Heater and energy storage converter

Abstract

The present application provides a heater and an energy storage converter. The heater provided by the present application, on the one hand, sets the blower and the PTC heater side by side, which can reduce the height of the heater and improve the space utilization rate inside the converter; on the other hand, through the coordination between the bottom plate, the cover body, the first air guide plate and the second air guide plate, a closed air duct is formed inside the heater to ensure that the air is guided to the PTC heater under the action of the blower to reduce the resistance and flow loss of the air flow, so that the overall air circulation of the heater is smoother to improve the heating effect; on the third hand, part of the heat generated by the PTC heater is concentrated in the closed air duct to form a preheating space, the blower draws the wind into the preheating space, and before the wind enters the PTC heater, the wind is preheated using part of the heat in the preheating space, thereby increasing the initial temperature of the wind when passing through the PTC heater, thereby effectively improving the heating efficiency, shortening the heating time, and reducing energy consumption.

Description

Technical Field

[0001] The present application relates to the technical field of converters, and in particular to a heater and an energy storage converter. Background Art

[0002] In recent years, with the development of renewable energy and the advancement of intelligent power systems, energy storage inverters have been used more and more widely. They can not only effectively adjust the output stability of intermittent renewable energy power generation systems such as photovoltaic and wind power, but also realize grid peak regulation, frequency regulation and backup power provision, thereby improving the stability and reliability of the grid.

[0003] Energy storage converters usually contain multiple components, which can be roughly divided into three parts according to their functions: power module, control module and grid-connected module. In areas with large temperature differences between day and night, such as the Northeast and Northwest, the temperature inside the cabinet decreases at night, and the heating areas such as the power module in the cabinet form a significant temperature difference with other areas. This not only does not ensure the stable operation of each working area, but also causes each component to lose due to the large temperature difference, reducing its service life.

[0004] In order to solve the above problems, a PTC (Positive Temperature Coefficient, PTC for short) heater is generally installed inside the energy storage inverter. The existing PTC heater is generally a heater with a single heating source installed in a box, which cannot actively dissipate heat and has a poor heating effect. Summary of the invention

[0005] In view of this, the present application provides a heater and an energy storage inverter, which can improve the heating effect of the heater while achieving a small volume.

[0006] Specifically, the present application is implemented through the following technical solutions:

[0007] In a first aspect, the present application provides a heater, comprising a housing, a first air guide plate, a second air guide plate, a blower and a PTC heater; wherein:

[0008] The housing comprises a bottom plate and a cover body; an external air inlet and an external air outlet are arranged on the cover surface of the cover body; the cover body is covered on the bottom plate;

[0009] The first air guide plate is a stepped plate having a first plane and a second plane; the height of the second plane is higher than that of the first plane; the first plane is provided with an internal air inlet matching the external air inlet; the second plane is provided with an internal air outlet matching the external air outlet; the first air guide plate is provided between the bottom plate and the cover surface in a manner that the first plane and the second plane are parallel to the bottom plate, and the second plane is in contact with the cover surface of the cover body;

[0010] The second air guide plate has an inclined surface; the second air guide plate is arranged at an end of the bottom plate away from the first plane, so that the inclined surface and the bottom plate form an upward guiding structure;

[0011] The blower is arranged between the internal air inlet and the bottom plate in a manner that the air inlet is connected to the internal air inlet and the air outlet faces the inclined surface, and the PTC heater is fixed on a side of the internal air outlet facing the bottom plate;

[0012] The first air guide plate, the second air guide plate, the bottom plate and the side of the cover body form a closed air duct, and part of the heat generated by the PTC heater is concentrated in the closed air duct to form a preheating space, so that the air sucked in by the blower is preheated through the preheating space, and the preheated air flows upward toward the PTC heater and is discharged after being heated by the PTC heater.

[0013] Optionally, two side surfaces of the first plane in the length direction have first bending portions bent downward, and the side surfaces of the first plane in the width direction have second bending portions bent upward.

[0014] Optionally, the side surface of the second plane in the width direction has a third bending portion that bends downward; the third bending portion abuts against the inclined surface.

[0015] Optionally, the distance between the blower and the PTC heater in the length direction is greater than a first preset value.

[0016] Optionally, the heater further comprises a connector and a protective coil; wherein the connector is arranged at one end of the first plane close to the second plane and the side of the cover body, and a plug hole is arranged at a position on the side of the cover body directly opposite to the connector; the protective coil is arranged on the first plane; the distance between the protective coil and the connector is less than a preset value; wherein,

[0017] The connector is electrically connected to the blower and the PTC heater via a cable inserted in the protective coil; the connector is used to control the opening and closing of the blower and the PTC heater in response to an external control signal.

[0018] Optionally, the distance between the base plate and the first plane is equal to the height of the blower.

[0019] Optionally, the length of the PTC heater along the height direction of the blower is less than 60 mm, and the PTC heater is a flat heater.

[0020] Optionally, a protective net is provided on the external air inlet.

[0021] Optionally, the external air outlet is a grille-like air outlet.

[0022] A second aspect of the present application provides an energy storage inverter, which includes any of the heaters provided in the first aspect of the present application.

[0023] The heater and energy storage inverter provided by the present application, on the first aspect, arrange the blower and the PTC heater side by side, so that the height of the heater can be lowered, the floor space of the heater can be reduced, and the space utilization inside the inverter can be improved; on the second aspect, through the coordinated cooperation between the base plate, the cover body, the first air guide plate and the second air guide plate, a closed air duct can be formed inside the heater to ensure that the air can be smoothly guided to the PTC heater under the action of the blower, so as to reduce the resistance and flow loss of the air flow, so that the overall air circulation of the heater is smoother, so as to improve the heating effect; on the third aspect, part of the heat generated by the PTC heater is concentrated in the closed air duct to form a preheating space, and the wind is sucked into the preheating space by the blower, and before the wind enters the PTC heater, the wind is preheated by using part of the heat in the preheating space, which can increase the initial temperature of the wind when passing through the PTC heater, thereby effectively improving the heating efficiency, shortening the heating time, and reducing energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of a heater according to an exemplary embodiment of the present application;

[0025] Figure 2 A cross-sectional view of a heater according to an exemplary embodiment of the present application;

[0026] Figure 3 This is a schematic diagram of the internal structure of a heater shown in an exemplary embodiment of the present application.

[0027] Description of reference numerals:

[0028] 1: Shell;

[0029] 2: The first air guide plate;

[0030] 3: Second air guide plate;

[0031] 4: Blower;

[0032] 5:PTC heater;

[0033] 6: Connectors;

[0034] 7: Protective coil;

[0035] 8: Protective net;

[0036] 11: bottom plate;

[0037] 12: cover;

[0038] 121: External air inlet;

[0039] 122: External air outlet;

[0040] 123: socket;

[0041] 21: first plane;

[0042] 22: second plane;

[0043] 211: internal air inlet;

[0044] 221: internal air outlet;

[0045] 31: Incline;

[0046] 212: first bending portion;

[0047] 213: second bending portion;

[0048] 222: The third bending portion. DETAILED DESCRIPTION

[0049] Here, exemplary embodiments are described in detail, and examples thereof are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application.

[0050] The terms used in this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The singular forms of "a", "said" and "the" used in this application are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used in this article refers to and includes any or all possible combinations of one or more associated listed items.

[0051] It should be understood that although the terms first, second, third, etc. may be used in the present application to describe various information, these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

[0052] Specific embodiments are given below to introduce the technical solution of the present application in detail.

[0053] Figure 1 This is a schematic diagram of a heater according to an exemplary embodiment of the present application. Figure 2 This is a cross-sectional view of a heater according to an exemplary embodiment of the present application. Figure 1 and Figure 2 The heater provided in this embodiment includes a housing 1, a first air guide plate 2, a second air guide plate 3, a blower 4 and a PTC heater 5; wherein,

[0054] The housing 1 includes a bottom plate 11 and a cover 12; an external air inlet 121 and an external air outlet 122 are provided on the cover surface of the cover 12; the cover 12 is covered on the bottom plate 11;

[0055] The first air guide plate 2 is a stepped plate having a first plane 21 and a second plane 22; the height of the second plane 22 is higher than that of the first plane 21; the first plane 21 is provided with an internal air inlet 211 matching the external air inlet 121; the second plane 22 is provided with an internal air outlet 221 matching the external air outlet 122; the first air guide plate 2 is provided between the bottom plate 11 and the cover surface in such a manner that the first plane 21 and the second plane 22 are parallel to the bottom plate 11, and the second plane 22 is in contact with the cover surface of the cover body 12;

[0056] The second air guide plate 3 has an inclined surface 31; the second air guide plate 3 is arranged at an end of the bottom plate 11 away from the first plane 21, so that the inclined surface 31 and the bottom plate 11 form an upward guiding structure;

[0057] The blower 4 is disposed between the internal air inlet 211 and the bottom plate 11 in a manner that the air inlet is connected to the internal air inlet 211 and the air outlet faces the inclined surface 31, and the PTC heater 5 is fixed on a side of the internal air outlet 221 facing the bottom plate 11;

[0058] The first air guide plate 2, the second air guide plate 3, the bottom plate 11 and the side of the cover body 12 form a closed air duct, and part of the heat generated by the PTC heater 5 is concentrated in the closed air duct to form a preheating space, so that the wind sucked in by the blower 4 is preheated through the preheating space, and the preheated wind flows upward toward the PTC heater 5 and is discharged after being heated by the PTC heater 5.

[0059] Specifically, the housing 1 is used to provide external protection for the heater. It is a sealed structure that can prevent dust, dirt and water vapor from entering the interior of the heater, thereby significantly reducing the failure rate and extending the service life of the heater. Further, the housing is composed of a bottom plate 11 and a cover body 12. The bottom plate 11 is a plane support, and the cover body 12 is a cover-shaped object that is covered on the bottom plate 11.

[0060] Please refer to Figure 1 and Figure 2 In a possible implementation, the base plate 11 may include a support plate and an edge structure protruding vertically upward from the circumference of the support plate, the support plate is a rectangular plate, and the edge structure includes four side surfaces protruding vertically upward from the circumference of the support plate. The connection between the cover body 12 and the base plate 11 can be achieved through the four side surfaces, that is, after the cover body 12 is covered on the base plate 11, the cover body 12 and the base plate 11 are fixedly connected through the four side panels.

[0061] In addition, the cover body 12 is a cover-shaped object, which may include a cover surface and a side surface protruding vertically downward from the circumference of the cover surface. Further, the specific size of the cover body 12 matches the specific size of the bottom plate 11. For example, in the above example, when the support plate of the bottom plate 11 is a rectangular plate, the cover surface of the cover body 12 is also a rectangular plate.

[0062] Please refer to Figure 1 In a possible implementation, a mounting portion parallel to the cover surface may be provided on one end of the side surface of the cover body 12 away from the cover surface, so as to mount the heater at a specific position of the converter.

[0063] It should be noted that the fixing method of the cover body 12 and the bottom plate 11 is set according to actual needs and is not limited in this embodiment. For example, in specific implementation, the cover body 12 and the bottom plate 11 can be connected by bolts / screws, or can be connected by bonding or hinges, which is not limited in this embodiment.

[0064] In addition, the materials of the bottom plate 11 and the cover 12 are also set according to actual needs, and are not limited in this embodiment. In specific implementation, in order to ensure that the heater works stably for a long time in a high temperature and electrical environment, the housing 1 needs to have good heat resistance, corrosion resistance and mechanical strength. At this time, the bottom plate 11 and the cover 12 can be made of stainless steel, aluminum alloy, galvanized steel plate, high temperature resistant plastic, ceramic material, etc.

[0065] For further information, please refer to Figure 1 The cover surface of the cover body 12 has an external air inlet 121 and an external air outlet 122, wherein the specific shapes of the external air inlet 121 and the external air outlet 122 are set according to actual needs and are not limited in this embodiment. For example, in a possible implementation, the external air inlet 121 can be a circular air inlet that matches the air inlet of the blower 4, and the external air outlet 122 can be a rectangular air outlet that matches the PTC heater 5.

[0066] It should be noted that, in a possible implementation, a protective net 8 is provided on the external air inlet 121, so that foreign objects can be prevented from damaging the blower 4 when the blower 4 draws fresh air.

[0067] Specifically, the specific shape of the protection net 8 is set according to actual needs, and is not limited in this embodiment. For example, in one embodiment, the protection net 8 is a mesh structure composed of multiple concentric circles.

[0068] In addition, in a possible implementation, the external air outlet 122 is a grille-like air outlet.

[0069] Specifically, the specific shape of the grille-like air outlet is set according to actual needs, and is not limited in this embodiment. For example, in one possible implementation, the grille-like air outlet may be a column of through-hole arrays or a row of through-hole arrays consisting of a plurality of rectangular through-holes; for another example, in another possible implementation, the grille-like air outlet may be a through-hole matrix consisting of a plurality of through-holes.

[0070] Figure 3 This is a schematic diagram of the internal structure of a heater according to an exemplary embodiment of the present application. Figure 1 , Figure 2 and Figure 3 The first air guide plate 2 is a stepped plate having a first plane 21 and a second plane 22, wherein the height of the second plane 22 is higher than that of the first plane 21; the first plane 21 is provided with an internal air inlet 211 matching the external air inlet 121; the second plane 22 is provided with an internal air outlet 221 matching the external air outlet 122; the first air guide plate 2 is arranged between the bottom plate 11 and the cover surface in such a manner that the first plane 21 and the second plane 22 are parallel to the bottom plate 11, and the second plane 22 is in contact with the cover surface of the cover body 12.

[0071] Specifically, the first air guide plate 2 has a first plane 21 and a second plane 22, and the first plane 21 and the second plane 22 are connected by an inclined plate. It can be understood that the first air guide plate 2 can be an integrally formed plate or a plate formed by splicing three plates, which is not limited in this embodiment.

[0072] The first plane 21 and the second plane 22 may be rectangular planes, the two planes are parallel to each other, and the second plane 22 is higher than the first plane 21. In addition, an internal air inlet 211 is provided on the first plane 21, and the specific morphology of the internal air inlet 211 matches the morphology of the air inlet of the blower 4. For example, in one embodiment, it may be a circular through hole. Further, an internal air outlet 221 is provided on the second plane 22, and the specific morphology of the internal air outlet 221 matches the morphology of the PTC heater 5. For example, in one embodiment, it may be a rectangular through hole.

[0073] Please refer to Figure 2 and Figure 3 Optionally, in a possible implementation, the first plane 21 has downwardly bent first bend portions 212 on two side surfaces in the length direction, and the first plane 21 has upwardly bent second bend portions 213 on the side surfaces in the width direction.

[0074] Optionally, the side surface of the second plane 22 in the width direction has a third bending portion 222 bent downward; the third bending portion 222 abuts against the inclined surface 31 .

[0075] Specifically, the heights of the first bending portion 212 and the second bending portion 213 (along the Figure 2 The length in the up-down direction shown is the height) is set according to actual needs and is not limited in this embodiment. For example, in one possible implementation, the height of the first bending portion 212 is less than the distance between the first plane 21 and the bottom plate 11, and the height of the second bending portion 213 is equal to the height difference between the first plane 21 and the second plane 22.

[0076] Specifically, a first bending portion 212 that bends downward is provided on the two side surfaces in the length direction of the first plane 21, and a second bending portion 213 that bends upward is provided on the side surface in the width direction. By providing the bending portions in different directions, not only can the connection with the cover body 12 be achieved, but also supporting force can be provided for the first plane 21 from different angles, thereby improving the deformation resistance of the first plane 21.

[0077] In addition, the height of the third bending portion 222 is set according to actual needs, and is not limited in this embodiment. For example, in one possible implementation, the height of the third bending portion 222 is set so that the lower end of the third bending portion 222 abuts against the upper end of the inclined surface 31. For another example, in another possible implementation, the third bending portion 222 can be set so that its lower end is lower than the upper end of the inclined surface 31, and the upper end of the inclined surface 31 abuts against the inner side surface of the third bending portion 222 to achieve abutment between the two.

[0078] It should be noted that by providing a third bent portion 222 that bends downward on the side surface in the width direction of the second plane 22, and the third bent portion 222 abuts against the inclined surface 31, not only can the third bent portion 222 provide support for the second plane 22, but also the abutment between the third bent portion 222 and the inclined surface 31 can avoid the existence of a gap between the third bent portion 222 and the inclined surface 31, so as to introduce wind into the PTC heater 5 to the maximum extent, thereby improving the heating efficiency.

[0079] For details, please continue to refer to Figure 1 , Figure 2 and Figure 3 The second air guide plate 3 has an inclined surface 31; the second air guide plate 3 is arranged at one end of the bottom plate 11 away from the first plane 21, so that the inclined surface 31 and the bottom plate 11 form an upward guiding structure.

[0080] Optionally, in a possible implementation, the second air guide plate 3 may have a plane and a slope 31, and the angle between the plane and the slope is an obtuse angle. Furthermore, the plane is fixed on the base plate 11, so that the slope 31 can form an obtuse angle with the base plate 11, forming an upward guiding structure.

[0081] It should be noted that the angle between the plane and the inclined surface in the second air guide plate 3 is set according to actual needs and is not limited in this embodiment. In addition, the second air guide plate 3 can be an integrally formed plate or a plate formed by splicing two plates. This is not limited in this embodiment.

[0082] In addition, the plane of the second air guide plate 3 can be fixed to the bottom plate 11 by means of screws / bolts, bonding, welding, etc., which is not limited in this embodiment.

[0083] For further information, please refer to Figure 2 The second air guide plate 3 can be arranged at an end of the bottom plate 11 away from the first plane 21 , that is, arranged at the end of the bottom plate 11 corresponding to the second plane 22 .

[0084] It should be noted that the first air guide plate 2 and the second air guide plate 3 are usually made of materials with good mechanical strength, high temperature resistance and corrosion resistance to ensure long-term stable operation in a complex environment. Among them, the specific manufacturing materials of the first air guide plate 2 and the second air guide plate 3 are set according to actual needs, and are not limited in this embodiment. For example, in a possible implementation, the manufacturing materials of the first air guide plate 2 and the second air guide plate 3 can be metal materials, polymer materials or ceramic materials. In specific implementation, for example, in one embodiment, when the manufacturing materials of the first air guide plate 2 and the second air guide plate 3 are metal materials, aluminum alloy or stainless steel can be used to make the first air guide plate 2 and the second air guide plate 3. For another example, in another embodiment, when the manufacturing materials of the first air guide plate 2 and the second air guide plate 3 are polymer materials, the first air guide plate 2 and the second air guide plate 3 can be made of engineering plastics (such as polyamide, polycarbonate, etc.) or reinforced composite materials (such as glass fiber reinforced plastics, carbon fiber composite materials, etc.). For another example, in another possible implementation, when the first air guide plate 2 and the second air guide plate 3 are made of ceramic material, the first air guide plate 2 and the second air guide plate 3 can be made of alumina ceramic.

[0085] In addition, the materials used to make the first air guide plate 2 and the second air guide plate 3 may be the same or different, and this is not limited in the present embodiment.

[0086] Please continue to refer to Figure 1 to Figure 2 The blower 4 is arranged between the internal air inlet 211 and the base plate 11 in a manner that the air inlet is connected to the internal air inlet 211 and the air outlet faces the inclined surface 31 , and the PTC heater 5 is fixed on a side of the internal air outlet 221 facing the base plate 11 .

[0087] Please refer to Figure 2 It can be understood that the blower 4 is fixed on the bottom plate 11, the first air guide plate 2 is located above the bottom plate 11, the air inlet of the blower 4 matches and communicates with the internal air inlet 211 of the first air guide plate 2, and the internal air inlet 211 of the first air guide plate 2 matches and communicates with the external air inlet 121 on the cover. In addition, the PTC heater 5 is arranged on the side of the internal air outlet 221 of the first air guide plate 2 facing the bottom plate 11, and the internal air outlet 221 matches and communicates with the external air outlet 122. Figure 2 When the cover body 12 is placed on the bottom plate 11, the second plane 22 contacts the cover surface. Figure 2As shown, the first air guide plate 2, the second air guide plate 3, the bottom plate 11 and the side of the cover body 12 form a closed air duct. After the air enters from the external air inlet 121, it is introduced into the blower 4 through the internal air inlet 211 on the first air guide plate 2, and then enters the air duct between the first air guide plate 2 and the bottom plate 11 from the blower 4, and is introduced into the PTC heater 5 on the first air guide plate 2 for heating through the upward guiding structure formed by the second air guide plate 3 and the bottom plate 11, and then the heated hot air is discharged from the internal air outlet 221 on the first air guide plate 2 and the external air outlet 122 on the cover.

[0088] Optionally, in a possible implementation, the distance between the blower 4 and the PTC heater 5 in the length direction is greater than a first preset value.

[0089] Specifically, the first preset value is set according to actual needs and is not limited in this embodiment. It should be noted that by maintaining a certain distance between the blower 4 and the PTC heater 5, it can be ensured that the blower 4 is not affected by the PTC heater 5, and the high temperature of the PTC heater 5 is prevented from affecting the blower 4, which can increase the service life of the blower 4.

[0090] Optionally, the distance between the bottom plate 11 and the first plane 21 is equal to the height of the blower 4, that is, the distance between the bottom plate 11 and the second plane 22 is sufficient to accommodate the blower.

[0091] Optionally, the length of the PTC heater 5 along the height direction of the blower 4 is less than 60 mm, and the PTC heater 5 is a flat heater.

[0092] Specifically, by setting the distance between the base plate 11 and the first plane 21 to be equal to the height of the blower 4, and setting the length of the PTC heater 5 along the height direction of the blower 4 to be less than 60 mm, the overall thickness of the heater can be reduced, the size of the heater can be reduced, and the space utilization rate can be increased.

[0093] Please continue to refer to Figure 2 The working principle of the heater provided in this embodiment is briefly described below:

[0094] Please refer to Figure 2 , Figure 2The red arrow in the figure indicates the direction of wind flow. After the first wind guide plate 2, the second wind guide plate 3, the bottom plate 11 and the side of the cover body 12 form a closed air duct, after the blower 4 starts working, the wind is sucked in from the external air inlet 121 and enters the space between the first plane 21 and the cover surface. At this time, since the cover surface of the cover body 12 is in contact with the second plane 22, and the side of the cover body 12 is in contact with the first plane 21, the sucked wind can only enter the blower 4 through the internal air inlet 211 on the first plane 21, and is further blown out through the outlet of the blower 4. Furthermore, the outlet of the blower 4 The air outlet is toward the inclined surface of the second air guide plate 3, and the air blown out by the blower 4 is blown toward the inclined surface 31 through the closed air duct formed between the first plane 21, the second plane 22 and the side plate of the cover body 12, and is introduced into the PTC heater 5 by the upward guiding structure formed by the bottom plate 11 and the inclined surface 31. Furthermore, the PTC heater 5 is quickly heated to generate heat after being powered on, and the blown-in air is heated into hot air, and the heated hot air is blown out from the internal air outlet 221 and the external air outlet 122, so that the hot air quickly fills the energy storage inverter, thereby achieving heating of the energy storage inverter.

[0095] It should be noted that during the blowing process of the blower 4, a part of the heat can be concentrated in the closed air duct, thereby forming a preheating space in the closed air duct. In this way, the fresh air entering during blowing has been preheated in the preheating space before passing through the PTC heater 5, absorbing part of the heat, and the preheated wind further flows upward and passes through the PTC heater 5. In this way, due to the effect of preheating, the preheated air can be made to have a higher temperature when passing through the PTC heater 5, which can further improve the overall heating effect.

[0096] It should be noted that the blower 4 can also quickly take away the heat generated by the PTC heater 5 to avoid excessively high temperature near the PTC heater 5 and thus heat loss.

[0097] The heater provided in this embodiment, on the one hand, arranges the blower and the PTC heater side by side, so that the height of the heater can be reduced, the floor space of the heater can be reduced, and the space utilization rate inside the inverter can be improved; on the second hand, through the coordinated cooperation between the bottom plate, the cover body, the first air guide plate and the second air guide plate, a closed air duct can be formed inside the heater to ensure that the air can be smoothly guided to the PTC heater under the action of the blower, so as to reduce the resistance and flow loss of the air flow, so that the overall air circulation of the heater is smoother, so as to improve the heating effect; on the third hand, part of the heat generated by the PTC heater is concentrated in the closed air duct to form a preheating space, and the wind is sucked into the preheating space by the blower, and before the wind enters the PTC heater, the wind is preheated by using part of the heat in the preheating space, which can increase the initial temperature of the wind when passing through the PTC heater, thereby effectively improving the heating efficiency, shortening the heating time, and reducing energy consumption.

[0098] Optional, please continue to exhibit Figure 1 In a possible implementation, the heater further includes a connector 6 and a protective coil 7; wherein the connector 6 is disposed at one end of the first plane 21 close to the second plane 22 and the side of the cover body 12, and a plug hole 123 is disposed on the side of the cover body 12 directly opposite to the connector 6; the protective coil 7 is disposed on the first plane 21; the distance between the protective coil 7 and the connector 6 is less than a preset value; wherein,

[0099] The connector 6 is electrically connected to the blower 4 and the PTC heater 5 via a cable inserted in the protective coil 7; the connector 6 is used to control the opening and closing of the blower 4 and the PTC heater 5 in response to an external control signal.

[0100] Specifically, the protective coil 7 is used to fix and protect the cables of the PTC heater 5 and the blower 4. The cables of the PTC heater 5 and the blower 4 pass through the protective coil 7 and are electrically connected to the connector 6. The connector 6 is used to receive a control signal from the outside of the heater (energy storage inverter) to control the opening and closing of the blower 4 and the PTC heater 5.

[0101] The heater provided in this embodiment can effectively avoid accidental displacement or damage of the cable by providing a protective coil and allowing the cable to pass through the protective coil, reduce the potential safety hazards caused by cable exposure or looseness, and thus improve the safety of the entire heater. In addition, by providing the connector on the side of the first air guide plate close to the cover body and connecting it to an external power supply or control device through the connector hole, the electrical connection of the blower and the PTC heater can be conveniently controlled to flexibly control the opening and closing of the blower and the heater, thereby achieving more efficient operation management.

[0102] The present application also provides an energy storage inverter, which includes the heater provided in the first aspect of the present application.

[0103] The energy storage inverter provided by the present application includes the heater provided above, which is used to ensure constant temperature during heating, and the heater can quickly respond to the signal of the temperature sensor in the energy storage inverter cabinet, quickly generate heat after power-on, and quickly fill the energy storage inverter cabinet with heat to achieve overall temperature balance. At the same time, the wind extracted by the blower in the heater is the wind in the energy storage inverter cabinet, which can circulate and disturb the hot air at various positions in the energy storage inverter cabinet to improve the heat transfer efficiency. Furthermore, the heater is small in size and volume, which can increase the space utilization of the energy storage inverter.

[0104] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A heater, characterized in that: The heater comprises a housing, a first air guide plate, a second air guide plate, a blower and a PTC heater; wherein, The housing comprises a bottom plate and a cover body; an external air inlet and an external air outlet are arranged on the cover surface of the cover body; the cover body is covered on the bottom plate; The first air guide plate is a stepped plate having a first plane and a second plane; the height of the second plane is higher than that of the first plane; the first plane is provided with an internal air inlet matching the external air inlet; the second plane is provided with an internal air outlet matching the external air outlet; the first air guide plate is provided between the bottom plate and the cover surface in a manner that the first plane and the second plane are parallel to the bottom plate, and the second plane is in contact with the cover surface of the cover body; The second air guide plate has an inclined surface; the second air guide plate is arranged at an end of the bottom plate away from the first plane, so that the inclined surface and the bottom plate form an upward guiding structure; The blower is arranged between the internal air inlet and the bottom plate in a manner that the air inlet is connected to the internal air inlet and the air outlet faces the inclined surface, and the PTC heater is fixed on a side of the internal air outlet facing the bottom plate; The first air guide plate, the second air guide plate, the bottom plate and the side of the cover body form a closed air duct, and part of the heat generated by the PTC heater is concentrated in the closed air duct to form a preheating space, so that the air sucked in by the blower is preheated through the preheating space, and the preheated air flows upward toward the PTC heater and is discharged after being heated by the PTC heater.

2. The heater according to claim 1, characterized in that The two side surfaces of the first plane in the length direction have first bending portions that are bent downward, and the side surfaces of the first plane in the width direction have second bending portions that are bent upward.

3. The heater according to claim 1, characterized in that The side surface of the second plane in the width direction has a third bent portion bent downward; the third bent portion abuts against the inclined surface.

4. The heater according to claim 1, characterized in that The distance between the blower and the PTC heater in the length direction is greater than a first preset value.

5. The heater according to claim 1, characterized in that The heater further comprises a connector and a protective coil; wherein the connector is arranged at one end of the first plane close to the second plane and the side of the cover body, and a plug hole is arranged at a position on the side of the cover body directly opposite to the connector; the protective coil is arranged on the first plane; the distance between the protective coil and the connector is less than a preset value; wherein, The connector is electrically connected to the blower and the PTC heater via a cable inserted in the protective coil; the connector is used to control the opening and closing of the blower and the PTC heater in response to an external control signal.

6. The heater according to claim 1, characterized in that The distance between the bottom plate and the first plane is equal to the height of the blower.

7. The heater according to claim 1, characterized in that The length of the PTC heater along the height direction of the blower is less than 60 mm, and the PTC heater is a flat heater.

8. The heater according to claim 1, characterized in that A protective net is arranged on the external air inlet.

9. The heater according to claim 1, characterized in that The external air outlet is a grille-like air outlet.

10. An energy storage converter, characterized in that: The energy storage converter comprises the heater according to any one of claims 1-9.

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