A cooling device and a cooling method for preventing a push bar from being deformed by warping

Abstract

The present application relates to cooling method technical field, especially to a kind of cooling device for preventing ice push rod warping deformation, including the first clamping block and the second clamping block for fixing the both ends of ice push rod, the fixed ice push rod can rotate around its own axis, and make the axis of the ice push rod vertical;It further includes motor, the motor is adapted to the second clamping block, and the ice push rod is driven to rotate around its axis by motor;In the device, the ice push rod is fixed by the first clamping block and the second clamping block, the axis of the fixed ice push rod is vertical, and can rotate around its own axis, the ice push rod is driven to rotate by motor, and certain centrifugal force is received at the ice push rod push tooth, and the deflection modulus that the ice push rod is subjected to is overcome by the centrifugal force, so that the ice push rod is bent, offset the deformation generated in the cooling process of ice push rod, reach equilibrium, so that the ice push rod does not occur warping phenomenon in the cooling process.

Description

Technical Field

[0001] This invention relates to the field of cooling methods, and in particular to a cooling device and method for preventing ice pusher rods from warping and deforming. Background Technology

[0002] An ice maker is a refrigeration machine that uses a refrigeration system to cool water through an evaporator to produce ice. It employs a refrigeration system with water as the carrier, and produces ice by passing the water through a device when powered on. Some ice makers are equipped with ice pushers, such as... Figure 2-3 As shown, it includes an ice pusher main shaft 11, and ice pusher teeth 12 are evenly distributed on one side of the ice pusher main shaft 11. During the operation of the ice maker, the ice pusher is driven to rotate, and the ice blocks are pushed out through the ice pusher teeth 12 on the ice pusher, making it easy to remove the ice blocks.

[0003] Because ice pushers need to operate at low temperatures for extended periods, the material used to manufacture them must possess characteristics such as safety, non-toxicity, high strength, and excellent abrasion resistance. Therefore, POM4590 is typically used. POM4590 is a linear polymer with no side chains, high density, and high crystallinity, making it an engineering plastic with excellent comprehensive properties. However, after injection molding, POM4590 products experience shrinkage of 1.2%-3.0% during cooling. Furthermore, because the ice pusher itself is asymmetrically designed, such as… Figure 3 As shown, the contraction points 13 on the ice pusher 1 are distributed along a zigzag line. During the cooling process, the ice pusher 1 is prone to warping and deformation. When the ice pusher is warped and deformed, it affects the normal use of the device. It needs to be manually bent and reshaped, which is time-consuming and laborious and affects product quality. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a cooling device and method for preventing ice pusher rod warping and deformation.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A cooling device for preventing ice pusher rod warping and deformation includes a first clamp and a second clamp for fixing the two ends of the ice pusher rod. After fixing, the ice pusher rod can rotate around its own axis, so that the axis of the ice pusher rod is vertical.

[0007] It also includes an electric motor, which is adapted to the second clamping block and drives the ice pusher to rotate around its axis.

[0008] The motor speed is controlled according to the size of the ice pusher, so that the motor drives the ice pusher to rotate at the target speed, cools the ice pusher, and ensures that the ice pusher will not warp or deform during the cooling process.

[0009] Preferably, the first clamping block can move along the length of the ice pusher.

[0010] Preferably, a cooling method for preventing ice pusher rod warping and deformation includes the following steps:

[0011] Step 1: Measure the vertical distance from the free end of the pusher tooth to the main shaft of the pusher, and record it as L; measure the radius of the main shaft of the pusher, and record it as r; measure the initial cooling temperature of the pusher, and record it as T1; measure the ambient temperature of the cooling device, and record it as T2; obtain the lowest heat deformation temperature of the pusher, and record it as T3.

[0012] Step 2: Install the ice pusher on the cooling device, drive the ice pusher to rotate by the motor, and determine the target speed of the motor according to the ice pusher speed calculation formula. Adjust the speed of the motor in the cooling device to the target speed.

[0013] Step 3: Cool the ice pusher using a cooling device, and measure the actual temperature of the ice pusher. When the actual temperature of the ice pusher is less than or equal to T3, accelerate the cooling of the ice pusher until it is cooled to room temperature.

[0014] Preferably, in step 3, to accelerate the cooling of the ice pusher, the speed of the motor 4 can be increased, or the ice pusher can be placed in cold water for water cooling.

[0015] Preferably, the formula for calculating the speed of the ice pusher is derived according to the following steps:

[0016] Step A: Based on the initial cooling temperature T1 of the ice pusher, the ambient temperature T2 of the cooling device, the density ρ, area S, volume V, specific heat capacity C of the ice pusher, and the lowest heat distortion temperature T3 of the ice pusher, record the time it takes for the temperature of the ice pusher to decrease from T1 to T3 under natural cooling conditions, calculate the volume change dv of the ice pusher per unit time, divide the ice pusher into a toothed shaft part and a smooth shaft part, where the volume change of the toothed shaft part is dv1 and the volume change of the smooth shaft part is dv2. Based on the shrinkage area S1 of the toothed shaft part, calculate the average shrinkage distance dL1 of the toothed shaft part, and based on the shrinkage area S2 of the smooth shaft part, calculate the average shrinkage distance dL2 of the smooth shaft part. At the same time, calculate the difference between dL2 and dL1, denoted as ΔL.

[0017] Step B: Change the speed of the motor to control the centrifugal force on the pusher teeth of the pusher rod. The centrifugal force overcomes the flexural modulus of the pusher rod. When the temperature of the pusher rod is still higher than T3, the pusher rod bends. The bending amount of the pusher rod per unit time is recorded as dL3. When dl3 is close to Δl, the speed of the motor at this time is determined as the target speed.

[0018] Preferably, in step B, when the rotational speed of the ice pusher is changed, the cooling rate of the ice pusher will change. At this time, a correction amount φ needs to be introduced to satisfy dL3=φΔL. Based on the corrected dL3, the rotational speed of the motor is determined as the target rotational speed.

[0019] Preferably, the motor speed is fitted to obtain the calculation formula for the target motor speed:

[0020] Where n is the rotational speed of the ice pusher, in r / s; k is a coefficient; T1, T2 and T3 are all in ℃; L is in m; and r is in m.

[0021] Preferably, the ice pusher is made of POM4590, and the value of k ranges from 125 to 320.

[0022] Preferably, the ice pusher is made of POM4590, and the value of n ranges from 1.5 to 8.

[0023] The beneficial effects of this invention are:

[0024] 1. In this device, the ice pusher is fixed by the first clamp and the second clamp. The axis of the fixed ice pusher is vertical and can rotate around its own axis. The ice pusher is driven to rotate by the motor. The pusher teeth of the ice pusher are subjected to a certain centrifugal force. When the temperature of the ice pusher is higher than the minimum heat deformation temperature of the ice pusher, the centrifugal force overcomes the flexural modulus of the ice pusher, causing the ice pusher to bend. This counteracts the deformation generated during the cooling process of the ice pusher and achieves balance, so that the ice pusher will not warp during the cooling process.

[0025] 2. In this device, the electric motor drives the ice pusher to rotate, which accelerates the air disturbance around the ice pusher and effectively improves the cooling rate of the ice pusher, facilitating its rapid cooling.

[0026] 3. By using this cooling method to obtain the parameter information of the ice pusher, and substituting it into the calculation formula, the target speed required for pushing and cooling the ice pusher can be quickly calculated, which facilitates the rapid determination of the motor speed and ensures that the quality of the ice pusher is stable and reliable after cooling. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the main structure of a cooling device for preventing ice pusher rod warping and deformation proposed in this invention;

[0028] Figure 2 This is a schematic diagram of the main structure of the ice pusher of the cooling device for preventing ice pusher warping and deformation proposed in this invention;

[0029] Figure 3This is a schematic diagram showing the distribution of contraction points in the ice pusher of a cooling device for preventing ice pusher warping and deformation proposed in this invention.

[0030] Figure 4 This invention proposes Figure 3 A partially enlarged structural diagram;

[0031] Figure 5 This is a schematic diagram of the toothed shaft and the optical shaft in a cooling device for preventing ice pusher rod warping and deformation proposed in this invention;

[0032] Figure 6 This is a schematic diagram of the structure of a cooling device for preventing ice pusher sticks from warping and deforming, as proposed in this invention. Figure 2 .

[0033] In the diagram: 1 Ice pusher, 2 First clamping block, 3 Second clamping block, 4 Motor, 5 Fixing block, 6 Fixing plate, 7 Base plate, 8 Vertical rod, 9 First mounting bracket, 10 Second mounting bracket, 11 Ice pusher spindle, 12 Ice pusher teeth, 13 Contraction point, 14 Contraction area, 15 Toothed shaft, 16 Optical shaft. Detailed Implementation

[0034] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0035] Reference Figure 1-6 A cooling device for preventing ice pusher rod warping and deformation includes a first clamping block 2 and a second clamping block 3 for fixing the two ends of the ice pusher rod 1. After fixing, the ice pusher rod 1 can rotate around its own axis, so that the axis of the ice pusher rod 1 is vertical.

[0036] It also includes an electric motor 4, which is adapted to the second clamping block 3, and drives the ice pusher 1 to rotate around its axis.

[0037] The speed of the motor 4 is controlled according to the size of the ice pusher 1, so that the motor 4 drives the ice pusher 1 to rotate at the target speed, thereby cooling the ice pusher 1 and ensuring that the ice pusher 1 will not warp or deform during the cooling process.

[0038] The first clamping block 2 can move along the length of the ice pusher 1.

[0039] In Example 1, refer to Figure 1The second clamping block 3 is fixedly installed on the vertically set fixing plate 6. The fixing plate 6 is equipped with a fixing block 5. The first clamping block 2 can slide along the fixing block 5. The fixing block 5 is provided with screws for fixing the first clamping block 2. The ice pusher 1 is fixed by the first clamping block 2 and the second clamping block 3. The lower end of the second clamping block 3 is fixedly installed with a motor 4, which drives the ice pusher 1 to rotate.

[0040] In Example 2, refer to Figure 6 The cooling device includes a base plate 7, on which corresponding vertical rods 8 are fixedly installed. A horizontal first mounting bracket 9 and a second mounting bracket 10 are installed between the vertical rods 8. The first mounting bracket 9 is used to install a first clamping block 2, and the second mounting bracket 10 is used to install a second clamping block 3 and a motor 4. The first clamping block 2 can move vertically in the first mounting bracket 9. The first clamping block 2 and the second clamping block 3 fix the ice pusher 1 in place. The motor 4 drives the ice pusher 1 to rotate. Through this device, the ice pusher 1 can be cooled in batches.

[0041] A cooling method for preventing ice pusher sticks from warping and deforming includes the following steps:

[0042] Step 1: Measure the vertical distance from the free end of the pusher tooth 12 in the pusher rod 1 to the main shaft 11 of the pusher rod, and record it as L; measure the radius of the main shaft 11 of the pusher rod 1, and record it as r; measure the initial cooling temperature of the pusher rod 1, and record it as T1; measure the ambient temperature of the cooling device, and record it as T2; obtain the minimum heat deformation temperature of the pusher rod 1, and record it as T3.

[0043] Step 2: Install the ice pusher 1 on the cooling device, drive the ice pusher 1 to rotate through the motor 4, and determine the target speed of the motor 4 according to the ice pusher speed calculation formula, and adjust the speed of the motor 4 in the cooling device to the target speed.

[0044] Step 3: Cool the ice pusher 1 using a cooling device, and measure the actual temperature of the ice pusher 1. When the actual temperature of the ice pusher 1 is less than or equal to T3, accelerate the cooling of the ice pusher 1 until the ice pusher 1 is cooled to room temperature.

[0045] In step 3, to accelerate the cooling of the ice pusher 1, the speed of the motor 4 can be increased, or the ice pusher 1 can be placed in cold water for water cooling.

[0046] The formula for calculating the speed of the ice pusher is derived according to the following steps:

[0047] Step A: Based on the initial cooling temperature T1 of the ice pusher 1, the ambient temperature T2 of the cooling device, the density ρ, area S, volume V, specific heat capacity C of the ice pusher 1, and the minimum heat distortion temperature T3 of the ice pusher 1, record the time it takes for the temperature of the ice pusher 1 to decrease from T1 to T3 under natural cooling conditions, calculate the volume change dv of the ice pusher 1 per unit time, divide the ice pusher 1 into a toothed shaft part 15 and a smooth shaft part 16, where the volume change of the toothed shaft part 15 is dv1 and the volume change of the smooth shaft part 16 is dv2. Based on the shrinkage area S1 of the toothed shaft part 15, calculate the average shrinkage distance dL1 of the toothed shaft part 15, and based on the shrinkage area S2 of the smooth shaft part 16, calculate the average shrinkage distance dL2 of the smooth shaft part 16. At the same time, calculate the difference between dL2 and dL1, and denot it as ΔL.

[0048] from Figure 4 As can be seen, the contraction zones 14 on the ice pusher 1 have different volumes in different areas. The optical axis portion 16, due to its lower thickness and heat dissipation, contracts faster than the toothed shaft portion 15. Furthermore, the contraction rate of the optical axis portion 16 on the side furthest from the pusher teeth 12 is greater than that on the side closer to the pusher teeth 12. If no intervention is performed on the ice pusher 1 during the cooling process, it will lead to… Figure 3 The increase in the degree of angle θ caused the pusher rod 1 to warp and deform.

[0049] Step B: Change the speed of motor 4 to control the centrifugal force on the pusher teeth 12 of the pusher rod 1. The centrifugal force overcomes the flexural modulus of the pusher rod 1. When the temperature of the pusher rod 1 is still higher than T3, the pusher rod 1 bends. The bending amount of the pusher rod 1 per unit time is recorded as dL3. When dl3 is close to ΔL, the speed of motor 4 at this time is determined to be the target speed.

[0050] In step B, when the rotational speed of the ice pusher 1 is changed, the cooling rate of the ice pusher 1 will change. At this time, a correction amount φ needs to be introduced to satisfy dL3=φΔL. Based on the corrected dL3, the rotational speed of the motor 4 is determined as the target rotational speed. After the ice pusher 1 is cooled, its cooling rate will be significantly accelerated. In order to ensure the accuracy of the calculation results, ΔL needs to be corrected.

[0051] By fitting the rotational speed of motor 4, the formula for calculating the target rotational speed of motor 4 is obtained:

[0052]

[0053] Where n is the rotational speed of the pusher rod 1, in r / s; k is a coefficient; T1, T2 and T3 are all in ℃; L is in m; and r is in m.

[0054] The ice pusher 1 is made of POM4590, and the value of k ranges from 125 to 320.

[0055] The ice pusher 1 is made of POM4590, and the value of n ranges from 1.5 to 8.

[0056] In this device, the ice pusher 1 is fixed by the first clamp 2 and the second clamp 3. After being fixed, the axis of the ice pusher 1 is vertical and can rotate around its own axis. The ice pusher 1 is driven to rotate by the motor 4. The ice pusher 1 is subjected to a certain centrifugal force at the pusher tooth 12. When the temperature of the ice pusher 1 is higher than the minimum heat deformation temperature of the ice pusher 1, the centrifugal force overcomes the flexural modulus of the ice pusher 1, causing the ice pusher 1 to bend. This counteracts the deformation generated during the cooling process of the ice pusher 1 and achieves balance, so that the ice pusher 1 will not warp during the cooling process.

[0057] In this device, the electric motor 4 drives the ice pusher 1 to rotate, which accelerates the air disturbance around the ice pusher 1 and can effectively improve the cooling rate of the ice pusher 1, making it easier for the ice pusher 1 to cool down quickly.

[0058] By using this cooling method, the parameter information of the ice pusher 1 can be obtained and substituted into the calculation formula to quickly calculate the target speed required for cooling the ice pusher 1. This facilitates the rapid determination of the speed of the motor 4 and ensures that the ice pusher 1 is of stable and reliable quality after cooling.

[0059] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A cooling device for preventing the warping deformation of a push ice bar, comprising a first clamp block (2) and a second clamp block (3) for fixing both ends of a push ice bar (1), characterized in that, The fixed push ice rod (1) can rotate around its own axis, and the axis of the push ice rod (1) is vertical; Further comprising an electric motor (4) matched with the second clamp block (3), the electric motor (4) drives the push ice rod (1) to rotate around its axis; The rotation speed of the electric motor (4) is controlled according to the size of the push ice rod (1), so that the electric motor (4) drives the push ice rod (1) to rotate at the target rotation speed, cools the push ice rod (1), and ensures that the push ice rod (1) will not be warped and deformed during the cooling process; The first clamp block (2) can move along the length direction of the push ice rod (1); The cooling method of the anti-push ice rod warping deformation cooling device comprises the following steps: Step 1, measure the vertical distance from the free end of the push ice rod tooth (12) in the push ice rod (1) to the push ice rod spindle (11), and record it as L; measure the radius of the push ice rod spindle (11) in the push ice rod (1), and record it as r; measure the initial cooling temperature of the push ice rod (1), and record it as T1; measure the ambient temperature of the cooling device, and record it as T2; obtain the lowest thermal deformation temperature of the push ice rod (1), and record it as T3; Step 2, install the push ice rod (1) on the cooling device, drive the push ice rod (1) to rotate through the electric motor (4), and determine the target rotation speed of the electric motor (4) according to the push ice rod rotation speed calculation formula, and adjust the rotation speed of the electric motor (4) in the cooling device to the target rotation speed; Step 3, cool the push ice rod (1) through the cooling device, and measure the actual temperature of the push ice rod (1) at the same time, when the actual temperature of the push ice rod (1) is less than or equal to T3, speed up the cooling of the push ice rod (1), until the push ice rod (1) is cooled to room temperature; In step 3, when the cooling of the push ice rod (1) is accelerated, the rotation speed of the electric motor (4) can be increased, or the push ice rod (1) can be placed in cold water for water cooling; The push ice rod rotation speed calculation formula is derived according to the following steps: Step A, according to the initial cooling temperature T1 of the push ice rod (1), the measured ambient temperature T2 of the cooling device, the density ρ, the area S, the volume V, the specific heat capacity C of the push ice rod (1), and the lowest thermal deformation temperature T3 of the push ice rod (1), record the time when the temperature of the push ice rod (1) decreases from T1 to T3 in the natural cooling state, calculate the volume change amount dv of the push ice rod (1) per unit time, divide the push ice rod (1) into tooth shaft part (15) and light shaft part (16), wherein the volume change amount of the tooth shaft part (15) is dv1, the volume change amount of the light shaft part (16) is dv2, according to the shrinkage area S1 of the tooth shaft part (15), the average shrinkage distance dL1 of the tooth shaft part (15) is calculated, according to the shrinkage area S2 of the light shaft part (16), the average shrinkage distance dL2 of the light shaft part (16) is calculated, and the difference between dL2 and dL1 is calculated, and recorded as ΔL; Step B, change the rotation speed of the motor (4) to control the centrifugal force on the pusher teeth (12) of the pusher (1), overcome the flexural modulus on the pusher (1) by the centrifugal force, make the pusher (1) bend when the temperature of the pusher (1) is still higher than T3, record the bending amount of the pusher (1) per unit time as dL3, when dl3 approaches Δl, determine the rotation speed of the motor (4) at this time as the target rotation speed.

2. A cooling device for preventing the warping deformation of a push-off pole according to claim 1, characterized in that In step B, when the rotation speed of the pusher is changed, the cooling rate of the pusher (1) will change, at this time, a correction amount φ needs to be introduced to satisfy dL3=φ ΔL, and according to the corrected dL3, the rotation speed of the motor (4) is determined as the target rotation speed.

3. The cooling device for preventing the pushing stick from warping according to claim 2, wherein Fit the rotation speed of the motor (4) to obtain a calculation formula of the target rotation speed of the motor (4).

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