Electric welding machine cooling system and control method

Abstract

The invention provides an electric welding machine cooling system and a control method. The electric welding machine cooling system comprises a cooling pipeline, an electric welding machine welding gun, a cooling device, a storage tank, a circulating pump and a control module. The welding gun of the electric welding machine is arranged on the cooling pipeline and can exchange heat with a cooling medium in the cooling pipeline; the cooling device can cool the cooling medium flowing through the cooling pipeline; the storage tank is used for storing a cooling medium; the interior of the storage tank communicates with the cooling pipeline; the circulating pump can extract the cooling medium in the storage tank and convey the cooling medium into the cooling pipeline from the inlet end of the cooling pipeline; the control module in signal connection with the circulating pump can obtain the current working lift of the circulating pump and adjust the rotating speed according to the comparison result of the working lift and the preset lift. According to the electric welding machine cooling system and the control method, lift control over the circulating pump can be achieved, and therefore the influence of too large or too small lift of the circulating pump on a welding gun of the electric welding machine when the height of the welding gun of the electric welding machine changes is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of welding, and in particular to a cooling system and a control method for an electric welding machine. Background Art

[0002] In the related art, the windings and iron core inside the electric welder will generate a lot of heat when the electric welder is working, so a welding machine cooling system matching the electric welder is required to transfer the heat inside the electric welder. The welding machine cooling system usually uses liquid cooling to dissipate heat inside the electric welder. The cooling medium in the storage tank is pumped into the cooling pipeline by a circulating pump. The cooling medium in the cooling pipeline enters the electric welder to absorb heat and then dissipates heat through the cooling device, and finally flows back to the storage tank so that it can be pumped into the cooling pipeline again by the circulating pump. When using an electric welder gun to perform welding work at different heights, the height difference between the electric welder gun and the storage tank will change. When the height of the electric welder gun rises, the lift of the circulating pump is insufficient to deliver the cooling medium in the storage tank to the electric welder. The cooling medium in the storage tank cannot cool the electric welder gun, and the electric welder gun will overheat and be damaged. When the lift of the circulating pump is sufficient to deliver the cooling medium in the storage tank to the electric welder, if the height of the electric welder gun drops, due to the excessive flow of the circulating pump, the cooling effect of the cooling medium on the electric welder gun is too strong, resulting in a poor welding effect of the electric welder gun. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a cooling system for an electric welder, which can realize the head control of a circulating pump, thereby reducing the influence of an excessively large or insufficient head of the circulating pump on the welding gun of the electric welder when the height of the welding gun of the electric welder changes.

[0004] The present invention also provides an electric welder cooling control method using the electric welder cooling system.

[0005] According to the first aspect of the present invention, the welding machine cooling system is cooled by a cooling medium, and comprises:

[0006] Cooling pipes;

[0007] An electric welding gun, which is arranged in the cooling pipeline and can perform heat exchange with the cooling medium in the cooling pipeline;

[0008] A cooling device, disposed in the cooling pipeline and capable of cooling the cooling medium flowing through the cooling pipeline;

[0009] A storage tank, used to store the cooling medium, wherein the inlet and outlet of the cooling pipeline are both connected to the interior of the storage tank;

[0010] a circulation pump capable of extracting the cooling medium in the storage tank and delivering it into the cooling pipeline from the inlet end of the cooling pipeline;

[0011] A control module, the signal of which is connected to the circulation pump, and the control module can obtain the current working head H1 of the circulation pump;

[0012] The control module is configured to reduce the rotation speed of the circulation pump when the working head H1 is higher than the preset head H2; and increase the rotation speed of the circulation pump when the working head H1 is lower than the preset head H2.

[0013] The electric welder cooling system according to the embodiment of the present invention has at least the following beneficial effects: the circulating pump transports the cooling medium in the storage tank from the inlet end of the cooling pipeline into the cooling pipeline, so that the cooling medium can exchange heat with the electric welder welding gun arranged in the cooling pipeline, thereby cooling the electric welder welding gun; the cooling medium can also release the heat absorbed after heat exchange with the electric welder welding gun at the cooling device, and return to the storage tank through the outlet end of the cooling pipeline, so that it can be transported to the cooling pipeline by the circulating pump for the next round of cooling. The control module can adjust the working head of the circulation pump according to the preset head and the working head: when the working head is higher than the preset head, the control module reduces the rotation speed of the circulation pump, thereby reducing the working head of the circulation pump, reducing the cooling effect of the cooling medium on the welding gun of the welding machine, thereby ensuring the welding effect of the welding gun of the welding machine when the height of the welding gun of the welding machine is lowered; when the working head is lower than the preset head, the control module increases the rotation speed of the circulation pump, thereby increasing the working head of the circulation pump, so that the cooling medium can be transported to a higher place, so that when the height of the welding gun of the welding machine is increased, the welding gun of the welding machine can also be cooled by the cooling medium.

[0014] According to the second aspect of the present invention, the welding machine cooling system is cooled by a cooling medium, comprising:

[0015] Cooling pipes;

[0016] An electric welding gun, which is arranged in the cooling pipeline and can perform heat exchange with the cooling medium in the cooling pipeline;

[0017] A cooling device, disposed in the cooling pipeline and capable of cooling the cooling medium flowing through the cooling pipeline;

[0018] A storage tank, used to store the cooling medium, wherein the inlet and outlet of the cooling pipeline are both connected to the interior of the storage tank;

[0019] a circulation pump capable of extracting the cooling medium in the storage tank and delivering it into the cooling pipeline from the inlet end of the cooling pipeline;

[0020] a first temperature sensor;

[0021] A control module, signal-connected to the circulation pump, the control module can obtain the current working head H1 of the circulation pump and can obtain the actual temperature T1 of the cooling medium in the cooling pipeline through the first temperature sensor;

[0022] The control module is configured to increase the speed of the circulation pump when the actual temperature T1 is higher than the preset temperature T2 and the working head H1 is higher than the preset head H2, or when the actual temperature T1 is higher than the preset temperature T2 and the working head H1 is lower than the preset head H2; and reduce the speed of the circulation pump when the actual temperature T1 is lower than the preset temperature T2 and the working head H1 is lower than the preset head H2, or when the actual temperature T1 is lower than the preset temperature T2 and the working head H1 is higher than the preset head H2.

[0023] The electric welder cooling system according to the embodiment of the present invention has at least the following beneficial effects: the circulating pump transports the cooling medium in the storage tank from the inlet end of the cooling pipeline into the cooling pipeline, so that the cooling medium can exchange heat with the electric welder welding gun arranged in the cooling pipeline, thereby cooling the electric welder welding gun; the cooling medium can also release the heat absorbed after heat exchange with the electric welder welding gun at the cooling device, and return to the storage tank through the outlet end of the cooling pipeline, so that it can be transported to the cooling pipeline by the circulating pump for the next round of cooling.

[0024] The control module can adjust the working head of the circulation pump according to the preset head, the working head, the preset temperature and the actual temperature: when the working head is higher than the preset head and the actual temperature is lower than the preset temperature, the control module reduces the rotation speed of the circulation pump, thereby reducing the working head of the circulation pump, reducing the cooling effect of the cooling medium on the welding gun of the electric welder, thereby ensuring the welding effect of the welding gun of the electric welder when the height of the welding gun of the electric welder is reduced, and at the same time, the actual temperature is close to the preset temperature, so that the cooling intensity of the welding gun of the electric welder is closer to the cooling intensity that the welding machine should be subjected to at the preset temperature; when the working head is lower than the preset head, the control module increases the rotation speed of the circulation pump, thereby increasing the working head of the circulation pump, so that the cooling medium can be transported to a higher place, so that when the height of the welding gun of the electric welder is increased, the welding gun of the electric welder can also be cooled by the cooling medium, and at the same time, the actual temperature is close to the preset temperature, so that the cooling intensity of the welding gun of the electric welder is closer to the cooling intensity that the welding machine should be subjected to at the preset temperature.

[0025] When the working lift is higher than the preset lift and the actual temperature is higher than the preset temperature, the control module increases the speed of the circulation pump, so that the working lift of the circulation pump continues to rise, and the cooling effect of the cooling medium on the welding gun of the electric welder is continuously enhanced, so as to ensure that the cooling intensity of the welding gun of the electric welder is closer to the cooling intensity that the welding gun of the electric welder should be subjected to at the preset temperature; when the working lift is lower than the preset lift and the actual temperature is lower than the preset temperature, the control module reduces the speed of the circulation pump, so that the working lift of the circulation pump continues to decrease, and the cooling effect of the cooling medium on the welding gun of the electric welder is continuously weakened, so as to ensure that the cooling intensity that the welding gun of the electric welder is subjected to is closer to the cooling intensity that the welding gun of the electric welder should be subjected to at the preset temperature. The above scheme adjusts the working lift of the circulation pump according to the preset lift, the working lift, the preset temperature and the actual temperature, so as to control the welding performance of the welding gun of the electric welder.

[0026] According to some embodiments of the present invention, the cooling medium is made of a gas-liquid phase change material, and the cooling medium changes into a gas state after flowing through the welding gun of the electric welder, and then changes into a liquid state after flowing through the cooling device.

[0027] According to some embodiments of the present invention, the welding machine cooling system further comprises a second temperature sensor and a throttling device, wherein the second temperature sensor signal is connected to the control module, and the throttling device is arranged in the cooling pipeline and used to set the opening of the circulation pump; the control module can also obtain the actual superheat K1 of the gaseous cooling medium in the cooling pipeline through the second temperature sensor;

[0028] The control module is configured to control the throttling device to increase the opening of the circulation pump when the actual superheat K1 is higher than the preset superheat K2; and to control the throttling device to reduce the opening of the circulation pump when the actual superheat K1 is lower than the preset superheat K2.

[0029] According to some embodiments of the present invention, the welding machine cooling system includes a humidity sensor and a gas pressure sensor, and the control module can obtain the external dew point temperature T4 through the humidity sensor, and can obtain the gas pressure of the gaseous cooling medium through the gas pressure sensor to obtain the saturation temperature T5 of the cooling medium under the current pressure; the control module is configured to increase the speed of the circulation pump until the saturation temperature T5 is higher than the dew point temperature T4 when the dew point temperature T4 is higher than the saturation temperature T5.

[0030] According to some embodiments of the present invention, the welding machine cooling system also includes a first temperature sensor, the control module signal is connected to the first temperature sensor, and can obtain the actual temperature T1 of the cooling medium in the cooling pipeline through the first temperature sensor; the control module is configured to increase the speed of the circulating pump to an upper limit, increase the opening of the circulating pump to an upper limit, and increase the power of the cooling device to an upper limit when the actual temperature T1 is higher than the warning temperature T3.

[0031] According to the third aspect of the present invention, the cooling system for an electric welder is implemented by using the cooling system for an electric welder described in any one of the above embodiments, and comprises the following steps:

[0032] Set the preset lift H2;

[0033] Obtain the current working head H1 of the circulating pump;

[0034] Comparing the working head H1 with the preset head H2;

[0035] The speed of the circulation pump is adjusted according to the comparison result: when the working head H1 is higher than the preset head H2, the speed of the circulation pump is reduced, or when the working head H1 is lower than the preset head H2, the speed of the circulation pump is increased, so that the working head H1 is equal to the preset head H2.

[0036] The welding machine cooling system according to the embodiment of the present invention has at least the following beneficial effects: when the working lift is higher than the preset lift, reducing the rotation speed of the circulation pump can reduce the working lift of the circulation pump, reduce the cooling effect of the cooling medium on the welding gun of the welding machine, thereby ensuring the welding effect of the welding gun of the welding machine when the height of the welding gun of the welding machine is lowered; when the working lift is lower than the preset lift, increasing the rotation speed of the circulation pump can increase the working lift of the circulation pump, so that the cooling medium can be transported to a higher place, so that when the height of the welding gun of the welding machine is increased, the welding gun of the welding machine can also be cooled by the cooling medium.

[0037] According to some embodiments of the present invention, the welding machine cooling system is cooled by a cooling medium, and the cooling medium is a gas-liquid phase change material; the welding machine cooling control method further comprises the following steps:

[0038] Set the preset superheat K2;

[0039] Obtaining an actual superheat K1 of the gaseous cooling medium in the cooling pipeline;

[0040] After the working head H1 is made equal to the preset head H2, the opening degree of the circulation pump is adjusted to make the actual superheat degree K1 equal to the preset superheat degree K2.

[0041] According to some embodiments of the present invention, when setting the preset lift H2, a lift adjustment upper limit H3 and a lift adjustment lower limit H4 are set, the lift adjustment upper limit H3 is greater than the lift adjustment lower limit H4, and the preset lift H2 is greater than the lift adjustment lower limit H4 and less than the lift adjustment upper limit H3;

[0042] In the process of adjusting the rotation speed of the circulation pump according to the comparison result, and after the working head H1 is greater than the head adjustment lower limit H4 and less than the head adjustment upper limit H3, the opening of the circulation pump is increased synchronously with the increase of the rotation speed of the circulation pump, and the opening of the circulation pump is decreased synchronously with the decrease of the rotation speed of the circulation pump.

[0043] According to some embodiments of the present invention, when setting the preset superheat K2, a superheat adjustment upper limit K3 and a superheat adjustment lower limit K4 are set, the superheat adjustment upper limit K3 is greater than the superheat adjustment lower limit K4, and the preset superheat K2 is greater than the superheat adjustment lower limit K4 and less than the superheat adjustment upper limit K3;

[0044] In the process of adjusting the opening of the circulation pump so that the actual superheat K1 is equal to the preset superheat K2, the speed and opening of the circulation pump are adjusted until the preset superheat K2 is greater than the superheat adjustment lower limit K4 and less than the superheat adjustment upper limit K3, and then the opening of the circulation pump is adjusted so that the actual superheat K1 is equal to the preset superheat K2.

[0045] According to some embodiments of the present invention, when setting the preset superheat K2, a superheat adjustment upper limit K3 and a superheat adjustment lower limit K4 are set, the superheat adjustment upper limit K3 is greater than the superheat adjustment lower limit K4, and the preset superheat K2 is greater than the superheat adjustment lower limit K4 and less than the superheat adjustment upper limit K3;

[0046] In the process of adjusting the speed of the circulation pump according to the comparison result, when the preset superheat K2 is greater than the superheat adjustment lower limit K4 and less than the superheat adjustment upper limit K3, the adjustment cycle of the opening of the circulation pump is longer than the adjustment cycle of the speed of the circulation pump.

[0047] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0049] Figure 1 It is a connection schematic diagram of a cooling system for an electric welding machine in some embodiments of the first aspect of the present invention;

[0050] Figure 2 A schematic diagram of the connection of a cooling system for an electric welding machine according to some embodiments of the second aspect of the present invention;

[0051] Figure 3 A schematic diagram of the connection of a cooling system for an electric welding machine according to some embodiments of the third aspect of the present invention;

[0052] Figure 4 The present invention is a control flow chart of a cooling system for an electric welding machine according to some embodiments of the present invention.

[0053] Reference numerals:

[0054] Cooling pipeline 100, inlet end 110, outlet end 120, welding gun inlet 210, welding gun outlet 220, cooling device 300, storage tank 400, circulation pump 500, control module 600, pump inlet pressure sensor 610, pump outlet pressure sensor 620, first temperature sensor 700, second temperature sensor 800, throttling device 900, humidity sensor 1000, gas pressure sensor 1100. DETAILED DESCRIPTION

[0055] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0056] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0057] In the description of the present invention, "several" means more than one, "many" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0058] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0059] In the description of the present invention, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0060] Please refer to Figure 1 As shown, Figure 1 The electric welder is not shown, and only a welding gun inlet 210 and a welding gun outlet 220 connected to the internal channel of the electric welder are shown. The present invention discloses a cooling system for an electric welder using a cooling medium for cooling, comprising a cooling pipeline 100, a welding gun of the electric welder, a cooling device 300, a storage tank 400, a circulating pump 500 and a control module 600; the welding gun of the electric welder is arranged in the cooling pipeline 100 and can exchange heat with the cooling medium in the cooling pipeline 100; the cooling device 300 is arranged in the cooling pipeline 100 and can cool the cooling medium flowing through the cooling pipeline 100; the storage tank 400 is used to store the cooling medium, and the inlet end 110 and the outlet end 120 of the cooling pipeline 100 are both connected to the inside of the storage tank 400; the circulating pump 500 can extract the cooling medium in the storage tank 400 and transport it from the inlet end 110 of the cooling pipeline 100 to the cooling pipeline 100.

[0061] The circulating pump 500 transports the cooling medium in the storage tank 400 from the inlet end 110 of the cooling pipeline 100 to the cooling pipeline 100, so that the cooling medium can exchange heat with the electric welder arranged in the cooling pipeline 100, thereby cooling the electric welder; the cooling medium can also release the heat absorbed after the heat exchange with the electric welder at the cooling device 300, and return to the storage tank 400 through the outlet end 120 of the cooling pipeline 100, so that it can be transported to the cooling pipeline 100 by the circulating pump 500 for the next round of cooling. In the above manner, the electric welder cooling system enables the cooling medium to circulate in the cooling pipeline 100 and continuously cool the electric welder.

[0062] The control module 600 is connected to the circulation pump 500 by signal, and the control module 600 can obtain the current working head H1 of the circulation pump 500. The control module 600 is configured to reduce the speed of the circulation pump 500 when the working head H1 is higher than the preset head H2; and increase the speed of the circulation pump 500 when the working head H1 is lower than the preset head H2.

[0063] The control module 600 configured according to the above scheme can adjust the working head H1 of the circulation pump 500 according to the preset head H2 and the working head H1.

[0064] When the working lift H1 is higher than the preset lift H2, the control module 600 reduces the rotation speed of the circulating pump 500, thereby reducing the working lift H1 of the circulating pump 500, reducing the cooling effect of the cooling medium on the welding gun of the welding machine, thereby ensuring the welding effect of the welding gun of the welding machine when the height of the welding gun of the welding machine is lowered.

[0065] When the working head H1 is lower than the preset head H2, the control module 600 increases the rotation speed of the circulating pump 500, thereby increasing the working head H1 of the circulating pump 500, so that the cooling medium can be transported to a higher place, so that the welding gun of the welding machine can also be cooled by the cooling medium when the height of the welding gun of the welding machine rises.

[0066] The above scheme adjusts the working lift H1 of the circulation pump 500 according to the preset lift H2 and the working lift H1, which can reduce the impact of excessive or insufficient lift of the circulation pump 500 on the welding gun of the welding machine when the height of the welding gun of the welding machine changes.

[0067] Please refer to Figure 2 As shown, Figure 2 The electric welder is not shown, only a welding gun inlet 210 and a welding gun outlet 220 connected to the internal channel of the electric welder are shown. The present invention also discloses an electric welder cooling system using a cooling medium for cooling, comprising a cooling pipeline 100, an electric welder welding gun, a cooling device 300, a storage tank 400, a circulating pump 500, a first temperature sensor 700 and a control module 600; the electric welder welding gun is arranged in the cooling pipeline 100 and can exchange heat with the cooling medium in the cooling pipeline 100; the cooling device 300 is arranged in the cooling pipeline 100 and can cool the cooling medium flowing through the cooling pipeline 100; the storage tank 400 is used to store the cooling medium, and the inlet end 110 and the outlet end 120 of the cooling pipeline 100 are both connected to the inside of the storage tank 400; the circulating pump 500 can extract the cooling medium in the storage tank 400 and transport it from the inlet end 110 of the cooling pipeline 100 to the cooling pipeline 100.

[0068] The circulating pump 500 transports the cooling medium in the storage tank 400 from the inlet end 110 of the cooling pipeline 100 to the cooling pipeline 100, so that the cooling medium can exchange heat with the electric welder arranged in the cooling pipeline 100, thereby cooling the electric welder; the cooling medium can also release the heat absorbed after the heat exchange with the electric welder at the cooling device 300, and return to the storage tank 400 through the outlet end 120 of the cooling pipeline 100, so that it can be transported to the cooling pipeline 100 by the circulating pump 500 for the next round of cooling. In the above manner, the electric welder cooling system enables the cooling medium to circulate in the cooling pipeline 100 and continuously cool the electric welder.

[0069] The control module 600 is connected to the circulation pump 500 and the first temperature sensor 700 by signal, and can obtain the current working head H1 of the circulation pump 500 and can obtain the actual temperature T1 of the cooling medium in the cooling pipeline 100 through the first temperature sensor 700. The control module 600 is configured to increase the speed of the circulation pump 500 when the actual temperature T1 is higher than the preset temperature T2 and the working head H1 is higher than the preset head H2; and reduce the speed of the circulation pump 500 when the actual temperature T1 is lower than the preset temperature T2 and the working head H1 is lower than the preset head H2.

[0070] The control module 600 configured according to the above scheme can adjust the working head H1 of the circulation pump 500 according to the preset head H2, the working head H1, the preset temperature T2 and the actual temperature T1.

[0071] When the working head H1 is higher than the preset head H2 and the actual temperature T1 is lower than the preset temperature T2, the control module 600 reduces the rotation speed of the circulation pump 500, thereby reducing the working head H1 of the circulation pump 500, reducing the cooling effect of the cooling medium on the welding gun of the welding machine, thereby ensuring the welding effect of the welding gun of the welding machine when the height of the welding gun of the welding machine is lowered, and at the same time making the actual temperature T1 close to the preset temperature T2, so that the cooling intensity of the welding gun of the welding machine is closer to the cooling intensity that the welding machine should be subjected to at the preset temperature T2.

[0072] When the working lift H1 is lower than the preset lift H2 and the actual temperature T1 is higher than the preset temperature T2, the control module 600 increases the rotation speed of the circulating pump 500, thereby increasing the working lift H1 of the circulating pump 500, so that the cooling medium can be transported to a higher place, so that the welding gun of the welding machine can also be cooled by the cooling medium when the height of the welding gun of the welding machine rises, and at the same time, the actual temperature T1 is close to the preset temperature T2, so that the cooling intensity received by the welding gun of the welding machine is closer to the cooling intensity that the welding machine should be received at the preset temperature T2.

[0073] When the working head H1 is higher than the preset head H2 and the actual temperature T1 is higher than the preset temperature T2, the control module 600 increases the rotation speed of the circulating pump 500, so that the working head H1 of the circulating pump 500 continues to rise, and continues to enhance the cooling effect of the cooling medium on the welding machine's welding gun, ensuring that the cooling intensity of the welding machine's welding gun is closer to the cooling intensity that the welding machine should be subjected to at the preset temperature T2.

[0074] When the working head H1 is lower than the preset head H2 and the actual temperature T1 is lower than the preset temperature T2, the control module 600 reduces the rotation speed of the circulating pump 500, so that the working head H1 of the circulating pump 500 continues to decrease, and continues to weaken the cooling effect of the cooling medium on the welding machine gun, ensuring that the cooling intensity of the welding machine gun is closer to the cooling intensity that the welding machine gun should be subjected to at the preset temperature T2.

[0075] The above scheme adjusts the working lift H1 of the circulating pump 500 according to the preset lift H2, the working lift H1, the preset temperature T2 and the actual temperature T1, which can reduce the impact of excessive or insufficient lift of the circulating pump 500 on the welding gun of the welding machine when the height of the welding gun of the welding machine changes, and at the same time, can control the welding performance of the welding gun of the welding machine as much as possible.

[0076] Regarding the specific scheme of the control module 600 adjusting the rotation speed of the circulation pump 500, as a preferred embodiment, the control module 600 can calculate the deviation percentage between the preset temperature T2 and the actual temperature T1, and can calculate the deviation percentage between the preset head H2 and the working head H1; the control module 600 is configured to, when the working head H1 is higher than the preset head H2 and the actual temperature T1 is lower than the preset temperature T2, use the temperature and the head with the larger deviation percentage as the adjustment reference to reduce the rotation speed of the circulation pump 500; when the working head H1 is lower than the preset head H2 and the actual temperature T1 is higher than the preset temperature T2, use the temperature and the head with the larger deviation percentage as the adjustment reference to increase the rotation speed of the circulation pump 500.

[0077] When the control module 600 adjusts the actual temperature T1, the prior art will use the deviation percentage between the actual temperature T1 and the preset temperature T2 as an adjustment reference to increase or decrease the rotation speed of the circulation pump 500. When the actual temperature T1 gradually approaches the preset temperature T2, the control module 600 will gradually reduce the speed at which the actual temperature T1 approaches the preset temperature T2, so as to reduce the actual error between the actual temperature T1 and the preset temperature T2 in the steady-state electric welding machine cooling system.

[0078] In the above embodiment, the rotation speed of the circulation pump 500 is increased based on the larger deviation percentage of temperature and head as the adjustment reference. When the control module 600 adjusts the actual temperature T1: if the deviation percentage of the head is larger, the control module 600 will reduce the speed at which the actual temperature T1 approaches the preset temperature T2 more slowly, thereby making the actual temperature T1 approach the preset temperature T2 more quickly, and the welding machine cooling system can respond more quickly after the staff inputs the new preset temperature T2.

[0079] It should be noted that the present invention does not limit the specific manner in which the control module 600 obtains the working head H1 of the circulation pump 500. For some examples of specific manners, please refer to Figure 2 As shown, in some embodiments, the control module 600 includes a pump inlet pressure sensor 610 and a pump outlet pressure sensor 620, wherein the pump inlet pressure sensor 610 is disposed upstream of the circulation pump 500 in the cooling pipeline 100, and the pump outlet pressure sensor 620 is disposed downstream of the circulation pump 500 in the cooling pipeline 100; the control module 600 can obtain the working head H1 of the circulation pump 500 through the detection results of the pump inlet pressure sensor 610 and the detection results of the pump outlet pressure sensor 620. Specifically, the control module 600 obtains the pressure value at the location where the pump inlet pressure sensor 610 is set through the pump inlet pressure sensor 610, and obtains the pressure value at the location where the pump outlet pressure sensor 620 is set through the pump outlet pressure sensor 620, and the control module 600 records the difference between the two pressure values ​​as the working head H1 of the circulation pump 500.

[0080] As a preferred solution to obtain the working head H1, please refer to Figure 2 As shown, Figure 1 The inlet of the circulating pump 500 and the outlet of the circulating pump 500 are not shown; in some embodiments, the circulating pump 500 has an inlet of the circulating pump 500 and an outlet of the circulating pump 500, and the cooling medium in the storage tank 400 drawn by the circulating pump 500 passes through the inlet of the circulating pump 500 and the outlet of the circulating pump 500 in sequence; the control module 600 includes a pump inlet pressure sensor 610 and a pump outlet pressure sensor 620, and the control module 600 obtains the working head H1 according to the detection results of the pump inlet pressure sensor 610 and the detection results of the pump outlet pressure sensor 620, the pump inlet pressure sensor 610 is arranged at the inlet of the circulating pump 500, and the pump outlet pressure sensor 620 is arranged at the outlet of the circulating pump 500. Setting the pump inlet pressure sensor 610 at the inlet of the circulation pump 500 and setting the pump outlet pressure sensor 620 at the outlet of the circulation pump 500 can reduce the kinetic energy lost due to the friction between the cooling medium and the cooling pipeline 100 when flowing in the cooling pipeline 100, so that the working head H1 obtained by the control module 600 is closer to the working head H1, reducing the measurement error of the working head H1.

[0081] Based on the above embodiments, corresponding improvement schemes are further introduced below.

[0082] Furthermore, in some embodiments, the cooling medium is made of a gas-liquid phase change material, and the cooling medium changes into a gas state after flowing through the welding gun of the electric welder, and then changes into a liquid state after flowing through the cooling device 300. Through the above scheme, the cooling system of the electric welder can utilize the gasification process of the coolant to absorb more heat from the internal structure of the electric welder, and can also utilize the liquefaction process of the gas to be cooled to release more heat at the cooling device 300; the temperature variation of the gas-liquid phase change material is small during the gasification and liquefaction process, so when the internal structure of the electric welder absorbs heat, the temperature difference between the internal structure of the electric welder and the welding gun of the electric welder can be further maintained, and when the heat is released at the cooling device 300, the temperature difference between the heat exchange structure of the cooling device 300 can be further maintained, thereby further ensuring the stability of heat exchange.

[0083] For further information, please refer to Figure 3 As shown, Figure 3 The electric welder is not shown, only a welding gun inlet 210 and a welding gun outlet 220 connected to the internal channel of the electric welder are shown. In some embodiments, the cooling system of the electric welder also includes a second temperature sensor 800 and a throttling device 900. The signal of the second temperature sensor 800 is connected to the control module 600. The throttling device 900 is arranged in the cooling pipeline 100 and is used to set the opening of the circulation pump 500; the control module 600 can also obtain the preset superheat K2 of the gaseous cooling medium in the cooling pipeline 100 through the second temperature sensor 800; the control module 600 is configured to control the throttling device 900 to increase the opening of the circulation pump 500 when the preset superheat K2 is higher than the preset superheat K2; and control the throttling device 900 to reduce the opening of the circulation pump 500 when the preset superheat K2 is lower than the preset superheat K2.

[0084] Controlling the preset superheat K2 to maintain the preset superheat K2 is conducive to maintaining the stability of the welding machine cooling system; and because the cooling medium is made of phase change material, the welding machine cooling system mainly uses the phase change process of the phase change material to cool the welding machine gun. Adjusting the rotation speed of the circulating pump 500 is likely to cause a large change in the flow of the cooling medium, and the actual superheat K1 is likely to fluctuate, making it difficult to reach the preset superheat K2; and adjusting the opening of the circulating pump 500 more accurately adjusts the flow of the cooling medium flowing through the welding machine gun, making the actual superheat K1 easier to adjust.

[0085] For further information, please refer to Figure 3As shown, in some embodiments, the cooling system of the electric welder includes a humidity sensor 1000 and a gas pressure sensor 1100, and the control module 600 can obtain the external dew point temperature T4 through the humidity sensor 1000, and can obtain the gas pressure of the gaseous cooling medium through the gas pressure sensor 1100 to obtain the saturation temperature T5 of the cooling medium under the current pressure; the control module 600 is configured to increase the speed of the circulating pump 500 until the saturation temperature T5 is higher than the dew point temperature T4 when the dew point temperature T4 is higher than the saturation temperature T5. Through the above scheme, increasing the speed can increase the pressure in the cooling pipeline 100, thereby increasing the saturation temperature T5 of the cooling medium, so that the ambient temperature near the welding gun of the electric welder is increased, and the external water vapor will not form dew on the surface of the welding gun of the electric welder, thereby avoiding affecting the normal use of the welding gun of the electric welder.

[0086] Further, the control module 600 is configured such that the welding machine cooling system includes a first temperature sensor 700, and when the actual temperature T1 is higher than the warning temperature T3, the speed of the circulating pump 500 is increased to the upper limit, the opening of the circulating pump 500 is increased to the upper limit, and the power of the cooling device 300 is increased to the upper limit. Through the above scheme, the circulating pump 500 and the cooling device 300 can be operated to the maximum extent, so that the cooling function of the welding machine cooling system reaches the highest, thereby maximizing the cooling of the welding machine welding gun to avoid overheating of the welding machine welding gun. Those skilled in the art can adjust the warning temperature T3 according to the actual application scenario in the welding machine cooling system.

[0087] Please refer to Figure 1-4 As shown, the present invention also discloses a cooling control method for a welding machine implemented by any of the above embodiments, comprising the following steps:

[0088] Set the preset lift H2;

[0089] Obtain the current working head H1 of the circulation pump 500;

[0090] Compare the working head H1 and the preset head H2;

[0091] The speed of the circulation pump 500 is adjusted according to the comparison result: when the working head H1 is higher than the preset head H2, the speed of the circulation pump 500 is reduced, or when the working head H1 is lower than the preset head H2, the speed of the circulation pump 500 is increased to make the working head H1 equal to the preset head H2.

[0092] When the working lift H1 is higher than the preset lift H2, reducing the rotation speed of the circulating pump 500 can reduce the working lift H1 of the circulating pump 500, reducing the cooling effect of the cooling medium on the welding gun of the welding machine, thereby ensuring the welding effect of the welding gun when the height of the welding gun is lowered; when the working lift H1 is lower than the preset lift H2, increasing the rotation speed of the circulating pump 500 can increase the working lift H1 of the circulating pump 500, so that the cooling medium can be transported to a higher place, so that the welding gun of the welding machine can also be cooled by the cooling medium when the height of the welding gun is raised.

[0093] For further information, please refer to Figure 4 As shown, in some embodiments, when the cooling system of the electric welding machine is cooled by a cooling medium, and the cooling medium is a gas-liquid phase change material, the cooling control method of the electric welding machine further includes the following steps:

[0094] Set the preset superheat K2;

[0095] Obtaining a preset superheat K2 of the gaseous cooling medium in the cooling pipeline 100;

[0096] After the working head H1 is made equal to the preset head H2, the opening degree of the circulation pump 500 is adjusted to make the preset superheat degree K2 equal to the preset superheat degree K2.

[0097] Controlling the preset superheat K2 to maintain the preset superheat K2 is beneficial to maintaining the stability of the welding machine cooling system; and since the cooling medium is made of gas-liquid phase change material, the welding machine cooling system mainly utilizes the phase change process of the phase change material to cool the welding gun of the welding machine.

[0098] Adjusting the rotation speed of the circulating pump 500 can easily cause a significant change in the flow rate of the cooling medium, and the actual superheat K1 is prone to fluctuations, making it difficult to reach the preset superheat K2, and causing a large deviation between the working head H1 and the preset head H2; and after adjusting the working head H1 of the circulating pump 500, adjusting the opening of the circulating pump 500 can more accurately adjust the flow rate of the cooling medium flowing through the welding gun of the welding machine, making the actual superheat K1 easier to adjust, while reducing the deviation between the working head H1 and the preset head H2. On the other hand, after making the actual superheat K1 equal to the preset superheat K2, the actual temperature T1 of the cooling system of the welding machine can also be made the same as the preset temperature T2.

[0099] For further information, please refer to Figure 4As shown, in some embodiments, when setting the preset head H2, the head adjustment upper limit H3 and the head adjustment lower limit H4 are set, the head adjustment upper limit H3 is greater than the head adjustment lower limit H4, and the preset head H2 is greater than the head adjustment lower limit H4 and less than the head adjustment upper limit H3; in the process of adjusting the speed of the circulation pump 500 according to the comparison result, and after the working head H1 of the circulation pump 500 is greater than the head adjustment lower limit H4 and less than the head adjustment upper limit H3, the opening of the circulation pump 500 is increased synchronously with the increase of the speed of the circulation pump 500, and the opening of the circulation pump 500 is decreased synchronously with the decrease of the speed of the circulation pump 500.

[0100] Changing the opening of the circulation pump 500 can affect the working head H1 of the circulation pump 500. Specifically, increasing the opening of the circulation pump 500 can increase the working head H1 of the circulation pump 500, and reducing the opening of the circulation pump 500 can reduce the working head H1 of the circulation pump 500. Increasing the opening of the circulation pump 500 synchronously with the increase of the speed of the circulation pump 500 and decreasing the opening of the circulation pump 500 synchronously with the decrease of the speed of the circulation pump 500 are both conducive to further accelerating the adjustment of the working head H1.

[0101] However, under actual working conditions, the opening adjustment of the circulation pump 500 has upper and lower limits, and the adjustment of the opening has little effect on the head of the circulation pump 500. In the process of adjusting the working head H1, it is easy to make the opening of the circulation pump 500 reach the upper or lower limit, and then in the subsequent superheat adjustment process, the opening of the circulation pump 500 cannot be further increased or decreased, resulting in the actual superheat K1 cannot be further adjusted. In view of the above situation, the above embodiment also sets the head adjustment upper limit H3 and the head adjustment lower limit H4 according to the preset head H2 when setting the preset head H2. In the process of adjusting the working head H1 of the circulation pump 500, the speed and opening of the circulation pump 500 are synchronously adjusted only when the working head H1 is between the head adjustment upper limit H3 and the head adjustment lower limit H4, thereby accelerating the adjustment of the working head H1 without affecting the adjustment of the superheat by changing the opening.

[0102] Based on the above solution, please refer to Figure 2 As shown, when setting the preset superheat K2, the superheat adjustment upper limit K3 and the superheat adjustment lower limit K4 are set, the superheat adjustment upper limit K3 is greater than the superheat adjustment lower limit K4, and the preset superheat K2 is greater than the superheat adjustment lower limit K4 and less than the superheat adjustment upper limit K3; in the process of adjusting the rotation speed of the circulation pump 500 according to the comparison result, when the preset superheat K2 is greater than the superheat adjustment upper limit K3 and less than the superheat adjustment lower limit K4, the adjustment period of the opening of the circulation pump 500 is made longer than the adjustment period of the rotation speed of the circulation pump 500.

[0103] In the process of adjusting the speed and opening of the circulation pump 500 in order to make the working head H1 close to the preset head H2, the actual superheat K1 will also change. When the preset superheat K2 is greater than the upper limit K3 of superheat adjustment and less than the lower limit K4 of superheat adjustment, the adjustment period of the opening of the circulation pump 500 is made longer than the adjustment period of the speed of the circulation pump 500; the above steps can reduce the change range of the opening of the circulation pump 500 during the adjustment process, and further reduce the possibility that the opening of the circulation pump 500 reaches the limit value after the working head H1 is adjusted.

[0104] For further information, please refer to Figure 2 As shown, in some embodiments, when setting the preset superheat K2, the superheat adjustment upper limit K3 and the superheat adjustment lower limit K4 are set, the superheat adjustment upper limit K3 is greater than the superheat adjustment lower limit K4, and the preset superheat K2 is greater than the superheat adjustment lower limit K4 and less than the superheat adjustment upper limit K3; in the process of adjusting the opening of the circulation pump 500 so that the preset superheat K2 is equal to the preset superheat K2, the speed and opening of the circulation pump 500 are adjusted until the preset superheat K2 is greater than the superheat adjustment upper limit K3 and less than the superheat adjustment lower limit K4, and then the opening of the circulation pump 500 is adjusted so that the preset superheat K2 is equal to the preset superheat K2.

[0105] After adjusting the working head H1, the gap between the actual superheat K1 and the preset superheat K2 may be too large, resulting in the inability to make the actual superheat K1 the same as the preset superheat K2 by only adjusting the opening of the circulating pump 500. By adjusting the speed and opening of the circulating pump 500 so that the preset superheat K2 is between the superheat adjustment upper limit K3 and the superheat adjustment lower limit K4, it can be further ensured that the actual superheat K1 is equal to the preset superheat K2 by adjusting the opening of the circulating pump 500. Those skilled in the art can set the superheat adjustment upper limit K3 and the superheat adjustment lower limit K4 according to the actual situation of the welding machine cooling system.

[0106] Without departing from the inventive concept of the present invention, please refer to Figure 4 As shown, after making the actual superheat K1 and the preset superheat K2 equal, the working head H1 of the circulating pump 500 and the preset head H2 can be compared again, and the opening and speed of the circulating pump 500 can be adjusted according to the comparison result, and then the actual superheat K1 and the preset superheat K2 can be made the same again; the above scheme can avoid the circulating pump 500 causing an unexpected deviation of the working head H1 during the process of adjusting the superheat, so that the cooling system of the welding machine remains stable.

[0107] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the purpose of the present invention. In addition, the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

Claims

1. The cooling system of the electric welding machine uses a cooling medium for cooling, and is characterized in that: include: Cooling pipes; An electric welding gun, which is arranged in the cooling pipeline and can perform heat exchange with the cooling medium in the cooling pipeline; A cooling device, disposed in the cooling pipeline and capable of cooling the cooling medium flowing through the cooling pipeline; A storage tank, used to store the cooling medium, wherein the inlet and outlet ends of the cooling pipeline are both connected to the interior of the storage tank; a circulation pump capable of extracting the cooling medium in the storage tank and delivering it into the cooling pipeline from the inlet end of the cooling pipeline; A control module, the signal of which is connected to the circulation pump, and the control module can obtain the current working head H1 of the circulation pump; The control module is configured to reduce the rotation speed of the circulation pump when the working head H1 is higher than the preset head H2; and increase the rotation speed of the circulation pump when the working head H1 is lower than the preset head H2.

2. The cooling system of the welding machine uses a cooling medium for cooling, characterized in that: include: Cooling pipes; An electric welding gun, which is arranged in the cooling pipeline and can exchange heat with the cooling medium in the cooling pipeline; A cooling device, disposed in the cooling pipeline and capable of cooling the cooling medium flowing through the cooling pipeline; A storage tank, used to store the cooling medium, wherein the inlet and outlet ends of the cooling pipeline are both connected to the interior of the storage tank; a circulation pump capable of extracting the cooling medium in the storage tank and delivering it into the cooling pipeline from the inlet end of the cooling pipeline; a first temperature sensor; A control module, signal-connected to the circulation pump and the first temperature sensor, the control module being able to obtain the current working head H1 of the circulation pump and the actual temperature T1 of the cooling medium in the cooling pipeline through the first temperature sensor; The control module is configured to increase the speed of the circulation pump when the actual temperature T1 is higher than the preset temperature T2 and the working head H1 is higher than the preset head H2, or when the actual temperature T1 is higher than the preset temperature T2 and the working head H1 is lower than the preset head H2; When the actual temperature T1 is lower than the preset temperature T2 and the working head H1 is lower than the preset head H2, or when the actual temperature T1 is lower than the preset temperature T2 and the working head H1 is higher than the preset head H2, the rotation speed of the circulation pump is reduced.

3. The welding machine cooling system according to claim 1 or 2, characterized in that: The cooling medium is made of a gas-liquid phase change material. The cooling medium changes into a gas state after flowing through the welding gun of the electric welding machine, and then changes into a liquid state after flowing through the cooling device.

4. The welding machine cooling system according to claim 3, characterized in that: The welding machine cooling system further comprises a second temperature sensor and a throttling device, wherein the second temperature sensor signal is connected to the control module, and the throttling device is arranged in the cooling pipeline and used to set the opening of the circulation pump; the control module can also obtain the actual superheat K1 of the gaseous cooling medium in the cooling pipeline through the second temperature sensor; The control module is configured to control the throttling device to increase the opening of the circulation pump when the actual superheat K1 is higher than the preset superheat K2; When the actual superheat degree K1 is lower than the preset superheat degree K2, the throttling device is controlled to reduce the opening degree of the circulation pump.

5. The welding machine cooling system according to claim 3, characterized in that: The welding machine cooling system includes a humidity sensor and a gas pressure sensor. The control module can obtain the external dew point temperature T4 through the humidity sensor, and can obtain the gas pressure of the gaseous cooling medium through the gas pressure sensor to obtain the saturation temperature T5 of the cooling medium under the current pressure; the control module is configured to increase the rotation speed of the circulation pump until the saturation temperature T5 is higher than the dew point temperature T4 when the dew point temperature T4 is higher than the saturation temperature T5.

6. The welding machine cooling system according to claim 1 or 2, characterized in that: The welding machine cooling system also includes a first temperature sensor, the control module signal is connected to the first temperature sensor, and the actual temperature T1 of the cooling medium in the cooling pipeline can be obtained through the first temperature sensor; the control module is configured to increase the speed of the circulation pump to an upper limit, increase the opening of the circulation pump to an upper limit, and increase the power of the cooling device to an upper limit when the actual temperature T1 is higher than the warning temperature T3.

7. A welding machine cooling control method, implemented by the welding machine cooling system according to any one of claims 1 to 6, characterized in that: The steps include: Set the preset lift H2; Obtain the current working head H1 of the circulating pump; Comparing the working head H1 with the preset head H2; The speed of the circulation pump is adjusted according to the comparison result: when the working head H1 is higher than the preset head H2, the speed of the circulation pump is reduced, or when the working head H1 is lower than the preset head H2, the speed of the circulation pump is increased, so that the working head H1 is equal to the preset head H2.

8. The welding machine cooling control method according to claim 7, characterized in that: The welding machine cooling system is cooled by a cooling medium, and the cooling medium is a gas-liquid phase change material; the welding machine cooling control method also includes the following steps: Set the preset superheat K2; Obtaining an actual superheat K1 of the gaseous cooling medium in the cooling pipeline; After the working head H1 is made equal to the preset head H2, the opening degree of the circulation pump is adjusted to make the actual superheat degree K1 equal to the preset superheat degree K2.

9. The welding machine cooling control method according to claim 8, characterized in that: When setting the preset lift H2, the lift adjustment upper limit H3 and the lift adjustment lower limit H4 are set, the lift adjustment upper limit H3 is greater than the lift adjustment lower limit H4, and the preset lift H2 is greater than the lift adjustment lower limit H4 and less than the lift adjustment upper limit H3; In the process of adjusting the rotation speed of the circulation pump according to the comparison result, and after the working head H1 is greater than the head adjustment lower limit H4 and less than the head adjustment upper limit H3, the opening of the circulation pump is increased synchronously with the increase of the rotation speed of the circulation pump, and the opening of the circulation pump is decreased synchronously with the decrease of the rotation speed of the circulation pump.

10. The welding machine cooling control method according to claim 8, characterized in that: When setting the preset superheat K2, the superheat adjustment upper limit K3 and the superheat adjustment lower limit K4 are set, the superheat adjustment upper limit K3 is greater than the superheat adjustment lower limit K4, and the preset superheat K2 is greater than the superheat adjustment lower limit K4 and less than the superheat adjustment upper limit K3; In the process of adjusting the opening of the circulation pump so that the actual superheat K1 is equal to the preset superheat K2, the speed and opening of the circulation pump are adjusted until the preset superheat K2 is greater than the superheat adjustment lower limit K4 and less than the superheat adjustment upper limit K3, and then the opening of the circulation pump is adjusted so that the actual superheat K1 is equal to the preset superheat K2.

11. The welding machine cooling control method according to claim 9, characterized in that: When setting the preset superheat K2, the superheat adjustment upper limit K3 and the superheat adjustment lower limit K4 are set, the superheat adjustment upper limit K3 is greater than the superheat adjustment lower limit K4, and the preset superheat K2 is greater than the superheat adjustment lower limit K4 and less than the superheat adjustment upper limit K3; In the process of adjusting the speed of the circulation pump according to the comparison result, when the preset superheat K2 is greater than the superheat adjustment lower limit K4 and less than the superheat adjustment upper limit K3, the adjustment cycle of the opening of the circulation pump is longer than the adjustment cycle of the speed of the circulation pump.

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