Freezer door lock

Abstract

The utility model relates to the technical field of refrigeration houses, and discloses a freezer door lock which comprises a door lock body and a base plate which are arranged on the two sides of a freezer door respectively, the side wall of the base plate is fixedly connected with a sliding cylinder connected with the door lock body, the side wall of the base plate is provided with a push rod in a penetrating and sliding mode, and the push rod extends into the sliding cylinder. An anti-freezing assembly connected with the push rod is arranged in the sliding cylinder, and one end of the push rod is connected with a separation transmission mechanism connected with the door lock body. The anti-freezing assembly and the separation transmission mechanism are arranged, the push rod can be prevented from being frozen, self rescue of a locked person is affected, when the freezing sensor detects that the push rod is frozen, the heating ring is controlled to melt ice, it is guaranteed that the push rod is kept in an unfrozen state all the time, and when the push rod is not frozen, the heating ring cannot heat the push rod; the damage to the structure and the heat preservation performance of the refrigeration house due to continuous heating of the heating ring and the icing of the ground at the doorway due to the fact that a large number of water drops are formed on the base plate and flow to the ground are prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of cold storage, in particular to a cold storage door lock. Background Art

[0002] A freezer is a facility that uses various equipment to cool and can be controlled and maintained at a stable low temperature. It is mainly used for freezing and refrigerating food, medicine, machinery and other items. Through artificial refrigeration technology, the freezer can create a low-temperature environment to slow down the spoilage of items and extend their shelf life.

[0003] In order to prevent someone from being accidentally locked in a cold storage, a push rod connected to an external door lock is usually provided on the door inside the freezer. When someone is locked in the freezer, the push rod can be pushed to open the external door lock to prevent frostbite. However, if the push rod is frozen, the person cannot open the freezer door from the inside, which may put the locked person in danger. In order to solve the above problem, we propose a freezer door lock. Utility Model Content

[0004] The utility model aims to provide a freezer door lock which can prevent a door lock push rod from being frozen, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a freezer door lock, comprising a door lock body and a base plate respectively arranged on both sides of the freezer door, the side wall of the base plate being fixedly connected with a slide cylinder connected to the door lock body, the side wall of the base plate being penetrated by and slidably equipped with a push rod extending into the slide cylinder, the slide cylinder being provided with an anti-freeze assembly connected to the push rod, and one end of the push rod being connected to a separation transmission mechanism connected to the door lock body.

[0006] According to the above technical solution, the separation transmission mechanism includes an outer push rod sliding in the slide cylinder, the end of the outer push rod extends to the outside of the slide cylinder and abuts against the unlocking handle of the door lock body, and the push rod and the end of the outer push rod are arranged opposite to each other.

[0007] According to the above technical solution, the separation transmission mechanism also includes a heat-insulating piston fixedly connected to the end of the push rod.

[0008] According to the above technical solution, the heat-insulating piston is made of silicone rubber.

[0009] According to the above technical solution, the antifreeze component includes a heating ring connected to the side wall of the substrate, the heating ring is sleeved on the outer wall of the push rod, and a heat-conducting ring is connected between the heating ring and the push rod.

[0010] According to the above technical solution, the antifreeze assembly also includes an ice sensor embedded in the side wall of the push rod.

[0011] According to the above technical solution, the inner wall of the heat-conducting ring is provided with a petal-shaped groove, and the outer wall of the push rod is fixedly connected with a petal-shaped protrusion sliding in the petal-shaped groove.

[0012] According to the above technical solution, an insulating piston is fixedly connected to the end of the push rod, a limiting ring is fixedly connected inside the slide cylinder, a blocking ring is fixedly connected to the outer wall of the push rod, an elastic member is provided between the blocking ring and the limiting ring, and the limiting ring is used to control the distance of the ice sensor exposed from the substrate.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The utility model is provided with an anti-freezing component and a separation transmission mechanism to prevent the push rod from being frozen, which affects the self-rescue of the locked person. When the ice sensor detects ice on the push rod, it will control the heating ring to heat up to melt the ice, thereby ensuring that the push rod remains in an unfrozen state. When there is no ice on the push rod, the heating ring will not be heated, thereby preventing the heating ring from continuously heating to damage the structure and thermal insulation performance of the cold storage, and causing a large number of water droplets to form on the base plate and flow to the ground, resulting in ice on the ground at the door.

[0015] Under normal conditions, the elastic force of the elastic part will push the blocking ring, so that the push rod and the insulating piston at the end remain out of contact with the outer push rod, effectively isolating heat conduction. The insulating piston can also prevent the flow and escape of cold air, further preventing the push rod from freezing and affecting the self-rescue of the locked person. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a half-section diagram of the freezer door lock of the utility model;

[0017] Figure 2 It is a bottom view of the main body of the door lock of the utility model;

[0018] Figure 3 It is a cross-sectional view of the push rod and the separation transmission mechanism when the push rod is not pushed in the utility model;

[0019] Figure 4 It is a cross-sectional view of the push rod and the separation transmission mechanism after the push rod is pushed;

[0020] Figure 5 It is a top view of the main body of the door lock of the utility model;

[0021] Figure 6 It is a schematic diagram of the petal-shaped protrusion and the petal-shaped groove of the utility model.

[0022] In the figure: 1. door lock body; 11. lock body frame; 12. lock tongue; 13. unlocking handle; 141. pull block; 142. pull rod; 143. hinged plate; 2. base plate; 3. push rod; 4. slide cylinder; 51. outer push rod; 52. heat insulating piston; 53. blocking ring; 54. elastic member; 61. heating ring; 62. ice sensor; 63. limit ring; 64. heat conductive ring; 65. petal-shaped protrusion; 66. petal-shaped groove. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1-5 The utility model provides a technical solution: a freezer door lock, comprising a door lock body 1 and a base plate 2 respectively arranged on both sides of the freezer door, the door lock body 1 comprising a lock body frame 11, a lock tongue 12 and an unlocking handle 13, the unlocking handle 13 is hinged to the lock body frame 11, the lock tongue 12 penetrates the lock body frame 11 and is slidably connected thereto, under normal conditions, the lock tongue 12 protrudes out of the lock body frame 11, so that the door lock body 1 is in a locked state, so as to lock the freezer door.

[0025] A sliding cavity is provided in the lock tongue 12, and a pull block 141 is slidably connected to the inner wall of the sliding cavity. One end of the pull block 141 is fixedly connected to a pull rod 142 extending to the outside of the sliding cavity. A partition is fixedly connected to the lock body frame 11, and the pull rod 142 passes through the partition and is slidably connected thereto. The partition plays a limiting and guiding role for the pull rod 142, so that the pull rod 142 can only move laterally. The end of the pull rod 142 away from the lock tongue 12 is hinged with a hinge plate 143, and the hinge plate 143 is hinged to the unlocking handle 13. When the unlocking handle 13 is pulled, the unlocking handle 13 will drive one end of the hinge plate 143 to lift, so that the other end of the hinge plate 143 drives the pull rod 142 to move to the side away from the lock tongue 12, and then drives the pull block 141 to move along the sliding cavity, thereby driving the lock tongue 12 to move, and causing the lock tongue 12 to retract, so that the door lock body 1 is in an unlocked state.

[0026] The lock body frame 11 and the base plate 2 are respectively fixed to the freezer door by screws, and the lock body frame 11 is arranged outside the door, and the base plate 2 is arranged inside the door. The side wall of the base plate 2 is fixedly connected with a slide 4 connected to the door lock body 1. The side wall of the base plate 2 is penetrated and slidably equipped with a push rod 3 extending into the slide 4, so that the push rod 3 can slide in the slide 4. When the push rod 3 is pushed from the inside of the freezer, the door lock body 1 can be unlocked and the freezer door can be opened.

[0027] An anti-freezing assembly connected to the push rod 3 is provided in the slide cylinder 4. The anti-freezing assembly can prevent the push rod 3 from being frozen by ice on the freezer door, which would cause danger to the locked personnel. A separating transmission mechanism connected to the door lock body 1 is connected to the push rod 3. The separating transmission mechanism can prevent the push rod 3 from extending directly out of the door and conducting heat to the inside and outside of the door, causing ice to form on the push rod 3, thereby further preventing the push rod 3 from being frozen, which would cause danger to the locked personnel.

[0028] Specifically, the separation transmission mechanism 5 includes an outer push rod 51 sliding in the slide 4. When the push rod 3 is retracted into the slide 4 close to the inner end of the freezer, the push rod 3 and the outer push rod 51 are not in contact, so as to prevent heat conduction and ice formation at the push rod 3. The end of the outer push rod 51 extends to the outside of the slide 4 and abuts against the unlocking handle 13. The ends of the push rod 3 and the outer push rod 51 are arranged opposite to each other. After pushing the push rod 3, the push rod 3 can contact the outer push rod 51 and drive the outer push rod 51 to push the unlocking handle 13 to release the locking state of the freezer door.

[0029] Specifically, the separation transmission mechanism 5 also includes a heat-insulating piston 52 fixedly connected to the end of the push rod 3. The heat-insulating piston 52 is provided to prevent the flow and escape of cold air and isolate heat conduction, thereby further preventing the push rod 3 from freezing and causing danger to the locked person.

[0030] Specifically, the heat-insulating piston 52 is made of silicone rubber, which is resistant to high temperatures and has good sealing and low-temperature resistance, and is therefore very suitable for applications requiring good sealing and low-temperature resistance.

[0031] Specifically, the anti-freezing component includes a heating ring 61 connected to the side wall of the substrate 2. The heating ring 61 is fixed in the slide 4 and is in close contact with the side wall of the substrate 2. A heat-conducting ring 64 is connected between the heating ring 61 and the push rod 3 to prevent the heating ring 61 from being worn. The heat-conducting ring 64 has good thermal conductivity. The heating ring 61 can heat the side wall of the substrate 2, and the heating ring 61 heats the push rod 3 through the heat-conducting ring 64, effectively preventing the push rod 3 from being frozen and causing danger to the locked person.

[0032] Specifically, the anti-freeze component also includes an ice sensor 62 embedded in the side wall of the push rod 3. The ice sensor 62 is electrically connected to the heating ring 61. When the ice sensor 62 detects ice on the push rod 3, it will control the heating ring 61 to heat up to melt the ice. When there is no ice on the push rod 3, the heating ring 61 will not heat up, preventing the heating ring 61 from continuing to heat up, causing damage to the structure and thermal insulation performance of the cold storage, and causing a large number of water droplets to form on the base plate 2 and flow to the ground, resulting in ice on the ground at the door.

[0033] Specifically, the inner wall of the heat-conducting ring 64 is provided with a petal-shaped groove 66 , and the outer wall of the push rod 3 is fixedly connected with a petal-shaped protrusion 65 that slides in the petal-shaped groove 66 , so as to increase the heating area of ​​the push rod 3 .

[0034] Specifically, a limit ring 63 is fixed inside the slide 4, and the maximum distance of the movable track of the end of the outer push rod 51 is smaller than the distance from the limit ring 63 to the end of the slide 4 close to the door lock body 1, so that when the push rod 3 retracts the slide 4 close to the inner end of the freezer, the push rod 3 does not contact the outer push rod 51, thereby preventing heat conduction from causing ice to form on the push rod 3.

[0035] A blocking ring 53 is fixedly connected to the outer wall of the push rod 3, and an elastic member 54 is provided between the blocking ring 53 and the limiting ring 63. The elastic member 54 can be a compression spring. Under normal conditions, the elastic force of the elastic member 54 will push the blocking ring 53 to provide a force for the push rod 3 to move in the direction of the substrate 2, so that the ice sensor 62 is exposed from the substrate 2. The heat-insulating piston 52 at the end of the push rod 3 can control the distance that the ice sensor 62 is exposed from the substrate 2 under the restriction of the limiting ring 63, so as to position the ice sensor 62. In addition, through the provision of the elastic member 54, the push rod 3 and the heat-insulating piston 52 at the end can also be kept in a non-contact state with the outer push rod 51, effectively isolating heat conduction, and further preventing the push rod 3 from freezing and causing danger to the locked person.

[0036] Working principle:

[0037] When someone is locked in the freezer, the push rod 3 can be pushed from the inside of the freezer, and the heat-insulating piston 52 at the end of the push rod 3 will push the outer push rod 51 to move toward the unlocking handle 13 and push the unlocking handle 13 to release the lock on the freezer door.

[0038] When the ice sensor 62 detects ice on the push rod 3, it will control the heating ring 61 to heat up to melt the ice and ensure that the push rod 3 remains unfrozen. When there is no ice on the push rod 3, the heating ring 61 will not heat up to prevent the heating ring 61 from continuing to heat up, thereby damaging the structure and thermal insulation performance of the cold storage and causing a large number of water droplets to form on the base plate 2 and flow to the ground, resulting in ice on the ground at the door.

[0039] Under normal conditions, the elastic force of the elastic member 54 will push the blocking ring 53, providing a force for the push rod 3 to move toward the substrate 2, so that the push rod 3 and the insulating piston 52 at the end remain in a non-contact state with the outer push rod 51, effectively isolating heat conduction, and the insulating piston 52 can also prevent the flow and escape of cold air, further preventing the push rod 3 from freezing and causing danger to the locked person.

[0040] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0041] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A freezer door lock, characterized in that: The invention comprises a door lock body (1) and a base plate (2) which are arranged on both sides of the inside and outside of a freezer door, wherein the panel of the base plate (2) is fixedly connected to a slide cylinder (4) connected to the door lock body (1), and the panel of the base plate (2) is penetrated by and slidably equipped with a push rod (3) extending into the slide cylinder (4), and an antifreeze component connected to the push rod (3) is arranged in the slide cylinder (4), and a separation transmission mechanism connected to the door lock body (1) is connected to the push rod (3).

2. A freezer door lock according to claim 1, characterized in that: The separation transmission mechanism comprises an outer push rod (51) sliding in the slide cylinder (4), the end of the outer push rod (51) extending to the outside of the slide cylinder (4) and abutting against the unlocking handle of the door lock body (1), and the push rod (3) is arranged opposite to the end of the outer push rod (51).

3. A freezer door lock according to claim 2, characterized in that: The separation transmission mechanism also includes a heat-insulating piston (52) fixedly connected to the end of the push rod (3).

4. A freezer door lock according to claim 3, characterized in that: The heat-insulating piston (52) is made of silicone rubber.

5. A freezer door lock according to claim 1, characterized in that: The antifreeze component comprises a heating ring (61) connected to the side wall of the base plate (2); the heating ring (61) is sleeved on the outer wall of the push rod (3); and a heat-conducting ring (64) is connected between the heating ring (61) and the push rod (3).

6. A freezer door lock according to claim 5, characterized in that: The anti-freezing component also includes an ice sensor (62) embedded in the side wall of the push rod (3).

7. A freezer door lock according to claim 6, characterized in that: The inner wall of the heat-conducting ring (64) is provided with a petal-shaped groove (66), and the outer wall of the push rod (3) is fixedly connected with a petal-shaped protrusion (65) sliding in the petal-shaped groove (66).

8. A freezer door lock according to claim 6, characterized in that: The end of the push rod (3) is fixedly connected to a heat-insulating piston (52), the inner wall of the slide cylinder (4) is fixedly connected to a limiting ring (63), the outer wall of the push rod (3) is fixedly connected to a blocking ring (53), an elastic member (54) is provided between the blocking ring (53) and the limiting ring (63), and the limiting ring (63) is used to control the distance at which the ice sensor (62) is exposed from the substrate (2).

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