Vehicle air conditioning system

Abstract

The utility model provides a vehicle air conditioning system, include: a vehicle compressor, a bypass valve is connected between high pressure side and low pressure side of vehicle compressor, a condenser, the first end intercommunication high pressure side of vehicle compressor of condenser, an expansion valve, the first end of expansion valve is connected the second end of condenser, an air conditioner evaporimeter, the first end of air conditioner evaporimeter is connected the second end of expansion valve, and the second end of air conditioner evaporimeter is connected the low pressure side of vehicle compressor, a first temperature sensor is set up in the exhaust end of vehicle compressor, and the control end of expansion valve is connected to first temperature sensor, and a second temperature sensor is set up in the evaporimeter core body of air conditioner evaporimeter, and the control end of bypass valve is connected to second temperature sensor, the utility model discloses can effectively prevent the spring and autumn season vehicle air conditioning evaporimeter frost, avoid the frequent start -stop of compressor, improve stability, the oil return lubrication and cooling effect of compressor.

Description

Technical Field

[0001] This utility model relates to the field of vehicle-mounted refrigeration equipment, specifically to vehicle-mounted air conditioning systems. Background Technology

[0002] Currently, during spring and autumn, the evaporator of vehicle air conditioners is prone to frosting, causing the compressor to frequently start and stop. Due to the frequent intermittent operation and start-stop of the compressor, expanding the compressor's minimum speed range presents challenges such as low-speed stable control, internal lubrication, and internal cooling. Moreover, using evaporator cold storage would increase the cost of the evaporator.

[0003] In view of this, the present invention provides an in-vehicle air conditioning system. Utility Model Content

[0004] In view of the problems in the prior art, this utility model provides a vehicle air conditioning system that overcomes the difficulties of the prior art. It can effectively prevent the vehicle air conditioning evaporator from frosting in spring and autumn, avoid frequent start-stop of the compressor, and improve stability, compressor oil return lubrication and cooling effect.

[0005] An embodiment of this utility model provides a vehicle air conditioning system, comprising:

[0006] A vehicle-mounted compressor;

[0007] A bypass valve is connected in parallel between the high-pressure side and the low-pressure side of the on-board compressor;

[0008] A condenser, the first end of which is connected to the high-pressure side of the vehicle compressor;

[0009] An expansion valve, the first end of which is connected to the second end of the condenser;

[0010] An air conditioning evaporator, wherein a first end of the air conditioning evaporator is connected to a second end of an expansion valve, and a second end of the air conditioning evaporator is connected to the low-pressure side of the vehicle compressor;

[0011] A first temperature sensor is disposed at the exhaust end of the vehicle compressor, and the first temperature sensor is connected to the control terminal of the expansion valve; and

[0012] A second temperature sensor is installed inside the evaporator core of the air conditioner evaporator, and the second temperature sensor is connected to the control terminal of the bypass valve.

[0013] Preferably, the bypass valve is configured to adjust its opening based on the difference between the current temperature and the target temperature of the evaporator core, thereby bypassing the refrigerant flow of the on-board compressor.

[0014] Preferably, the expansion valve is configured to adjust its opening degree based on the temperature at the exhaust end of the on-board compressor.

[0015] Preferably, the expansion valve is an electronic expansion valve.

[0016] Preferably, it further includes: a motor and a controller, wherein the motor is connected to the vehicle compressor and the controller respectively.

[0017] The vehicle air conditioning system of this invention can effectively prevent frost formation on the evaporator of the vehicle air conditioner in spring and autumn, avoid frequent start-stop of the compressor, and improve stability, compressor oil return lubrication, and cooling effect. Attached Figure Description

[0018] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings.

[0019] Figure 1 This is a schematic diagram of the piping connection of the vehicle air conditioning system of this utility model.

[0020] Figure 2 This is a schematic diagram of the steps of the vehicle air conditioning system control method of this utility model.

[0021] Figure Labels

[0022] 1. Vehicle-mounted compressor

[0023] 2. Condenser

[0024] 3. Air conditioner evaporator

[0025] 4. Exhaust port

[0026] 5 First temperature sensor

[0027] 6 Second temperature sensor

[0028] 7. Bypass valve

[0029] 8. Expansion valve

[0030] 9 motors

[0031] 10 Controllers Detailed Implementation

[0032] The following specific examples illustrate the implementation methods of this application. Those skilled in the art can easily understand the other advantages and effects of this application from the content disclosed herein. This application can also be implemented or applied through other different specific embodiments, and various details in this application can be modified or changed according to different viewpoints and application systems without departing from the spirit of this application. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0033] The embodiments of this application will now be described in detail with reference to the accompanying drawings, so that those skilled in the art can easily implement the application. This application may be embodied in many different forms and is not limited to the embodiments described herein.

[0034] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics represented in connection with that embodiment or example, which are included in at least one embodiment or example of this application. Furthermore, the specific features, structures, materials, or characteristics represented may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate different embodiments or examples represented in this application, as well as features of different embodiments or examples.

[0035] Furthermore, the terms "first" and "second" are used for illustrative purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the representation of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0036] For the purpose of clearly describing this application, devices that are not relevant to the description are omitted, and the same or similar components throughout the specification are given the same reference numerals.

[0037] Throughout this specification, when it is said that a device is "connected" to another device, this includes not only "direct connection" but also "indirect connection" by placing other components in between. Furthermore, when it is said that a device "comprises" a certain constituent element, unless otherwise stated otherwise, this does not exclude other constituent elements, but rather implies that other constituent elements may be included.

[0038] When we say that a device is "above" another device, this can mean that it is directly above the other device, or it can mean that other devices are present in between. Conversely, when we say that a device is "directly" "above" another device, there are no other devices present in between.

[0039] Although the terms first, second, etc., are used in some instances herein to refer to various elements, these elements should not be limited by these terms. These terms are used only to distinguish one element from another. For example, first interface and second interface, etc., are used. Furthermore, as used herein, the singular forms “a,” “an,” and “the” are intended to also include the plural forms unless the context indicates otherwise. It should be further understood that the terms “comprising,” “including,” indicate the presence of features, steps, operations, elements, components, items, kinds, and / or groups, but do not exclude the presence, occurrence, or addition of one or more other features, steps, operations, elements, components, items, kinds, and / or groups. The terms “or” and “and / or” as used herein are interpreted as inclusive, or mean any one or any combination thereof. Thus, “A, B, or C” or “A, B, and / or C” means “any one of: A; B; C; A and B; A and C; B and C; A, B, and C.” Exceptions to this definition will only occur if the combination of elements, functions, steps, or operations is inherently mutually exclusive in some way.

[0040] The technical terms used herein are for reference only to specific embodiments and are not intended to limit the scope of this application. The singular form used herein includes the plural form unless the statement explicitly indicates otherwise. The word "comprising" as used in the specification means to specify a particular characteristic, region, integer, step, operation, element, and / or component, and does not exclude the presence or addition of other characteristics, regions, integers, steps, operations, elements, and / or components.

[0041] Although not explicitly defined, all terms, including technical and scientific terms used herein, shall have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. Terms defined in commonly used dictionaries shall be further interpreted as having a meaning consistent with the relevant technical literature and the content of this present application, and shall not be over-interpreted as having an ideal or overly formulaic meaning unless otherwise defined.

[0042] Figure 1 This is a schematic diagram of the piping connection of the vehicle air conditioning system according to this utility model. Figure 1As shown, the vehicle air conditioning system of this utility model includes: a vehicle compressor 1, a condenser 2, an air conditioning evaporator 3, a first temperature sensor 5, a second temperature sensor 6, a bypass valve 7, and an expansion valve 8. The bypass valve 7 is connected in parallel between the high-pressure side and the low-pressure side of the vehicle compressor 1. The first end of the condenser 2 is connected to the high-pressure side of the vehicle compressor 1. The first end of the expansion valve 8 is connected to the second end of the condenser 2. The first end of the air conditioning evaporator 3 is connected to the second end of the expansion valve 8, and the second end of the air conditioning evaporator 3 is connected to the low-pressure side of the vehicle compressor 1. The first temperature sensor 5 is located at the exhaust end 4 of the vehicle compressor 1 and is connected to the control end of the expansion valve 8. The second temperature sensor 6 is located inside the evaporator core of the air conditioning evaporator 3 and is connected to the control end of the bypass valve 7. This invention avoids frequent start-stop of the compressor by setting a bypass valve 7 and related pipelines based on the vehicle compressor. The minimum speed of the air conditioning compressor is in the commonly used range of 600-1000 rpm, and the stable control is relatively easy. It helps to improve the internal lubrication effect, internal cooling effect and oil return effect of the compressor body.

[0043] In a preferred embodiment, the bypass valve 7 is configured to adjust its opening based on the difference between the current temperature and the target temperature of the evaporator core to bypass the refrigerant flow of the on-board compressor 1, but is not limited thereto.

[0044] In a preferred embodiment, the expansion valve 8 is configured to adjust its opening based on the temperature of the exhaust end 4 of the on-board compressor 1, but is not limited thereto.

[0045] In a preferred embodiment, the expansion valve 8 is an electronic expansion valve, but is not limited thereto.

[0046] In a preferred embodiment, it further includes a motor 9 and a controller 10, wherein the motor 9 is connected to the vehicle compressor 1 and the controller 10 respectively, but is not limited thereto.

[0047] In a preferred embodiment, the first temperature sensor 5 is connected to the control terminal of the expansion valve 8 via a first electromechanical controller (electromechanical control unit, excluding electronic components), and the opening degree of the expansion valve 8 is adjusted by the mechanical or electromagnetic force provided by the first electromechanical controller. The second temperature sensor 6 is connected to the control terminal of the bypass valve 7 via a second electromechanical controller (electromechanical control unit, excluding electronic components), and the opening degree of the bypass valve 7 is adjusted by the mechanical or electromagnetic force provided by the second electromechanical controller, but this is not limited to this embodiment.

[0048] In a preferred embodiment, the first temperature sensor 5 is integrated with the expansion valve 8, and the opening of the expansion valve 8 is adjusted by an electromechanical structure, but this is not a limitation.

[0049] In a preferred embodiment, the combination of the second temperature sensor 6 and the bypass valve 7 uses an electromechanical structure to adjust the opening of the bypass valve 7, but this is not a limitation.

[0050] In a preferred embodiment, the expansion valve 8 is a first intelligent solenoid valve, and its opening degree is adjusted by temperature data transmitted from the first temperature sensor 5. The bypass valve 7 is a second intelligent solenoid valve, and its opening degree is adjusted by temperature data transmitted from the second temperature sensor 6, but is not limited thereto.

[0051] This invention provides an integrated automotive air conditioning system with a flow bypass function, comprising a compressor bypass valve, an electronic expansion valve, and an exhaust temperature sensor. It can both adjust the bypass valve opening based on the target temperature within the evaporator core to bypass a portion of the refrigerant flow, and adjust the bypass valve opening based on the compressor exhaust temperature. Furthermore, it can intermittently close the bypass valve to increase the refrigerant flow in the evaporator circuit and improve oil return.

[0052] The specific implementation of this utility model is as follows:

[0053] Continue to refer to Figure 1 This utility model discloses an in-vehicle air conditioning system installed in a new energy vehicle. A bypass valve 7 is connected in parallel between the high-pressure and low-pressure sides of the in-vehicle compressor 1. The first end of the condenser 2 is connected to the high-pressure side of the in-vehicle compressor 1. The first end of the expansion valve 8 is connected to the second end of the condenser 2. The first end of the air conditioning evaporator 3 is connected to the second end of the expansion valve 8, and the second end of the air conditioning evaporator 3 is connected to the low-pressure side of the in-vehicle compressor 1. A first temperature sensor 5 is installed at the exhaust end 4 of the in-vehicle compressor 1 and is connected to the control end of the expansion valve 8. A second temperature sensor 6 is installed inside the evaporator core of the air conditioning evaporator 3 and is connected to the control end of the bypass valve 7. This utility model, by setting a bypass valve 7 and related pipelines based on the in-vehicle compressor, avoids frequent compressor start-stop cycles. The minimum speed of the air conditioning compressor is within the commonly used 600-1000 rpm, making stable control easier. It also helps improve the internal lubrication and cooling effects of the compressor body and the oil return effect of the refrigeration system. The bypass valve 7 is configured to adjust its opening based on the difference between the current temperature and the target temperature of the evaporator core (this could be controlled by establishing a proportional relationship between the temperature difference and the opening of the bypass valve 7, but is not limited to this), to bypass the refrigerant flow of the on-board compressor 1. The expansion valve 8 is configured to adjust its opening based on the temperature of the discharge end 4 of the on-board compressor 1 (this could be controlled by establishing a proportional relationship between the temperature of the discharge end 4 and the opening of the expansion valve 8, but is not limited to this). The expansion valve 8 is an electronic expansion valve. The motor 9 is connected to both the on-board compressor 1 and the controller 10.

[0054] When a new energy vehicle using this invention is in operation, during spring and autumn when the air conditioner is running alone, in order to prevent the air conditioner evaporator from frosting and causing the compressor to start and stop frequently, the compressor can operate at its low speed (600-1000 rpm). Furthermore, the opening of the bypass valve is adjusted according to the difference between the target temperature and the current temperature of the evaporator core, bypassing part of the flow of the on-board compressor 1. In addition, the opening of the bypass valve can also be adjusted according to the compressor discharge temperature. By operating the bypass valve 7, the bypass valve can be closed at short intervals (e.g., at short intervals of 10-60 seconds), increasing the refrigerant flow in the evaporator circuit and improving oil return.

[0055] Figure 2 This is a schematic diagram illustrating the steps of the vehicle air conditioning system control method of this utility model. (See attached diagram.) Figure 2 As shown, the control method of the vehicle air conditioning system of this utility model adopts the above-mentioned vehicle air conditioning system (reference). Figure 1 The process includes the following steps:

[0056] S110. Adjust the opening of the bypass valve 7 according to the difference between the current temperature and the target temperature of the evaporator core to bypass the refrigerant flow of the on-board compressor 1.

[0057] S120. Adjust the opening of the expansion valve 8 according to the temperature of the exhaust end 4 of the vehicle compressor 1.

[0058] In a preferred embodiment, steps S110 and S120 are performed simultaneously, but this is not a limitation.

[0059] In a preferred embodiment, the first temperature sensor 5 collects the temperature of the exhaust end 4 of the on-board compressor 1 and sends it to the expansion valve 8; the second temperature sensor 6 collects the temperature inside the evaporator core and sends it to the bypass valve 7, but is not limited thereto.

[0060] The vehicle air conditioning system control method of this utility model can adjust the opening of the bypass valve according to the difference between the target temperature and the current temperature, thereby bypassing the flow of the vehicle compressor 1; and can also adjust the opening of the expansion valve 8 according to the compressor exhaust temperature.

[0061] In summary, the vehicle air conditioning system of this utility model can effectively prevent frost formation on the evaporator of the vehicle air conditioner in spring and autumn, avoid frequent start-stop of the compressor, and improve stability, compressor oil return lubrication, and cooling effect.

[0062] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. A vehicle air conditioning system, characterized in that, include: A vehicle-mounted compressor (1); A bypass valve (7) is connected in parallel between the high-pressure side and the low-pressure side of the on-board compressor (1); A condenser (2), the first end of which is connected to the high-pressure side of the vehicle compressor (1); An expansion valve (8) is provided, the first end of which is connected to the second end of the condenser (2); An air conditioning evaporator (3) is provided, the first end of which is connected to the second end of the expansion valve (8), and the second end of which is connected to the low-pressure side of the vehicle compressor (1). A first temperature sensor (5) is installed at the exhaust end (4) of the vehicle compressor (1), and the first temperature sensor (5) is connected to the control end of the expansion valve (8); as well as A second temperature sensor (6) is installed in the evaporator core of the air conditioner evaporator (3), and the second temperature sensor (6) is connected to the control terminal of the bypass valve (7).

2. The vehicle air conditioning system as described in claim 1, characterized in that, The bypass valve (7) is configured to adjust its opening based on the difference between the current temperature and the target temperature of the evaporator core, so as to bypass the refrigerant flow of the on-board compressor (1).

3. The vehicle air conditioning system as described in claim 1, characterized in that, The expansion valve (8) is configured to adjust the opening degree of the expansion valve (8) based on the temperature of the exhaust end (4) of the on-board compressor (1).

4. The vehicle air conditioning system as described in claim 3, characterized in that, The expansion valve (8) is an electronic expansion valve.

5. The vehicle air conditioning system as described in claim 1, characterized in that, Also includes: A motor (9) and a controller (10) are provided, wherein the motor (9) is connected to the vehicle compressor (1) and the controller (10) respectively.

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