Heat sink assembly and oil heater

Abstract

The present invention provides a heat sink assembly and an electric oil heater, which relate to the technical field of electric oil heaters, so as to avoid the temperature of the upper area of ​​the heat sink assembly being too high and ensure the heating performance. An oil delivery channel for conveying heat transfer oil is formed in the heat sink assembly, and the oil delivery channel includes an intermediate channel arranged from bottom to top, and the oil delivery channel also includes an expansion channel, which is connected to the intermediate channel, and the expansion channel is used to increase the amount of heat transfer oil accommodated in the intermediate channel. The intermediate channel includes an intermediate lower channel and an intermediate upper channel, and the cross-sectional area of ​​the intermediate lower channel is larger than the cross-sectional area of ​​the intermediate upper channel. The oil delivery channel also includes side channels arranged from bottom to top, and the side channels include a side lower channel and a side upper channel, and the cross-sectional area of ​​the side lower channel is larger than the cross-sectional area of ​​the side upper channel. The present invention is used to reduce the upper and lower temperature differences of the heat sink, and avoid the peripheral temperature of the upper area of ​​the heat sink assembly from drifting too fast.

Description

Technical Field

[0001] The invention relates to the technical field of electric oil heaters, in particular to a heat sink assembly and an electric oil heater. Background Art

[0002] The core component of the existing electric oil heater is the oil heater body, which is composed of a number of heat sink assemblies, electric heating tube assemblies, sealing components and heat transfer oil. Among them, the heat sink assembly is composed of two independent sheet-shaped heat sinks that are attached to each other.

[0003] The applicant has found that the prior art has at least the following technical problems:

[0004] More than one oil flow channels are arranged from bottom to top in the heat sink assembly. When the temperature of the heat transfer oil rises, it will flow upward through the oil flow channels. Since the cross-sectional area of ​​the oil flow is basically the same from bottom to top and since the temperature of the heat transfer oil in the upper part of the oil flow channels is high, the temperature uniformity of the heat sink assembly is poor during use. The peripheral temperature of the upper area of ​​the heat sink assembly rises too quickly and is likely to exceed the specified limit range, causing the hand to become hot. If other control measures are taken (such as reducing the power of the electric heating tube assembly), the heating effect of the heat sink assembly will be affected. Summary of the invention

[0005] The object of the present invention is to provide a heat sink assembly and an electric oil heater to prevent the upper area of ​​the heat sink assembly from being too high and to ensure heating performance. The preferred technical solutions among the many technical solutions provided by the present invention can produce many technical effects as described below.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] The present invention provides a heat sink assembly, in which an oil delivery channel for delivering heat transfer oil is formed, the oil delivery channel includes an intermediate channel arranged from bottom to top, and the oil delivery channel also includes an expansion channel, the expansion channel is connected to the intermediate channel, and the expansion channel is used to increase the amount of heat transfer oil accommodated in the intermediate channel.

[0008] Further, the number of the expansion channels is one; or, the number of the expansion channels is more than two, and each of the expansion channels is connected to the middle channel.

[0009] Furthermore, the expansion channels are distributed on both sides of the middle channel, and the expansion channels on the same side of the middle channel are distributed in sequence from bottom to top along the middle channel.

[0010] Furthermore, the expansion channel is in the shape of a capillary channel and one end of the expansion channel is connected to the middle channel.

[0011] Furthermore, the middle flow channel includes a middle lower flow channel and a middle upper flow channel, the middle lower flow channel is connected to the middle upper flow channel, and the cross-sectional area of ​​the middle lower flow channel is greater than the cross-sectional area of ​​the middle upper flow channel.

[0012] Further, the lower middle flow channel gradually narrows from bottom to top, and the upper middle flow channel gradually narrows from bottom to top; or, the cross-sectional areas of the lower middle flow channel are the same, and the cross-sectional areas of the upper middle flow channel are the same.

[0013] Furthermore, the oil delivery channel also includes side channels arranged from bottom to top, and the two side channels are respectively arranged on both sides of the middle channel.

[0014] Furthermore, the side flow channel includes a lower side flow channel and an upper side flow channel, the lower side flow channel is connected to the upper side flow channel, and the cross-sectional area of ​​the lower side flow channel is greater than the cross-sectional area of ​​the upper side flow channel.

[0015] Further, the lower side flow channel gradually narrows from bottom to top, and the upper side flow channel gradually narrows from bottom to top; or, the cross-sectional areas of the lower side flow channel are the same, and the cross-sectional areas of the upper side flow channel are the same.

[0016] Furthermore, on the same cross section, the cross-sectional area of ​​the middle flow channel is not less than the cross-sectional area of ​​the side flow channel.

[0017] The invention provides an electric oil radiator, comprising the heat sink assembly.

[0018] The present invention provides a heat sink assembly, in which an oil delivery channel for delivering heat transfer oil is formed, the oil delivery channel includes an intermediate channel arranged from bottom to top, and the oil delivery channel also includes an expansion channel, which is connected to the intermediate channel. The expansion channel is used to increase the amount of heat transfer oil accommodated in the intermediate channel. The heat of the intermediate channel is increased, so that the highest temperature rise point of the edge of the heat sink assembly is appropriately reduced (dispersed toward the middle of the heat sink assembly), and the heating effect is appropriately increased while meeting the requirements of the national temperature rise standard.

[0019] The preferred technical solution of the present invention can at least produce the following technical effects:

[0020] The middle channel includes a middle lower channel and a middle upper channel. The middle lower channel is connected to the middle upper channel, and the cross-sectional area of ​​the middle lower channel is larger than the cross-sectional area of ​​the middle upper channel. This is beneficial to reduce the upper and lower temperature difference of the heat sink and avoid the peripheral temperature of the upper area of ​​the heat sink assembly from rising too fast.

[0021] The side channel includes a lower side channel and an upper side channel, the lower side channel is connected to the upper side channel, and the cross-sectional area of ​​the lower side channel is larger than the cross-sectional area of ​​the upper side channel, which is beneficial to reduce the upper and lower temperature differences of the heat sink and avoid the peripheral temperature of the upper area of ​​the heat sink assembly from rising too fast. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a schematic structural diagram of an oil heater body of an electric oil heater provided in an embodiment of the present invention;

[0024] Figure 2 is a schematic front view of a heat sink assembly provided by an embodiment of the present invention;

[0025] Figure 3 is an exploded schematic diagram of a heat sink assembly provided by an embodiment of the present invention;

[0026] Figure 4 is a cross-sectional schematic diagram of a heat sink assembly provided by an embodiment of the present invention;

[0027] Figure 5 It is a time-temperature curve diagram obtained by using the electric oil heater provided by the prior art;

[0028] Figure 6 It is a time-temperature curve diagram obtained by using the electric oil heater provided by the present invention;

[0029] Figure 7 The time-temperature curve diagram is obtained by using the electric oil heater of the prior art and the electric oil heater provided by the present invention.

[0030] In the figure, 1-middle flow channel; 11-middle lower flow channel; 12-middle upper flow channel; 2-expanded flow channel; 3-side flow channel; 31-left side flow channel; 32-right side flow channel; 33-side lower flow channel; 34-side upper flow channel; 4-heat sink assembly; 41-first heat sink; 42-second heat sink; 43-upper oil bag; 44-lower oil bag. DETAILED DESCRIPTION

[0031] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0032] Embodiment 1:

[0033] The present invention provides a heat sink assembly, in which an oil delivery channel for delivering heat transfer oil is formed, the oil delivery channel includes an intermediate channel 1 arranged from bottom to top, the oil delivery channel also includes an expansion channel 2, the expansion channel 2 is connected to the intermediate channel 1, the expansion channel 2 is used to increase the amount of heat transfer oil accommodated in the intermediate channel 1, the heat of the intermediate channel 1 is increased, so that the highest temperature rise point of the edge of the heat sink assembly is appropriately reduced (dispersed toward the middle of the heat sink assembly), and the heating effect is appropriately increased while meeting the requirements of the national temperature rise standard.

[0034] The number of the expansion channel 2 is one; or, the number of the expansion channel 2 is more than two, and each expansion channel 2 is connected to the middle channel 1.

[0035] When there is one expansion channel 2, the expansion channel 2 can be arranged vertically, and adding the expansion channel 2 is equivalent to increasing the cross-sectional area of ​​the cross section of the middle channel 1. When there are more than two expansion channels 2, the expansion channels 2 can be arranged at both sides of the middle channel 1, and the expansion channels 2 on the same side of the middle channel 1 are arranged in sequence from bottom to top along the middle channel 1.

[0036] See also Figure 2 , which shows the distribution of the expansion channel 2 and the shape of the expansion channel 2, see Figure 4 The expansion channel 2 is in the shape of a capillary channel and one end of the expansion channel 2 is connected to the middle channel 1. The heat of the middle channel 1 increases, so that the highest point of the edge temperature rise of the heat sink assembly is appropriately reduced (dispersed toward the middle of the heat sink assembly), and the heating effect is appropriately increased while meeting the requirements of the national temperature rise standard.

[0037] The oil delivery channel also includes side channels 3 arranged from bottom to top, and the two side channels 3 are respectively arranged on both sides of the middle channel 1. On the same cross section, the cross-sectional area of ​​the middle channel 1 is not less than the cross-sectional area of ​​the side channels 3. The middle channel 1 is provided with an expansion channel 2. In the process of heat transfer from bottom to top, the heat is mostly concentrated in the middle channel 1 and the expansion channel 2, while the heat of the left and right side channels 3 is less than the heat of the middle oil channel, so that the highest point of the temperature rise at the edge of the heat sink assembly is appropriately reduced (dispersed toward the middle of the heat sink assembly).

[0038] Embodiment 2:

[0039] The difference from Example 1 is:

[0040] The middle flow channel 1 includes a middle lower flow channel 11 and a middle upper flow channel 12 . The middle lower flow channel 11 is connected to the middle upper flow channel 12 . The cross-sectional area of ​​the middle lower flow channel 11 is greater than that of the middle upper flow channel 12 .

[0041] The existing heat sink assembly has a poor temperature uniformity during use because the cross-sectional area of ​​the oil flow from bottom to top is basically the same, and because the temperature of the heat transfer oil in the upper part of the oil flow channel is high, the peripheral temperature of the upper area of ​​the heat sink assembly rises too quickly, easily exceeding the specified limit range, and easily scalding. If other control measures are taken (such as reducing the power of the electric heating tube assembly), the heating effect of the heat sink assembly will be affected. Based on this, the cross-sectional area of ​​the middle lower flow channel 11 is set to be larger than the cross-sectional area of ​​the middle upper flow channel 12, and the volume of the middle upper flow channel 12 is reduced, which is conducive to reducing the upper and lower temperature difference of the heat sink and avoiding the peripheral temperature of the upper area of ​​the heat sink assembly from rising too quickly.

[0042] Preferably, the middle lower flow channel 11 gradually narrows from bottom to top, and the middle upper flow channel 12 gradually narrows from bottom to top. Of course, it can also be arranged as follows: on the premise that the cross-sectional area of ​​the middle lower flow channel 11 is greater than the cross-sectional area of ​​the middle upper flow channel 12, the cross-sectional areas of the middle lower flow channel 11 are the same at all locations; and the cross-sectional areas of the middle upper flow channel 12 are the same at all locations.

[0043] See also Figure 2 , indicating that the cross-sectional areas of the middle lower flow channel 11 are the same at all locations, the cross-sectional areas of the middle upper flow channel 12 are the same at all locations, and there is an intermediate transition flow channel between the middle lower flow channel 11 and the middle upper flow channel 12, and the intermediate transition flow channel gradually narrows from bottom to top.

[0044] The oil delivery channel also includes a side channel 3 arranged from bottom to top, and the two side channels 3 are respectively arranged on both sides of the middle channel 1. Preferably, the side channel 3 includes a lower side channel 33 and an upper side channel 34, the lower side channel 33 is connected to the upper side channel 34, and the cross-sectional area of ​​the lower side channel 33 is greater than the cross-sectional area of ​​the upper side channel 34. The cross-sectional area of ​​the lower side channel 33 is set to be greater than the cross-sectional area of ​​the upper side channel 34, and the volume of the upper side channel 34 is reduced, which is conducive to reducing the upper and lower temperature difference of the heat sink and preventing the peripheral temperature of the upper area of ​​the heat sink assembly from drifting too fast.

[0045] Preferably, the lower side channel 33 gradually narrows from bottom to top, and the upper side channel 34 gradually narrows from bottom to top. Of course, it can also be arranged as follows: on the premise that the cross-sectional area of ​​the lower side channel 33 is greater than the cross-sectional area of ​​the upper side channel 34, the cross-sectional areas of the lower side channel 33 are the same at all locations; and the cross-sectional areas of the upper side channel 34 are the same at all locations.

[0046] See also Figure 2 , illustrating that the cross-sectional areas of the lower side flow channel 33 are the same at all locations, the cross-sectional areas of the upper side flow channel 34 are the same at all locations, and there is an intermediate transition flow channel between the lower side flow channel 33 and the upper side flow channel 34, and the intermediate transition flow channel gradually narrows from bottom to top.

[0047] See the figure below Figure 5-Figure 7 , is a heat sink assembly provided by the present invention (see Figure 1-Figure 4 ) and the oil heater in the prior art (the existing heat sink assembly, the cross-sectional area of ​​oil flow from bottom to top is basically the same):

[0048] See also Figure 5 , which is the temperature-time curve obtained from the operation of the existing electric oil heater. Figure 5 In the figure, the bottom curve is the ambient temperature curve, the middle curve is the measured temperature curve of the edge of the oil heater body, and the upper curve is the displayed temperature curve of the thermostat. When the temperature of the edge of the oil heater body is greater than a certain temperature (about 96.7°C), the gear of the thermostat is reduced to a low gear, and the temperature of the edge of the oil heater body gradually decreases. When it decreases to a certain temperature, the gear of the thermostat is increased to a high gear, and the temperature of the edge of the oil heater body gradually increases. In the working process of the existing electric oil heater, the gear of the thermostat is repeatedly adjusted to prevent the temperature of the edge of the oil heater body from being too high.

[0049] See also Figure 6 , is a temperature-time curve obtained by operating the oil heater using the heat sink assembly provided by the present invention. Figure 6 In the figure, the bottom curve is the ambient temperature, the middle curve is the displayed temperature of the thermostat, and the upper curve is the measured temperature of the edge of the oil-filled heater body. When the thermostat reaches the preset temperature level, the level of the thermostat does not need to be adjusted during the experimental time period. The temperature of the edge of the oil-filled heater body and the temperature displayed by the thermostat are relatively stable.

[0050] See also Figure 7 The lower curve is the temperature curve obtained when the existing electric oil heater is working, and the upper curve is the temperature curve obtained when the electric oil heater provided by the present invention is working. Under the same time, the electric oil heater provided by the present invention makes the ambient temperature rise faster when working.

[0051] Embodiment 3:

[0052] An electric oil heater includes the heat sink assembly 4 provided by the present invention. The electric oil heater includes an oil heater body, a front shell assembly, a rear shell assembly, a stand assembly, etc. The oil heater body is composed of a plurality of heat sink assemblies, electric heating pipes, heat transfer oil, seals, etc. The heat sink assembly is composed of two independent heat sinks (a first heat sink 41 and a second heat sink 42) that are bonded together. Two adjacent heat sink assemblies are connected by an upper oil bag 43 and a lower oil bag 44, so that the oil channels in each heat sink assembly are interconnected. The connecting channel of the lower oil bag 44 of the heat sink assembly is provided with an electric heating pipe, and heat is transferred to the heat transfer oil after power is turned on. An oil flow channel from bottom to top is provided in the heat sink assembly. When the temperature of the heat transfer oil rises, it will flow upward through the oil flow channel.

[0053] An oil delivery channel for conveying thermal oil is formed in the heat sink assembly, and the oil delivery channel includes an intermediate channel 1 arranged from bottom to top, and the oil delivery channel also includes an expansion channel 2. The expansion channel 2 is connected to the intermediate channel 1, and the expansion channel 2 is used to increase the amount of thermal oil accommodated in the intermediate channel 1. The heat of the intermediate channel 1 increases, so that the highest temperature rise point of the edge of the heat sink assembly is appropriately reduced (dispersed toward the middle of the heat sink assembly). While meeting the requirements of the national temperature rise standard, the heating effect is appropriately increased.

[0054] The middle flow channel 1 includes a middle lower flow channel 11 and a middle upper flow channel 12. The middle lower flow channel 11 is connected to the middle upper flow channel 12, and the cross-sectional area of ​​the middle lower flow channel 11 is larger than the cross-sectional area of ​​the middle upper flow channel 12. This is beneficial to reduce the upper and lower temperature difference of the heat sink and prevent the peripheral temperature of the upper area of ​​the heat sink assembly from rising too fast.

[0055] The oil delivery channel also includes side channels 3 arranged from bottom to top, and the two side channels 3 are respectively arranged on both sides of the middle channel 1. The side channels 3 include a lower side channel 33 and an upper side channel 34, the lower side channel 33 is connected to the upper side channel 34, and the cross-sectional area of ​​the lower side channel 33 is larger than the cross-sectional area of ​​the upper side channel 34. This is beneficial to reduce the upper and lower temperature differences of the heat sink and prevent the peripheral temperature of the upper area of ​​the heat sink assembly from rising too fast.

[0056] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A heat sink assembly, wherein an oil delivery channel for delivering heat transfer oil is formed in the heat sink assembly, wherein the oil delivery channel comprises an intermediate channel (1) arranged from bottom to top, characterized in that: The oil delivery channel further comprises an expansion channel (2), wherein the expansion channel (2) is connected to the intermediate channel (1), and the expansion channel (2) is used to increase the amount of the heat transfer oil accommodated in the intermediate channel (1); The expansion channel (2) is in the shape of a capillary channel and one end of the expansion channel (2) is connected to the middle channel (1); The oil delivery channel also includes side channels (3) arranged from bottom to top. On the same cross-section, the cross-sectional area of ​​the middle channel (1) is not less than the cross-sectional area of ​​the side channels (3). In the process of heat transfer from bottom to top, the heat is mostly concentrated in the middle channel (1) and the expansion channel (2), and the heat of the side channel (3) is less than the heat of the middle channel (1).

2. The heat sink assembly according to claim 1, characterized in that: The number of the expansion channel (2) is one; or, the number of the expansion channel (2) is more than two, and each of the expansion channel (2) is connected to the intermediate channel (1).

3. The heat sink assembly according to claim 2, characterized in that: The expansion channels (2) are distributed on both sides of the middle channel (1), and the expansion channels (2) on the same side of the middle channel (1) are distributed in sequence along the middle channel (1) from bottom to top.

4. The heat sink assembly according to claim 1, characterized in that: The intermediate flow channel (1) comprises an intermediate lower flow channel (11) and an intermediate upper flow channel (12); the intermediate lower flow channel (11) is connected to the intermediate upper flow channel (12); and the cross-sectional area of ​​the intermediate lower flow channel (11) is greater than the cross-sectional area of ​​the intermediate upper flow channel (12).

5. The heat sink assembly according to claim 4, characterized in that: The lower middle flow channel (11) gradually narrows from bottom to top, and the upper middle flow channel (12) gradually narrows from bottom to top; or, the cross-sectional areas of the lower middle flow channel (11) are the same, and the cross-sectional areas of the upper middle flow channel (12) are the same.

6. The heat sink assembly according to any one of claims 1 to 5, characterized in that: The two side flow channels (3) are respectively arranged on both sides of the middle flow channel (1).

7. The heat sink assembly according to claim 6, characterized in that: The side flow channel (3) comprises a lower side flow channel (33) and an upper side flow channel (34); the lower side flow channel (33) is connected to the upper side flow channel (34); and the cross-sectional area of ​​the lower side flow channel (33) is greater than the cross-sectional area of ​​the upper side flow channel (34).

8. The heat sink assembly according to claim 7, characterized in that: The lower side flow channel (33) gradually narrows from bottom to top, and the upper side flow channel (34) gradually narrows from bottom to top; or, the cross-sectional areas of the lower side flow channel (33) are the same, and the cross-sectional areas of the upper side flow channel (34) are the same.

9. An electric oil heater, characterized in that: It comprises the heat sink assembly (4) as claimed in any one of claims 1 to 8.

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