Vehicle cooling system and automobile

Abstract

The utility model relates to a vehicle cooling system and an automobile. The vehicle cooling system comprises a cooling water loop and a refrigerant loop, wherein the cooling water loop is cooled through a radiator, and the refrigerant loop is cooled through an air conditioner condenser. A heat exchanger is arranged between the cooling water loop and the refrigerant loop, the heat exchanger is installed on a heat exchange branch of the refrigerant loop, and the heat exchange branch is provided with an electromagnetic valve used for controlling whether a refrigerant is introduced into the heat exchanger or not. According to the vehicle cooling system and the automobile, the cooling capacity of the whole automobile can be distributed more flexibly, the extra cooling capacity in an air conditioning system can meet the rapidly-increased heat dissipation requirement under the extreme condition in an energy distribution mode, and the safety performance is guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle heat dissipation, and in particular to a vehicle cooling system and a vehicle. Background Art

[0002] Low-temperature components in the car that need forced cooling are forced to cool by low-temperature radiator water cooling. Due to the heating characteristics of some parts, in most cases, the thermal efficiency is high and the heat dissipation is small.

[0003] In rare extreme cases, thermal efficiency will drop and the cooling demand will increase dramatically.

[0004] The current way to solve the sharp increase in heat dissipation demand under extreme conditions is to increase the cooling capacity of the radiator to ensure that the increased heat dissipation demand can be met under extreme conditions. As a result, the front cabin requires a larger layout space and a larger air inlet area, which undoubtedly increases the volume occupied by the radiator and the cooling water circuit. Utility Model Content

[0005] The purpose of this application is to provide a vehicle cooling system and a vehicle, which can distribute the cooling capacity of the entire vehicle more flexibly, and through energy distribution, allow the extra excess cooling capacity in the air-conditioning system to meet the sharply increased heat dissipation demand under extreme conditions, thereby ensuring safety performance.

[0006] In order to achieve the above-mentioned object, in a first aspect, the utility model provides a vehicle cooling system, comprising: a cooling water circuit for cooling through a radiator, and a refrigerant circuit for cooling through an air-conditioning condenser;

[0007] A heat exchanger is provided between the cooling water circuit and the refrigerant circuit. The heat exchanger is installed on a heat exchange branch of the refrigerant circuit. The heat exchange branch is provided with a solenoid valve for controlling whether the refrigerant flows into the heat exchanger.

[0008] By setting a heat exchanger between the cooling water circuit and the refrigerant circuit, the low-temperature water can be further cooled in the heat exchanger. By simultaneously entering the refrigerant in the heat exchanger, the cooling capacity of the air-conditioning condenser is utilized to achieve optimal configuration of the cooling capacity in the air-conditioning system, so that the further cooled low-temperature water can meet the sharply increased heat dissipation demand and break through the cooling capacity limitation under extreme conditions.

[0009] Combined with installing the heat exchanger on the heat exchange branch of the refrigerant circuit and setting the solenoid valve on the heat exchange branch, the refrigerant channel of the heat exchanger can be controlled on and off in a targeted manner according to the heat dissipation demand of the cooling water circuit to control whether the refrigerant enters the heat exchanger, thereby effectively and reliably controlling the opening and closing of further cooling of the low-temperature water.

[0010] In an optional embodiment, the heat exchanger is equipped with an electronic expansion valve, and the electronic expansion valve is arranged on the pipe through which the refrigerant enters the heat exchanger.

[0011] The electronic expansion valve can adjust the flow rate of refrigerant entering the heat exchanger, thereby achieving precise control of the low-temperature water temperature.

[0012] In an optional embodiment, a control unit is further included, and the solenoid valve and the electronic expansion valve are electrically connected to the control unit respectively.

[0013] By electrically connecting the solenoid valve and the electronic expansion valve to the control unit, the control unit can control the on-off of the solenoid valve and adjust the opening of the electronic expansion valve according to the actual cooling capacity required by the vehicle.

[0014] In an optional embodiment, the refrigerant circuit includes a refrigerant output pipe for outputting the cooled refrigerant, and the heat exchange branch includes a bypass branch connected to the refrigerant output pipe.

[0015] By setting the heat exchange branch as a bypass branch of the refrigerant output pipe, the flow path of the refrigerant can be selectively controlled so that the refrigerant can flow in the refrigerant output pipe to maintain the normal circulation of the refrigerant circuit. It can also selectively flow into the heat exchange branch serving as a bypass branch. Combined with the installation of the heat exchanger on the heat exchange branch and the setting of the solenoid valve on the heat exchange branch, the flow direction of the cooled refrigerant can be adjusted so that it can further cool the low-temperature water after passing into the heat exchanger. While flexibly distributing the cooling capacity of the air-conditioning system, it can meet the demand for more heat dissipation in the cooling water circuit.

[0016] In an optional embodiment, the heat exchange branch includes a refrigerant branch output pipe arranged between the refrigerant output pipe and the heat exchanger, and the solenoid valve is installed on the refrigerant branch output pipe.

[0017] The solenoid valve can control the on-off of the refrigerant branch output pipe, thereby controlling whether the refrigerant enters the heat exchanger.

[0018] In an optional embodiment, a heat exchange tube is provided inside the heat exchanger, the refrigerant branch output pipe is connected to the heat exchange tube, and the electronic expansion valve is installed between the connecting pipe port of the refrigerant branch output pipe and the connecting pipe port of the heat exchange tube.

[0019] The electronic expansion valve can further adjust the flow of refrigerant into the heat exchanger, thereby accurately controlling the cooling temperature of the low-temperature water.

[0020] In an optional embodiment, the heat exchanger includes a shell cooling cavity, and the heat exchange tube is arranged in a winding manner in the shell cooling cavity.

[0021] By arranging the heat exchange tubes in a winding manner, the heat exchange area of ​​the heat exchange tubes can be increased, thereby improving the heat exchange efficiency between the refrigerant and low-temperature water in the heat exchanger.

[0022] In an optional embodiment, the cooling water circuit includes a cooling water outlet pipe for outputting cooled cooling water, and the heat exchanger is connected to the cooling water outlet pipe.

[0023] Through the above-mentioned arrangement, the cooled low-temperature water can be further cooled, thereby improving the temperature reduction capacity of the low-temperature water medium in the cooling water circuit.

[0024] In an optional embodiment, the heat exchanger includes a shell, and a cooling water inlet and a cooling water outlet are provided on the shell, and the cooling water outlet pipe is connected to the cooling water inlet and the cooling water outlet respectively.

[0025] By passing low-temperature water into the shell side of the heat exchanger, the low-temperature water in the heat exchanger can fully exchange heat with the refrigerant in the tube side, thereby enhancing the cooling effect of the low-temperature water.

[0026] In a second aspect, the utility model provides a vehicle, comprising a vehicle body and a vehicle cooling system according to any one of the aforementioned embodiments.

[0027] By setting a heat exchanger between the cooling water circuit and the refrigerant circuit, the refrigerant and low-temperature water can exchange heat in the heat exchanger, which can effectively distribute the cooling capacity of the entire vehicle. Part of the compressed cooling capacity in the air-conditioning system can be allocated to the cooling water circuit for radiator cooling. In extreme conditions, the extra excess cooling capacity in the air-conditioning system can meet the sharply increased heat dissipation demand and ensure safety performance.

[0028] The setting of the heat exchange branch on the refrigerant circuit, combined with the installation of the heat exchanger and the solenoid valve that controls whether the refrigerant passes into the heat exchanger on the heat exchange branch, can specifically control and adjust the flow path of the refrigerant, thereby achieving the technical goal of flexibly distributing the cooling capacity of the entire vehicle.

[0029] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 It is a schematic diagram of the structure of the vehicle cooling system in this application;

[0032] Figure 2 Schematic diagram of the structure of the heat exchanger.

[0033] icon:

[0034] 1-cooling water circuit; 11-cooling water outlet pipe;

[0035] 2-refrigerant circuit; 21-heat exchange branch; 21a-refrigerant branch output pipe; 22-refrigerant output pipe;

[0036] 3-heat exchanger; 31-heat exchange tube; 32-shell cooling chamber; 33-shell; 33a-cooling water inlet; 33b-cooling water outlet;

[0037] 4- Solenoid valve;

[0038] 5-Electronic expansion valve;

[0039] 6-Expansion kettle;

[0040] 7- Water pump;

[0041] 8- Radiator;

[0042] 9- Condenser. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0044] In the description of this application, it should be noted that the terms "inside", "outside", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the application is usually placed when in use, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0045] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0046] The vehicle cooling system in the present application is mainly used in the flexible allocation of cooling capacity of the whole vehicle. Specifically, by coupling the radiator system with the air-conditioning refrigeration system, a connection is established between the cooling water circuit of normal heat dissipation cooling and the refrigerant circuit of the air-conditioning system condenser refrigeration. While realizing the transfer of part of the cooling capacity in the air-conditioning refrigeration system to the heat dissipation cooling system, the cooling capacity supply in the radiator system can be met under extreme working conditions when the heat dissipation demand increases sharply.

[0047] See also Figure 1-Figure 2 The vehicle cooling system in the utility model has a main structure including a cooling water circuit 1 cooled by a radiator 8 and a refrigerant circuit 2 cooled by an air-conditioning condenser 9 .

[0048] A heat exchanger 3 is provided between the cooling water circuit 1 and the refrigerant circuit 2. The heat exchanger 3 is specifically connected to the cooling water circuit 1 in series. At the same time, the heat exchanger 3 is installed on the heat exchange branch 21 of the refrigerant circuit 2, so that the refrigerant can further cool the low-temperature water through the heat exchanger 3, and part of the cold capacity in the refrigerant circuit 2 is allocated to the cooling water circuit 1. In the extreme case of a sharp increase in heat dissipation demand, the cold capacity of the refrigerant can be used to supplement the sharply increased heat dissipation demand of the low-temperature components.

[0049] Combined with the solenoid valve 4 provided on the heat exchange branch 21, the switching flow of the refrigerant in the refrigerant circuit 2 and the heat exchange branch 21 can be controlled. When there is a demand for cooling capacity adjustment, the solenoid valve 4 can be opened to further cool the low-temperature water.

[0050] The technical principles of the utility model mainly include:

[0051] When the refrigerant changes from liquid to gas, its temperature drops sharply, forming a medium in a gas-liquid mixed state with an extremely low temperature.

[0052] When the refrigerant in a gas-liquid mixed state flows through the heat exchanger 3, it exchanges heat with the low-temperature water on the other side of the heat exchanger 3, absorbs the heat of the low-temperature water, and reduces the temperature of the low-temperature water. After the temperature of the low-temperature water is reduced, it can take away more heat when it flows through the components again. The whole process is cyclical, thereby achieving the purpose of improving the heat dissipation capacity of the cooling water circuit 1 and meeting the sharply increased heat dissipation requirements of the components.

[0053] At the same time, based on the refrigerant circuit 2, the refrigerant flow path is controlled by the solenoid valve 4, which can be opened when needed to allow the refrigerant to pass into the heat exchanger 3 for heat exchange, and according to the demand, the flow rate of the refrigerant is controlled to accurately control the water temperature of the low-temperature water.

[0054] The control of the refrigerant flow is specifically carried out through the electronic expansion valve 5, which is installed on the heat exchanger 3. Further, the electronic expansion valve 5 is set on the pipe through which the refrigerant enters the heat exchanger 3. The electronic expansion valve 5 can adjust the flow of the refrigerant entering the heat exchanger 3, and then based on the fixed heat exchange efficiency of the heat exchanger 3, the temperature of the low-temperature water after further cooling can be accurately controlled.

[0055] In one specific embodiment, the vehicle cooling system also includes a control unit. By electrically connecting the solenoid valve 4 and the electronic expansion valve 5 to the control unit respectively, the control unit can specifically control the on-off of the solenoid valve 4 and the opening of the electronic expansion valve 5 according to the cooling demand in the radiator system.

[0056] Based on the structural composition of the refrigerant circuit 2, the refrigerant circuit 2 includes a refrigerant output pipe 22, which is specifically used to output the cooled refrigerant. In order to achieve targeted adjustment of the refrigerant flow path, the heat exchange branch 21 includes a bypass branch connected to the refrigerant output pipe 22.

[0057] Under normal operating conditions, the cooling water circuit 1 and the refrigerant circuit 2 circulate independently. When cooling capacity is required, the solenoid valve 4 is opened, so that the refrigerant in the refrigerant circuit 2 does not circulate in the refrigerant circuit 2, but enters the heat exchanger 3 through the heat exchange branch 21 in the form of a bypass branch.

[0058] The solenoid valve 4 is specifically used to control the flow direction switching of the refrigerant in the refrigerant output pipe 22 in its own refrigerant circuit 2 and the bypass heat exchange branch 21. Based on this, combined with the flow of the refrigerant in different pipelines, and the distinction of the pipe sections of the heat exchanger 3 on the heat exchange branch 21, the heat exchange branch 21 includes a refrigerant branch output pipe 21a arranged between the refrigerant output pipe 22 and the heat exchanger 3. After the refrigerant is cooled in the condenser 9, it is output through the refrigerant branch output pipe 21a and transported to the heat exchanger 3 for heat exchange with low-temperature water.

[0059] Furthermore, the solenoid valve 4 is installed on the refrigerant branch output pipe 21a, and can control the on-off of the refrigerant branch output pipe 21a by opening and closing the solenoid valve 4, thereby achieving the technical effect of controlling the flow switching of the refrigerant between the heat exchange branch 21 and the refrigerant output pipe 22.

[0060] The refrigerant in this embodiment is introduced into the heat exchange tube 31 of the heat exchanger 3 , that is, the refrigerant flows in the tube side of the heat exchanger 3 , and the low-temperature water flows in the shell side of the heat exchanger 3 .

[0061] Specifically, a heat exchange tube 31 is provided inside the heat exchanger 3, and the refrigerant branch output pipe 21a is connected to the heat exchange tube 31, so that the refrigerant medium in the refrigerant circuit 2 can pass into the heat exchange tube 31. From the perspective of the electronic expansion valve 5 controlling the refrigerant flow rate, the electronic expansion valve 5 is installed between the butt joint port of the refrigerant branch output pipe 21a and the butt joint port of the heat exchange tube 31. Through this arrangement, the flow rate of the refrigerant can be accurately controlled, and the cooling capacity of the whole vehicle can be flexibly adjusted.

[0062] In the above-mentioned flow of the refrigerant in the tube side of the heat exchanger 3 and the flow of the low-temperature water in the shell side of the heat exchanger 3 , the heat exchanger 3 includes a shell cooling chamber 32 , and the heat exchange tubes 31 are arranged in a winding manner in the shell cooling chamber 32 .

[0063] The arrangement length and heat exchange area of ​​the heat exchange tube 31 in the shell cooling cavity 32 can be increased, so that the low-temperature water entering the shell cooling cavity 32 and the refrigerant entering the heat exchange tube 31 can fully exchange heat.

[0064] Based on the above-mentioned refrigerant output pipe 22, it is used to output the cooled refrigerant, and then pass it into the heat exchanger 3. The low-temperature water in this embodiment is also further cooled by the refrigerant after being cooled. Specifically, the cooling water circuit 1 includes a cooling water outlet pipe 11, which is used to output the low-temperature water cooled by the radiator 8. The heat exchanger 3 is connected to the cooling water outlet pipe 11, and the cooled refrigerant passed into the heat exchanger 3 further cools the cooled low-temperature water.

[0065] From the structural perspective of the heat exchanger 3 , in combination with the low-temperature water passing into the shell cooling cavity 32 of the heat exchanger 3 , the heat exchanger 3 includes a shell 33 , and the cavity of the shell 33 constitutes the shell cooling cavity 32 .

[0066] The shell 33 is provided with a cooling water inlet 33a and a cooling water outlet 33b, and the cooling water outlet pipe 11 is connected to the cooling water inlet 33a and the cooling water outlet 33b respectively, and then the water is pressurized by the water pump 7 to flow to the components to cool the components that need to be cooled.

[0067] The low-temperature water in the present invention is preferably in the form of antifreeze liquid. An expansion kettle 6 is connected to the cooling water outlet pipe 11, and the thermal expansion and contraction characteristics of the antifreeze liquid can be used to achieve automatic adjustment of the liquid.

[0068] In another specific embodiment, the utility model also includes a car, which includes a whole vehicle body and the above-mentioned vehicle cooling system. The refrigerant circuit 2 in the air-conditioning system supplements the heat dissipation demand of the cooling water circuit 1 in extreme conditions, thereby allowing the radiator 8 and the cooling water circuit 1 to have a more flexible design space.

[0069] The automobile in this embodiment can be equipped with cooling capacity of the entire vehicle more flexibly, increase the energy distribution method, and ensure the safety performance of the automobile through more reasonable cooling capacity distribution under extreme conditions.

[0070] It should be noted that, in the absence of conflict, the features in the embodiments of this application may be combined with each other.

[0071] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A vehicle cooling system, characterized in that: include: A cooling water circuit for cooling through a radiator, and a refrigerant circuit for cooling through an air conditioner condenser; A heat exchanger is provided between the cooling water circuit and the refrigerant circuit. The heat exchanger is installed on a heat exchange branch of the refrigerant circuit. The heat exchange branch is provided with a solenoid valve for controlling whether the refrigerant flows into the heat exchanger.

2. The vehicle cooling system according to claim 1, characterized in that: The heat exchanger is equipped with an electronic expansion valve, which is arranged on a pipe through which the refrigerant enters the heat exchanger.

3. The vehicle cooling system according to claim 2, characterized in that: It also includes a control unit, and the solenoid valve and the electronic expansion valve are electrically connected to the control unit respectively.

4. The vehicle cooling system according to claim 2, characterized in that: The refrigerant circuit includes a refrigerant output pipe for outputting the cooled refrigerant, and the heat exchange branch includes a bypass branch connected to the refrigerant output pipe.

5. The vehicle cooling system according to claim 4, characterized in that: The heat exchange branch includes a refrigerant branch output pipe arranged between the refrigerant output pipe and the heat exchanger, and the solenoid valve is installed on the refrigerant branch output pipe.

6. The vehicle cooling system according to claim 5, characterized in that: A heat exchange tube is arranged inside the heat exchanger, the refrigerant branch output pipe is butt-jointed with the heat exchange tube, and the electronic expansion valve is installed between the butt joint port of the refrigerant branch output pipe and the butt joint port of the heat exchange tube.

7. The vehicle cooling system according to claim 6, characterized in that: The heat exchanger comprises a shell cooling cavity, and the heat exchange tube is arranged in a winding manner in the shell cooling cavity.

8. The vehicle cooling system according to claim 7, characterized in that: The cooling water circuit comprises a cooling water outlet pipe for outputting cooled cooling water, and the heat exchanger is connected to the cooling water outlet pipe.

9. The vehicle cooling system according to claim 8, characterized in that: The heat exchanger comprises a shell, on which a cooling water inlet and a cooling water outlet are arranged, and the cooling water outlet pipe is connected to the cooling water inlet and the cooling water outlet respectively.

10. An automobile, characterized in that: The vehicle cooling system comprises a vehicle body and the vehicle cooling system according to any one of claims 1 to 9.

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