Refrigerating and heating device, heat pump system and vehicle

Abstract

The invention provides a refrigerating and heating device, a heat pump system and a vehicle, and relates to the technical field of vehicle parts. The refrigerating and heating device comprises a compressor and a liquid heater, the compressor comprises a first shell and a compressor body located in the first shell, the liquid heater comprises a second shell and a heating core located in the second shell, and the first shell and the second shell are connected and internally define a communicated cavity. According to the refrigerating and heating device, the compressor and the liquid heater are designed in an integrated mode, light weight and integration are achieved, and the weight of the whole device and the matching complexity of parts are reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile parts, in particular to a refrigeration and heating device, a heat pump system and a vehicle. BACKGROUND

[0002] In recent years, the automobile industry is developing rapidly towards electrification and intelligentization, and the research and development of parts for electric vehicles is continuously advancing.

[0003] Among them, the heat pump system of the electric vehicle needs to meet the dual-mode demand of refrigeration and heating, and its core functions include: in refrigeration mode, the compressor drives the refrigerant circulation to realize efficient cooling of the vehicle cabin and battery pack; and in heating mode, the liquid heater (PTC) directly heats the circulating liquid to realize rapid heating.

[0004] However, in existing electric vehicles, the heat pump system usually adopts a decentralized layout, and the decentralized layout of multiple components leads to a sharp increase in the number of pipelines, occupies a large amount of cabin space, and increases the assembly difficulty and system cost. SUMMARY

[0005] The present application provides a refrigeration and heating device, a heat pump system and a vehicle, which integrates the compressor and the liquid heater to realize lightweight and integration, and reduces the weight of the entire device and the complexity of matching between components.

[0006] In order to achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0007] The first aspect of the present application provides a refrigeration and heating device, comprising:

[0008] a compressor, the compressor comprising a first shell and a compressor body located in the first shell;

[0009] a liquid heater, the liquid heater comprising a second shell and a heating core located in the second shell, the first shell and the second shell being connected and internally surrounding a connected cavity.

[0010] In a possible implementation manner, further comprising:

[0011] a circuit board assembly, the circuit board assembly being arranged in the cavity, and the compressor body and the heating core being electrically connected with the circuit board assembly.

[0012] In a possible implementation manner, the circuit board assembly comprises a circuit board and an electronic device, and the circuit board is provided with a high-voltage circuit part, a low-voltage circuit part and an isolator for isolating the high-voltage circuit part and the low-voltage circuit part;

[0013] The electronic device comprises high-voltage devices and low-voltage devices, the high-voltage devices are located in the high-voltage circuit part, and the low-voltage devices are located in the low-voltage circuit part;

[0014] The first shell is provided with high-voltage connectors and low-voltage connectors, one end of the high-voltage connectors is electrically connected with the high-voltage devices of the high-voltage circuit part, and one end of the low-voltage connectors is electrically connected with the low-voltage devices of the low-voltage circuit part.

[0015] The heating core is electrically connected with the high-voltage devices of the high-voltage circuit part.

[0016] In a possible implementation, the low-voltage circuit part comprises a communication circuit and a low-voltage power supply circuit, the communication circuit is used for communication with a controller and communication with a control unit of the high-voltage circuit part.

[0017] The low-voltage power supply circuit is used for filtering processing on an input low-voltage power supply.

[0018] In a possible implementation, the high-voltage circuit part comprises a high-voltage relay circuit, the high-voltage relay circuit comprises first and second relays, and the first and second relays are used for switching the working modes of the compressor and the liquid heater, the working modes comprising a refrigeration mode of the compressor and a heating mode of the liquid heater.

[0019] In a possible implementation, the second shell has a containing cavity, the second shell is provided with a liquid inlet and a liquid outlet which are communicated with the containing cavity; the liquid heater further comprises:

[0020] A heating core is arranged in the containing cavity, the heating core is internally provided with a core rod, the core rod is provided with a resistance wire thereon, and the heating core extends along the height direction of the containing cavity.

[0021] The heating core at least comprises first and second sub-tube segments located in first and second layers respectively, and a bending segment, the bending segment connects the first and second sub-tube segments.

[0022] In a possible implementation, the first sub-tube segment comprises first, second and third straight line segments, the second sub-tube segment comprises fourth, fifth and sixth straight line segments, and the bending segment comprises first, second, third, fourth and fifth arc line segments.

[0023] The first straight line segment is connected to the sixth straight line segment through the first arc line segment, the sixth straight line segment is connected to the fifth straight line segment through the second arc line segment, the fifth straight line segment is connected to the fourth straight line segment through the third arc line segment, the fourth straight line segment is connected to the third straight line segment through the fourth arc line segment, and the third straight line segment is connected to the second straight line segment through the fifth arc line segment.

[0024] In a possible implementation, the mandrel includes a first lead-out rod and a second lead-out rod, which are respectively arranged in the first straight line segment and the second straight line segment, and the two ends of the resistance wire are respectively wound on the first lead-out rod and the second lead-out rod, and the ends of the first lead-out rod and the second lead-out rod respectively protrude from the first straight line segment and the second straight line segment, and are respectively used for connecting the positive electrode and the negative electrode of the power supply.

[0025] In a possible implementation, a flow channel is arranged in the accommodating cavity of the second shell, the flow channel is located between the accommodating cavity and the heating core body, and has a gap with the heating core body, and the shape of the flow channel matches the outer contour shape of the heating core body.

[0026] In a possible implementation, a partition plate is further arranged in the accommodating cavity of the second shell, the accommodating cavity is divided into a first accommodating sub-cavity and a second accommodating sub-cavity in communication by the partition plate, the flow channel is arranged in each of the first accommodating sub-cavity and the second accommodating sub-cavity, and each of the first accommodating sub-cavity and the second accommodating sub-cavity is provided with one heating core body.

[0027] In a possible implementation, a plurality of heat dissipation fins are arranged at the outer periphery of the tube wall of the heating core body, and the heat dissipation fins extend outward along the radial direction of the heating core body; the heat dissipation fin includes a first annular portion and a second annular portion connected to each other, the first annular portion and the second annular portion are respectively provided with a first connecting hole and a second connecting hole, and the heat dissipation fin is sleeved on two straight line segments connected to each other through the first connecting hole and the second connecting hole.

[0028] In a possible implementation, the heat dissipation fin is welded and fixed to the outer periphery of the tube wall of the heating core body through a connecting sleeve.

[0029] In a possible implementation, a seat body is further included, which is sealingly connected to the second shell, the seat body has a receiving cavity, a circuit board assembly is located in the receiving cavity, and the circuit board assembly is electrically connected to the mandrel; the seat body includes a first top wall close to the second shell, a protrusion is formed on the side of the first top wall close to the accommodating cavity, an arc-shaped groove is arranged on the protrusion, and the arc-shaped segment of the heating core body abuts against the arc-shaped groove.

[0030] In a possible implementation, the second shell is provided with an inlet liquid channel and an outlet liquid channel, which are respectively communicated with the inlet liquid port and the outlet liquid port, and the inlet liquid channel and the outlet liquid channel are both communicated with the containing cavity;

[0031] The first top wall of the seat body is provided with two protruding portions, which are spaced apart from the protruding blocks, and the two protruding portions are respectively opposite to the inlet liquid port and the outlet liquid port, and respectively extend into the inlet liquid channel and the outlet liquid channel, and the protruding portions are provided with mounting grooves, and temperature sensors are arranged in the mounting grooves.

[0032] In a possible implementation, at least one temperature fuse and / or a flow meter are further included, the temperature fuse is connected to the side of the first top wall of the seat body facing the containing cavity, and the temperature fuse is electrically connected to the circuit board assembly;

[0033] The flow meter is arranged in the containing cavity and is signal connected to the circuit board assembly.

[0034] The refrigeration and heating device provided in the first aspect of the present application has at least the following beneficial effects:

[0035] By connecting the first shell in the compressor and the second shell in the liquid heater, the interiors of the first shell and the second shell form a communicating cavity, so that the compressor and the liquid heater are integrated, lightweight and integrated, and the weight of the whole device and the matching complexity between components are reduced.

[0036] The second aspect of the present application provides a heat pump system, which comprises the above-mentioned refrigeration and heating device, a first heat exchanger and a second heat exchanger, the first heat exchanger is connected with a cold water inlet, a cold water outlet, the second heat exchanger and the compressor of the refrigeration and heating device, the liquid heater of the refrigeration and heating device is connected with a hot water inlet and the second heat exchanger, and the second heat exchanger is connected with a hot water outlet and the liquid heater of the refrigeration and heating device.

[0037] The third aspect of the present application provides a vehicle, which comprises the above-mentioned heat pump system or the above-mentioned refrigeration and heating device.

[0038] The heat pump system provided in the second aspect of the present application and the vehicle provided in the third aspect of the present application have all the beneficial effects of the refrigeration and heating device provided in the first aspect of the present application, which will not be described herein. BRIEF DESCRIPTION OF DRAWINGS

[0039] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments of this application or the prior art will be briefly introduced below. Obviously, the drawings described below are only a part of the embodiments of this application. These drawings and text descriptions are not intended to limit the scope of the concept of this application in any way, but to illustrate the concept of this application to those skilled in the art by referring to specific embodiments. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 This is a schematic diagram of the structure of the refrigeration and heating device provided in the embodiments of this application;

[0041] Figure 2 This is an exploded view of the refrigeration and heating device provided in the embodiments of this application;

[0042] Figure 3 This is a schematic diagram of the circuit board assembly of the cooling and heating device provided in the embodiments of this application;

[0043] Figure 4 A schematic diagram of the overall structure of the liquid heater of the refrigeration and heating device provided in the embodiments of this application;

[0044] Figure 5 for Figure 4 Exploded view;

[0045] Figure 6 for Figure 4 A schematic diagram of the cross-sectional structure;

[0046] Figure 7 for Figure 4 Schematic diagram of the cross-sectional structure along the BB direction;

[0047] Figure 8 for Figure 5 A schematic diagram of the structure of the heating core and heat sink;

[0048] Figure 9 for Figure 8 A schematic diagram of the overall structure of the intermediate heating core;

[0049] Figure 10 for Figure 8 A schematic diagram of the structure of a single heat sink;

[0050] Figure 11 To show Figure 5 A schematic diagram of the assembly of the second shell and the heating core;

[0051] Figure 12 for Figure 5 Schematic diagram of the structure of the second shell in the middle;

[0052] Figure 13 This is a schematic diagram of the heat pump system provided in an embodiment of this application.

[0053] Explanation of reference numerals in the attached figures:

[0054] 100. Base body;

[0055] 101. Flow channel shell;

[0056] 110. Receiving cavity; 120. First top wall;

[0057] 130. Protrusion; 131. Arc groove;

[0058] 140. Protrusion; 141. Mounting slot; 142. Temperature sensor;

[0059] 150. High-voltage connector; 160. Low-voltage connector; 170. Sealing gasket;

[0060] 180. Cover plate; 190. Sealant;

[0061] 200. Second shell;

[0062] 210. Receiving cavity; 220. Liquid inlet; 230. Liquid outlet;

[0063] 240, Flow channel; 250, Partition plate; 260, First receiving cavity;

[0064] 270. Second receiving chamber; 280. Liquid inlet channel; 290. Liquid outlet channel;

[0065] 300. Heating core;

[0066] 310. First sub-pipe section;

[0067] 311, First straight segment; 3111, First electrode;

[0068] 312, the second straight segment; 3121, the second electrode;

[0069] 313. The third straight segment;

[0070] 320. Second sub-pipe section;

[0071] 321. Fourth straight segment; 322. Fifth straight segment; 323. Sixth straight segment;

[0072] 330. Bending section;

[0073] 331. First arc segment; 332. Second arc segment;

[0074] 333, the third arc segment; 334, the fourth arc segment; 335, the fifth arc segment;

[0075] 340. Heat dissipation fins;

[0076] 341, First annular portion; 3411, First connecting hole;

[0077] 342. Second annular portion; 3421. Second connecting hole;

[0078] 343. Connecting part; 3431. Heat dissipation hole; 350. Connecting sleeve;

[0079] 400, resistance wire;

[0080] 500, Circuit board assembly; 501, Low-voltage circuit section; 5011, Communication circuit; 5012, Low-voltage power supply circuit; 502, High-voltage circuit section; 5021, High-voltage relay circuit; 5022, First relay; 5023, Second relay; 510, Insulated gate bipolar transistor; 520, Thermally conductive insulating pad;

[0081] 600. Flow meter;

[0082] 700. Temperature fuse;

[0083] 800. Compressor; 801. First housing;

[0084] 900. Liquid heater;

[0085] 1000, Heat pump system; 1001, First heat exchanger; 1002, Second heat exchanger; 1003, Electronic expansion valve; 1004, First water temperature sensor; 1005, First water pump; 1006, First radiator; 1007, Second water temperature sensor; 1008, Second water pump; 1009, Second radiator. Detailed Implementation

[0086] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0087] As described in the background section, in existing electric vehicles, heat pump systems typically employ a distributed layout. This multi-component distributed layout leads to a surge in the number of pipes, occupies a large amount of cabin space, and increases assembly difficulty and system cost.

[0088] To address the aforementioned technical problems, a first aspect of this application provides a cooling and heating device. This device includes a compressor and a liquid heater. The compressor includes a first housing and a compressor body located within the first housing. The liquid heater includes a second housing and a heating core located within the second housing. The first housing and the second housing are connected and internally form a communicating cavity. Thus, the cooling and heating device provided by this application connects the first housing of the compressor to the second housing of the liquid heater, creating a communicating cavity between the interiors of the first and second housings. This allows for an integrated design of the compressor and liquid heater, achieving lightweighting and integration, reducing the overall weight of the device and the complexity of component matching.

[0089] A second aspect of this application provides a heat pump system, which includes the aforementioned cooling and heating device, a first heat exchanger, and a second heat exchanger. The first heat exchanger is connected to a cold water inlet, a cold water outlet, the second heat exchanger, and the compressor of the cooling and heating device. The liquid heater of the cooling and heating device is connected to a hot water inlet and the second heat exchanger. The second heat exchanger is connected to a hot water outlet and the liquid heater of the cooling and heating device.

[0090] A third aspect of this application provides a vehicle that includes the heat pump system described above, or includes the cooling and heating device described above.

[0091] To make the above-mentioned objectives, features, and advantages of the embodiments of this application more apparent and understandable, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0092] This application provides a cooling and heating device, a heat pump system, and a vehicle. By connecting a first housing in a compressor to a second housing in a liquid heater, the interiors of the first and second housings form a connected cavity, thereby enabling the compressor and liquid heater to be integrated into a single design. This achieves lightweighting and integration, reducing the overall weight of the device and the complexity of component matching. The specific structure of the cooling and heating device and heat pump system provided in this application will be described below with reference to the accompanying drawings.

[0093] refer to Figure 1 as well as Figure 2In a first aspect, embodiments of this application provide a cooling and heating device. This device may include a compressor 800 and a liquid heater 900. In one possible implementation, the compressor 800 may further include a first housing 801 and a compressor body, with the compressor body located within the first housing 801. Additionally, the liquid heater 900 may further include a second housing 200 and a heating core 300, with the heating core 300 located within the second housing 200. It is understood that the first housing 801 is connected to the second housing 200, and the interiors of the first housing 801 and the second housing 200 form a communicating cavity. Integrating the compressor 800 and the liquid heater 900 achieves lightweighting and integration, reducing the overall weight of the device and the complexity of component matching.

[0094] Continue to refer to Figure 2 Based on the above embodiments, the cooling and heating device may further include a flow channel housing 101. The flow channel housing 101 may be provided with a flow channel 240. In one possible implementation, the shape of the flow channel 240 on the flow channel housing 101 may be adapted to the shape of the heating core 300, thereby allowing the heating core 300 to cooperate with the flow channel housing 101. This application does not limit the scope of the embodiments described herein.

[0095] Continue to refer to Figure 2 Based on the above embodiments, the cooling and heating device may further include a circuit board assembly 500. The circuit board assembly 500 may be disposed within the cavity, and both the compressor body and the heating core 300 may be electrically connected to the circuit board assembly 500. In this way, the circuit board assembly 500 can share functions with both the compressor 800 and the liquid heater 900, maximizing the utilization of circuit board resources and reducing costs.

[0096] refer to Figure 3 Based on the above embodiments, the circuit board assembly 500 may further include a circuit board and electronic components. The circuit board may include a high-voltage circuit section 502, a low-voltage circuit section 501, and an isolator. It is understood that the isolator is used to isolate the high-voltage circuit section 502 and the low-voltage circuit section 501.

[0097] Based on the above embodiments, the electronic device may include high-voltage devices and low-voltage devices. In this embodiment, the high-voltage device is located in the high-voltage circuit section 502, and correspondingly, the low-voltage device is located in the low-voltage circuit section 501.

[0098] In one possible implementation, the first housing 801 may be provided with a high-voltage connector 150 and a low-voltage connector 160. One end of the high-voltage connector 150 can be electrically connected to the high-voltage device of the high-voltage circuit section 502, and correspondingly, one end of the low-voltage connector 160 can be electrically connected to the low-voltage device of the low-voltage circuit section 501. Additionally, the heating core 300 can also be electrically connected to the high-voltage device of the high-voltage circuit section 502.

[0099] Continue to refer to Figure 3 Based on the above embodiments, the low-voltage circuit section 501 may include a communication circuit 5011 and a low-voltage power supply circuit 5012. It is understood that the communication circuit 5011 can be used to communicate with the controller and with the control unit of the high-voltage circuit section 502. Additionally, the low-voltage power supply circuit 5012 can be used to filter the input low-voltage power supply.

[0100] Continue to refer to Figure 3 Based on the above embodiments, the high-voltage circuit section 502 may include a high-voltage relay circuit 5021. The high-voltage relay circuit 5021 may further include a first relay 5022 and a second relay 5023. It is understood that the first relay 5022 and the second relay 5023 can be used to switch the operating modes of the compressor 800 and the liquid heater 900. In this embodiment, the operating modes may include a cooling mode for the compressor 800 and a heating mode for the liquid heater 900.

[0101] In one possible implementation, the first relay 5022 may have a first terminal, a second terminal, and a third terminal. In this embodiment, the first terminal of the first relay 5022 may be connected to the positive terminal of a high-voltage power supply. The second terminal of the first relay 5022 may be connected to the input terminals of multiple switching transistors. The third terminal of the first relay 5022 may be connected to the liquid heater 900. It is understood that the first relay 5022 can be used to connect the first terminal and the second terminal of the first relay 5022 when the mode selection signal indicates the cooling mode. Additionally, when the mode selection signal indicates the heating mode, the connection between the first terminal and the third terminal of the first relay 5022 is activated.

[0102] In one possible implementation, the second relay 5023 may also have a first terminal, a second terminal, and a third terminal. In this embodiment, the first terminal of the second relay 5023 can be connected to the output terminal of the switching transistor, the second terminal of the second relay 5023 can be connected to the U phase of the compressor 800, and the third terminal of the second relay 5023 is turned off. It is understood that the second relay 5023 can be used to connect the first terminal and the second terminal of the second relay 5023 when the mode selection signal indicates the cooling mode. Additionally, when the mode selection signal indicates the heating mode, the first terminal and the third terminal of the second relay 5023 are connected.

[0103] refer to Figures 4 to 12 The liquid heater 900 provided in this application embodiment includes a second housing 200 and a heating core 300. The second housing 200 has a receiving cavity 210, and the second housing 200 is provided with a liquid inlet 220 and a liquid outlet 230 communicating with the receiving cavity 210. The heating core 300 is disposed in the receiving cavity 210, and a core rod is disposed inside the heating core 300. A resistance wire 400 is wound on the core rod. The heating core 300 extends along the height direction of the receiving cavity 210. The heating core 300 includes at least a first sub-tube segment 310 and a second sub-tube segment 320 located in the first layer and the second layer, respectively, and a bent section 330. The bent section 330 connects the first sub-tube segment 310 and the second sub-tube segment 320. Further, the tube body of the heating core 300 is a metal tube body, which is conducive to heat transfer. The liquid inlet 220 and the liquid outlet 230 on the second housing 200 are respectively used to connect to the inlet and outlet of the liquid source device.

[0104] In this way, by setting a heating core 300 structure with a first sub-tube segment 310 and a second sub-tube segment 320 connected by a bending segment 330 in the second housing 200 cavity 210, the heating core 300 extends bidirectionally along the width and height of the cavity 210, thereby forming a multi-layer continuous heating structure in the cavity 210. Compared with the split heating core 300 layout, the overall structure is simplified and the spatial heating uniformity of the heater is significantly improved.

[0105] Furthermore, the heating core 300 is provided with an insulating and thermally conductive filler, for example, magnesium oxide powder, which is filled between the resistance wire 400 and the inner wall of the heating core 300.

[0106] In some embodiments, the first sub-pipe segment 310 includes a first straight segment 311, a second straight segment 312, and a third straight segment 313; the second sub-pipe segment 320 includes a fourth straight segment 321, a fifth straight segment 322, and a sixth straight segment 323; and the bending segment 330 includes a first arc segment 331, a second arc segment 332, a third arc segment 333, a fourth arc segment 334, and a fifth arc segment 335. The first straight segment 311 is connected to the sixth straight segment 323 via the first arc segment 331; the sixth straight segment 323 is connected to the fifth straight segment 322 via the second arc segment 332; the fifth straight segment 322 is connected to the fourth straight segment 321 via the third arc segment 333; the fourth straight segment 321 is connected to the third straight segment 313 via the fourth arc segment 334; and the third straight segment 313 is connected to the second straight segment 312 via the fifth arc segment 335.

[0107] The core rod includes a first lead rod and a second lead rod, which are respectively disposed in the first straight segment 311 and the second straight segment 312. The two ends of the resistance wire 400 are respectively wound around the first lead rod and the second lead rod. The ends of the first lead rod and the second lead rod extend out relative to the first straight segment 311 and the second straight segment 312, and are respectively used to connect the positive and negative terminals of the power supply.

[0108] In more examples, the first lead-out rod and the second lead-out rod are respectively sealed and connected to the first straight segment 311 and the second straight segment 312 of the heating core 300 by a sealing member. For example, the sealing member is a sealant 190 to isolate moisture and prevent the magnesium oxide in the heating core 300 from absorbing water and becoming damp, which would cause a decrease in insulation resistance.

[0109] The second housing 200 has a flow channel 240 in its cavity 210. The flow channel 240 is located between the cavity 210 and the heating core 300 and has a gap between them. The shape of the flow channel 240 matches the outer contour of the heating core 300. In this way, the coolant is introduced into the flow channel 240 of the cavity 210 from the inlet 220. After heat exchange with the heating core 300, the coolant is gradually heated and flows out through the outlet 230. The combination of the bent structure of the flow channel 240 in the second housing 200 and the heating core 300 can further improve the space utilization of the cavity 210 and reduce the overall structural size of the heater under the same heating efficiency.

[0110] Combination Figure 7 The second housing 200 is also provided with an inlet channel 280 and an outlet channel 290, which are respectively connected to the inlet port 220 and the outlet port 230. Both the inlet channel 280 and the outlet channel 290 are connected to the receiving cavity 210.

[0111] The second housing 200 is further provided with a partition 250 in the cavity 210. The cavity 210 is divided into a first accommodating sub-cavity 260 and a second accommodating sub-cavity 270 that are connected by the partition 250. The first accommodating sub-cavity 260 and the second accommodating sub-cavity 270 are each provided with a flow channel 240 and a heating core 300.

[0112] In some embodiments, a plurality of heat dissipation fins 340 are provided at intervals on the outer periphery of the heating core 300, and the heat dissipation fins 340 extend outward along the radial direction of the heating core 300.

[0113] refer to Figure 10 The heat dissipation fins 340 are generally plate-shaped structures, including a first annular portion, a second annular portion, and a connecting portion. The first annular portion 341 is connected to the second annular portion 342 through the connecting portion 343. The first annular portion 341 and the second annular portion 342 are respectively provided with a first connecting hole 3411 and a second connecting hole 3421. The heat dissipation fins 340 are sleeved on the two connected straight segments through the first connecting hole 3411 and the second connecting hole 3421. In this way, the heat dissipation fins 340 are only provided on the outer periphery of the straight segments of the heating core 300, avoiding structural interference between the heat dissipation fins and the inner wall of the flow channel 240 when they are provided on the arc segment. Furthermore, the connecting portion 343 is provided with heat dissipation holes 3431.

[0114] The heat dissipation fins 340 are welded and fixed to the outer periphery of the heating core 300 tube wall via a connecting sleeve 350. With this design, the connecting sleeve 350 has a cylindrical side wall surface, which is fixed to the outer wall of the heating core 300 by welding. In this way, the side wall of the connecting sleeve 350 and the heating core 300 are in direct contact, which can increase the contact area between the heat dissipation fins and the heating core 300, improve the heat exchange area between the heating core 300 and the coolant, and thus transfer the heat of the heating core 300 to the coolant more quickly, improve the overall heat transfer performance and efficiency of the heater, and also effectively reduce the surface temperature of the heating core 300, thereby improving system safety.

[0115] In some embodiments, the device further includes a base 100, which is sealed to the second housing 200. The base 100 has a receiving cavity 110, and a circuit board assembly 500 is located in the receiving cavity 110. The circuit board assembly 500 is electrically connected to the mandrel. The base 100 is made of aluminum, which is beneficial for the lightweight design of the overall heater structure.

[0116] In this embodiment, the circuit board assembly 500 is connected to the vehicle air conditioning system. The circuit board assembly 500 can receive electrical signals from the air conditioning system to control the current conduction to the resistance wire 400, thereby controlling the heating core 300 to heat the coolant.

[0117] Furthermore, the seat 100 has a first top wall 120, and the second housing 200 is fixedly connected to the first top wall 120. The first top wall 120 separates the receiving cavity 210 and the receiving cavity 110. The receiving cavity 110 of the seat 100 is closed by a cover plate 180. Furthermore, the cover plate 180 is bonded to the cavity wall of the receiving cavity 110 of the seat 100 by a sealant 190. The receiving cavity 110, which is provided with the circuit board assembly 500, is separated from the receiving cavity 210 of the first top wall 120 and the second housing 200 as a control cavity.

[0118] In this way, the receiving cavity 210, which serves as the heating function, and the receiving cavity 110, which has an electrical control function, are respectively located on both sides of the aluminum body and isolated by the outer wall of one side of the seat 100. Compared with the structure of the heating cavity and the control cavity arranged vertically, the embodiment of this application has a mutually sealed structure with the seat 100 and the second housing 200 arranged horizontally, which eliminates the need to set an additional partition 250 between the two cavities, thus improving the structural compactness of the heater.

[0119] The housing 100 also has an insulated gate bipolar transistor 510 (IGBT) in the cavity 110. It is located on the side of the first top wall 120 of the housing 100 facing the cavity 110. The IGBT is electrically connected to the circuit board assembly 500 and acts as a circuit switch. Furthermore, the IGBT is connected to the first top wall 120 through a heat sink. Furthermore, a thermally conductive insulating pad 520 is provided between the IGBT and the heat sink.

[0120] The base 100 is also provided with a low-voltage connector 160 and a high-voltage connector 150, both of which are electrically connected to the circuit board assembly 500 and are used to electrically connect to an external low-voltage power supply and a high-voltage power supply, respectively.

[0121] In more examples, the first top wall 120 of the base 100 is provided with a first mounting hole and a second mounting hole at intervals. The first straight segment 311 and the second straight segment 312 of the heating core 300 pass through the first mounting hole and the second mounting hole respectively and extend into the receiving cavity 110. The first straight segment 311 and the second straight segment 312 are respectively welded to the first mounting hole and the second mounting hole, which ensures the installation stability of the heating core 300 on the base 100.

[0122] In some embodiments, a protrusion 130 is formed on the side of the first top wall 120 of the seat 100 near the receiving cavity 210, and an arcuate groove 131 is provided on the protrusion 130, and the arcuate segment of the heating core 300 abuts against the arcuate groove 131.

[0123] Furthermore, the arc-shaped segment of the heating core 300 is welded to the arc-shaped groove 131. For example, the welding method is brazing, which can improve the connection strength between the heating core 300 and the base 100 and ensure the structural stability of the heating core 300.

[0124] In some embodiments, reference Figure 7 The first top wall 120 of the base 100 is provided with two protrusions 140, which extend into the liquid inlet channel 280 and the liquid outlet channel 290 respectively. The protrusions 140 are provided with mounting grooves 141, and temperature sensors 142 are installed in the mounting grooves 141 for real-time acquisition and monitoring of the temperature of the liquid inlet 220 and the liquid outlet 230.

[0125] refer to Figure 11 It also includes at least one temperature fuse and / or flow meter 600, the temperature fuse being connected to the side of the first top wall 120 of the base 100 facing the receiving cavity 210 and electrically connected to the circuit board assembly 500; the flow meter 600 is disposed in the receiving cavity 210 and is signal connected to the circuit board assembly 500.

[0126] For example, the flow meter 600 is a Hall effect flow meter 600, which includes a rotating shaft and rotating blades circumferentially connected to the outside of the rotating shaft. The wall of the flow channel 240 inside the second housing 200 is provided with a connecting groove, and the rotating shaft of the flow meter 600 is arranged on the wall of the connecting groove. In this way, the flow channel 240 can serve as a mounting rib for the flow meter 600, simplifying the installation structure of the flow meter 600 in the second housing 200. A magnetic element is provided inside the Hall effect flow meter 600. The circuit board assembly 500 can collect the rotation speed of the Hall effect flow meter 600 by changing the magnetic field, so as to quickly and timely obtain the flow rate of the coolant in the receiving cavity 210. When the system flow rate is too low, the circuit board assembly 500 can reduce the power output or even stop heating.

[0127] The temperature fuse can be set to one, two or three. The temperature fuse is connected in series in the power supply circuit of the resistance wire 400. The temperature fuse is set on the back side of the corresponding protrusion 140 of the first top wall 120. In extreme cases, such as when the IGBT is short-circuited, the heating core 300 will continue to heat uncontrollably. In this case, the temperature fuse can monitor the temperature of the heating core 300 in time. When the temperature exceeds the threshold, the temperature fuse will automatically disconnect, cutting off the current transmission to the resistance wire 400 to avoid overheating and runaway of the heater.

[0128] refer to Figure 13Secondly, embodiments of this application provide a heat pump system 1000, wherein the heat pump system 1000 may include the aforementioned cooling and heating device, a first heat exchanger 1001, and a second heat exchanger 1002. In embodiments of this application, it is understood that the first heat exchanger 1001 can be connected to a cold water inlet, a cold water outlet, the second heat exchanger 1002, and the compressor 800 of the cooling and heating device; the liquid heater 900 of the cooling and heating device can be connected to a hot water inlet and the second heat exchanger 1002; and the second heat exchanger 1002 is connected to the hot water outlet and the liquid heater 900 of the cooling and heating device.

[0129] In this embodiment, in the cooling mode of the compressor 800 of the refrigeration and heating device, the refrigerant passing through the compressor 800 undergoes heat exchange through the second heat exchanger 1002, and then the refrigerant is throttled and depressurized by the electronic expansion valve 1003, so that the low-temperature and low-pressure refrigerant enters the first heat exchanger 1001 and exchanges heat with the liquid in the cold water inlet to cool it down. Then, the temperature of the liquid flowing out of the first heat exchanger 1001 is detected by the first water temperature sensor 1004, and then the liquid is circulated by the first water pump 1005. Finally, the liquid flowing out of the first water pump 1005 is cooled down again by the first radiator 1006, so that the liquid flows out of the cold water outlet and finally enters the user's refrigeration equipment to achieve the cooling mode.

[0130] In this embodiment, in the heating mode of the liquid heater 900 of the cooling and heating device, the liquid in the hot water inlet enters the liquid heater 900 for heating, exchanges heat through the second heat exchanger 1002, and then the second water temperature sensor 1007 detects the temperature of the liquid flowing out of the second heat exchanger 1002. The second water pump 1008 then provides circulation power for the liquid, and finally the second radiator 1009 cools the liquid flowing out of the second water pump 1008, so that the liquid is at a suitable temperature and flows out of the hot water outlet, and finally enters the user's heating equipment to achieve the heating mode.

[0131] Based on the above embodiments, the heat pump system 1000 provided in this application embodiment can receive thermal management commands from the system controller via CAN communication or LIN communication, and realize control in cooling mode, heating mode and ultra-low temperature heating mode.

[0132] When the system controller sends the thermal management mode as cooling mode via CAN communication, the following control flow is executed: the compressor 800 is enabled, the first relay 5022 is closed, and the second relay 5023 is opened. This process can be implemented through a specific relay drive circuit to ensure electrical isolation and safety.

[0133] The following protection functions are enabled in cooling mode:

[0134] When the ambient temperature sensor detects that the ambient temperature is below 2℃ (Amb_Temp < 2℃), the compressor 800 stops working immediately; when the ambient temperature rises to above 4℃ (Amb_Temp > 4℃), the compressor 800 resumes operation, thus achieving low-temperature environmental protection.

[0135] When the high-pressure sensor detects a pressure value exceeding 2.8 MPa (Snsr_Pressure > 2.8 MPa), the compressor 800 immediately stops operating; when the pressure value drops below 2.4 MPa (Snsr_Pressure < 2.4 MPa), the compressor 800 resumes operation, thus achieving over-pressure protection.

[0136] When the low-pressure PT sensor detects a pressure value below 0.3 MPa (Snsr_LoPressure < 0.3 MPa), the compressor 800 stops working immediately; when the pressure value rises back to above 0.5 MPa (Snsr_LoPressure > 0.5 MPa), the compressor 800 resumes operation, thus achieving low suction pressure protection.

[0137] When the superheat value calculated by the system controller is lower than 1℃ (Snsr_SupHeat < 1℃), the compressor 800 is stopped immediately; when the superheat value rises to above 3℃ (Snsr_SupHeat > 3℃), the compressor 800 is resumed to achieve underheat protection.

[0138] After detecting that both the first water pump 1005 and the second water pump 1008 are turned on, the compressor 800 starts after a 15-second delay to ensure that the water circulation in the system is established and to achieve water pump start-up delay protection.

[0139] When the system controller sends the thermal management mode as heating mode via CAN communication, the following control procedure is executed: The compressor 800 enable flag is set to Enable. The first relay 5022 is closed, while the second relay 5023 is opened.

[0140] In heating mode, the following protection functions are enabled:

[0141] When the ambient temperature sensor detects that the ambient temperature is below -7℃ (Amb_Temp < -7℃), the compressor 800 stops working immediately; when the ambient temperature rises above -5℃ (Amb_Temp > -5℃), the compressor 800 resumes operation, thus achieving low-temperature environmental protection.

[0142] When the high-pressure sensor detects a pressure value exceeding 3.0 MPa (Snsr_Pressure > 3.0 MPa), the compressor 800 is immediately stopped; when the pressure value drops below 2.8 MPa (Snsr_Pressure < 2.8 MPa), the compressor 800 resumes operation, thus achieving over-pressure protection.

[0143] When the low-pressure PT sensor detects a pressure value below 0.2 MPa (Snsr_LoPressure < 0.2 MPa), the compressor 800 stops working immediately; when the pressure value rises back to above 0.3 MPa (Snsr_LoPressure > 0.3 MPa), the compressor 800 resumes operation, thus achieving low suction pressure protection.

[0144] When the superheat value calculated by the system controller is lower than 1℃ (Snsr_SupHeat < 1℃), the compressor 800 is stopped immediately; when the superheat value rises to above 3℃ (Snsr_SupHeat > 3℃), the compressor 800 is resumed to achieve underheat protection.

[0145] After detecting that both the first water pump 1005 and the second water pump 1008 are turned on, the compressor 800 starts after a 15-second delay to ensure that the water circulation in the system is established and to achieve water pump start-up delay protection.

[0146] When the system controller sends a message via CAN communication indicating that the thermal management mode is heating mode and the ambient temperature is extremely low, the following control procedure is executed: The compressor 800 enable flag is set to Enable. The first relay 5022 is closed, while the second relay 5023 is opened.

[0147] The following protection functions are enabled in the ultra-low temperature heating mode:

[0148] When the ambient temperature sensor detects that the ambient temperature is higher than 25℃ (Amb_Temp > 25℃), the liquid heater 900 stops working immediately; when the ambient temperature drops to below 20℃ (Amb_Temp < 20℃), the liquid heater 900 resumes operation, thus achieving high-temperature environmental protection.

[0149] When the temperature sensor detects a temperature value exceeding 65℃ (Coolt_Temp1 > 65℃), the liquid heater 900 immediately stops working; when the temperature value drops below 55℃ (Coolt_Temp1 < 55℃), the liquid heater 900 resumes operation, thus achieving overheat protection for the liquid heater 900 outlet water temperature.

[0150] After detecting that the first water pump 1005 has started, the liquid heater 900 starts 15 seconds later to ensure that the water circulation in the system is established and to achieve water pump start-up delay protection.

[0151] Thirdly, embodiments of this application provide a vehicle (not shown in the figures), wherein, in one possible implementation, the vehicle may include the aforementioned heat pump system 1000. Alternatively, in another possible implementation, the vehicle may include the aforementioned cooling and heating device.

[0152] The various embodiments or implementation methods described in this specification are presented in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other.

[0153] It should be noted that phrases such as "in specific implementations," "in some embodiments," "in this embodiment," and "exemplarily" in the specification indicate that the described embodiments may include specific features, structures, or characteristics, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0154] Generally speaking, terms should be understood at least in part by their use in context. For example, at least in part by context, the term "one or more" as used in the text can be used to describe any feature, structure, or characteristic of the singular meaning, or a combination of features, structures, or characteristics of the plural meaning. Similarly, at least in part by context, terms such as "a" or "the" can also be understood to convey either singular or plural usage.

[0155] It should be readily understood that “on,” “above,” and “on top of” in this disclosure should be interpreted in the broadest manner, such that “on” means not only “directly on something” but also “on something” with an intermediate feature or layer therebetween, and that “above” or “on top of” means not only “on something” but also “on something” without an intermediate feature or layer therebetween (i.e., directly on something).

[0156] Furthermore, for ease of explanation, spatially relative terms such as "below," "below," "under," "above," and "above" may be used to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation other than those shown in the figures. The device may have other orientations (rotated 90 degrees or in other orientations), and the spatially relative descriptive terms used herein may be interpreted accordingly.

[0157] Finally, it should be noted that other embodiments of this application will readily conceive of by those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and alterations may be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A refrigeration and heating device, characterized in that, include: The compressor includes a first housing and a compressor body located within the first housing; A liquid heater, comprising a second housing and a heating core located within the second housing, wherein the first housing is connected to the second housing and the interior of the first housing forms a communicating cavity.

2. The refrigeration and heating device according to claim 1, characterized in that, Also includes: A circuit board assembly is disposed within the cavity, and both the compressor body and the heating core are electrically connected to the circuit board assembly.

3. The refrigeration and heating device according to claim 2, characterized in that, The circuit board assembly includes a circuit board and electronic components, and the circuit board is provided with a high-voltage circuit section, a low-voltage circuit section, and an isolator for isolating the high-voltage circuit section and the low-voltage circuit section. The electronic device includes a high-voltage device and a low-voltage device, wherein the high-voltage device is located in the high-voltage circuit section and the low-voltage device is located in the low-voltage circuit section; The first housing is provided with a high-voltage connector and a low-voltage connector. One end of the high-voltage connector is electrically connected to the high-voltage device of the high-voltage circuit section, and one end of the low-voltage connector is electrically connected to the low-voltage device of the low-voltage circuit section. The heating core is electrically connected to the high-voltage device in the high-voltage circuit section.

4. The refrigeration and heating device according to claim 3, characterized in that, The low-voltage circuit section includes a communication circuit and a low-voltage power supply circuit. The communication circuit is used for communication with the controller and for communication with the control unit of the high-voltage circuit section. The low-voltage power supply circuit is used to filter the input low-voltage power supply.

5. The refrigeration and heating device according to claim 3, characterized in that, The high-voltage circuit section includes a high-voltage relay circuit, which includes a first relay and a second relay. The first relay and the second relay are used to switch the operating modes of the compressor and the liquid heater. The operating modes include the compressor's cooling mode and the liquid heater's heating mode.

6. The refrigeration and heating device according to any one of claims 1-5, characterized in that, The second housing has a receiving cavity, and the second housing is provided with an inlet and an outlet communicating with the receiving cavity; The liquid heater further includes: A heating core is disposed within the receiving cavity. A core rod is disposed inside the heating core, and a resistance wire is wound around the core rod. The heating core extends along the height direction of the receiving cavity. The heating core includes at least a first sub-tube segment and a second sub-tube segment located in the first layer and the second layer respectively, as well as a bending segment connecting the first sub-tube segment and the second sub-tube segment.

7. The refrigeration and heating device according to claim 6, characterized in that, The first sub-pipe segment includes a first straight segment, a second straight segment, and a third straight segment; the second sub-pipe segment includes a fourth straight segment, a fifth straight segment, and a sixth straight segment; and the bent segment includes a first arc segment, a second arc segment, a third arc segment, a fourth arc segment, and a fifth arc segment. The first straight line segment is connected to the sixth straight line segment via the first arc segment, the sixth straight line segment is connected to the fifth straight line segment via the second arc segment, the fifth straight line segment is connected to the fourth straight line segment via the third arc segment, the fourth straight line segment is connected to the third straight line segment via the fourth arc segment, and the third straight line segment is connected to the second straight line segment via the fifth arc segment.

8. The refrigeration and heating device according to claim 7, characterized in that, The core rod includes a first lead and a second lead, which are respectively disposed within the first straight segment and the second straight segment. The two ends of the resistance wire are respectively wound around the first lead and the second lead. The ends of the first lead and the second lead extend out relative to the first straight segment and the second straight segment, respectively, and are used to connect to the positive and negative terminals of the power supply.

9. The refrigeration and heating device according to claim 6, characterized in that, The second housing has a flow channel in its receiving cavity. The flow channel is located between the receiving cavity and the heating core, and there is a gap between the flow channel and the heating core. The shape of the flow channel matches the outer contour shape of the heating core. The second housing is further provided with a partition in its accommodating cavity, which divides the accommodating cavity into a first accommodating sub-cavity and a second accommodating sub-cavity that are connected by the partition. Both the first accommodating sub-cavity and the second accommodating sub-cavity are provided with the flow channel and are respectively provided with a heating core.

10. The refrigeration and heating apparatus according to claim 7 or 8, characterized in that, The outer periphery of the heating core is provided with a plurality of heat dissipation fins, which extend outward along the radial direction of the heating core. The heat dissipation fins include a first annular portion and a second annular portion connected together. The first annular portion and the second annular portion are respectively provided with a first connecting hole and a second connecting hole. The heat dissipation fins are sleeved on the two connected straight segments through the first connecting hole and the second connecting hole. The heat dissipation fins are welded and fixed to the outer periphery of the heating core tube wall via a connecting sleeve.

11. The refrigeration and heating device according to claim 6, characterized in that, It also includes a base body that is sealed to the second housing, the base body having a receiving cavity, a circuit board assembly located within the receiving cavity, and the circuit board assembly being electrically connected to the mandrel; The base includes a first top wall near the second housing, and a protrusion is formed on the side of the first top wall near the receiving cavity. The protrusion is provided with an arc-shaped groove, and the arc-shaped segment of the heating core abuts against the arc-shaped groove.

12. The refrigeration and heating device according to claim 11, characterized in that, The second housing is provided with a liquid inlet channel and a liquid outlet channel, which are respectively connected to the liquid inlet and the liquid outlet. Both the liquid inlet channel and the liquid outlet channel are connected to the receiving cavity. The first top wall of the base is provided with two protrusions, which are spaced apart from the protrusions. The two protrusions are respectively opposite to the liquid inlet and the liquid outlet. The two protrusions extend into the liquid inlet channel and the liquid outlet channel respectively. The protrusions are provided with mounting grooves, and a temperature sensor is provided in the mounting grooves.

13. The refrigeration and heating device according to claim 12, characterized in that, It also includes at least one temperature fuse and / or flow meter, the temperature fuse being connected to the side of the first top wall of the housing facing the receiving cavity, and the temperature fuse being electrically connected to the circuit board assembly; The flow meter is disposed within the receiving cavity and is signal-connected to the circuit board assembly.

14. A heat pump system, characterized in that, The heat pump system includes a cooling and heating device as described in any one of claims 1-13, a first heat exchanger, and a second heat exchanger. The first heat exchanger is connected to a cold water inlet, a cold water outlet, the second heat exchanger, and the compressor of the cooling and heating device. The liquid heater of the cooling and heating device is connected to a hot water inlet and the second heat exchanger. The second heat exchanger is connected to a hot water outlet and the liquid heater of the cooling and heating device.

15. A vehicle, characterized in that, It includes the heat pump system of claim 14, or the cooling and heating device of any one of claims 1-13.

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