CN1990049B - Disinfection cabinet and other home appliance devices using heat-driven snap-on - Google Patents

Abstract

A disinfection cabinet and other home appliance devices that adopt heat-driven snap-on. The heat-driven snap-on device utilizes the principle of thermal deformation of a bimetallic sheet to control the switch of the door body through a simple mechanical transmission device. When the bimetallic sheet When the temperature reaches a certain level, the bimetal sheet deforms to activate the hook device to lock the door body. When the temperature drops to a certain level, the door body is unlocked. The device of the present invention has a simple structure and is easy to install; the power consumption is small and the power is low; It is safe and reliable to use during the working period; the present invention does not need to manually unlock and close the lock, and the switch of the snap-on is controlled by the signal of the computer control board and the surrounding temperature of the bimetal sheet to control heat.

Description

Disinfection cabinet and other home appliance devices using heat-driven snap-on

technical field

The invention relates to a disinfection cabinet and other household electrical appliances adopting heat-driven snap-on.

Background technique

The national standard GB17988-2004 of the People's Republic of China stipulates in 6.1.22.101 "Safety and Sanitation Requirements for Tableware Disinfection Cabinets" that "ozone disinfection cabinet (room) and ultraviolet disinfection cabinet (room) should be equipped with door switches. When the disinfection cabinet (room) door When the maximum gap opened is greater than 2cm, the ozone generator and ultraviolet lamp stop working immediately, and the ozone generator and ultraviolet lamp can be restarted when the door is closed again. Ozone disinfection cabinets with ozone concentration ≥ 40mg/ ^m3 (room ), the door of the ultraviolet disinfection cabinet (room) should be equipped with a brake lock switch, so that the door of the disinfection cabinet (room) can only be opened after the disinfection cycle of the disinfection cabinet (room) is completed".

The two states given by this standard may cause harm to the human body if the locks of the prior art are used in specific implementation:

The first is to open the door and cut off the power so that the ozone generator and the ultraviolet lamp stop working. However, if the ozone concentration in the ozone disinfection cabinet (room) and ultraviolet disinfection cabinet (room) is still above the dangerous concentration when the door is opened, it will Injury to the human body occurs;

The second is to refuse to open the door without completing the work cycle, which actually specifies that only electronic locks can be used, because only electronic locks can communicate with the control devices of the ozone disinfection cabinet (room) and ultraviolet disinfection cabinet (room) linkage.

As a disinfection cupboard, the most commonly used one is actually not listed in this standard, the steam disinfection cabinet. When the steam in the steam disinfection cabinet is still at high temperature, the user may be injured if the door is accidentally opened.

How to design a kind of disinfection cupboard or similar household appliances equipped with a lock with simple structure is the problem to be solved by the present invention.

Most of the existing disinfection cabinet (or similar electrical appliances) door switches are contact power-off type. The contact power-off type can be easily opened during high-temperature disinfection or ozone disinfection. Although the disinfection cabinet and other household appliances The electrical components will stop working, but the high temperature and (or) a large amount of ozone generated during the period will not decrease and (or) disappear instantly. At this time, it is very easy to cause high temperature burns to the human body and (or) high concentration ozone leakage to the human body. . For this reason, those skilled in the art have carried out a series of improvements on the door body and snap-on structure of disinfection cabinets and other household appliances, specifically as the following reference documents:

CN97209043.6 discloses an anti-scalding safety lock, which is used as a snap lock for high-temperature disinfection cabinets and other household appliances. The shape memory alloy spring is used as the push lock spring, which has strong elasticity at high temperature, and pushes the lock bar to the lock buckle, so that the cabinet door cannot be opened. At room temperature, the elasticity of the spring weakens, and the lock bar is pushed back by the return action of the spring, and the cabinet door can be opened.

CN200420093376 discloses an electronically controlled delay latch safety device for a washing machine. Including: base, tongue-shaped reed with one end fixed on the bottom of the base, U-shaped reed in the middle of the tongue-shaped reed, latch at the movable end of the tongue-shaped reed, PTC ceramic heating element, bimetal, slide plate, return spring , contacts, etc. When the washing machine is powered on, the bimetal is heated and deformed by the ceramic heating element, and the movable end of the tongue-shaped reed is pushed to drive the latch down into the square hole of the slide plate to lock the slide plate, thereby ensuring that the door will not be opened during the washing machine’s working process. When the laundry is finished, the switch is powered off, and the bimetal strip cools down, so that the spring leaf and the slide plate are reset, and the door can be opened at this moment.

Contents of the invention

The main purpose of the present invention is to provide a disinfection cupboard and other similar household appliances using active and/or passive heat-driven snaps.

The semi-locked heat-driven snap-on structure of the present invention is used for disinfection cabinets or similar household appliances. When the door is accidentally opened during work, the heat-driven snap-on at this time controls the door from being opened, thereby avoiding high temperature and (or) the harm caused by ozone leakage to the human body.

According to experience and specific products in the prior art, the lock generally only has two actions, closing or opening, and often has a complex structure. The present invention further proposes a semi-locking thermal lock.

For realizing above-mentioned purpose of the invention, the technical scheme that the present invention adopts is as follows:

A thermally driven snap-on structure for disinfection cabinets and other household appliances, the thermally driven snap-on device used to control disinfection cabinets and other household appliances from being opened during disinfection is arranged on the disinfection cabinet and other household appliances Between the fixed liner and the disinfection cabinet and other household appliance doors, one end of the electric heater of the heat-driven snap-on device is connected to the computer control board (active heat-driven snap-in) through wires, when the computer control board When a signal for heating and disinfection is issued or the temperature in the cabinet rises above the warning temperature, the thermally driven snap-on device starts to work and fastens the door so that the door cannot be opened; when the computer control board sends a heating and disinfection When the stop signal is issued or the temperature in the cabinet drops below the warning temperature, the thermally driven snap-on device stops working and the door body is released so that the door body can be pulled out easily.

In the heat-driven snap-on structure for disinfection cabinets and other household appliances, the heat-driven snap-in device includes an electric heater assembly, and a bottom of the electric heater assembly for fixing the electric heater. The base plate of the assembly, on the bottom of the base plate, is provided with an elastic bimetal that deforms elastically when heated, and a mechanical interlock hook device overlapping with one end of the bimetal, the mechanical interlock hook The other end of the hook device overlaps with the hook connector arranged on the door body.

In the present invention, an active or passive heat-driven snap-on structure can be used. The active heat-driven snap-on structure in the present invention means that the lock has its own electric heater assembly, and the electric heater The opening and closing are connected with the control of the home appliance, and the working state is adjusted according to the needs; while the passive heat-driven snap-on structure means that there is no electric heater on the lock, and the working state of the lock changes with the internal temperature of the home appliance.

In the thermally driven snap-on structure for disinfection cabinets and other household appliances, the bottom of the substrate is provided with a fixed point for fixing the bimetal and a fixing device for fixing the mechanical interlocking hook device. One end of the bimetallic sheet is fixed on a fixed point, and the other end of the mechanical interlocking hook device is clamped and fixed in the fixing device so as to be movable up and down.

In the thermally driven snap-on structure for disinfection cabinets and other household appliances, the fixing point and fixing device are integrated with the base plate, or the fixing point and fixing device are screwed or welded to the bottom of the base plate.

In the heat-driven snap-on structure for disinfection cabinets and other household appliances, the heat-driven snap-in device further includes a cover plate and a shield, and the cover plate is fixedly arranged on the electric heater assembly. Periphery, the shield is fixedly arranged on the bottom of the base plate, one end of which contains the bimetal sheet as a whole, and the other end is provided with a shield slot for the convenience of the mechanical linkage hook device passing through the shield .

In the thermally driven snap-on structure for disinfection cabinets and other household appliances, the other end of the shield is the end close to the door body, part of the mechanical interlocking hook device is contained in the shield, and the other part Go through the slot of the shield and overlap with the hook connecting piece arranged on the door body.

In the thermally driven snap-on structure for disinfection cabinets and other household appliances, the cover plate is socketed or clipped and fixed on the upper periphery of the electric heater assembly; the shield is socketed or plugged and fixed set on the bottom of the substrate.

In the thermally driven snap structure used for disinfection cabinets and other household appliances, the bimetallic sheet adopts a bimetallic sheet structure, and the mechanical interlocking hook device adopts a hook structure.

In the thermally driven snap-on structure for disinfection cabinets and other household appliances, a terminal post is further provided on the electric heater assembly to facilitate connection with signal lines.

An active thermally driven snap lock, comprising a base plate, an electric heater assembly is arranged on the base plate, a fixed point for fixing one end of a bimetal strip is arranged on the base plate, and a snap hook is used for pivotally fixing The fixing device of the device, the hook device can move around the pivot on the fixing device, the end of the forearm of the hook device is provided with a hook, the end of the rear arm of the hook device is provided with an opening, the bimetal Insert the other end into the opening.

Preferably, the present invention sets the opening as a "<"-shaped fork.

In order to make full use of the gravity of the hook device to complete the closing action, the length of the rear arm of the hook device is less than the length of the forearm of the hook device. 40%, more preferably, the length of the rear arm of the hook device is 15-25% of the length of the forearm of the hook device. In other words, in order to utilize the gravity of the hook device to complete the closing action, the present invention sets the center of gravity between the pivot on the fixing device and the end hook.

It is characterized in that the bimetallic sheet is disc-shaped.

The fixing point and the fixing device are integrally arranged with the base plate, or the fixing point and the fixing device are screwed or welded and fixed on the bottom of the base plate.

The thermally driven snap-on device of the present invention also includes a shield, the shield is fixed on the base plate, and one end of the shield is provided with a slot to facilitate the movement of the forearm stretched out by the hook device.

Correspondingly, if the snap lock described in the present invention is applied to a specific product, it is necessary to provide a matching snap connector on the door body.

Furthermore, when the lock of the present invention is in the closed state, the length of the forearm or the installation position of the hook device can make the door body open to a maximum of 2 cm.

In specific use, when the appliance is in the state of cooking or sterilizing, the electric heater assembly is activated and generates heat. As the temperature increases, the unfixed end of the bimetal goes upward (according to the direction shown in the figure, if the lock When the direction of opening and closing changes, the action of the bimetal sheet can be deduced) to move, and the crotch 3221 of the snap-on device 3 falls under the action of gravity, and is hooked on the hook connector 51 of the door body 5, and the door body In the closed state, when the temperature inside the home appliance device drops to a certain level, the bimetal strip moves down, pushing the hook 3221 to move up, and finally disengages from the hook connector 51, and the door can be opened.

The active thermally driven snap-on lock of the present invention also includes a cover plate 33 and a shield 34, the cover plate 33 is fixedly arranged on the upper periphery, and the shield 34 is fixedly arranged on the bottom of the base plate 32, One end of the bimetal sheet 321 is contained in it as a whole, and the other end is provided with a shield slot 341 for facilitating the mechanical interlock hook device 322 to pass through the shield 34 .

In the heat-driven snap-on structure used for disinfection cabinets and other household appliances, the other end of the shield 34 is the end close to the door body 5, and a part of the mechanical interlock hook device 322 is contained in the shield 34 Among them, the other part passes through the shield slot 341 and overlaps with the hook connector 51 provided on the door body 5 .

The beneficial effects of using the present invention are: firstly, the thermally driven snap-on device of the present invention is simple in structure, in fact, it mainly relies on four parts, namely, base plate 32, electric heater assembly, bimetal 321, hook device 322 can complete the opening and closing action.

Secondly, during the working period, the use of the heat-driven snap-on lock is safe and reliable; in addition, the heat-driven snap-on device of the present invention does not need manual unlocking and closing.

The beneficial effects of using the present invention are: firstly, the heat-driven snap-in device of the present invention has a simple structure and is easy to install; secondly, the heat-driven snap-in device of the present invention consumes little power and has low power; by converting thermal energy (electrical energy) into Mechanical energy controls the switch of the door body, so during the working period, the thermally driven snap-on lock is safe and reliable to use; in addition, the thermally-driven snap-on device of the present invention does not need to be manually unlocked and closed, and the thermally driven latch is controlled by the signal of the computer control board or the temperature in the cabinet. Snap on switch.

Description of drawings

Fig. 1 is one of the exploded views of the thermal lock of the present invention;

Fig. 2 is the second exploded view of the thermal lock of the present invention;

Fig. 3 is an exploded schematic view of the thermally driven snap-on device of the present invention;

Fig. 4 is a structural schematic diagram of a heat-driven snap-on device of the present invention installed on a disinfection cabinet and other household appliances;

Fig. 5 is a schematic diagram of the mechanism of the non-working state of the thermally driven snap-on device of the present invention;

Fig. 6 is a schematic diagram of the working state of the thermally driven snap-on device of the present invention.

In the present invention, the labeling of each figure number and the name of the parts correspond as follows: computer control board 1, signal line 2, snap-on device 3, electric heater assembly 31, terminal post 311, high temperature resistant connection wire 312, substrate 32, Bimetal 321, hook device 322, hook 3221, "<"-shaped fork 3222, "<"-shaped tail lower edge 3223, "<"-shaped tail upper edge 3224, fixed point 323, fixing device 324, cover plate 33 , Shield 34, shield slot 341, fixed liner 4, door body 5, hook connector 51. In the accompanying drawings 4 and 5 of the present invention, there are two bimetallic strips described, this is to describe the two positions of the bimetallic strip at normal temperature and high temperature, rather than setting two bimetallic strips at the position in the figure .

Detailed ways

The present invention will be described in detail below through specific embodiments and accompanying drawings.

As shown in Figure 3, it is an exploded schematic view of the thermally driven snap-in device of the present invention, the thermally driven snap-in structure used for disinfection cabinets and other household appliances, and the thermally driven snap-in device 3 includes an electric heater assembly 31, a substrate 32 arranged at the bottom of the electric heater assembly 31 for fixing the electric heater assembly, and an elastic bimetal 321 that deforms elastically when heated is arranged at the bottom of the substrate 32 , and a mechanical interlock hook device 322 overlapping with one end of the bimetallic sheet 321, the other end of the mechanical interlock hook device 322 is overlapped with the hook connector 51 provided on the door body 5, as explained here Yes, a terminal post 311 is provided on the electric heater assembly 31 to facilitate connection with the signal line 2. Of course, other wiring devices can also be used, not limited to the wiring provided in the present invention and the accompanying drawings. Column form, such as the use of junction slots, connecting lines, etc.

If a passive snap lock is used, there is no electric heater on the lock.

Further, a fixed point 323 for fixing the bimetal 321 and a fixing device 324 for fixing the mechanical interlock hook device 322 are provided at the bottom of the base plate 32, and one end of the bimetal 321 is fixed on a fixed At point 323 , the other end of the mechanical interlock hook device 322 is clamped and fixed in the fixing device 324 so as to be movable up and down.

The fixed point 323 and the fixing device 324 are integrated with the substrate 32, or the fixed point 323 and the fixing device 324 are screwed or welded to the bottom of the substrate 32, as shown in Figure 3, in the implementation of the present invention In the example, the fixing point and the fixing device are fixed on the bottom of the base plate 32 in an integral manner.

As shown in Figure 3, the thermally driven snap-on device 3 further includes a cover plate 33 and a shield 34, the cover plate 33 is fixedly arranged on the upper periphery of the electric heater assembly 31, and the shield The cover 34 is fixedly arranged on the bottom of the base plate 32, one end of which contains the bimetallic sheet 321 as a whole, and the other end opens a shield slot 341 in order to facilitate the passage of the mechanical interlock hook device 322 in the shield 34 . As shown in Figure 4, the other end of the shield 34 is the end close to the door body 5, a part of the mechanical linkage hook device 322 is contained in the shield 34, and the other part passes through the groove 341 of the shield It overlaps with the hook connector 51 provided on the door body 5 . It is supplemented here that the cover plate 33 is socketed or clamped and fixed on the upper periphery of the electric heater assembly 31 ; the shield 34 is socketed or inserted and fixed on the bottom of the base plate 32 .

In addition, the bimetallic sheet 321 described in the present invention adopts a bimetallic sheet structure, and the described mechanical interlocking hook device 322 adopts a hook structure, as shown in Figure 3 , the hook structure is connected to the card connector of the door body. The overlapping end 3221 is a hook, and the inward curvature of the hook at least contains 1/2 of the surface area of the door body card connector 51; "<" shape, wherein one end of the bimetal 321 is just placed in the "<"-shaped fork 3222, and at normal temperature, the bimetal 321 is slightly bent downward against the lower edge 3223 of the "<"-shaped fork , the mechanical interlock hook device 322 of the hook structure is in a natural horizontal state; under the condition of being heated, the bimetal 321 is elastically deformed when heated, and one end of the bimetal 321 is fixed on the fixed point 323, through heat conduction, radiation , the slightly downwardly bent end bounces upwards. At this time, the mechanical interlocking hook device 322 of the hook structure presses down centered on the fixed point of the fixing device 324, and is just clamped on the hook connector. At this time, The door is locked. The above is the description of the action relationship of the core components in the thermal protection snap-on device of the present invention.

Let's briefly explain the use of the thermally driven snap-on device of the present invention in disinfection cabinets and other household appliances. The fixed liner 4 in the body shell and the computer control board 1 arranged in the box body, between the fixed liner 4 of the disinfection cabinet and other household appliances and the door body 5 of the disinfection cabinet and other household appliances, a set for controlling disinfection is arranged. The thermally driven snap-on device 3 that is not opened during the disinfection process of the cabinet. One end of the thermally driven snap-in device 3 receives the signal from the computer control board through the signal line 2. When the computer control board sends out heating and disinfection When the signal or the temperature inside the cabinet is higher than the warning temperature, the thermally driven snap-on device starts to work, and the door cannot be pulled out tightly; when the computer control board sends a signal to stop heating and disinfection or the temperature in the cabinet is lower than When the temperature is alerted, the thermally driven snap-on device stops working, the door body is released, and the door body can be pulled out easily.

It can be seen from the above brief description that the thermally driven snap-on device of the present invention is different from the prior art in that: the opening and closing of the snap-on is not only affected by the temperature in the disinfection cabinet, but also controlled by the signal of the computer control board. , because the temperature in the disinfection cabinet and other household appliances is not high during ozone disinfection, the existing anti-scald snap lock cannot be closed and locked in time and accurately. If the user accidentally pulls the door, it may Open the door body of the disinfection cabinet and other household appliances, thereby causing the leakage of ozone to endanger the human body; and the thermally driven snap-on device of the present invention overcomes this defect of the prior art. During the use of the ozone disinfection cabinet and other household appliances, Regardless of whether you choose a high-temperature disinfection program or an ozone disinfection program, the computer control board will send a signal to the thermally driven snap-in device through the signal line, and the electric heater assembly installed in the thermally driven snap-in device will start heating after receiving the working signal. The bimetal sheet, that is, the bimetal sheet, is heated, and the heated metal sheet is elastically deformed and then tilted, thereby driving the mechanical linkage hook device to lock the hook connector on the door body downward, preventing the door body from being pulled open ; After the disinfection is finished, the computer control board will send the signal to the thermal drive snap-in device through the signal line again, and the electric heater assembly arranged in the thermal drive snap-in device will stop heating after receiving the working signal so that the bimetallic sheet That is, the metal sheet gradually returns to the reset temperature, and the metal sheet lifted by the elastic deformation returns to the initial state, thereby driving the mechanical interlocking hook device upward and detaching from the hook connector on the door body. At this time, the door body can be closed. pull away. Therefore, the accuracy and reliability of the door body switch are effectively improved, and the occurrence of misoperation by the user and the like is prevented.

As shown in Figure 5, it is a schematic diagram of the mechanism of the non-working state of the thermally driven snap-on device of the present invention; as shown in Figure 6, it is a schematic diagram of the mechanism of the working state of the thermally driven snap-in device of the present invention; in conjunction with Figure 4, when the door body 5 is closed After starting the power supply to work, the computer control board 1 will transmit the electric signal to the electric heater assembly 31 in the heat-driven snap-on device 3 through the signal line 2, and the electric heater assembly 31 will start to work, and the temperature will reach a certain level. During temperature, bimetallic strip 321 namely bimetallic strip is just warped to one side, and the mechanical interlock hook device 322 of the hook structure that contacts with it starts to act, hooks the hook connector 51 on the door body 5, makes The door body 5 cannot be pulled out, and the signal source has been tracked and monitored during the working period. When the time set by the computer control board 1 is reached, the computer control board 1 transmits an electric signal to the thermally driven snap-on device 3 through the signal line 2. The electric heater assembly 31, the electric heater assembly 31 just stops working, and when the temperature drops to a certain temperature, the bimetallic strip 321, that is, the bimetallic strip, is warped to another opposite direction, and the hook structure in contact with it The mechanical interlocking hook device 322 stops moving, and the hook connector 51 hooked on the door body 5 is disengaged, so that the door body 5 can be pulled out, and the working cycle ends. When disinfection cabinet and other household appliances were started for disinfection, when the thermodynamically driven snap-on device 3 monitored the value set by the computer control panel 1 again through the signal line 2, each part in the thermodynamically-driven snap-on device 3 would repeat the above procedure.

Claims (12)

1. A disinfection cabinet that adopts a heat-driven snap lock is characterized in that the disinfection cabinet includes a hollow cavity and a door, and the hollow cavity or the door is respectively equipped with a heat-driven snap lock and a hook connection part (51), the thermally driven snap is an active and/or passive thermally driven snap, and the snap includes a base plate on which is provided a fixed point for fixing one end of the bimetallic sheet (321) (323), and a fixing device (324) for pivotally fixing the hook device (322), the hook device (322) can move around the pivot on the fixing device (324), the hook device The end of the forearm of (322) is provided with a crotch (3221), and the end of the rear arm of the hook device (322) is provided with "<" type fork (3222), the length of the rear arm of the hook device (322) Less than the length of the forearm of the hook device (322), the other end of the bimetallic sheet (321) is inserted in the "<" type fork (3222), and the bimetallic sheet (321) is elastic and can generate An elastically deformable bimetallic sheet, the bimetallic sheet (321) is dish-shaped. 2. The disinfection cabinet according to claim 1, characterized in that: an electric heater assembly (31) is arranged on the snap-on base plate. 3. The disinfection cabinet according to claim 2, characterized in that: a high temperature resistant connection line (312) conveniently connected to the signal line (2) is provided on the electric heater assembly (31). 4. The disinfection cabinet according to claim 1, characterized in that: the length of the rear arm of the hook device (322) is less than the length of the forearm of the hook device (322). 5. The disinfection cabinet according to claim 4, characterized in that: the length of the rear arm of the hook device (322) is 10-40% of the length of the forearm of the hook device (322). 6. The disinfection cabinet according to claim 5, characterized in that: the length of the rear arm of the hook device (322) is 15-25% of the length of the forearm of the hook device (322). 7. The disinfection cabinet according to claim 1, characterized in that: the thermally driven snap lock further comprises a shield (34), and the shield (34) is fixed on the base plate (32), One end of the cover (34) offers a slot (341) to facilitate the movement of the forearm that the hook device (322) stretches out. 8. The disinfection cabinet according to claim 1, characterized in that: a hook connector (51) matching the end hook (3221) of the forearm of the hook device (322) is provided on the door body. 9. The disinfection cabinet according to claim 1, characterized in that: the center of gravity of the hook device (322) is between the pivot on the fixing device (324) and the end hook (3221). 10. The disinfection cabinet according to claim 1, characterized in that: the end hook (3221) moves up and down. 11. The disinfection cabinet according to claim 1, characterized in that: when the thermally driven snap lock is in the closed state, the length or installation position of the forearm of the hook device (322) can make the door body open to a maximum of 2cm . 12. The disinfection cabinet according to claim 1, characterized in that: the inward curvature of the hook (3221) contains at least 1/2 of the surface area of the door hook connector (51).

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