PTC heater assembly and air conditioning system

Abstract

The utility model relates to the technical field of air conditioners, and discloses a PTC heater assembly and an air conditioning system.The PTC heater assembly comprises a shell, a heating cell, a thermal protector and a low-voltage connecting piece, and the shell is provided with a containing cavity; the heating cell is arranged in the accommodating cavity, and the heating cell is provided with a first end and a second end which are oppositely arranged along a first direction; the thermal protector is arranged at the first end and is connected with the heating cell; the low-voltage connecting piece comprises a low-voltage connecting line and a low-voltage plug connector, one end of the low-voltage connecting line is connected with the thermal protector, and the other end of the low-voltage connecting line is connected with the low-voltage plug connector; wherein the shell is provided with a first limiting hole, and the low-voltage plug connector is inserted into the first limiting hole in a matched mode, so that the low-voltage plug connector is fixed to the shell. The technical problem that under the condition that vibration of a whole vehicle is large, a low-voltage plug connector and an air pipe are prone to colliding, and abnormal sound is generated is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioners, in particular to a PTC heater assembly and an air conditioning system. BACKGROUND

[0002] With the popularity of new energy electric vehicles and hybrid electric vehicles, the battery and electric drive system needs to be preheated in cold environments to ensure performance and service life, and the PTC heater assembly can provide efficient heating and constant temperature control. The PTC heater assembly is a sub-assembly of the air conditioning system, which is combined with the air conditioning box to form a large assembly. The circuit is connected through the low-voltage line and the high-voltage line to ensure the function operation. The PTC heater assembly is connected with the low-voltage wire harness assembly through the low-voltage connector. However, since the low-voltage connector is arranged near the air conditioning box air pipe, in the case of large vehicle vibration, the low-voltage connector and the air pipe are easy to collide and produce abnormal noise. CONTENT OF THE UTILITY MODEL

[0003] The present application provides a PTC heater assembly and an air conditioning system, which solves the technical problem that the low-voltage connector and the air pipe are easy to collide and produce abnormal noise in the case of large vehicle vibration.

[0004] In order to achieve the above purpose, the main technical scheme adopted by the present application includes:

[0005] In a first aspect, the present application provides a PTC heater assembly, which comprises a shell, a heating cell, a thermal protector and a low-voltage connector. The shell has a receiving cavity. The heating cell is arranged in the receiving cavity and has a first end and a second end arranged oppositely along a first direction. The thermal protector is arranged at the first end and connected with the heating cell. The low-voltage connector comprises a low-voltage connecting line and a low-voltage connector. One end of the low-voltage connecting line is connected with the thermal protector, and the other end of the low-voltage connecting line is connected with the low-voltage connector. The shell has a first limiting hole, and the low-voltage connector is inserted and matched in the first limiting hole, so that the low-voltage connector is fixed to the shell.

[0006] The PTC heater assembly provided in the present application has the low-voltage connector inserted and matched in the first limiting hole, so that the low-voltage connector is fixed to the shell. In this way, the probability of collision between the low-voltage connector and other parts of the air conditioning system is reduced, the probability of abnormal noise of the low-voltage connector is reduced, and the use comfort of the driver is improved.

[0007] Optionally, the shell comprises a first wall and a second wall, and the first wall and the second wall are arranged oppositely along a second direction perpendicular to the first direction. The first wall is provided with the first limiting hole. The low-voltage connector comprises a first segment and a second segment, and the outer diameter of the second segment is greater than that of the first segment. The second segment is arranged on the outside of the shell, and the first segment is inserted and matched with the first limiting hole.

[0008] The outer diameter of the second section is larger than that of the first section, and the second section is arranged on the outer side of the shell. On the one hand, the low-voltage plug connector can be fixed and positioned on the shell, reducing the probability of the low-voltage plug connector from shaking and colliding to generate abnormal sound. On the other hand, it is also convenient for assembly personnel to assemble, reduces the assembly difficulty, and improves the assembly efficiency.

[0009] Optionally, the PTC heater assembly further comprises a partition plate arranged in the shell to divide the containing cavity into a first containing cavity and a second containing cavity, and the heating electric core is arranged in the first containing cavity; the PTC heater assembly further comprises a bus plate and a high-voltage connecting line, the bus plate is connected with the heating electric core, the high-voltage connecting line is connected to the bus plate and extends out of the shell, and the bus plate and the high-voltage connecting line are arranged in the second containing cavity.

[0010] The partition plate arranges the bus plate and the high-voltage connecting line in the second containing cavity, and the PTC heater assembly is arranged in the first containing cavity, thereby reducing the mutual influence between the parts, and enabling the internal parts of the PTC heater assembly to operate more stably and reliably.

[0011] Optionally, the bus plate comprises a positive bus plate and a negative bus plate, and the PTC heater assembly further comprises a high-voltage wire harness, the high-voltage wire harness comprising a positive high-voltage wire harness and a negative high-voltage wire harness; the positive bus plate comprises a positive terminal, the negative bus plate comprises a negative terminal, the positive high-voltage wire harness is connected to the positive terminal, and the negative high-voltage wire harness is connected to the negative terminal.

[0012] The arrangement of the positive bus plate and the negative bus plate, in cooperation with the positive high-voltage wire harness and the negative high-voltage wire harness, realizes accurate control and transmission of the current. The positive terminal and the negative terminal are respectively connected to the corresponding positive high-voltage wire harness and negative high-voltage wire harness, ensuring that the current can accurately flow into and out of the heating electric core, and further improving the stability and efficiency of the heating of the heating electric core.

[0013] Optionally, along the second direction, the heating electric core has a third end and a fourth end arranged oppositely, the bus plate and the low-voltage plug connector are located on the side of the third end away from the fourth end, and the first direction is perpendicular to the second direction.

[0014] The bus plate and the low-voltage plug connector are both located on the side of the third end of the heating electric core away from the fourth end, so that the bus plate and the low-voltage plug connector are located on the same side, facilitating the assembly of the heater assembly and being beneficial to the daily maintenance of the heater assembly.

[0015] Optionally, a layer of potting material is arranged in the second containing cavity to fix the low-voltage connecting line, the bus plate and the high-voltage connecting line.

[0016] Since the PTC heater assembly can generate condensate water in the process of cooperating with the air conditioning system to refrigerate or heat, the potting material in the second accommodating cavity can prevent the condensate water from flowing out of the first limiting hole, and effectively prevent the condensate water in the air conditioning box from dripping from the low-voltage connector.

[0017] Optionally, the shell comprises a first shell and a second shell, the first shell and the second shell are oppositely arranged along a third direction, and the second shell is detachably arranged on the first shell.

[0018] The second shell is detachably arranged on the first shell, which can improve the production efficiency of the heater assembly and facilitate the maintenance and repair of the heater assembly.

[0019] Optionally, the PTC heater assembly further comprises two first mounting portions, which are spaced apart at two ends of the first shell along the first direction.

[0020] The two first mounting portions are spaced apart at two ends of the first shell along the first direction, which can make the PTC heater assembly more firmly fixed at the corresponding position, and make the stress of the PTC heating assembly more uniform, thereby improving the stability and reliability of the structure of the heater assembly.

[0021] Optionally, the PTC heater assembly further comprises a grounding wire and a grounding terminal, the grounding terminal is arranged at the second end, and the grounding terminal is connected with the grounding wire.

[0022] The grounding wire and the grounding terminal arranged on the PTC heater assembly can improve the stability and safety of the PTC heater.

[0023] In a second aspect, the embodiments of the present application also provide an air conditioning system, which comprises the PTC heater assembly of any one of the embodiments of the present application.

[0024] The low-voltage connector is plugged into the first limiting hole to fix the low-voltage connector to the shell, which can reduce the probability of collision between the low-voltage connector and other parts of the air conditioning system, reduce the probability of abnormal sound of the low-voltage connector, and improve the use comfort of the driver. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the description of the specific embodiments or the prior art. Obviously, the drawings described below are some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creative labor.

[0026] Figure 1 A structural schematic diagram of a PTC heater assembly provided for an embodiment of the present application;

[0027] Figure 2 A structural schematic diagram of a PTC heater assembly provided for an embodiment of the present application and without a second shell;

[0028] Figure 3 The structure and position of the first limiting hole are shown;

[0029] Figure 4 The structure and position of the low-voltage plug-in part are shown;

[0030] Figure 5 A structural schematic diagram of an air conditioning system provided for an embodiment of the present application.

[0031]

Explanation of reference numerals

[0032] Heater assembly 100;

[0033] Shell 110; first wall 111; second wall 112; first shell 113; second shell 114;

[0034] Heating electric core 120; first end 121; second end 122; third end 123; fourth end 124;

[0035] Thermal protector 130;

[0036] Low-voltage connecting part 140; low-voltage connecting line 141;

[0037] Low-voltage plug-in part 142; first section 1421; second section 1422;

[0038] First limiting hole 150;

[0039] First accommodating cavity 160; second accommodating cavity 161;

[0040] Converging plate 170; positive electrode terminal 171; negative electrode terminal 172; positive electrode high-voltage wire harness 173; negative electrode high-voltage wire harness 174;

[0041] First mounting part 180; second mounting part 181;

[0042] Grounding wire 190; grounding terminal 191;

[0043] High-voltage outlet 200;

[0044] Air conditioning system 210;

[0045] First direction X; second direction Y; third direction Z. DETAILED DESCRIPTION

[0046] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0047] Unless otherwise defined, all technical and scientific terms used in the present application have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used in the present application are only for the purpose of describing specific embodiments of the present application and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion. The terms "first", "second" and the like in the specification and claims of the present application or the above description of drawings are used to distinguish different objects, rather than to describe a particular order or primary and secondary relationship.

[0048] In the present application, the term "embodiment" means that the specific features, structures or characteristics described in conjunction with the embodiment can be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in the present application can be combined with other embodiments.

[0049] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mount", "connect", "connection", "attach" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be direct connection, or indirect connection through intermediate medium, or internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0050] In the present application, the term "and / or" is only a description of the association relationship between the associated objects, which means that there can be three kinds of relationships, for example, A and / or B can represent the existence of A alone, the existence of A and B together, and the existence of B alone. In addition, the character " / " in the present application generally represents an "or" relationship between the front and rear associated objects.

[0051] In the present application, "multiple" means two or more (including two), and similarly, "multiple groups" means two or more groups (including two groups), and "multiple pieces" means two or more pieces (including two pieces).

[0052] With the popularity of new energy electric vehicles and hybrid electric vehicles, the battery and electric drive system needs to be preheated in cold environments to ensure performance and life, and the PTC heater assembly can provide efficient heating and constant temperature control, which can improve the working efficiency and stability of the battery and electric drive system, so PTC plays an important role in new energy vehicles and has an irreplaceable role on the performance of the vehicle.

[0053] The PTC heater assembly is a sub-assembly of the air conditioning system, and is combined with the air conditioning box to form a large assembly. The low-voltage line and the high-voltage line are connected in series to ensure the function of the circuit. The PTC heater assembly is connected to the low-voltage wire harness assembly through the low-voltage connector. The low-voltage wire harness assembly refers to the function of connecting the low-voltage connector of the PTC heater assembly to the external low-voltage line.

[0054] However, since the low-voltage connector is arranged near the air conditioning box air pipe, in the case of large vibration of the whole vehicle, the low-voltage connector and the air pipe are easy to collide and produce abnormal noise.

[0055] Therefore, the PTC heater assembly and the air conditioning system are provided. The PTC heater assembly comprises a shell, a heating cell, a thermal protector and a low-voltage connector. The shell has a receiving cavity. The heating cell is arranged in the receiving cavity and has a first end and a second end arranged opposite to each other along a first direction. The thermal protector is arranged at the first end and connected to the heating cell. The low-voltage connector comprises a low-voltage connecting line and a low-voltage connector. One end of the low-voltage connecting line is connected to the thermal protector, and the other end of the low-voltage connecting line is connected to the low-voltage connector. The shell has a first limiting hole, and the low-voltage connector is inserted and matched in the first limiting hole, so that the low-voltage connector is fixed to the shell.

[0056] In the above scheme, the low-voltage connector is inserted and matched in the first limiting hole, so that the low-voltage connector is fixed to the shell. In this way, the probability of collision between the low-voltage connector and other parts of the air conditioning system is reduced, the probability of abnormal noise of the low-voltage connector is reduced, and the use comfort of the driver is improved.

[0057] The PTC heater assembly and the air conditioning system provided by the embodiments of the present application can be used in vehicles.

[0058] The following embodiments are described by taking the PTC heater assembly of an embodiment of the present application as an example for convenience of description.

[0059] Figure 1 The structure schematic diagram of the PTC heater assembly provided by the embodiments of the present application is shown in the figure; Figure 2 The structure schematic diagram of the PTC heater assembly provided by the embodiments of the present application is shown in the figure; Figure 3 The structure and position of the first limiting hole are shown in the figure; Figure 4 The structure and position of the low-voltage connector are shown in the figure;Figure 5 A structural schematic diagram of an air conditioning system provided by an embodiment of the present application.

[0060] Please refer to Figures 1 to 4 In the embodiment, the PTC heater assembly 100 includes a shell 110, a heating electric core 120, a thermal protector 130, and a low-voltage connecting piece 140. The shell 110 has a receiving cavity. The heating electric core 120 is arranged in the receiving cavity and has a first end 121 and a second end 122 arranged oppositely along a first direction X. The thermal protector 130 is arranged at the first end 121 and connected with the heating electric core 120. The low-voltage connecting piece 140 includes a low-voltage connecting wire 141 and a low-voltage plug-in piece 142. One end of the low-voltage connecting wire 141 is connected with the thermal protector 130, and the other end of the low-voltage connecting wire 141 is connected with the low-voltage plug-in piece 142. The shell 110 has a first limiting hole 150, and the low-voltage plug-in piece 142 is plug-in fitted in the first limiting hole 150, so that the low-voltage plug-in piece 142 is fixed to the shell 110.

[0061] The shell 110 envelopes the heating electric core 120. The shell 110 can be manufactured by a process such as injection molding, and the material can be selected from plastics or metals that are resistant to high temperature and have good insulation performance, so as to ensure the safety and durability thereof.

[0062] The heating electric core 120 is arranged in the receiving cavity and has the first end 121 and the second end 122 arranged oppositely along the first direction X. The heating electric core 120, as a core heating component, can automatically adjust the resistance according to the temperature, so as to achieve a stable heating effect.

[0063] The thermal protector 130 is arranged at the first end 121 of the heating electric core 120 and connected therewith. The thermal protector 130 can monitor the temperature of the heating electric core 120 in real time. When the temperature exceeds a set threshold, the thermal protector 130 can quickly cut off the circuit, so as to prevent the heating electric core 120 from being damaged due to overheating, and effectively ensure the safe operation of the equipment. For example, the thermal protector 130 includes a thermal sensitive element and a control device. When the equipment overheats, the thermal sensitive element can sense the change of the temperature and serve as a protection mechanism to cut off the circuit of the heating electric core 120, so as to prevent the heating electric core 120 from being damaged due to overheating.

[0064] The low-voltage connecting piece 140 includes the low-voltage connecting wire 141 and the low-voltage plug-in piece 142. One end of the low-voltage connecting wire 141 is connected with the thermal protector 130, and the other end of the low-voltage connecting wire 141 is connected with the low-voltage plug-in piece 142. In this way, the thermal protector 130 is connected with an external low-voltage control circuit. The shell 110 has the first limiting hole 150, and the low-voltage plug-in piece 142 is plug-in fitted in the first limiting hole 150, so that the low-voltage plug-in piece 142 is fixed to the shell 110 and limited in the first limiting hole 150.

[0065] Moreover, the low-voltage plug 142 builds a simple connection bridge between the thermal protector 130 and the external low-voltage control circuit, and the circuit can be connected and disconnected through a simple plug-in operation, which greatly improves the electrical connection efficiency of the PTC heater assembly 100 and the external device, and facilitates quick access and debugging in different device systems.

[0066] For example, the heater assembly 100 can be arranged inside the vehicle air conditioning system 210. When the car shakes or vibrates during driving, the low-voltage plug 142 will not shake or swing because it is limited in the first limiting hole 150, that is, the low-voltage plug 142 will not collide with other parts of the air conditioning system 210, reducing the probability of abnormal noise of the low-voltage plug 142 and improving the comfort of the driver.

[0067] Moreover, compared with the low-voltage plug 142 arranged outside the shell 110, the wire harness connection between the low-voltage plug 142 and the thermal protector 130 is shorter because the low-voltage plug 142 is limited in the first limiting hole 150, reducing the manufacturing cost of the heater assembly 100.

[0068] Please refer to Figures 1 to 4 In this embodiment, the shell 110 includes a first wall 111 and a second wall 112, which are oppositely arranged along a second direction Y perpendicular to the first direction X; the first wall 111 is provided with a first limiting hole 150, and the low-voltage plug 142 includes a first section 1421 and a second section 1422, the outer diameter of the second section 1422 is greater than that of the first section 1421, and the second section 1422 is arranged outside the shell 110, and the first section 1421 is plugged into the first limiting hole 150.

[0069] The first limiting hole 150 is arranged on the first wall 111. When the low-voltage plug 142 is inserted into the first limiting hole 150, the first section 1421 will be arranged in the first limiting hole 150 because the outer diameter of the second section 1422 is greater than that of the first section 1421, and the second section 1422 will not be limited in the first limiting hole 150, and the second section 1422 can prevent the low-voltage plug 142 from falling into the accommodating cavity.

[0070] The outer diameter of the second section 1422 is greater than that of the first section 1421 and is arranged outside the shell 110. This structure enables the low-voltage plug 142 to be limited in multiple directions after being plugged into the first limiting hole 150, not only preventing loosening in the insertion direction, but also effectively resisting lateral displacement caused by vibration, external force pulling, etc., greatly enhancing the stability of the electrical connection part.

[0071] Moreover, since the outer diameter of the second section 1422 is greater than the inner diameter of the first section 1421, the second section 1422 is located outside the shell 110, and when connecting the PTC heater assembly 100 and the external circuit, the external circuit can be directly connected with the low-voltage connector 142, so that the installation process is more intuitive and simple. During the assembly process, the operator does not need to enter the shell 110 to connect the PTC heater assembly 100 and the external circuit, thereby reducing the assembly difficulty and improving the installation efficiency.

[0072] Specifically, the outer diameter of the second section 1422 is greater than the outer diameter of the first section 1421, and the second section 1422 is arranged outside the shell 110. On the one hand, the low-voltage connector 142 can be fixed and limited on the shell 110, thereby reducing the probability of the low-voltage connector 142 shaking and colliding to generate abnormal sound. On the other hand, it is also convenient for the assembly personnel to assemble, thereby reducing the assembly difficulty and improving the assembly efficiency.

[0073] Please refer to Figures 1 to 4 In the embodiment, the PTC heater assembly 100 further comprises a partition plate arranged in the shell 110 to divide the accommodating cavity into a first accommodating cavity 160 and a second accommodating cavity 161, and the heat-generating cell 120 is arranged in the first accommodating cavity 160. The PTC heater assembly 100 further comprises a bus bar 170 and a high-voltage connecting wire. The bus bar 170 is connected with the heat-generating cell 120, and the high-voltage connecting wire is connected with the bus bar 170 and extends out of the shell 110. The bus bar 170 and the high-voltage connecting wire are arranged in the second accommodating cavity 161.

[0074] The partition plate, as its name implies, can divide the accommodating cavity. The partition plate can be made of a material with good insulation performance and certain mechanical strength, such as an insulating plastic plate or an insulating treated metal sheet, and is cut and formed according to the design size. The size of the partition plate is ensured to be accurately matched with the internal size of the shell 110, so as to realize a close assembly fit.

[0075] The external high-voltage power supply is connected with the bus bar 170 through the high-voltage connecting wire. The bus bar 170 can converge the current from the external high-voltage power supply and then uniformly and stably distribute the current to each part of the heat-generating cell 120. In this way, it can be ensured that each part of the heat-generating cell 120 can obtain appropriate and equal current, thereby ensuring that the heat-generating cell 120 uniformly generates heat and improving the heating efficiency and stability of the PTC heater as a whole. The situation that some heat-generating cells 120 are overheated or insufficiently heated due to uneven distribution of current is avoided.

[0076] The heat-generating battery cell 120 is arranged in the first accommodating cavity 160, the bus plate 170 and the high-voltage connecting wire are arranged in the second accommodating cavity 161, and the partition plate effectively separates the accommodating cavities, so that the layout of each component is more regular, and the mutual interference between components with different functions is prevented. For example, the heat generated by the heat-generating battery cell 120 during operation will not directly affect the high-voltage connecting wire and the bus plate 170, thereby reducing the risk of short circuit and other safety hazards caused by heat transfer. At the same time, through the specific mounting mode and fixing means, the stability of each component is guaranteed during transportation and equipment operation, and the risk of failure caused by loose components is reduced.

[0077] Specifically, the partition plate arranges the bus plate 170 and the high-voltage connecting wire in the second accommodating cavity 161, and the PTC heater assembly 100 is arranged in the first accommodating cavity 160, thereby reducing the mutual influence between components and enabling the internal components of the PTC heater assembly 100 to operate more stably and reliably.

[0078] Please refer to Figures 1 to 4 In this embodiment, the bus plate 170 includes a positive bus plate and a negative bus plate, and the PTC heater assembly further includes a high-voltage wire harness, the high-voltage wire harness includes a positive high-voltage wire harness 173 and a negative high-voltage wire harness 174; the positive bus plate includes a positive terminal 171, and the negative bus plate includes a negative terminal 172; the positive high-voltage wire harness 173 is connected to the positive terminal 171, and the negative high-voltage wire harness 174 is connected to the negative terminal 172.

[0079] The arrangement of the positive bus plate and the negative bus plate, in cooperation with the positive high-voltage wire harness 173 and the negative high-voltage wire harness 174, realizes accurate control and transmission of current. The positive terminal 171 and the negative terminal 172 are respectively connected to the corresponding positive high-voltage wire harness 173 and negative high-voltage wire harness 174, so as to ensure that the current can accurately flow into and out of the heat-generating battery cell 120, thereby further improving the stability and efficiency of the heat-generating battery cell 120. This clear positive and negative shunt design reduces current turbulence and energy loss, and improves the energy efficiency ratio of the entire PTC heater assembly 100.

[0080] Moreover, the positive high-voltage wire harness 173 is connected to the positive terminal 171, and the negative high-voltage wire harness 174 is connected to the negative terminal 172, so that the electrical connection is more stable and reliable. Compared with a single bus plate 170 structure, in the face of a high-current, high-voltage working environment, it can better withstand electrical load, thereby reducing the risk of line burning, equipment failure and other risks caused by current overload or poor connection.

[0081] Exemplarily, the PTC heater assembly 100 can further include a high-voltage outlet 200, from which the positive high-voltage wire harness 173 and the negative high-voltage wire harness 174 exit the PTC heater assembly 100. The high-voltage outlet 200 can be adapted to a 2PIN high-voltage wire, forming a non-polar PTC, or a 4PIN high-voltage wire, forming a gear PTC.

[0082] In addition, it can greatly facilitate troubleshooting. When an electrical fault occurs, maintenance personnel can quickly determine whether the positive line or the negative line is the problem. By detecting the corresponding positive terminal 171, negative terminal 172 and connected high-voltage wire harness, the fault point can be quickly located, improving maintenance efficiency and reducing equipment downtime.

[0083] Please refer to Figures 1 to 4 In this embodiment, along the second direction Y, the heat-generating battery cell 120 has a third end 123 and a fourth end 124 arranged opposite to each other, and the busbar 170 and the low-voltage plug-in part 142 are both located on the side of the third end 123 away from the fourth end 124. The first direction X is perpendicular to the second direction Y.

[0084] The busbar 170 and the low-voltage plug-in part 142 are both located on the side of the third end 123 of the heat-generating battery cell 120 away from the fourth end 124, so that the busbar 170 and the low-voltage plug-in part 142 are both located on the same side, facilitating the assembly of the heater assembly 100 and being conducive to the daily maintenance of the heater assembly 100.

[0085] Please refer to Figures 1 to 4 In this embodiment, a layer of potting material is arranged in the second accommodating cavity 161 to fix the low-voltage connecting wire 141, the busbar 170 and the high-voltage connecting wire.

[0086] The layer of potting material is filled in the second accommodating cavity 161 to firmly fix the low-voltage connecting wire 141, the busbar 170 and the high-voltage connecting wire. When the device is subjected to vibration, jolt or other external force impact, the components will not be displaced to cause loose connection, wire breakage and the like. For example, during the driving of an automobile, it is inevitable to encounter a bumpy section. At this time, the layer of potting material can ensure that the electrical connection components inside the PTC heater assembly 100 remain stable, maintain the normal operation of the device, and greatly improve the durability of the product.

[0087] In addition, the layer of potting material can play a good protective role, effectively blocking dust, moisture, oil stains and other impurities from entering the second accommodating cavity 161, avoiding corrosion or damage of these impurities to the low-voltage connecting wire 141, the busbar 170 and the high-voltage connecting wire, so that the PTC heater assembly 100 can be normally used in harsh environments, such as dusty industrial workshops, humid outdoor environments and the like, widening the application scenarios of the product.

[0088] Since the PTC heater assembly 100 generates condensate water during the process of cooperating with the air conditioning system 210 to refrigerate or heat, the potting material in the second accommodating cavity 161 can prevent the condensate water from flowing out of the first limiting hole 150, effectively avoiding the condensate water in the air conditioning box from dripping from the low-voltage connector.

[0089] Please refer to Figures 1 to 4 In the embodiment, the shell 110 includes a first shell 113 and a second shell 114, which are oppositely arranged along a third direction Z, and the second shell 114 is detachably arranged on the first shell 113, and the first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0090] The shell 110 is designed as the first shell 113 and the second shell 114, and the first shell 113 and the second shell 114 are detachably connected, which facilitates the design and manufacture of the mold during the manufacturing process. Compared with the integrally formed shell 110, the separate manufacture of the two shells 110 can reduce the complexity of the mold, improve the production efficiency and reduce the production cost.

[0091] In the assembly process, the staff can more conveniently place the heating cell 120, the busbar 170, the low-voltage connecting wire 141, the high-voltage connecting wire and other components in the accommodating cavity of the first shell 113, and then install the second shell 114. This step-by-step assembly method reduces the assembly difficulty and improves the assembly accuracy and efficiency.

[0092] When a certain component in the PTC heater assembly 100 fails, since the second shell 114 is detachably arranged on the first shell 113, the maintenance personnel can easily open the second shell 114 to quickly access the internal components for inspection, maintenance or replacement. For example, if the high-voltage connecting wire in the potting material layer has a problem, the maintenance personnel need not damage the entire assembly structure, but only need to remove the second shell 114 to process the faulty component. This greatly shortens the maintenance time and reduces the loss caused by equipment downtime. Moreover, this design facilitates the regular maintenance of the internal components and prolongs the service life of the equipment.

[0093] Specifically, the second shell 114 is detachably arranged on the first shell 113, which can improve the production efficiency of the heater assembly 100 and facilitate the maintenance and repair of the heater assembly 100.

[0094] Please refer to Figures 1 to 4 In the embodiment, the PTC heater assembly 100 further includes two first mounting portions 180, which are spaced apart at the two ends of the first shell 113 along the first direction X.

[0095] Exemplarily, the first mounting portion 180 is provided with a first mounting hole, and the first mounting portion 180 can be fixed to a position corresponding to the installation of the PTC heater assembly 100 of the air conditioner by a fastener such as a bolt.

[0096] The two first mounting portions 180 are arranged at the two ends of the first shell 113 along the first direction X, which can fix the PTC heater assembly 100 more firmly in the corresponding position, and can also make the stress of the PTC heater assembly more uniform, thereby improving the stability and reliability of the structure of the heater assembly 100.

[0097] In some embodiments, the PTC heater assembly 100 further comprises a second mounting portion 181, which is arranged on the first wall 111 and is used to fix the PTC structure in the corresponding position of the air conditioning system 210.

[0098] Please refer to Figures 1 to 5 In this embodiment, the PTC heater assembly 100 further comprises a grounding wire 190 and a grounding terminal 191, and the grounding terminal 191 is arranged on the second end 122 and connected with the grounding wire 190.

[0099] The PTC heater assembly 100 further comprises a grounding wire 190 and a grounding terminal 191, and the grounding terminal 191 is connected with the heating electric core 120, and the grounding wire 190 is connected with the grounding terminal 191. In this way, once an electrical fault occurs inside the PTC heater assembly 100, such as a current leakage caused by a damaged insulation layer of the heating electric core 120, the path formed by the grounding terminal 191 and the grounding wire 190 can quickly guide the leakage to the ground, thereby improving the stability and reliability of the operation of the PTC heater assembly 100.

[0100] The embodiment of the present application also provides an air conditioning system 210, which comprises the PTC heater assembly 100 of any one of the embodiments of the present application.

[0101] The low-voltage plug-in part 142 is plug-in matched in the first limiting hole 150, so as to fix the low-voltage plug-in part 142 to the shell 110, which can reduce the probability of collision between the low-voltage plug-in part 142 and other parts of the air conditioning system 210, reduce the probability of abnormal sound of the low-voltage plug-in part 142, and improve the use comfort of the driver.

[0102] It should also be noted that the terms "comprises" and / or "comprising", or "includes" and / or "including" when used in this specification, specify the presence of stated features, integers, steps, operations, elements, or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or groups thereof. In the context of the specification, the term "and / or" means "and" or "or", and the term "or" means "and" or "or". In the context of the specification, the term "exemplary" means "example" or "an example of".

[0103] Each of the embodiments in the specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other. Each of the embodiments focuses on the difference from other embodiments. In particular, for the system embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and the relevant parts can be referred to the part of the method embodiments.

[0104] The above only describes the embodiments of the present application and is not intended to limit the present application. Those skilled in the art can make various modifications and changes to the present application. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the scope of the claims of the present application.

[0105] Although the embodiments of the present application are described in conjunction with the drawings, those skilled in the art can make various modifications and changes without departing from the spirit and scope of the present application, and such modifications and changes fall within the scope defined by the appended claims.

Claims

1. A PTC heater assembly, characterized by, The PTC heater assembly comprises: a shell having a receiving cavity; a heating cell arranged in the receiving cavity and having a first end and a second end arranged oppositely along a first direction; a thermal protector arranged at the first end and connected with the heating cell; a low-voltage connector comprising a low-voltage connecting wire and a low-voltage plug, one end of the low-voltage connecting wire being connected with the thermal protector, and the other end of the low-voltage connecting wire being connected with the low-voltage plug; wherein the shell has a first limiting hole, and the low-voltage plug is inserted and fitted in the first limiting hole so as to fix the low-voltage plug to the shell.

2. The PTC heater assembly of claim 1, wherein, The shell comprises a first wall and a second wall arranged oppositely along a second direction perpendicular to the first direction; the first wall is provided with the first limiting hole, and the low-voltage plug comprises a first segment and a second segment, the outer diameter of the second segment being larger than that of the first segment, the second segment being arranged outside the shell, and the first segment being inserted and fitted with the first limiting hole.

3. The PTC heater assembly of claim 1, wherein, The PTC heater assembly further comprises a partition plate arranged in the shell to divide the receiving cavity into a first receiving cavity and a second receiving cavity, and the heating cell is arranged in the first receiving cavity; the PTC heater assembly further comprises a busbar connected with the heating cell and a high-voltage connecting wire connected with the busbar and extending out of the shell, and the busbar and the high-voltage connecting wire are arranged in the second receiving cavity.

4. The PTC heater assembly of claim 3, wherein, The busbar comprises a positive busbar and a negative busbar; the PTC heater assembly further comprises a high-voltage wire harness comprising a positive high-voltage wire harness and a negative high-voltage wire harness; the positive busbar comprises a positive terminal, the negative busbar comprises a negative terminal, the positive high-voltage wire harness is connected with the positive terminal, and the negative high-voltage wire harness is connected with the negative terminal.

5. The PTC heater assembly of claim 3, wherein, Along the second direction, the heating cell has a third end and a fourth end arranged oppositely, the busbar and the low-voltage plug are located on a side of the third end away from the fourth end, and the first direction and the second direction are perpendicular to each other.

6. The PTC heater assembly of claim 3, wherein, The second receiving cavity is provided with a layer of potting material to fix the low-voltage connecting wire, the busbar and the high-voltage connecting wire.

7. The PTC heater assembly of any one of claims 2 or 5, wherein, The shell comprises a first shell and a second shell arranged oppositely along a third direction, the second shell being detachably arranged in the first shell, and the first direction, the second direction and the third direction are perpendicular to each other.

8. The PTC heater assembly of claim 7, wherein, The PTC heater assembly further comprises two first mounting portions arranged at two ends of the first shell along the first direction.

9. The PTC heater assembly of claim 1, wherein, The PTC heater assembly further comprises a grounding wire and a grounding terminal, the grounding terminal being arranged at the second end and connected with the grounding wire.

10. An air conditioning system characterized by, The PTC heater assembly comprises any one of the PTC heater assemblies according to claims 1-9.

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