KR101022484B1 - Apparatus for saving and preventing thermal insulation door from freezing in cold storage warehouse - Google Patents

Abstract

The present invention relates to a freezing prevention and safety device of the freezer warehouse heat dissipation door, in particular, the tab switch settle groove is formed long in the vertical direction along the center line on one surface, a pair of gasket coupling groove in the vertical direction in the cross section of the front and rear wing pieces A pair of brackets formed on an inner wall of the tap switch settling groove and having a configuration in which a heater installation groove is formed and fixedly installed in a direction opposite to each other on a contact surface of the heat dissipation door; Round bar-type fixing projections are formed integrally in the vertical direction at both ends and bent in a semi-circular shape, and the round bar-type fixing projections are inserted into the gasket coupling grooves of the bracket to be fixed so that contact gaps between the heat-dissipating doors are generated. A pair of gaskets that prevent the leakage of cold air therethrough; One side of the inner side of the hollow rubber housing has a round rod-type movable terminal is installed, and the other side is a plate-shaped fixed terminal is installed and fixed in the settling groove of the bracket is long fixed due to the pinch of a specific object or person between the heat dissipation door A pair of bar-type tap switches which, when a part of the type movable terminal is connected to the plate type fixed terminal, sense that the control unit blocks the driving of the motor or controls the heat dissipation door to be driven in the open direction; A heater installed in the heater installation groove of the bracket to prevent condensation and freezing from occurring in the bracket and the gasket when the driving voltage is output from the heater driver under control of the controller; In response to the opening or closing of the heat dissipation door of the key input part operated by the user, a forward and reverse driving signal is generated for the motor for opening and closing the heat dissipation door, and the motor is driven when the tap switch is “on” while the heat dissipation door is opened. A control unit for blocking the operation or operating by a predetermined rotation speed in the open direction, and detecting a difference between the inside and the outside of the freezer through temperature sensors and driving the heater when the difference is greater than or equal to the temperature difference stored in the refrigerator; A motor driver for driving the heat dissipation door opening and closing motor in a forward or reverse direction in response to an output signal of the controller; And a heater driver configured to control driving of the heater in response to an output signal of the controller.

Therefore, the impact force generated when the sliding heat dissipation door is closed can be greatly alleviated, and the airtight force of the contact portion is greatly increased to prevent the loss of cold air in the freezer warehouse to the maximum, and also the freezing through the heat generated by the heater. Due to the temperature difference inside and outside the warehouse, it is possible to completely prevent condensation and freezing caused by the gasket installed at the contact between the two heat dissipation doors. This can be detected accurately when it is stuck and the heat dissipation door can be reopened, thus greatly securing safety.

Freezer, Heat Dissipation Door, Condensation, Freezing, Gassuke, Tap Switch, Heater

Description

{Apparatus for saving and preventing thermal insulation door from freezing in cold storage warehouse}

The present invention relates to a freezing prevention and safety device of a freezer heat storage door, and more particularly, one or two contact surfaces for a pair of heat dissipation doors installed at the doorway of the freezer warehouse and opened and closed by sliding along a rail. A gasket for cushioning and airtightness, a bar-type tap switch, and a bracket with several coil or plate heaters are installed, respectively, to greatly reduce the impact force generated when the sliding door is closed. It can prevent the loss of cold air in the freezer as much as possible and also prevent the freezing due to dew condensation that can occur in the gasket installed at the contact between the two heat dissipation doors due to the difference between the inside and outside of the freezer. Also, when a heat door is closed, a certain object or person is caught between two heat doors. Hebrews detect and to allow heat to open the doors closed and will re-invented to significantly ensure safety.

In general, the freezer is a function to store food or objects that require low temperature storage, and is provided with an entrance through which people or equipment can enter or remove the stored items.

Therefore, the entrance of the freezer door should be easy for people or equipment to enter and exit, and at the same time have a heat dissipation function so that cold air inside the freezer does not leak to the outside of the heat dissipation door.

On the other hand, among the heat dissipation doors mounted at the entrance of the freezer, sliding (ie sliding) heat dissipation doors, unlike sliding heat dissipation doors, minimize the loss of cold air in the freezer by close contact with the rubber packing or gasket fixed to the joint surface of the heat dissipation door. It is manufactured to block, but due to the extreme temperature difference between the inside and outside of the seal or gasket can not completely prevent the freezing of the heat dissipation door has been required to prevent it to the maximum.

Therefore, in the conventional heat dissipation door, the freezing of the packing or gasket cannot be completely prevented and the surroundings of the packing are frozen. Therefore, the original elasticity of the packing or the gasket is lost. Even if it is opened and closed, it is necessary to apply excessive force, so that the packing or gasket is torn, causing loss of cold air.

In addition, when the heat dissipation door is electric, the motor may be damaged due to excessive load on the motor, and if this phenomenon occurs while the worker is working in the freezer, the freezing door may not be opened and closed, which may cause the worker to escape from the freezer. Would have been concerned.

Accordingly, in the freezing prevention device of the double sliding door heating door of the Korea Utility Model Publication No. 1980-0002158, a type of air tunnel is formed when the thermal door is closed by attaching a packing to the joint sides of the double sliding doors installed in the freezing chamber. As far as is known, a concave groove is provided in a suitable place of the packing portion, but a heating chamber is embedded therein to form a heating chamber in which a heating plate is laminated.

However, such a configuration is not only to prevent the freezing of the packing by simply installing a heating wire on one side of the packing installed at the contact portion of the heat dissipation door so that the heating chamber is formed in the space between the packings. Since the heating wire itself is not installed inside the packing but is exposed to the outside of the contact portion of the heat dissipation door exposed to the air, the love due to the temperature difference generated inside the packing cannot be prevented.

In addition, there is no safety device that detects when a certain object or person is caught between the two heat doors while the heat door is closed. When the packings are installed in a mutually staggered position, the outer peripheral surface of the packing installed in the heat dissipation door on the opposite side is in contact with the contact part of the other heat dissipation door when it is closed by the heat dissipation door. There is also a problem in that the efficiency of the airtightness for the contact portion of the heat dissipation door is lowered as compared to the configuration installed.

In addition, there is a sliding heat dissipation door has been presented in Korea Patent Publication No. 10-2006-0081512, which comprises a door frame and a door surface material consisting of steel in the sliding type heat dissipation door is made of urethane foam applied to the inside, The door frame on the four sides is made of aluminum, the door frame side that is mutually fastened when the sliding doors on both sides is closed, the packing is formed with a locking rod in the form of a straight bar, and the packing groove so that the plurality of the packing can be fixed It is configured to include a door frame that is configured to couple, and the heating wire groove is selectively configured to prevent the heating wire with the separation frame to contact with the packing when the sliding binding.

However, this heat dissipation door is proposed as a way to solve the problem of the heat dissipation door of the conventional refrigerated warehouse for producing the mold using wood, it is simpler to manufacture than the heat dissipation door of the wood, mass production is possible, and also the weight Its light weight makes it simple to install and shorten the installation cost and time, and has the advantage that it can be replaced and repaired when it finds the abnormality of the packing due to long-term use, while the heating wire itself is not installed inside the packing. Since a hot wire groove having a shape identical to that of the packing groove is formed in the frame and inserted into the heating groove, the love due to the temperature difference generated inside the packing cannot be prevented.

In addition, the heat dissipation door having such a configuration is not equipped with a safety device at all, and if a specific object or person is caught between the two heat dissipation doors while the heat dissipation door is closed, safety accidents caused by this cannot be prevented. The packing and heating wires installed in the door frame contact part of the door are placed in a staggered position so that when the door is closed by the heat dissipation door, the outer circumferential surface of the packing installed on the heat dissipation door on the opposite side is in contact with the outside of the heating wire installed in the contact part of the other heat dissipation door. Compared with the configuration in which the two packings having excellent elasticity are in contact with each other, the efficiency of maintaining the airtightness with respect to the contact portion of the heat dissipation door is low.

On the other hand, some heat dissipation doors have a method of detecting whether a specific object or human body is caught between the heat dissipation doors by installing a wooden bar at a contact portion of the heat dissipation door, and installing a long spring and a switch. Silver long spring is installed in the center of the wooden bar, but when one end of the spring is connected to the switch, if the specific object or human body is caught between the heat dissipation door, the spring is configured to operate the switch so that the specific object or human body is caught There is a problem that the function as a safety device is uncertain because the exact detection is not made depending on the location.

The present invention has been made to solve such a conventional problem, one or two impact force mitigation and airtight on the contact surface for a pair of heat dissipation door is installed at the doorway of the freezer and sliding along the rails to open and close Brackets equipped with a retaining gasket, a bar tap switch, and several coil or plate heaters are installed respectively to greatly reduce the impact force generated when the sliding heat dissipation door is closed. It can prevent the loss of cold air in the freezer as much as possible, and can completely prevent condensation and freezing caused by the gasket installed at the contact between the two heat dissipation doors due to the temperature difference between the inside and outside of the freezer. Also, when a heat sink is closed, a certain object or person is caught between the two heat sinks. The object of the present invention is to provide a freezing prevention and safety device for a freezer heat storage door that can significantly secure safety by allowing the heat door that is detected and closed to be opened again.

The present invention for achieving the above object, the freezing prevention and safety of the contact portion for the pair of sliding heat dissipation doors respectively installed on both sides of the entrance and exit of the freezer warehouse to open and close in response to the driving direction of the motor operated in the forward and reverse directions In constructing the device, a tab switch settling groove is elongated in a vertical direction along a center line on one surface thereof, and a pair of gasket engaging grooves having an "Ω" shape in a vertical direction in cross sections of the front and rear blade pieces are formed. A pair of brackets having a configuration in which a heater installation groove is formed on an inner wall of the tap switch settling groove and fixedly installed in a direction facing each other on the contact surface of the heat dissipation door; Round bar-type fixing projections are formed integrally in the vertical direction at both ends and bent in a semi-circular shape, and the round bar-type fixing projections are inserted into the gasket coupling grooves of the bracket to be fixed so that contact gaps between the heat-dissipating doors are generated. A pair of gaskets that prevent the leakage of cold air therethrough; One side of the inner side of the hollow rubber housing has a round rod-type movable terminal is installed, and the other side is a plate-shaped fixed terminal is installed and fixed in the settling groove of the bracket is long fixed due to the pinch of a specific object or person between the heat dissipation door A pair of bar-type tap switches which, when a part of the type movable terminal is connected to the plate type fixed terminal, sense that the control unit blocks the driving of the motor or controls the heat dissipation door to be driven in the open direction; A heater installed in the heater installation groove of the bracket to prevent condensation and freezing from occurring in the bracket and the gasket when the driving voltage is output from the heater driver under control of the controller; In response to the opening or closing of the heat dissipation door of the key input part operated by the user, a forward and reverse driving signal is generated for the motor for opening and closing the heat dissipation door, and the motor is driven when the tap switch is “on” while the heat dissipation door is being opened. A control unit for blocking the operation or operating by a predetermined rotation speed in the open direction, and detecting a difference between the inside and the outside of the freezer through temperature sensors and driving the heater when the difference is greater than or equal to the temperature difference stored in the refrigerator; A motor driver for driving the heat dissipation door opening and closing motor in a forward or reverse direction in response to an output signal of the controller; And a heater driver configured to control driving of the heater in response to an output signal of the controller.

The bar-shaped tap switch is mounted on the switch bracket, characterized in that installed in the tab switch settling groove of the bracket.

At this time, the front and rear of the rubber housing of the bar-shaped tap switch forms a locking groove into which the hook of the switch bracket is fitted, and the switch bracket coupled to the bar-shaped tap switch is extruded to have a flat surface having a "c" shape. However, the front and rear projections of the switch bracket is characterized in that the engaging ring which is fitted into the engaging groove formed on the front and rear of the rubber housing of the bar-shaped tap switch, respectively formed integrally.

In addition, the heater is characterized in that it comprises a coil heater and a plate heater.

In addition, the heater mounting groove formed on the inner wall of the tap switch settling groove of the bracket is characterized in that it is formed either at the same time or a pair of coil-type heater mounting groove or plate heater mounting groove corresponding to the shape of the heater.

Further, another pair of gasket coupling grooves may be further formed inside the pair of gasket coupling grooves formed in the vertical direction at the front and rear wing pieces of the bracket, and the gaskets may be further installed therein.

As described above, according to the present invention, one or two impact gaskets and bar type tap switches, and several coiled or plate heaters are integrated on the contact surfaces of the heat dissipation doors installed at the entrance and exit of the freezer. By installing each of the brackets provided, the impact force generated when the sliding heat dissipation door is closed can be greatly alleviated, and the airtight force of the contact portion can be greatly increased to prevent the loss of cold air in the freezer as much as possible. Through the heat generated from the inside and outside temperature of the freezer warehouse, it is possible to completely prevent condensation and freezing occurring in the gasket installed at the contact between the two heat dissipation doors. When a certain object or person gets caught in between, it will detect the problem correctly and reopen the heat door. It is a very useful invention, such as being able to secure safety significantly.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 1 shows a front view of the freezer door entrance in which the present invention is implemented, Figure 2 shows an enlarged perspective view of the main portion of the present invention, Figure 3 shows a block diagram of the device of the present invention, Figure 4 is a view An enlarged cross-sectional view of part A of FIG. 1 is shown, and FIG. 5 is a sectional view showing an operating state when a specific object is sandwiched between the heat dissipation doors to which the present invention device is applied, and FIG. It shows an enlarged cross-sectional view showing the main part.

According to the present invention, the apparatus for preventing the freezing of the contact portion for the pair of sliding heat dissipating doors 1 installed on both sides of the doorway of the freezer and opened and closed in response to the driving direction of the motor 71 operated in the forward and reverse directions, and In constructing safety devices,

 In one side, the tap switch settled groove 22 is formed long in the vertical direction along the center line, and a pair of gasket coupling grooves 23 having a "Ω" shape in the vertical direction in the cross section of the front and rear wing pieces 21 are formed. A pair of brackets 2 having a configuration in which a heater installation groove 24 is formed on an inner wall of the tap switch settle groove 22 and fixedly installed in a direction opposite to each other on a contact surface of the heat dissipation door 1;

The rod-shaped fixing protrusion 31 is integrally molded at both ends in the vertical direction, and the rod-shaped fixing protrusion 31 is fitted into the gasket coupling groove 23 of the bracket 2 and fixed in a semicircular shape. A pair of gaskets 3 for preventing the occurrence of contact gaps of the heat dissipation doors 1 when the heat dissipation doors 1 are closed to prevent the outflow of cold air;

One of the inner surfaces of the hollow rubber housing 41 has a configuration in which a round bar type movable terminal 42 is installed, and the other side of the hollow rubber housing 41 is provided with a plate-shaped fixed terminal 43, and is long in the switch settling groove 22 of the bracket 2. When a part of the round bar-type movable terminal 42 is connected to the plate-shaped fixed terminal 43 due to a certain object or person being pinched between the heat dissipation doors 1, the controller 6 detects this and the motor 71 A pair of bar-type tap switches 4 for blocking driving or controlling the heat dissipation door 1 to be driven in the opening direction;

When the driving voltage is output from the heater driver 8 installed in the heater installation groove 24 of the bracket 2 and controlled by the controller 6, condensation and freezing may occur in the bracket 2 and the gasket 3 through heat generation. A heater 5 for preventing the occurrence of this;

In response to the opening or closing switch of the heat dissipation door of the key input unit 9 operated by the user, a positive and reverse driving signal is generated for the heat dissipation door opening and closing motor 71, and the tab of the heat dissipation door 1 is opened. When the switch 4 is "on", the drive of the motor 71 is blocked or operated by a predetermined rotation speed in the open direction, and the temperature sensor 10 detects the temperature difference between the inside and outside of the freezer warehouse so that the difference is itself. A control unit 6 which controls to drive the heater 5 when the temperature difference is greater than or equal to the temperature stored therein;

A motor driver 7 for driving the heat dissipation door opening and closing motor 71 in a forward or reverse direction in response to an output signal of the controller 6;

And a heater driver 8 for controlling the driving of the heater 5 in response to the output signal of the controller 6.

The bar-shaped tap switch 4 is mounted on the switch bracket 11 and installed in the tap switch settling groove 22 of the bracket 2.

In this case, the front and rear surfaces of the rubber housing 41 of the bar-shaped tap switch 4 are formed with a catching groove 41a through which the catching ring 11b of the switch bracket 11 is fitted, and the bar-shaped tap switch 4 Switch bracket 11 is coupled to the extrusion is formed so that the flat cross-section having a "c" shape, the front end of the front and rear projections (11a) of the switch bracket 11, the rubber housing 41 of the bar-shaped tap switch (4) It is characterized in that the engaging ring (11b) to be fitted into the engaging groove (41a) formed on the front, rear surface, respectively formed integrally.

In addition, the heater 5 is characterized in that it comprises a coil heater 51 and a plate heater (52).

In addition, as the heater installation groove 24 formed on the inner wall of the tap switch settling groove 22 of the bracket 2, a pair of coil-type heater installation grooves 24a or a plate heater installation groove ( 24b), or characterized in that formed at the same time.

Further, another pair of gasket coupling grooves 23 are further formed inside the pair of gasket coupling grooves 23 formed in the vertical direction at the front and rear wing piece cross sections of the bracket 2, and the gaskets 3 are respectively formed. It is characterized by further installation.

Referring to the operation and effect of the device of the present invention configured as described above are as follows.

First, the freezing prevention and safety device of the freezer warehouse heat dissipation door to which the present invention is applied, the bracket (2) and the gasket (3), the bar tap switch (4), the heater (5), the control unit (6), the motor drive unit (7) And a heater driver 8 as main technical components.

In this case, the bracket 2 is formed by joint molding using a metal having a high passion rate and strong strength (for example, aluminum), and the tab switch settling groove 22 is formed to be long in a vertical direction along a center line on one surface thereof. The front and rear surfaces are extruded to form a blade piece 21 having a predetermined height, respectively, so that a flat cross section has an approximately "-C" shape, and a vertical direction from a cross section of the front and rear wing pieces 21 is provided. A pair or two pairs of "? &Quot; type gasket coupling grooves 23 are formed, and a heater installation groove 24 is formed in the inner wall of the tap switch settle groove 22.

The bracket 2 having such a configuration is fixed to each other in a direction facing each other (ie, the direction in which the tap switch settled grooves 22 face each other) at the contact surface of the heat dissipation door 1, and then the gasket 3 to be described later. And the tap switch 4 and the heaters 5 perform a function that can be internal or external.

The gasket 3 is formed of a thin and long plate using a rubber material having good elasticity, strength, and airtightness, and has a cross section of the blade piece 21 of the bracket 2 in the vertical direction at both ends of the front and rear sides. The round rod-shaped fixing protrusion 31, which is inserted into and fixed to the “Ω” -shaped gasket coupling groove 23, is formed to protrude integrally.

When the gasket 3 having such a configuration is to be fixedly installed on the bracket 2, the round bar-type fixing protrusion 31 protruding from the front and rear ends thereof is bent in a semicircular shape with respect to the longitudinal direction. What is necessary is just to fit in the "(ohm)" type gasket coupling groove 23 formed in the cross section of the blade piece 21 of the bracket 2, respectively.

As such, when the gasket 3 is fixedly installed on the bracket 2, the gasket 3 has a shape that protrudes in a semicircular shape from the contact portion of the heat dissipation door 1, so that when the heat dissipation door 1 is closed, the two gaskets 3 are closed. Since the curved portions come into contact with each other and are elastically partially distorted and face-contacted in response to the contact force, a gap that may occur at the contact portion of the heat dissipation door 1 is completely blocked by the gasket 3.

At this time, since the gasket 3 is formed of a rubber material having good elasticity and elasticity, the gasket 3 blocks the flow of air through the gap formed at the contact portion of the heat dissipation door 1 and therebetween. Since it maintains airtightness, it is possible to completely prevent the cold air in the freezer outflow or the hot outside air outside the heat dissipation door (1) into the freezer, especially the inside of the gasket (3) Since the heat transfer blocking function is very good, it is possible to completely block the heat exchange of cold and hot air through the contact portion of the heat dissipation door (1).

On the other hand, the gasket (3) in consideration of the thickness and size of the heat dissipation door 1, one on each bracket (2) installed in each contact portion of the heat dissipation door 1 as shown in Figure 3 or two as shown in Figure 6 Most of the heat dissipation door (1) may be installed only, but if the heat dissipation door (1) is very large or thick or the impact force applied to each other when the heat dissipation door (1) is closed, the bracket on one side It is good to install two so that they overlap each other in (2).

As described above, in the present invention, the impact force may be alleviated and airtight with respect to the contact portion of the heat dissipation door 1 through one or two gaskets 3. It is possible to greatly improve airtightness and shock absorption.

In addition, when the gasket 3 is hardened due to long-term use or the like, and the elasticity is poor, or damage such as partial tearing occurs, only the gasket 3 is formed on the end face of the blade piece 21 of the bracket 2. Simply remove it from the "Ω" type gasket coupling groove 23 and replace it with a new gasket 3.

In addition, the bar-shaped tap switch 4 is a bar-shaped movable terminal 42 on the opposite surface, that is, one of the inner surfaces of the rubber housing 41 formed in a hollow round bar shape or an elliptical bar shape using a rubber material. And a plate-shaped fixed terminal 43 is installed on the other side, and the upper and lower portions of the rubber housing 41 are closed to prevent the inflow of moisture into the rubber housing 41, thereby being a round bar type switch terminal. It is possible to completely insulate the movable terminal 42 and the plate-shaped fixed terminal 43, as well as to prevent them from rust due to moisture or the like in advance.

Bar-type tap switch 4 having such a configuration is installed in the switch mounting groove 22 of the bracket 2 directly or through a long fixed through the switch bracket 11 so that a specific object or person between the heat radiation door (1) When a part of the round bar-type movable terminal 42 is connected to the plate-shaped fixed terminal 43 due to the pinch, the control unit 6 recognizes this and blocks the driving of the heat-opening door opening / closing control motor 71 or is closed. Control to cause (1) to open in reverse.

At this time, when the bar-shaped tap switch 4 is to be mounted on the switch bracket 11 and installed in the tap switch settle groove 22 of the bracket 2, the rubber housing 41 of the bar-shaped tap switch 4 is installed. Some of the shape of the need to be changed, and also requires the switch bracket 11 separately from the bar-shaped tap switch (4).

Therefore, in the present invention, in this case, the locking groove 41a to which the locking ring 11b of the switch bracket 11 is fitted is further formed on the front and rear of the rubber housing 41 of the bar-type tap switch 4, The switch bracket 11 coupled to the bar tab switch 4 is extruded to have a flat cross section having a “c” shape, and at the end of the front and rear protrusions 11a of the switch bracket 11, the bar tap switch 4 The hook ring 11b to be fitted to the hook groove 41a formed on the front and rear surfaces of the rubber housing 41 of the () is formed integrally.

When the bar-type tap switch 4 is fixedly installed in the switch settling groove 22 of the bracket 2 directly or through the switch bracket 11, the switch settling groove 22 of the bracket 2 is fixed. A part of the bar-shaped tab switch 4 having a state of protruding outwardly is not in contact with the gasket 3 in the space formed between the gasket 3 and the bracket 2 as shown in FIG. 4. Of course, the round bar-type movable terminal 42 installed inside the protruding portion of the bar-shaped tap switch 4 is spaced apart from the plate-shaped fixed terminal 43 in the rubber housing 41 by a predetermined distance, and the bracket 2 The bar-shaped tap switch 4 is " off " unless a strong pressure is exerted through the gasket 3 from the outside. State is maintained.

Of course, even when the heat dissipation door 1 is normally completely closed and the curved portions of the two gaskets 3 come into contact with each other and are elastically partially distorted and face-contacted in response to the contact force, the inner surface of the distorted portion of the gasket 3 is in contact with each other. Since the bar-shaped tap switch 4 is kept in non-contact with the rubber housing 41, the bar-shaped tap switch 4 is kept in an "off" state.

Meanwhile, when a specific object or a human body is caught between the heat dissipation doors 1 while the heat dissipation door is closed or completely closed, the gasket 3 itself is shown in FIG. 5. When the inner surface of the bar-shaped tap switch 4 presses the protrusion of the rubber housing 41 of the bar housing, the rod-shaped movable terminal 42 installed on the inner surface of the protrusion of the rubber housing 41 is fixed. Electrical contact with terminal 43 causes the switch itself to be " on ".

At this time, the bar-shaped tap switch 4 has a shape that is installed long over the entire contact portion of the heat dissipation door 1 as described above, so that a specific object or a human body is located at any position of the contact portion of the heat dissipation door 1. Even if it gets stuck, it detects this and turns on, so the object's jamming function is very good.

As such, when the bar type tap switch 4 is turned “on” due to a specific object or a human body being caught between the two heat dissipating doors 1 while the heat dissipating door 1 is closed or completely closed, the signal is inputted. Received control unit 6 is to block the close drive of the heat dissipation door opening and closing control motor 71, or to operate in reverse by a predetermined number of revolutions in the open direction, so the heat dissipation door (1) while closing a specific object or It can prevent various safety accidents that may be caused by people being caught.

In other words, when the heat dissipation door 1 is closed, it is possible to significantly secure safety.

In addition, the heater 5 includes both a coil heater 51 and a plate heater 52, such a heater (5) is installed in the heater installation groove 24 of the bracket (2) and the control unit ( When the driving voltage is output from the heater driver 8 under the control of 6), the gasket 3 and the bar-type tap switch are generated by the heat generating and the heat generated by the bracket 2 itself and the switch bracket 11 formed of metal having good conductivity. Since it is discharged into the space formed between the gasket (3) and the bracket (2) including the (4) by the internal and external temperature difference of the freezer in the bracket (2) and the gasket (3) and the bar-shaped tap switch (4) It is possible to prevent condensation and freezing that may occur.

At this time, when the heater 5 to be installed is a coil type heater 51, the blade piece 21 in the heater installation groove 24 itself formed in the vertical direction between the blade pieces 21 of the bracket (2) It is sufficient to form a pair of coil-type heater installation grooves 24a in proximity to the field. When the heater 5 itself is a plate heater 52, the plate-shaped heater installation grooves 24b are formed in the middle of the heater installation grooves 24. ) May be formed.

Of course, when installing both the coil-type heater 51 and the plate-type heater 52 to the heater 5, a pair of coil-type heater in close proximity to the blade pieces 21 in the heater installation groove 24 itself The installation groove 24a may be formed, and the plate heater installation groove 24b may be formed in the space between the coil heater installation grooves 24a.

As such, in the present invention, heaters for preventing condensation or freezing that may occur in the gasket 3 installed at the coupling portion of the heat dissipation door 1 may be circular or not in the bracket 2 itself without installing heaters through separate parts. By allowing the plate heater to be inserted or installed at the same time, it is possible to smoothly prevent condensation and freezing that may occur in the gasket 3 installed at the joint of the heat dissipation door 1, It is possible to drastically improve workability due to maintenance, which can greatly reduce the production cost and maintenance cost of the product.

On the other hand, the control unit 6 generates a forward and reverse driving signal for the heat dissipation door opening and closing motor 71 in response to the heat dissipation door opening or the cross switch state of the key input unit 9 normally operated by the user. And, as described above, when the tap switch 4 is "on" while the heat dissipation door 1 is opened, a function of interrupting the driving of the motor 71 or operating by a predetermined rotation speed in the open direction, and a temperature sensor ( By detecting the temperature difference between the inside and outside of the freezer through the 10) and if the difference is more than the temperature difference stored in the self to perform the function of driving the heater (5).

In addition, the motor driving unit 7 performs a function of driving the heat dissipation door opening and closing motor 71 in the forward or reverse direction in response to the output signal of the control unit 6, the heater driving unit 8 is the control unit 6 In response to the output signal of the) is performed to control the driving of the heater (5).

It should be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

1 is a front view of a freezer doorway in which the present invention is implemented.

Figure 2 is an enlarged perspective view of the main portion of the device of the present invention.

3 is a block diagram of an apparatus of the present invention.

4 is an enlarged cross-sectional view of portion A of FIG.

Figure 5 is a cross-sectional view of the operating state when a particular object is sandwiched between the heat dissipation door is implemented device of the present invention.

Figure 6 is an enlarged cross-sectional view showing the main portion showing a state in which the gasket double installed in the present invention.

Explanation of symbols on the main parts of the drawings

1: heat dissipation door 2: bracket

21: wing piece 22: tap switch settle groove

23: gasket coupling groove 24: heater installation groove

24a: Coil type heater installation groove 24b: Plate type heater installation groove

3: gasket 31: round bar type fixing protrusion

4: bar type tap switch 41: rubber housing

42: round bar type movable terminal 43: plate type fixed terminal

41a: Hanging groove 5: Heater

51 coil heater 52 plate heater

6: control unit 7: motor drive unit

71: motor for opening and closing the heat door 8: heater driving unit

9: key input 10: temperature sensor

11: switch bracket 11a: hook

Claims (7)

In constructing the freezing prevention and safety device of the contact portion for the pair of sliding heat dissipation doors respectively installed at both sides of the entrance and exit of the freezer warehouse to open and close in response to the driving direction of the motor operating in the forward and reverse directions, The tab switch settling groove is formed long in the vertical direction along the center line in one surface, and a pair of gasket coupling grooves are formed in the vertical direction in the cross section of the front and rear wing pieces, and the heater mounting groove is formed in the inner wall of the tab switch settling groove. A pair of brackets fixedly installed in a direction opposite to each other on a contact surface of the heat dissipation door; Round bar-type fixing projections are formed integrally in the vertical direction at both ends and bent in a semi-circular shape, and the round bar-type fixing projections are inserted into the gasket coupling grooves of the bracket to be fixed so that contact gaps between the heat-dissipating doors are generated. A pair of gaskets that prevent the leakage of cold air therethrough; One side of the inner side of the hollow rubber housing has a round rod-type movable terminal is installed, and the other side is a plate-shaped fixed terminal is installed and fixed in the settling groove of the bracket is long fixed due to the pinch of a specific object or person between the heat dissipation door A pair of bar-type tap switches which, when a part of the type movable terminal is connected to the plate type fixed terminal, sense that the control unit blocks the driving of the motor or controls the heat dissipation door to be driven in the open direction; A heater installed in the heater installation groove of the bracket to prevent condensation and freezing from occurring in the bracket and the gasket when the driving voltage is output from the heater driving unit under the control of the controller; In response to the opening or closing of the heat dissipation door of the key input part operated by the user, a forward and reverse driving signal is generated for the motor for opening and closing the heat dissipation door, and the motor is driven when the tap switch is “on” while the heat dissipation door is being opened. A control unit for blocking the operation or operating by a predetermined rotation speed in the open direction, and detecting a difference between the inside and the outside of the freezer through temperature sensors and driving the heater when the difference is greater than or equal to the temperature difference stored in the refrigerator; A motor driver for driving the heat dissipation door opening and closing motor in a forward or reverse direction in response to an output signal of the controller; And a heater driver for controlling driving of the heater in response to the output signal of the controller. In claim 1, The bar-type tap switch is mounted on the switch bracket, the freezing prevention and safety device of the freezer heat radiation door, characterized in that installed in the tab switch settle groove of the bracket. The method according to claim 2, Before and after the rubber housing of the bar-type tap switch to form a locking groove to be caught by the locking hook of the switch bracket, the switch bracket coupled to the bar-type tap switch is extrusion molded so that the flat cross-section has a "'" shape, The freezing prevention and safety device of the freezer door heat-dissipating door, characterized in that the front and rear projections of the switch bracket are formed integrally with the hook ring which is fitted into the locking groove formed on the front and rear of the rubber housing of the bar-type tap switch. The method according to claim 1, The heater is freezing prevention and safety device of the cold storage heat radiation door, characterized in that it comprises a coil heater and a plate heater. The method according to any one of claims 1 to 4, The heater mounting groove formed on the inner wall of the tab switch settling groove of the bracket may be one or a plurality of pairs of coil type heater mounting grooves or plate heater mounting grooves formed at the same time to correspond to the shape of the heater. Freeze protection and safety devices. The method according to claim 1, And further forming a pair of gasket coupling grooves inside the pair of gasket coupling grooves formed in the vertical direction at the front and rear wing pieces of the bracket, and further installing gaskets, respectively. safety device. The method according to claim 1, The gasket coupling groove formed on the wing piece end surface of the rail and gasket bracket has a "Ω" shape freezing prevention and safety device of the heat storage door of the freezer.

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