Cold storage door heating system and cold storage door assembly

Abstract

A refrigeration house door heating system and a refrigeration house door assembly.The refrigeration house door heating system comprises a contact power supply circuit component and a heating component, the contact power supply circuit component and the heating component are connected in series and used for being in an on state when a door leaf is closed and being in an off state when the door leaf is opened, and the heating component is arranged below the door leaf and used for heating the door leaf. The cold storage door assembly comprises the cold storage door heating system and further comprises the door leaf, a door frame, a hanging wheel mechanism and a lower rail, the door leaf is assembled on the upper portion of the door frame in a sliding mode through the hanging wheel mechanism, the lower rail is assembled on the lower portion of the door frame, and the lower portion of the door leaf is assembled in the lower rail in a sliding mode. The heating component is assembled in the lower track, and the contact power supply circuit component is assembled on the door leaf and the door frame. According to the cold storage door heating system and the cold storage door assembly, the lower rail can be well heated so as to prevent the lower rail and the door leaf from being frozen together, and therefore the normal opening action of the door leaf is not affected.

Description

Technical Field

[0001] This invention relates to the field of cold storage sliding door technology, and in particular to a cold storage door heating system and a cold storage door assembly. Background Technology

[0002] Because cold storage sliding doors operate in high-humidity environments, and due to frequent opening and closing, liquid can easily accumulate on the bottom track due to temperature differences. This liquid can cause the bottom of the sliding door and the bottom track to freeze together. Therefore, a heating system is installed between the bottom of the sliding door and the bottom track. Many existing heating systems are normally closed. With a normally closed system, the wires in the heating system are often made of spring wire. However, spring wire is prone to being stretched and straightened frequently, which can cause it to break. On the other hand, using straight wire can easily snag on things. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a cold storage door heating system and a cold storage door assembly, which can effectively heat the lower track to prevent the lower track from freezing together with the door leaf, thereby not affecting the normal opening action of the door leaf.

[0004] This invention provides a cold storage door heating system, including a contact component, a power supply circuit, and a heating component. The contact component is mounted on the door frame and the door leaf, and is electrically connected to the power supply circuit. When the door frame and the door leaf are in a closed state, the power supply circuit is in a conductive state, and when the door frame and the door leaf are in an open state, the power supply circuit is in a disconnected state. The power supply circuit is disposed on the door leaf, and the heating component is connected in series with the power supply circuit and disposed at the bottom of the door leaf. The heating component is in sliding contact with the lower track below the door frame.

[0005] In one embodiment, the contact member includes a positive contact terminal and a negative contact terminal. The positive contact terminal is disposed on the door leaf and the door frame, and is disposed on the positive line of the power supply circuit. The negative contact terminal is disposed on the door leaf and the door frame, and is disposed on the negative line of the power supply circuit. When the door leaf and the door frame are in a closed state, the positive and negative contact terminals cause the power supply circuit to be in a conductive state.

[0006] In one embodiment, both the positive and negative contact terminals include a first insulating element, a first terminal, a second insulating element, and a second terminal. The first insulating element is embedded in the door leaf, the first terminal is assembled in the first insulating element, the second insulating element is assembled on the door frame, the second terminal is assembled in the second insulating element, the first terminal and the second terminal are connected in series in the power supply circuit, and the first terminal and the second terminal are positioned opposite each other.

[0007] In one embodiment, the second terminal includes a contact copper busbar, a spring, and a connecting copper busbar. The contact copper busbar is connected to the connecting copper busbar via the spring. The connecting copper busbar is assembled inside the second insulating component and is connected in series in the power supply circuit.

[0008] In one embodiment, the power supply circuit includes a power supply unit and a control unit, wherein the power supply unit and the control unit are connected in parallel, and the heating component and the contact component are connected in series on the power supply unit.

[0009] In one embodiment, the power supply unit includes a fuse and a normally open contact of an intermediate relay, the fuse and the normally open contact of the intermediate relay being connected in series to form a power supply circuit, and the positive contact terminal, the negative contact terminal and the heating element being connected in series in the power supply circuit.

[0010] In one embodiment, the control unit includes an intermediate relay coil, a time relay, and a limit switch, wherein the intermediate relay coil, the time relay, and the limit switch are connected in series to form the control unit, and the control unit is connected in parallel with the power supply unit.

[0011] In one embodiment, the contact mechanism includes a magnet portion and a switch portion. The magnet portion is mounted on the door frame, and the switch portion is connected in series with the power supply circuit. The magnet portion and the switch portion are positioned opposite each other to form a door magnetic switch.

[0012] The present invention also provides a cold storage door assembly, including the cold storage door heating system described above, and further including a door leaf, a door frame, a hanging wheel mechanism and a lower track. The door leaf is slidably mounted on the upper part of the door frame via the hanging wheel mechanism, the lower track is mounted on the lower part of the door frame, and the lower part of the door leaf is slidably mounted in the lower track. The heating component is mounted on the bottom of the door leaf and slides in contact with the lower track. The contact component is mounted on the door leaf and the door frame, and the power supply circuit is mounted on the door leaf.

[0013] The cold storage door heating system and cold storage door assembly provided by this invention can effectively heat the lower track to prevent the lower track from freezing together with the door leaf, thus not affecting the normal opening and closing of the door leaf. It avoids pulling the wires, ensuring good safety and preventing the wires from getting caught. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a circuit diagram of a cold storage door heating system provided in Embodiment 1 of the present invention.

[0016] Figure 2 This is a schematic diagram of the cold storage door assembly provided in Embodiment 2 of the present invention.

[0017] Figure 3 This is an enlarged schematic diagram of point A of the cold storage door assembly provided in Embodiment 2 of the present invention. Detailed Implementation

[0018] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of the present invention. Based on the description of the present invention, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of the present invention.

[0019] In the description of this invention, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0020] The terms “upper,” “lower,” “left,” “right,” “front,” “back,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use. They are only for the convenience of description and simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0021] The terms “first,” “second,” “third,” etc., are used merely to distinguish elements with similar attributes, not to indicate or imply relative importance or a specific order.

[0022] The terms “include,” “comprising,” or any other variation thereof are intended to cover non-exclusive inclusion, which includes not only the elements listed but also other elements not expressly listed.

[0023] Example 1

[0024] Please see Figure 1 The cold storage door heating system provided by the present invention includes a contact component, a power supply circuit, and a heating component R. The contact component is assembled on the door frame 3 and the door leaf 2, and is electrically connected to the power supply circuit. When the door frame 3 and the door leaf 2 are in a closed state, the power supply circuit is in a conducting state, and when the door frame 3 and the door leaf 2 are in an open state, the power supply circuit is in a disconnected state. The power supply circuit is located on the door leaf 2. The heating component R is connected in series with the power supply circuit and is located at the bottom of the door leaf. The heating component is in sliding contact with the lower track 4 below the door frame.

[0025] It is understandable that due to the frequent opening and closing of door leaf 2, condensation is likely to occur. The condensation will flow down door leaf 2 into the lower track 4. Therefore, when door leaf 2 is closed, the contact power supply circuit component is in a closed state, and the heating component R can be a constant temperature heating component, which can heat the lower track 4 below door leaf 2 at a constant temperature, thereby preventing door leaf 2 from freezing together with the lower track 4. When in the open state, the contact power supply circuit component will be in a closed state, and the heating component will stop heating. The heating component R can be a heating strip, which is integrated into the bottom of door leaf 2 and is in close contact with the lower track 4.

[0026] Please see Figure 2 and 3 In some embodiments, the contact component includes a positive contact end 101 and a negative contact end 102. The positive contact end 101 is disposed on the door leaf 2 and the door frame 3, and the positive contact end 102 is disposed on the positive line of the power supply circuit. The negative contact end 102 is disposed on the door leaf 2 and the door frame 3, and the negative contact end 102 is disposed on the negative line of the power supply circuit. When the door leaf 2 and the door frame 3 are in the closed state, the positive contact end 101 and the negative contact end 102 make the power supply circuit in the conducting state.

[0027] It is understandable that the positive contact terminal 101 is respectively set on the door frame 3 and the door leaf 2. Similarly, the negative contact terminal 102 is also respectively set on the door frame 3 and the door leaf 2. When the door leaf 2 is closed, both the positive contact terminal 101 and the negative contact terminal 102 are in the closed state, the control circuit is in the conducting state, and thus the power supply circuit is in the conducting state.

[0028] Please see Figure 3 In some embodiments, both the positive contact 101 and the negative contact 102 include a first insulating element, a first terminal 101c, a second insulating element, and a second terminal. The first insulating element is embedded in the door leaf 2, the first terminal 101c is assembled in the first insulating element, the second insulating element is assembled on the door frame 3, and the second terminal is assembled in the second insulating element. The first terminal 101c and the second terminal are connected in series in the power supply circuit, and the positions of the first terminal 101c and the second terminal are opposite to each other.

[0029] It is understood that both the first insulating component and the second insulating component may include an insulating plastic shell 101b and an insulating base 101a. The insulating plastic shell 101b may be mounted on the door frame 3 and the door leaf 2. The insulating base 101a is mounted inside the insulating plastic shell 101b. The first terminal 101c and the second terminal are mounted on the insulating base 101a. An insulating plate 101g may also be provided between adjacent first terminals 101c or second terminals on the door leaf 2 or the door frame 3, thereby effectively preventing the occurrence of short circuits.

[0030] Please continue reading. Figure 3 In some embodiments, the second terminal includes a contact copper busbar 101f, a spring 101e, and a connecting copper busbar 101d. The contact copper busbar 101f is connected to the connecting copper busbar 101d through the spring 101e. The connecting copper busbar 101d is assembled inside the second insulating component and is connected in series in the power supply circuit.

[0031] It is understood that the contact copper busbar 101f, spring 101e, and connecting copper busbar 101d are all made of conductive material. Spring 101e may include an elastic body and a copper busbar plate. The copper busbar plate is placed on both sides of the elastic body, and its length is less than the length of the elastic body when there is no external force. When the door is closed, the contact copper busbar 101f abuts against the first terminal 101c under the elastic force of the spring body. Spring 101e is in a compressed state. The elastic force of spring 101e is much less than the weight of door 2. The second terminal of this structure can make good contact when the door 2 is closed.

[0032] Please see Figure 1 In some embodiments, the power supply circuit includes a power supply unit and a control unit, the power supply unit and the control unit are connected in parallel, the heating element R and the contact element are connected in series on the power supply unit, the power supply unit includes a fuse FU6A and the normally open contact of the intermediate relay KA1, the normally open contact of the fuse FU6A and the intermediate relay KA1 are connected in series to form the power supply unit, the positive contact terminal 101, the negative contact terminal 102 and the heating element R are connected in series on the power supply unit.

[0033] It is known that when door 2 is closed, the control unit is in the conducting state. The coil of the intermediate relay KA1 in the control unit will cause the normally open contact of the intermediate relay KA1 to be closed, thereby turning on the power supply unit and putting the heating component R into operation. The fuse FU6A can effectively provide short-circuit protection and overload protection.

[0034] Please continue reading. Figure 3 In some embodiments, the control unit includes the coil of intermediate relay KA1, time relay KT, and limit switch SQ, which are connected in series to form the control unit.

[0035] It is known that when door 2 is closed, limit switch SQ is in the closed state, and time relay KT will also be in the closed state after a predetermined time, thus making the control circuit in the conducting state. After current is applied to the coil of intermediate relay KA1, the normally open contact of intermediate relay KA1 will be closed, thus making the power supply unit in the conducting state. This control unit allows frequent power on and off.

[0036] Example 2

[0037] The difference between this embodiment and Embodiment 1 is that the contact structure includes a magnet part and a switch part. The magnet part is assembled on the door frame 3, and the switch part is connected in series in the power supply circuit. The magnet part and the switch part are positioned opposite each other to form a door magnetic switch.

[0038] It is understandable that the magnetic door switch is simpler in form. The power supply circuit of this embodiment may include a time relay KT and a fuse FU6A. The time relay KT, the fuse FU6A and the magnetic door switch are connected in series. When the magnetic door switch is in contact with the magnet, the switch is closed, so that the power supply circuit is turned on. When the magnetic door switch is away from the magnet, the magnetic door switch is normally open, so the power supply circuit is open.

[0039] Example 3

[0040] Please see Figure 2 and Figure 3 This embodiment provides a cold storage door assembly, including the aforementioned cold storage door heating system, and further including a door leaf 2, a door frame 3, a hanging wheel mechanism, and a lower track 4. The door leaf 2 is slidably mounted on the upper part of the door frame 3 via the hanging wheel mechanism, and the lower track 4 is mounted on the lower part of the door frame 3. The lower part of the door leaf 2 is slidably mounted in the lower track 4. The heating component R is mounted on the bottom of the door leaf 2 and slides in contact with the lower track 4. The contact component is mounted on the door leaf 2 and the door frame 3. The power supply circuit is mounted on the door leaf 2.

[0041] It is understandable that an insulating protective pad can be installed inside the lower track 4. The insulating protective pad is placed between the heating component R and the lower track 4 to serve as insulation. The insulating protective pad can also transfer heat from the heating component R. The heating component R and the insulating protective pad can slide in contact. The hanging wheel mechanism can be a structure that can be purchased on the market.

[0042] As can be seen from the above description, the cold storage door heating system and cold storage door assembly provided by the present invention can effectively heat the lower track 4 to prevent the lower track 4 from freezing together with the door leaf 2, thereby not affecting the normal opening action of the door leaf 2, avoiding the pulling of the wire, ensuring good safety, and preventing the wire from getting caught.

[0043] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A cold storage door heating system, characterized in that, The device includes a contact component, a power supply circuit, and a heating component. The contact component is mounted on the door frame and the door leaf, and is electrically connected to the power supply circuit. When the door frame and the door leaf are in a closed state, the power supply circuit is in a conductive state, and when the door frame and the door leaf are in an open state, the power supply circuit is in a disconnected state. The power supply circuit is located on the door leaf. The heating component is connected in series with the power supply circuit and is located at the bottom of the door leaf. The heating component is in sliding contact with the lower track below the door frame.

2. The cold storage door heating system as described in claim 1, characterized in that, The contact component includes a positive contact terminal and a negative contact terminal. The positive contact terminal is disposed on the door leaf and the door frame, and is disposed on the positive line of the power supply circuit. The negative contact terminal is disposed on the door leaf and the door frame, and is disposed on the negative line of the power supply circuit. When the door leaf and the door frame are in the closed state, the positive contact terminal and the negative contact terminal make the power supply circuit in a conductive state.

3. The cold storage door heating system as described in claim 2, characterized in that, Both the positive and negative contact terminals include a first insulating element, a first terminal, a second insulating element, and a second terminal. The first insulating element is embedded in the door leaf, the first terminal is assembled in the first insulating element, the second insulating element is assembled on the door frame, and the second terminal is assembled in the second insulating element. The first terminal and the second terminal are connected in series in the power supply circuit, and the positions of the first terminal and the second terminal are opposite to each other.

4. The cold storage door heating system as described in claim 3, characterized in that, The second terminal includes a contact copper busbar, a spring, and a connecting copper busbar. The contact copper busbar is connected to the connecting copper busbar through the spring. The connecting copper busbar is assembled inside the second insulating component and is connected in series in the power supply circuit.

5. The cold storage door heating system as described in claim 4, characterized in that, The power supply circuit includes a power supply unit and a control unit. The power supply unit and the control unit are connected in parallel. The heating component and the contact component are connected in series on the power supply unit.

6. The cold storage door heating system as described in claim 5, characterized in that, The power supply unit includes a fuse and a normally open contact of an intermediate relay. The normally open contact of the fuse and the intermediate relay are connected in series to form a power supply circuit. The positive contact terminal, the negative contact terminal, and the heating component are connected in series in the power supply circuit.

7. The cold storage door heating system as described in claim 5, characterized in that, The control unit includes an intermediate relay coil, a time relay, and a limit switch. The intermediate relay coil, the time relay, and the limit switch are connected in series to form the control unit, and the control unit is connected in parallel with the power supply unit.

8. The cold storage door heating system as described in claim 1, characterized in that, The contact mechanism includes a magnet part and a switch part. The magnet part is mounted on the door frame, and the switch part is connected in series with the power supply circuit. The magnet part and the switch part are positioned opposite each other to form a door magnetic switch.

9. A cold storage door assembly, characterized in that, The cold storage door heating system according to any one of claims 1 to 8 further includes a door leaf, a door frame, a hanging wheel mechanism, and a lower track. The door leaf is slidably mounted on the upper part of the door frame via the hanging wheel mechanism. The lower track is mounted on the lower part of the door frame, and the lower part of the door leaf is slidably mounted in the lower track. The heating component is mounted on the bottom of the door leaf and slides in contact with the lower track. The contact component is mounted on the door leaf and the door frame. The power supply circuit is mounted on the door leaf.

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