Control device for door seal structure and door seal system

Abstract

The utility model provides a control device for a door seal structure and a door seal system. The control device comprises a controller, a first electromagnetic valve, a second electromagnetic valve, a vacuum generator, a vacuum filter, a nitrogen source and an air source, the controller is connected with the first electromagnetic valve, the second electromagnetic valve and the vacuum generator. The nitrogen source is used for being connected with a door seal strip of a door seal structure through the first electromagnetic valve. The air source is connected with the door sealing strip through the second electromagnetic valve, and the vacuum generator and the vacuum filter are sequentially arranged between the second electromagnetic valve and the door sealing strip. Vacuum negative pressure generated by the vacuum generator shrinks the door sealing strip, it is guaranteed that the whole structure of the door sealing strip is not in a gap, damage to the door sealing strip in the door opening and closing process is avoided, the sealing reliability of the door sealing strip is improved, due to vacuum air suction, the door sealing strip cannot be damaged, and the sealing reliability of the door sealing strip is further improved; and the safety is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of sterilization, in particular to a control device for a door sealing structure and a door sealing system. Background Art

[0002] Ethylene oxide sterilization equipment is a key equipment for manufacturers of disposable sterile medical devices. It has special requirements for installation, operation, and use management. Ethylene oxide is used as a sterilizer. Ethylene oxide is a broad-spectrum sterilizer that can kill various microorganisms at room temperature, including spores, Mycobacterium tuberculosis, bacteria, viruses, fungi, etc.

[0003] Sterilization cabinets use inflatable door seals to ensure a tight seal. Typically, inflatable door seals are vented naturally or through an electric vacuum pump. Natural venting utilizes the elasticity of the rubber to naturally vent air, preventing the seal from retracting into the door seal groove. The gap between the sterilizer door and the cabinet body is 10-15mm. Opening the door can easily rub the door seal or pull it out of the groove, causing a seal failure. If an electric vacuum pump is used, the rapid exhaust rate and excessive negative pressure within the door seal can easily cause the seal to deform and fall out of the groove.

[0004] The sterilization process uses ethylene oxide, a flammable and explosive gas that poses a risk of cancer to humans when inhaled. A damaged door seal can cause a sterilization cycle failure and ethylene oxide leakage, potentially harming operators.

[0005] It should be noted that the information disclosed in the background technology section of the invention is only intended to deepen the understanding of the general background technology of the utility model, and should not be regarded as an admission or in any form of implication that the information constitutes prior art already known to those skilled in the art. Utility Model Content

[0006] The purpose of the utility model is to provide a control device for a door sealing structure and a door sealing system which can prevent damage to the door sealing structure and avoid leakage of ethylene oxide.

[0007] To achieve the above-mentioned objectives, the present invention provides a control device for a door sealing structure, the control device comprising a controller, a first solenoid valve, a second solenoid valve, a vacuum generator, a vacuum filter, a nitrogen source and an air source; the controller is connected to the first solenoid valve, the second solenoid valve and the vacuum generator respectively; the nitrogen source is used to be connected to the door seal of the door sealing structure via the first solenoid valve; the air source is connected to the door seal via the second solenoid valve, and the vacuum generator and the vacuum filter are sequentially arranged between the second solenoid valve and the door seal.

[0008] Optionally, a check valve is further included, which is arranged between the first electromagnetic valve and the door seal.

[0009] Optionally, a muffler is further included, which is connected with the vacuum generator, and the vacuum generator is located between the muffler and the vacuum filter.

[0010] Optionally, the number of the first electromagnetic valves is plural, the first electromagnetic valves are respectively connected with the controller, and the first electromagnetic valves are respectively connected with the door seals.

[0011] Optionally, the number of the second electromagnetic valves is plural, the second electromagnetic valves are respectively connected with the controller, and the second electromagnetic valves are respectively connected with the vacuum generator and the air source.

[0012] To achieve the above object, the utility model further provides a door seal system, including door seal structure and above-mentioned control device, the door seal structure includes door seal, the control device is used for controlling the aeration and the deflation of door seal.

[0013] Optionally, the door seal structure further includes a body, the body is provided with a groove, the door seal is arranged in the groove, and the opening of the groove faces the door.

[0014] Optionally, the number of the grooves is plural, the grooves are arranged at intervals, and the grooves correspond to the door seals one by one.

[0015] Optionally, the door seal includes an abutting portion, a connecting portion and an inflation portion, the abutting portion abuts against the bottom of the groove, the connecting portion connects the abutting portion and the inflation portion, and the inflation portion abuts against the door in the inflation state.

[0016] Optionally, the maximum width of the connecting portion is less than the width of the abutting portion, and the width of the abutting portion is the same as the width of the groove.

[0017] The control device for the door seal structure and the door seal system, the control device comprises a controller, a first electromagnetic valve, a second electromagnetic valve, a vacuum generator, a vacuum filter, a nitrogen source and an air source. The controller is connected with the first electromagnetic valve, the second electromagnetic valve and the vacuum generator respectively, the nitrogen source is connected with the door seal strip of the door seal structure through the first electromagnetic valve, the air source is connected with the door seal strip through the second electromagnetic valve, and the vacuum generator and the vacuum filter are arranged between the second electromagnetic valve and the door seal strip in sequence. Therefore, when the door of the sterilization cabinet is closed, the controller controls the first electromagnetic valve to open, the second electromagnetic valve and the vacuum generator to close, and the nitrogen in the nitrogen source to fill the door seal strip through the first electromagnetic valve, so that the door seal strip is inflated and abuts against the door, so that the gap between the door and the cabinet body of the sterilization cabinet is filled, the sealing is realized, and the leakage of ethylene oxide is avoided. When the door of the sterilization cabinet is opened, the controller controls the first electromagnetic valve to close, the second electromagnetic valve and the vacuum generator to open, and the compressed air in the air source to flow through the vacuum generator to generate vacuum suction through the second electromagnetic valve, so that the nitrogen in the door seal strip is discharged through the vacuum filter and the vacuum generator, so that the door seal strip is contracted, the whole structure of the door seal strip is ensured not to be in the gap, the damage to the door seal strip in the process of opening and closing the door is avoided, the reliability of the door seal strip is improved, and the safety is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The overall structure schematic diagram of the control device provided for an embodiment of the utility model is provided.

[0019] Figure 2 The structure schematic diagram of the door seal strip when being inflated provided for an embodiment of the utility model is provided.

[0020] Figure 3 The structure schematic diagram of the door seal strip after being exhausted provided for an embodiment of the utility model is provided. DETAILED DESCRIPTION

[0021] The control device for the door seal structure and the door seal system according to the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. The advantages and features of the present application will be more apparent according to the following description. It should be noted that the accompanying drawings are greatly simplified and all use non-precise proportions, only for the purpose of facilitating and clarifying the purpose of assisting in the description of the embodiments of the present application. In order to make the purpose, features and advantages of the present application more apparent and easy to understand, please refer to the accompanying drawings. It is known that the structure, proportion, size and the like shown in the drawings of the present application are only used to cooperate with the content disclosed in the specification, so that those skilled in the art can understand and read, and are not used to limit the conditions of the implementation of the present application. Any modification of structure, change of proportion relationship or adjustment of size, as long as the same or similar to the effect and purpose that can be achieved by the present application, should still fall within the scope of the technical content disclosed by the present application. The specific design features of the present application disclosed in this paper include, for example, specific dimensions, directions, positions and shapes, which will be determined partly by the specific application and use environment. In addition, in the following description of the embodiments, sometimes the same reference signs are used between different drawings to represent the same parts or parts with the same function, and the repeated description is omitted. In this specification, similar signs and letters are used to represent similar items, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings. In addition, if the method described herein includes a series of steps, and the order of the steps presented herein is not necessarily the only order in which these steps can be performed, and some of the described steps can be omitted and / or some other steps not described herein can be added to the method.

[0022] It should be noted that, in this document, relational terms such as first and second, etc., are merely used to distinguish one entity or operation from another, and do not necessarily require or imply any actual relationship or order between these entities or operations, nor should they be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Moreover, the terms "comprises," "includes," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprises a..." does not exclude the presence of other identical elements in the process, method, article, or device that includes the element. The singular forms "a", "an" and "the" include plural referents, the term "or" is generally used in a sense including "and / or", the term "several" is generally used in a sense including "at least one", the term "at least two" is generally used in a sense including "two or more", and the term "multiple" is generally used in a sense including "at least two".

[0023] In the description of the utility model, need understanding is, the term "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" the orientation or positional relationship indicated in the drawing is based on the orientation or positional relationship shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and not indicating or implying that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the utility model. In the description of the utility model, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication between two elements or the interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances. In addition, in the utility model, unless otherwise explicitly specified and limited, the first feature is "on" or "below" the second feature, which can include the direct contact between the first and second features, or it can include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "above", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0024] The core idea of the utility model lies in providing a control device 100, which is used for door seal structure 200, controls the inflation and exhaust of door seal strip 210 in door seal structure 200. Wherein, in the embodiment, the door seal structure 200 is used in the sterilization cabinet, the sterilization cabinet is used for ethylene oxide sterilization, and the sealing property of the sterilization cabinet needs to be ensured.

[0025] Please refer to Figures 1-3The control device 100 comprises a controller 110, a first electromagnetic valve 120, a second electromagnetic valve 130, a vacuum generator 140, a vacuum filter 150, a nitrogen source 160 and an air source 170. The controller 110 is electrically connected with the first electromagnetic valve 120, the second electromagnetic valve 130 and the vacuum generator 140 respectively, wherein the controller 110 can be a PLC. The nitrogen source 160 is connected with the door seal strip 210 of the door seal structure 200 through the first electromagnetic valve 120, and the nitrogen source 160 and the first electromagnetic valve 120 and the first electromagnetic valve 120 and the door seal strip 210 are connected through air pipes. Thus, when the door 300 of the sterilization cabinet is closed in place, the controller 110 receives a closing signal, and the controller 110 sends a door seal strip inflation signal to the first electromagnetic valve 120, and the first electromagnetic valve 120 is turned on to open. At this time, the nitrogen in the nitrogen source 160 passes through the air pipe to the first electromagnetic valve 120, and then flows into the door seal strip 210 through the air pipe, and the door seal strip 210 is inflated to fill the gap (10-15 mm) between the cabinet body and the door 300 of the sterilization cabinet, achieving the purpose of sealing. The first electromagnetic valve 120 can be a two-position two-way valve, and the mass of the nitrogen in the nitrogen source 160 can be 4-4.5 kg. In one embodiment, the control device 100 further comprises a check valve 180, which is arranged between the first electromagnetic valve 120 and the door seal strip 210. When the door seal strip 210 is inflated, the check valve 180 is also in an open state. Through the arrangement of the check valve 180, when the external nitrogen pressure is lost, the nitrogen in the door seal strip 210 is prevented from leaking to cause sealing failure. In addition, a sensor can be arranged on the door 300, and when the door 300 is closed, the sensor sends a closing signal to the controller 110.

[0026] The air source 170 is connected to the door seal 210 via the second solenoid valve 130. The vacuum generator 140 and vacuum filter 150 are sequentially positioned between the second solenoid valve 130 and the door seal 210. Therefore, when the sterilizer door 300 is opened, the controller 110 receives a door-opening signal and controls the first solenoid valve 120 to close, the second solenoid valve 130 to open, and the vacuum generator 140 and vacuum filter 150 to open. At this point, compressed air from the air source 170 flows through the vacuum generator 140, generating vacuum suction, or negative pressure. Nitrogen in the door seal 210 is discharged from the vacuum generator 140 through the air pipes between the door seal 210 and the vacuum filter 150, and between the vacuum filter 150 and the vacuum generator 140. After a predetermined period of time, the controller 110 controls the second solenoid valve 130 and vacuum generator 140 to close, stopping exhaust. At this point, the door seal 210 is fully retracted into the groove 221. It should be noted that in one embodiment, the predetermined time can be 80 seconds. Testing has shown that the air in the door seal can be completely exhausted within 50 seconds, ensuring that the door seal 210 is fully retracted into the groove 221. Taking into account factors such as the unstable compressed air pressure in the vacuum generator power source and the delay in the solenoid valve opening and closing, the 80-second vacuum exhaust time in the door seal 210 ensures that the door seal 210 is completely retracted into the groove 221 after exhaust. This prevents damage to the door seal 210 during door opening and closing, improving the sealing reliability of the door seal 210. The second solenoid valve 130 can be a two-position, two-way valve, and the mass of the compressed air in the air source 170 can be 6-8 kg. Furthermore, the vacuum generator 140 generates a high-speed jet that draws air from the negative pressure chamber, creating negative pressure suction, completely expelling nitrogen from the door seal cavity. After exhaust, the door seal retracts into the groove. The vacuum generator 140 only generates a maximum negative pressure of 20 kPa, which does not damage the door seal. The function of the vacuum filter 150 is to prevent foreign matter from being sucked into the pipe of the vacuum generator when the door seal is damaged.

[0027] The control device 100 comprises a controller 110, a first electromagnetic valve 120, a second electromagnetic valve 130, a vacuum generator 140, a vacuum filter 150, a nitrogen source 160 and an air source 170. The controller 110 is connected with the first electromagnetic valve 120, the second electromagnetic valve 130 and the vacuum generator 140 respectively. The nitrogen source 160 is connected with the door seal strip 210 of the door seal structure through the first electromagnetic valve 120. The air source is connected with the door seal strip 210 through the second electromagnetic valve 130. The vacuum generator 140 and the vacuum filter 150 are arranged in sequence between the second electromagnetic valve 130 and the door seal strip 210. When the door of the sterilization cabinet is closed, the controller 110 controls the first electromagnetic valve 210 to open, the second electromagnetic valve 130 and the vacuum generator 140 to close, and the nitrogen in the nitrogen source 160 to flow through the first electromagnetic valve 120 to inflate the door seal strip 210. After the door seal strip 210 is inflated, it is inflated and abuts against the door, so that the gap between the door and the cabinet body of the sterilization cabinet is filled, sealing is realized, and leakage of ethylene oxide is avoided. When the door of the sterilization cabinet is opened, the controller 110 controls the first electromagnetic valve 120 to close, the second electromagnetic valve 130 and the vacuum generator 140 to open, and the compressed air in the air source to flow through the second electromagnetic valve to generate vacuum suction through the vacuum generator. The nitrogen in the door seal strip is discharged through the vacuum filter 150 and the vacuum generator 140, so that the door seal strip is contracted, the entire structure of the door seal strip is ensured not to be in the gap, damage to the door seal strip during opening and closing of the door is avoided, the reliability of the door seal strip is improved, and the safety is further improved.

[0028] In one embodiment, the control device 100 further comprises a silencer 190, the silencer 190 is connected with the vacuum generator 140, and the vacuum generator 140 is located between the silencer 190 and the vacuum filter 140. At this time, the nitrogen is discharged from the silencer 190. Through the arrangement of the silencer 190, the sound generated by the vacuum generator 140 can be avoided to be too high, and the noise can be reduced.

[0029] Further, the number of the first electromagnetic valves 120 can be multiple. This is because when the number of the door seal strips 210 is multiple, each door seal strip 210 needs to be controlled respectively. When the number of the first electromagnetic valves 120 is multiple, each first electromagnetic valve 120 is connected with the controller 110 respectively, and the first electromagnetic valves 120 are connected with the door seal strips respectively. The first electromagnetic valves 120 correspond to the door seal strips 210 one by one. When the door seal strips 210 need to be inflated, the controller 110 controls the first electromagnetic valves 120 to open respectively. Figure 2 As shown in the embodiment, the number of the door seal strips 210 is two. The first electromagnetic valves 120 correspond to the door seal strips 210 one by one, so that the door seal strips 210 can be avoided to be out of control at the same time.

[0030] Furthermore, there may be multiple second solenoid valves 130, each of which is connected to the controller 110 and to the vacuum generator 140 and the air source 170. This means that each second solenoid valve 130 corresponds to each door seal 210. This allows for separate exhaust control of the door seal 210, further improving the reliability of the entire device.

[0031] The present application also provides a door sealing system, which includes a door sealing structure 200 and the above-mentioned control device 100. The door sealing structure 200 includes a door sealing strip 210. The control device 100 is used to control the inflation and deflation (ie, exhaust) of the door sealing strip 210. Figure 2 and Figure 3 The door seal structure 200 includes a body 220 having a groove 221 formed therein. The door seal 210 is positioned within the groove 221, with the opening of the groove 221 facing the sterilizer door 300. When the door seal 210 is deflated, it contracts into the groove 221. When the door seal 210 is inflated, it is inflated until it abuts the door 300, achieving a seal. Furthermore, there are multiple grooves 221, which are spaced apart and correspond one to one with the door seals 210.

[0032] Furthermore, the door seal 210 includes an abutting portion 211, a connecting portion 212, and an inflatable portion 213. The abutting portion 211 abuts against the bottom of the groove 221, and the connecting portion 212 connects the abutting portion 211 and the inflatable portion 213. The inflatable portion 213 abuts against the door when inflated. At this time, the inflatable portion 213 is connected to the vacuum generator 140 and to the first solenoid valve 120. It should be noted that the abutting portion 211, the connecting portion 212, and the inflatable portion 213 can be integrally formed. In addition, the material used for the door seal can be an elastic material, such as rubber.

[0033] Furthermore, the maximum width of the connecting portion 212 is smaller than the width of the abutting portion 211, and the width of the abutting portion 211 is the same as the width of the groove, so that the abutting portion 211 is tightly abutted against the bottom of the groove, while the width of the connecting portion 212 is smaller, which facilitates the placement of the door seal in the groove.

[0034] It should be noted that in the description of the specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the utility model. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in any one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples without contradiction.

[0035] It should also be noted that the above description is only a description of the preferred embodiments of the utility model, and not any limitation on the scope of the utility model, any modification of the above disclosure by the person skilled in the art belongs to the protection scope of the utility model. Obviously, those skilled in the art can make various modifications and changes to the application without departing from the spirit and scope of the utility model. Thus, if these modifications and changes belong to the scope of the utility model and its equivalent technology, the utility model also intends to include these modifications and changes.

Claims

1. A control device for a door sealing structure, characterized in that: It includes a controller, a first solenoid valve, a second solenoid valve, a vacuum generator, a vacuum filter, a nitrogen source and an air source; the controller is connected to the first solenoid valve, the second solenoid valve and the vacuum generator respectively; the nitrogen source is used to connect to the door seal of the door sealing structure through the first solenoid valve; the air source is connected to the door seal through the second solenoid valve, and the vacuum generator and the vacuum filter are arranged in sequence between the second solenoid valve and the door seal.

2. The control device for a door sealing structure according to claim 1, characterized in that: A check valve is also included, and the check valve is arranged between the first solenoid valve and the door seal.

3. The control device for a door sealing structure according to claim 1, characterized in that: The invention further comprises a muffler connected to the vacuum generator, and the vacuum generator is located between the muffler and the vacuum filter.

4. The control device for a door sealing structure according to claim 1, characterized in that: There are multiple first solenoid valves, each of which is connected to the controller. Each of the first solenoid valves is connected to the door seals. The first solenoid valves correspond to the door seals in a one-to-one manner.

5. The control device for a door sealing structure according to claim 4, characterized in that: There are multiple second solenoid valves, each of which is connected to the controller, and each of which is connected to the vacuum generator and the air source.

6. A door sealing system, characterized in that: It comprises a door sealing structure and a control device as described in any one of claims 1 to 5, wherein the door sealing structure comprises a door sealing strip, and the control device is used to control the inflation and deflation of the door sealing strip.

7. The door sealing system according to claim 6, characterized in that: The door sealing structure further includes a body, the body is provided with a groove, the door sealing strip is arranged in the groove, and the opening of the groove faces the door.

8. The door sealing system according to claim 7, characterized in that: There are multiple grooves, which are arranged at intervals, and the grooves correspond to the door seals one by one.

9. The door sealing system according to claim 7, characterized in that: The door seal includes an abutting portion, a connecting portion, and an inflating portion. The abutting portion abuts against the bottom of the groove. The connecting portion connects the abutting portion and the inflating portion. The inflating portion abuts against the door in an inflated state.

10. The door sealing system according to claim 9, characterized in that: The maximum width of the connecting portion is smaller than the width of the abutting portion, and the width of the abutting portion is the same as the width of the groove.

Images