S13 or S14 accordingly.

[0092] In the second case, if it is determined that the door 12 is not closed within the fourth preset time t4, it indicates that the opening time of the door 12 is too long (generally during the process of the user storing items in the display cabinet). In order to avoid the negative impact of the long-term connection between the environment inside the cabinet and the external environment on the display cabinet or the items inside the display cabinet, such as excessive cold leakage of the display cabinet, it is necessary to perform the corresponding alarm information push operation to remind the user to close the door of the display cabinet.

[0093] Optionally, the preset alarm information push operation is as follows:

[0094] The first method is to control the sound module of the display case to play a preset alarm sound, such as setting a buzzer and controlling the buzzer to play a siren sound.

[0095] The second method is to control the display module of the display cabinet to display preset alarm information, such as setting an LED light module and controlling the LED light to flash.

[0096] Of course, the alarm information push operation is not limited to the two methods mentioned above. Other alarm information push methods or combinations of the above methods can also be used, which will not affect the beneficial effects of the present invention.

[0097] For a preferred embodiment, see Figure 5 This is a flowchart illustrating the operation performed by the controller in the third implementation of this invention. In step S18, that is, after the third judgment operation results in a negative result, a preset alarm information push operation is executed to remind the user to close the door 12, the controller 15 is further configured to execute step S19:

[0098] S19. Wait until the door is closed, and after the door is closed, control the electric damper to open and re-execute the second judgment operation.

[0099] In this embodiment of the invention, after the controller 15 executes the alarm information push operation, the user receives an alarm prompt and then closes the door 12 of the display cabinet. Then, when the door 12 is closed, the controller 15 simultaneously controls the electric damper 14 to open, so as to balance the negative pressure inside the display cabinet 10, and re-executes the second judgment operation, that is, to determine whether the door 12 has opened within a second preset time after it has closed, and according to the judgment result of the second judgment operation, jumps to step S13 or S14 accordingly.

[0100] By employing the technical means of this invention, and through the judgment of overdue closing of the display cabinet door, the negative impact of prolonged opening of the display cabinet door on the display cabinet or the items inside, caused by prolonged contact between the internal and external environments, can be reduced. Furthermore, this solution controls the opening and closing of the electric damper according to the door's operating status, effectively solving the negative pressure problem inside the display cabinet and preventing the negative impact of prolonged opening of the exhaust vent on the display cabinet or the items inside, which would otherwise result in prolonged contact between the internal and external environments.

[0101] For a preferred embodiment, see Figure 6 This is a flowchart illustrating the operation performed by the controller in the fourth implementation of this invention. The controller is also used to execute steps S21 to S22:

[0102] S21. After the display cabinet is powered on, if the door is closed, the electric damper is controlled to close.

[0103] S22. After the display cabinet is powered on, if the door is closed, control the electric damper to close, wait until the door opens, and after the door opens, control the electric damper to open and execute the first judgment operation.

[0104] In this embodiment of the invention, after the display cabinet 10 is powered on, the controller 15 first determines whether the initial operating state of the door 12 is open or closed. If the door 12 is closed, the controller also controls the electric damper 14 to be closed. Then, if the door 12 is opened by a user, the controller controls the electric damper 14 to open accordingly. Afterwards, the first determination operation is performed, that is, determining whether the door 12 closes within a first preset time t1 after it is opened.

[0105] Next, if the result of the first judgment operation is yes, the second judgment operation is executed: determine whether the door is opened within a second preset time after the door is closed; if the result of the second judgment operation is yes, the first judgment operation is executed; if the result of the second judgment operation is no, the electric damper is controlled to close after a third preset time, and waits until the door is opened, then the electric damper is controlled to open, and the first judgment operation is executed; if the result of the first judgment operation is no, the electric damper is controlled to close.

[0106] It should be noted that the specific implementation process of the first judgment operation and the second judgment operation is the same as that in the above embodiments, and will not be repeated here.

[0107] Preferably, the electric damper 14 is normally open, and is in the open state when the electric damper 14 is powered off; when the controller 15 controls the power supply terminal to supply power to the electric damper 14, the electric damper 14 is powered on and is in the closed state.

[0108] In a preferred embodiment, the display cabinet 10 further includes a door switch detection device, which is used to detect the operating status of the door 12; wherein, the operating status is open or closed;

[0109] The controller 15 is also used to perform the following steps: real-time acquisition of the operating status of the door body detected by the door switch detection device.

[0110] Preferably, see Figure 7 This is a schematic diagram of the structure of a display cabinet provided in the second embodiment of the present invention. The door opening and closing detection device includes a magnet 161 and a magnetic switch 162; the magnet 161 is disposed on the door body, and the magnetic switch 162 is disposed on the cabinet body 11, and when the door body 12 is closed, the installation positions of the magnet 161 and the magnetic switch 162 are adjacent.

[0111] When the magnetic switch is within the effective magnetic field of the magnet, the magnetic switch is in a closed state; when the magnetic switch is not within the effective magnetic field of the magnet, the magnetic switch is in an open state. Therefore, when the door 12 is opened, the magnet 161 installed on the door 12 moves away from the cabinet 11, and the distance between the magnetic switch 162 and the magnet 161 exceeds the effective magnetic field, so the magnetic switch 162 is in an open state; when the door 12 is closed, the magnet 161 installed on the door 12 moves closer to the cabinet 11, and the distance between the magnetic switch 162 and the magnet 161 is within the effective magnetic field, so the magnetic switch 162 is in a closed state.

[0112] Then, see Figure 8This is a flowchart illustrating the operation of the controller in the fifth implementation of this invention. The controller 15 performs the real-time acquisition of the door's operating status detected by the door switch detection device through the following steps:

[0113] The opening and closing state of the magnetic switch is detected; wherein the opening and closing state is either an open state or a closed state.

[0114] When the magnetic switch is in the closed state, the door is determined to be closed; when the magnetic switch is in the open state, the door is determined to be open.

[0115] The technical means of this invention are to detect the operating status of the door by setting up a magnetic switch and a magnet. The structure is simple and the detection results are effective and accurate.

[0116] See Figure 9 This is a flowchart illustrating a method for controlling an electric damper of a display cabinet according to a first embodiment of the present invention. The present invention provides a method for controlling an electric damper of a display cabinet. The display cabinet includes: a cabinet body, having a door and an exhaust vent; and an electric damper disposed in the exhaust direction of the exhaust vent.

[0117] The method for controlling the electric damper of the display case is specifically executed through steps S31 to S35:

[0118] S31. After the display cabinet is powered on, if the door is opened, the electric damper is controlled to open, and a first judgment operation is performed: to determine whether the door is closed within a first preset time after the door is opened.

[0119] S32. If the result of the first judgment operation is yes, execute the second judgment operation: determine whether the door is opened within a second preset time after the door is closed;

[0120] S33. If the result of the second judgment operation is yes, execute the first judgment operation;

[0121] S34. If the result of the second judgment operation is negative, then after a third preset time period, control the electric damper to close, wait until the door opens, control the electric damper to open, and execute the first judgment operation.

[0122] S35. If the result of the first judgment operation is negative, then control the electric damper to close.

[0123] This invention provides a method for controlling an electric damper of a display cabinet. By installing an electric damper on the exhaust vent of the display cabinet, after the display cabinet is powered on, if the door is open, the electric damper is controlled to open, and a first judgment operation is performed: determining whether the door has closed within a first preset time period after it has opened; if the result of the first judgment operation is yes, a second judgment operation is performed: determining whether the door has opened within a second preset time period after it has closed; if the result of the second judgment operation is yes, the first judgment operation is performed; if the result of the second judgment operation is no, the electric damper is controlled to close after a third preset time period, and the process waits until the door opens, then controls the electric damper to open, and performs the first judgment operation again; if the result of the first judgment operation is no, the electric damper is controlled to close. By employing the technical means of this invention, the opening and closing of the electric damper is controlled by real-time detection of the operating status of the display cabinet door, thereby achieving control over the opening and closing of the exhaust vent. This allows for the preparation of air pressure balance within the display cabinet before the door is opened, which not only quickly resolves the negative pressure problem inside the display cabinet but also prevents the exhaust vent from being open for extended periods, thus avoiding negative impacts on the display cabinet or the items inside, such as loss of cooling capacity, increased energy consumption, or deterioration of items due to prolonged contact with air.

[0124] For a preferred embodiment, see Figure 10 This is a flowchart illustrating a method for controlling an electric damper of a display cabinet according to a second embodiment of the present invention. After step S15, the method further includes:

[0125] Perform the third judgment operation: determine whether the door has closed within a fourth preset time period after the door has been opened; the fourth preset time period is longer than the first preset time period;

[0126] If the result of the third judgment operation is yes, then when the door is closed, control the electric damper to open and re-execute the second judgment operation;

[0127] If the result of the third judgment operation is negative, then a preset alarm message push operation is executed to remind the user to close the door.

[0128] After the preset alarm information push operation is executed to remind the user to close the door, wait until the door is closed, and after the door is closed, control the electric damper to open and re-execute the second judgment operation.

[0129] In a preferred embodiment, the method further includes:

[0130] After the display cabinet is powered on, if the door is closed, the electric damper will be controlled to close.

[0131] After the display cabinet is powered on, if the door is closed, the electric damper is controlled to close, and then the process waits until the door opens. After the door opens, the electric damper is controlled to open, and the first judgment operation is executed.

[0132] By employing the technical means of this invention, and through the judgment of overdue closing of the display cabinet door, the negative impact of prolonged opening of the display cabinet door on the display cabinet or the items inside, caused by prolonged contact between the internal and external environments, can be reduced. Furthermore, this solution controls the opening and closing of the electric damper according to the door's operating status, effectively solving the negative pressure problem inside the display cabinet and preventing the negative impact of prolonged opening of the exhaust vent on the display cabinet or the items inside, which would otherwise result in prolonged contact between the internal and external environments.

[0133] In a preferred embodiment, the display cabinet further includes a door switch detection device, which is used to detect the operating status of the door; wherein, the operating status is open or closed;

[0134] The method further includes:

[0135] The operating status of the door body detected by the door switch detection device is acquired in real time.

[0136] Preferably, the door switch detection device includes a magnet and a magnetic switch; the magnet is disposed on the door, and the magnetic switch is disposed on the cabinet, and when the door is closed, the magnet and the magnetic switch are installed adjacent to each other; when the magnetic switch is within the effective magnetic field of the magnet, the magnetic switch is in a closed state; when the magnetic switch is not within the effective magnetic field of the magnet, the magnetic switch is in an open state.

[0137] Therefore, the real-time acquisition of the operating status of the door detected by the door opening / closing detection device specifically includes:

[0138] The opening and closing state of the magnetic switch is detected; wherein the opening and closing state is either an open state or a closed state.

[0139] When the magnetic switch is in the closed state, the door is determined to be closed; when the magnetic switch is in the open state, the door is determined to be open.

[0140] The technical means of this invention are to detect the operating status of the door by setting up a magnetic switch and a magnet. The structure is simple and the detection results are effective and accurate.

[0141] It should be noted that the electric air door control method for a display cabinet provided in this embodiment of the invention has the same process steps as the controller of a display cabinet in the above embodiment. The working principle and beneficial effects of the two are one-to-one, so they will not be described again.

[0142] Those skilled in the art will understand that all or part of the processes in the above embodiments can be implemented by a computer program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. The storage medium can be a magnetic disk, optical disk, read-only memory (ROM), or random access memory (RAM), etc.

[0143] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A display cabinet, characterized in that, include: The cabinet has doors and ventilation holes; An electric damper is located in the exhaust direction of the exhaust port; Controller, used for: After the display case is powered on, if the door is opened, the electric damper is controlled to open, and a first judgment operation is performed: to determine whether the door is closed within a first preset time after the door is opened; If the result of the first judgment operation is yes, the second judgment operation is executed: determine whether the door is opened within a second preset time after the door is closed; If the result of the second judgment operation is yes, then execute the first judgment operation; If the result of the second judgment operation is negative, the electric damper will be closed after a third preset time, and the process will wait until the door is opened, then the electric damper will be opened and the first judgment operation will be executed. If the result of the first judgment operation is negative, then the electric damper is controlled to close, and a third judgment operation is performed: determining whether the door is closed within a fourth preset time period after the door is opened; the fourth preset time period is longer than the first preset time period. If the result of the third judgment operation is yes, then when the door is closed, control the electric damper to open and re-execute the second judgment operation; If the result of the third judgment operation is negative, then a preset alarm message push operation is executed to remind the user to close the door. After the preset alarm information push operation is executed to remind the user to close the door, wait until the door is closed, and after the door is closed, control the electric damper to open and re-execute the second judgment operation.

2. The display cabinet as described in claim 1, characterized in that, The controller is also used for: After the display cabinet is powered on, if the door is closed, the electric damper will be controlled to close. After the display cabinet is powered on, if the door is closed, the electric damper is controlled to close, and then the process waits until the door opens. After the door opens, the electric damper is controlled to open, and the first judgment operation is executed.

3. The display cabinet as described in claim 1, characterized in that, The display case also includes a door switch detection device, which is used to detect the operating status of the door; wherein, the operating status is open or closed; The controller is further used for: The operating status of the door body detected by the door switch detection device is acquired in real time.

4. The display cabinet as described in claim 3, characterized in that, The door switch detection device includes a magnet and a magnetic switch; the magnet is disposed on the door, and the magnetic switch is disposed on the cabinet, and when the door is closed, the magnet and the magnetic switch are installed adjacent to each other; when the magnetic switch is within the effective magnetic field of the magnet, the magnetic switch is in a closed state; when the magnetic switch is not within the effective magnetic field of the magnet, the magnetic switch is in an open state. Therefore, the real-time acquisition of the operating status of the door detected by the door opening / closing detection device specifically includes: The opening and closing state of the magnetic switch is detected; wherein the opening and closing state is either an open state or a closed state. When the magnetic switch is in the closed state, it is determined that the door is closed; When the magnetic switch is in the off state, it is determined that the door is open.

5. A method for controlling the electric damper of a display case, characterized in that, The display case includes: a cabinet body, with a door and an exhaust vent; and an electric damper located in the exhaust direction of the exhaust vent. The method includes: After the display case is powered on, if the door is opened, the electric damper is controlled to open, and a first judgment operation is performed: to determine whether the door is closed within a first preset time after the door is opened; If the result of the first judgment operation is yes, the second judgment operation is executed: determine whether the door is opened within a second preset time after the door is closed; If the result of the second judgment operation is yes, then execute the first judgment operation; If the result of the second judgment operation is negative, the electric damper will be closed after a third preset time, and the process will wait until the door is opened, then the electric damper will be opened and the first judgment operation will be executed. If the result of the first judgment operation is negative, then the electric damper is controlled to close, and a third judgment operation is performed: determining whether the door is closed within a fourth preset time period after the door is opened; the fourth preset time period is longer than the first preset time period. If the result of the third judgment operation is yes, then when the door is closed, control the electric damper to open and re-execute the second judgment operation; If the result of the third judgment operation is negative, then a preset alarm message push operation is executed to remind the user to close the door. After the preset alarm information push operation is executed to remind the user to close the door, wait until the door is closed, and after the door is closed, control the electric damper to open and re-execute the second judgment operation.

6. The electric damper control method for the display case as described in claim 5, characterized in that, The method further includes: After the display cabinet is powered on, if the door is closed, the electric damper will be controlled to close. After the display cabinet is powered on, if the door is closed, the electric damper is controlled to close, and then the process waits until the door opens. After the door opens, the electric damper is controlled to open, and the first judgment operation is executed.

7. The electric damper control method for the display case as described in claim 5, characterized in that, The display case also includes a door switch detection device, which is used to detect the operating status of the door; wherein, the operating status is open or closed; The method further includes: The operating status of the door body detected by the door switch detection device is acquired in real time.

8. The electric damper control method for the display case as described in claim 7, characterized in that, The door switch detection device includes a magnet and a magnetic switch; the magnet is disposed on the door, and the magnetic switch is disposed on the cabinet, and when the door is closed, the magnet and the magnetic switch are installed adjacent to each other; when the magnetic switch is within the effective magnetic field of the magnet, the magnetic switch is in a closed state; when the magnetic switch is not within the effective magnetic field of the magnet, the magnetic switch is in an open state. Therefore, the real-time acquisition of the operating status of the door detected by the door opening / closing detection device specifically includes: The opening and closing state of the magnetic switch is detected; wherein the opening and closing state is either an open state or a closed state. When the magnetic switch is in the closed state, it is determined that the door is closed; When the magnetic switch is in the off state, it is determined that the door is open.

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