Vehicle-mounted air conditioner integrated with refrigerator and control method of vehicle-mounted air conditioner

Abstract

The invention provides a vehicle-mounted air conditioner integrated with a refrigerator and a control method thereof, and the vehicle-mounted air conditioner integrated with the refrigerator comprises a vehicle-mounted compressor; the bypass valve is connected between the high-pressure side and the low-pressure side of the vehicle-mounted compressor in parallel; the first end of the condenser is communicated with the high-pressure side of the vehicle-mounted compressor; the refrigerator evaporation pipeline and the air conditioner evaporation pipeline are connected between the second end of the condenser and the low-pressure side of the vehicle-mounted compressor in parallel, and the refrigerator evaporation pipeline comprises an expansion valve and a refrigerator evaporator which are connected in series; the first temperature sensor is arranged at the exhaust end of the vehicle-mounted compressor, and the first temperature sensor is connected with the control end of the expansion valve; and the second temperature sensor is arranged in the refrigerator, and the second temperature sensor is connected with the control end of the bypass valve. The compressor can be prevented from being frequently started and stopped, and the stability and the oil return lubrication and cooling effect of the compressor are improved.

Description

Technical Field

[0001] The present invention relates to the field of vehicle-mounted refrigeration equipment, and in particular to a vehicle-mounted air conditioner integrated with a refrigerator and a control method thereof. Background Art

[0002] Existing vehicle refrigerators are independent of the vehicle's existing thermal management system. Due to their numerous components and large dimensions, they require significant space within the vehicle. The cost of a standalone refrigerator compressor is high, their bulk restricts their placement, and their noise impacts passenger compartment comfort. In particular, the heat exchanger's compressor needs to be frequently activated to maintain heat in the glove compartment, increasing vehicle energy consumption and reducing range.

[0003] Even if an ultra-low speed (as low as 100 rpm) air-conditioning compressor is used as a refrigerator compressor, or the compressor is controlled to run intermittently, the following problems still exist in the vehicle refrigerator and air-conditioning system:

[0004] (1) It is difficult to stably control the compressor at extremely low speed;

[0005] (2) The oil supply and lubrication inside the compressor are poor when the compressor speed is very low;

[0006] (3) The internal cooling effect of the compressor is poor when the compressor speed is very low;

[0007] (4) The compressor starts and stops frequently.

[0008] In view of this, the present invention provides a vehicle air conditioner integrated with a refrigerator and a control method thereof. Summary of the Invention

[0009] In response to the problems in the prior art, the present invention provides a vehicle air conditioner with an integrated refrigerator and a control method thereof, which overcomes the difficulties of the prior art, can avoid frequent starting and stopping of the compressor, and improve stability, oil return lubrication of the compressor, and cooling effect.

[0010] An embodiment of the present invention provides a vehicle air conditioner integrated with a refrigerator, comprising:

[0011] a vehicle-mounted compressor;

[0012] a bypass valve connected in parallel between the high-pressure side and the low-pressure side of the onboard compressor;

[0013] a condenser, wherein a first end of the condenser is connected to a high-pressure side of the onboard compressor;

[0014] a refrigerator evaporation line and an air conditioner evaporation line connected in parallel between the second end of the condenser and the low-pressure side of the vehicle-mounted compressor, the refrigerator evaporation line including an electronic expansion valve and a refrigerator evaporator connected in series;

[0015] a first temperature sensor, disposed at the exhaust end of the vehicle-mounted compressor, the first temperature sensor being connected to the control end of the electronic expansion valve; and

[0016] A second temperature sensor is disposed in the refrigerator, and the second temperature sensor is connected to the control end of the bypass valve.

[0017] Preferably, the electronic expansion valve is located downstream of the condenser, and the electronic expansion valve is located upstream of the refrigerator evaporator.

[0018] Preferably, the air-conditioning evaporation pipeline includes a thermal expansion valve and an air-conditioning evaporator connected in series.

[0019] Preferably, the thermal expansion valve is located downstream of the condenser, and the thermal expansion valve is located upstream of the air-conditioning evaporator.

[0020] Preferably, it further comprises: a motor and a controller, wherein the motor is connected to the vehicle-mounted compressor and the controller respectively.

[0021] Preferably, the bypass valve is configured to adjust an opening of the bypass valve based on a difference between a current temperature of the refrigerator and a target temperature so as to bypass the refrigerant of the vehicle-mounted compressor.

[0022] Preferably, the electronic expansion valve is configured to adjust the opening degree of the electronic expansion valve based on the temperature of the exhaust end of the onboard compressor.

[0023] An embodiment of the present invention provides a method for controlling a vehicle air conditioner with an integrated refrigerator, and the method employing the vehicle air conditioner with an integrated refrigerator includes the following steps:

[0024] S110, adjusting the opening of the bypass valve according to the difference between the current temperature of the refrigerator and the target temperature to bypass the refrigerant flow of the vehicle-mounted compressor; and

[0025] S120: Adjust the opening of the electronic expansion valve according to the temperature of the exhaust end of the vehicle-mounted compressor.

[0026] Preferably, step S110 and step S120 are executed synchronously.

[0027] Preferably, the first temperature sensor collects the temperature of the exhaust end of the vehicle-mounted compressor and sends it to the electronic expansion valve.

[0028] Preferably, the second temperature sensor collects the temperature inside the refrigerator and sends it to the bypass valve.

[0029] The vehicle air conditioner with integrated refrigerator and the control method thereof of the present invention can avoid frequent starting and stopping of the compressor, thereby improving stability, oil return lubrication of the compressor, and cooling effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Other features, objects and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings.

[0031] Figure 1 It is a schematic diagram of the pipe connection of the vehicle air conditioner with integrated refrigerator of the present invention.

[0032] Figure 2 It is a schematic diagram of the steps of the vehicle air-conditioning control method of the integrated refrigerator of the present invention.

[0033] Reference numerals

[0034] 1 Car compressor

[0035] 2 Condenser

[0036] 3 Refrigerator evaporator

[0037] 4 Air conditioning evaporator

[0038] 5. First temperature sensor

[0039] 6 Second temperature sensor

[0040] 7 Bypass valve

[0041] 8 Expansion valve

[0042] 9 Thermal expansion valve

[0043] 10 Motor

[0044] 11 Controller

[0045] 12 Refrigerator

[0046] 13 Exhaust port DETAILED DESCRIPTION

[0047] The following describes the embodiments of the present application through specific examples. Those skilled in the art can easily understand the other advantages and effects of the present application from the content disclosed in the present application. The present application can also be implemented or applied through different specific embodiments. The details in the present application can also be modified or changed according to different viewpoints and application systems without departing from the spirit of the present application. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other unless they conflict.

[0048] The following is a detailed description of the embodiments of the present application with reference to the accompanying drawings so that those skilled in the art can easily implement the present application. The present application can be embodied in many different forms and is not limited to the embodiments described herein.

[0049] In the description of this application, reference to the terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of this application. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine and integrate different embodiments or examples described in this application, as well as features of different embodiments or examples, unless otherwise contradictory.

[0050] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include at least one such feature. In the context of this application, "plurality" means two or more, unless otherwise specifically defined.

[0051] In order to clearly describe the present application, components not related to the description are omitted, and the same or similar components throughout the specification are given the same reference numerals.

[0052] Throughout this specification, when a device is said to be "connected" to another device, this includes not only "direct connection" but also "indirect connection" with other elements interposed therebetween. Furthermore, when a device is said to "include" a certain component, unless otherwise stated, this does not exclude the inclusion of other components but rather implies that the device may include other components.

[0053] When a device is said to be "on" another device, it may be directly on the other device, but there may also be other devices between it. In contrast, when a device is said to be "directly on" another device, there are no other devices between it.

[0054] Although the terms first, second, etc. are used in some instances herein to represent various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, the first interface and the second interface, etc. are represented. Furthermore, as used in this article, the singular forms "one," "an," and "the" are intended to also include the plural forms, unless there is a contrary indication in the context. It should be further understood that the terms "comprise," "include," and "include" indicate the presence of features, steps, operations, elements, components, items, types, and / or groups, but do not exclude the presence, occurrence, or addition of one or more other features, steps, operations, elements, components, items, types, and / or groups. The terms "or" and "and / or" used herein are interpreted as inclusive, or mean any one or any combination. Therefore, "A, B, or C" or "A, B, and / or C" means "any of the following: A; B; C; A and B; A and C; B and C; A, B, and C." Exceptions to this definition only occur when the combination of elements, functions, steps, or operations is inherently mutually exclusive in some way.

[0055] The technical terms used herein are intended only to refer to specific embodiments and are not intended to limit this application. The singular form used herein also includes the plural form unless the statement explicitly indicates otherwise. The term "comprising" as used in this specification is intended to specify specific features, regions, integers, steps, operations, elements, and / or components and does not exclude the presence or addition of other features, regions, integers, steps, operations, elements, and / or components.

[0056] Although not defined differently, all terms used herein, including technical and scientific terms, have the same meanings as those generally understood by those skilled in the art to which this application belongs. Terms defined in commonly used dictionaries are to be interpreted as having meanings consistent with the relevant technical literature and current teachings, and unless otherwise defined, they should not be overly interpreted as ideal or highly formalized meanings.

[0057] Figure 1 This is a schematic diagram of the pipe connection of the vehicle air conditioner with integrated refrigerator of the present invention. Figure 1As shown, the vehicle air conditioner with integrated refrigerator of the present invention includes: an on-board compressor 1, a condenser 2, a refrigerator evaporation pipeline, an air conditioner evaporation pipeline, a first temperature sensor 5, a second temperature sensor 6, and a bypass valve 7. The bypass valve 7 is connected in parallel between the high-pressure side and the low-pressure side of the on-board compressor 1. The first end of the condenser 2 is connected to the high-pressure side of the on-board compressor 1. The refrigerator evaporation pipeline and the air conditioner evaporation pipeline are connected in parallel between the second end of the condenser 2 and the low-pressure side of the on-board compressor 1. The refrigerator evaporation pipeline includes an expansion valve 8 and a refrigerator evaporator 3 connected in series. The first temperature sensor 5 is arranged at the exhaust end 13 of the on-board compressor 1 and is connected to the control end of the expansion valve 8. The second temperature sensor 6 is arranged in the refrigerator 12 and is connected to the control end of the bypass valve 7. The present invention sets a bypass valve 7 and related pipelines based on the vehicle-mounted compressor, so that the refrigerant flow passing through the vehicle-mounted compressor 1 can be adjusted at all times, avoiding frequent start and stop of the compressor. The minimum speed of the air-conditioning compressor is controlled at the commonly used 600 to 1000 rpm, and stable control is relatively easy; it helps to improve the internal lubrication effect and internal cooling effect of the compressor body and the improvement of the oil return effect of the refrigeration system.

[0058] In a preferred embodiment, the expansion valve 8 is located downstream of the condenser 2 , and the expansion valve 8 is located upstream of the refrigerator evaporator 3 , but the present invention is not limited thereto.

[0059] In a preferred embodiment, the air conditioning evaporation pipeline includes a thermal expansion valve 9 and an air conditioning evaporator 4 connected in series, but is not limited thereto.

[0060] In a preferred embodiment, thermal expansion valve 9 is located downstream of condenser 2 and upstream of air conditioner evaporator 4. The thermal expansion valve controls its opening based on the superheat of the gaseous refrigerant at the evaporator outlet, making it widely applicable to partially flooded evaporators. Thermal expansion valves can be categorized as internally balanced or externally balanced, depending on their balancing method, but are not limited thereto.

[0061] In a preferred embodiment, the vehicle further comprises: a motor 10 and a controller 11 , wherein the motor 10 is connected to the vehicle compressor 1 and the controller 11 respectively, but the present invention is not limited thereto.

[0062] In a preferred embodiment, the bypass valve 7 is configured to adjust the opening of the bypass valve 7 based on the difference between the current temperature of the refrigerator 12 and the target temperature to bypass the refrigerant flow of the vehicle compressor 1, but is not limited thereto.

[0063] In a preferred embodiment, the expansion valve 8 is configured to adjust the opening of the expansion valve 8 based on the temperature of the exhaust end 13 of the vehicle-mounted compressor 1 , but the present invention is not limited thereto.

[0064] In a preferred embodiment, the expansion valve 8 may be an electronic expansion valve, but is not limited thereto.

[0065] In a preferred embodiment, the first temperature sensor 5 is connected to the control end of the expansion valve 8 via a first electromechanical controller (electromechanical control unit, not including electronic components), and the opening of the expansion valve 8 is adjusted by the mechanical force or electromagnetic force provided by the first electromechanical controller. The second temperature sensor 6 is connected to the control end of the bypass valve 7 via a second electromechanical controller (electromechanical control unit, not including electronic components), and the opening of the bypass valve 7 is adjusted by the mechanical force or electromagnetic force provided by the second electromechanical controller, but the present invention is not limited to this.

[0066] 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 through an electromechanical structure, but the present invention is not limited thereto.

[0067] In a preferred embodiment, the second temperature sensor 6 is integrated with the bypass valve 7 , and the opening of the bypass valve 7 is adjusted by an electromechanical structure, but the present invention is not limited thereto.

[0068] In a preferred embodiment, expansion valve 8 is a first intelligent solenoid valve, and its opening is adjusted based on temperature data transmitted by first temperature sensor 5. Bypass valve 7 is a second intelligent solenoid valve, and its opening is adjusted based on temperature data transmitted by second temperature sensor 6, but the present invention is not limited thereto.

[0069] The present invention provides a flow bypass type automobile air conditioning system with integrated refrigerator function, which is equipped with a compressor bypass valve, a refrigerator EXV valve (EXV valve usually refers to an electronic expansion valve, Electronic Expansion Valve, EXV valve is a throttling control element with a preset program, which controls the voltage or current applied to the expansion valve through the electrical signal generated by the adjusted parameter, thereby achieving the purpose of regulating the liquid supply. In the refrigeration system, the EXV valve is the core control element in the refrigeration cycle, which can dynamically adjust the refrigerant flow to meet the needs of different working conditions.) and an exhaust temperature sensor. It can bypass part of the flow by adjusting the bypass valve opening according to the target temperature of the refrigerator 12; it can also adjust the refrigerator EXV opening according to the compressor exhaust temperature. The bypass valve can also be closed for a short period of time to increase the refrigerant flow in the refrigerator evaporator circuit and improve oil return.

[0070] The specific implementation of the present invention is as follows:

[0071] Continue to refer Figure 1The vehicle air conditioner with an integrated refrigerator of the present invention is installed in a new energy vehicle. A bypass valve 7 is connected in parallel between the high-pressure and low-pressure sides 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 refrigerator evaporation line and the air conditioner evaporation line are connected in parallel between the second end of the condenser 2 and the low-pressure side of the vehicle compressor 1. The refrigerator evaporation line includes an expansion valve 8 and a refrigerator evaporator 3 connected in series. A first temperature sensor 5 is installed at the exhaust port 13 of the vehicle compressor 1 and is connected to the control terminal of the expansion valve 8. A second temperature sensor 6 is installed in the refrigerator 12 and is connected to the control terminal of the bypass valve 7. The expansion valve 8 is located downstream of the condenser 2 and upstream of the refrigerator evaporator 3. The air conditioner evaporation line includes a thermal expansion valve 9 and an air conditioner evaporator 4 connected in series. The thermal expansion valve 9 is located downstream of the condenser 2 and upstream of the air conditioner evaporator 4. A motor 10 is connected to the vehicle compressor 1 and a controller 11, respectively. The bypass valve 7 is configured to adjust the opening of the bypass valve 7 based on the difference between the current temperature of the refrigerator 12 and the target temperature (control can be performed by establishing a proportional relationship between the difference and the opening of the bypass valve 7, but is not limited to this), thereby bypassing the refrigerant of the vehicle-mounted compressor 1. The expansion valve 8 is configured to adjust the opening of the expansion valve 8 based on the temperature of the exhaust end 13 of the vehicle-mounted compressor 1 (control can be performed by establishing a proportional relationship between the temperature of the exhaust end 13 and the opening of the expansion valve 8, but is not limited to this).

[0072] When the new energy vehicle using the present invention is driving, when the refrigerator 12 works alone, the compressor can operate at its low speed (600-1000rpm); and, the bypass valve opening is adjusted according to the difference between the target temperature and the current temperature of the refrigerator 12 to bypass part of the flow of the vehicle compressor 1; and, the refrigerator EXV opening can also be adjusted according to the compressor exhaust temperature; by operating the bypass valve 7, the bypass valve can be closed at short intervals, thereby increasing the refrigerant flow in the refrigerator evaporator circuit and improving oil return.

[0073] Figure 2 Schematic diagram of the steps of the vehicle air conditioning control method of the integrated refrigerator of the present invention. Figure 2 As shown, the control method of the vehicle air conditioner with integrated refrigerator of the present invention adopts the vehicle air conditioner with integrated refrigerator (refer to Figure 1 ), including the following steps:

[0074] S110, collecting the temperature of the refrigerator 12, and adjusting the opening of the bypass valve 7 according to the difference between the current temperature of the refrigerator 12 and the target temperature to bypass the refrigerant flow of the vehicle-mounted compressor 1;

[0075] S120 , collecting the temperature of the exhaust end 13 of the vehicle-mounted compressor 1 , and adjusting the opening of the expansion valve 8 according to the temperature of the exhaust end 13 of the vehicle-mounted compressor 1 .

[0076] In a preferred embodiment, step S110 and step S120 are executed synchronously, but the present invention is not limited thereto.

[0077] In a preferred embodiment, the first temperature sensor 5 collects the temperature of the exhaust end 13 of the vehicle-mounted compressor 1 and sends the temperature to the expansion valve 8 , but the present invention is not limited thereto.

[0078] In a preferred embodiment, the second temperature sensor 6 collects the temperature inside the refrigerator 12 and sends it to the bypass valve 7, but the present invention is not limited thereto.

[0079] The vehicle air conditioning control method of the integrated refrigerator of the present invention can adjust the bypass valve opening according to the difference between the refrigerator target temperature and the current temperature, bypassing part of the flow of the vehicle compressor 1; and can also adjust the refrigerator EXV opening according to the compressor exhaust temperature.

[0080] In summary, the vehicle air conditioner with integrated refrigerator and the control method thereof of the present invention can avoid frequent starting and stopping of the compressor, improve stability, oil return lubrication of the compressor, and cooling effect.

[0081] The above is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific implementation of the present invention should not be considered to be limited to these descriptions. For those skilled in the art of the present invention, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should be considered to fall within the scope of protection of the present invention.

Claims

1. A vehicle air conditioner with integrated refrigerator, characterized in that: include: a vehicle-mounted compressor (1); a bypass valve (7) connected in parallel between the high-pressure side and the low-pressure side of the vehicle-mounted compressor (1); a condenser (2), a first end of the condenser (2) being connected to the high-pressure side of the vehicle-mounted compressor (1); A refrigerator evaporation pipeline and an air conditioner evaporation pipeline are connected in parallel between the second end of the condenser (2) and the low-pressure side of the vehicle-mounted compressor (1), and the refrigerator evaporation pipeline includes an expansion valve (8) and a refrigerator evaporator (3) connected in series; a first temperature sensor (5) disposed at the exhaust end (13) of the vehicle-mounted compressor (1), the first temperature sensor (5) being connected to the control end of the expansion valve (8); as well as A second temperature sensor (6) is provided in the refrigerator (12), and the second temperature sensor (6) is connected to the control end of the bypass valve (7).

2. The vehicle air conditioner with integrated refrigerator according to claim 1, characterized in that: The expansion valve (8) is located downstream of the condenser (2), and the expansion valve (8) is located upstream of the refrigerator evaporator (3).

3. The vehicle air conditioner with integrated refrigerator according to claim 1, characterized in that: The air-conditioning evaporation pipeline comprises a thermal expansion valve (9) and an air-conditioning evaporator (4) connected in series.

4. The vehicle air conditioner with integrated refrigerator according to claim 3, characterized in that: The thermal expansion valve (9) is located downstream of the condenser (2), and the thermal expansion valve (9) is located upstream of the air-conditioning evaporator (4).

5. The vehicle air conditioner with integrated refrigerator according to claim 1, characterized in that: Also includes: A motor (10) and a controller (11), wherein the motor (10) is connected to the vehicle-mounted compressor (1) and the controller (11) respectively.

6. The vehicle air conditioner with integrated refrigerator according to any one of claims 1 to 5, characterized in that: The bypass valve (7) is configured to adjust the opening of the bypass valve (7) based on the difference between the current temperature of the refrigerator and the target temperature, so as to bypass the refrigerant of the vehicle-mounted compressor (1).

7. The vehicle air conditioner with integrated refrigerator according to any one of claims 1 to 5, 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 (13) of the vehicle-mounted compressor (1).

8. A method for controlling a vehicle air conditioner integrated with a refrigerator, characterized in that: The vehicle air conditioner using the integrated refrigerator according to claim 1 comprises the following steps: S110, adjusting the opening of the bypass valve (7) according to the difference between the current temperature of the refrigerator (12) and the target temperature to bypass the refrigerant flow of the vehicle-mounted compressor (1); S120, adjusting the opening of the expansion valve (8) according to the temperature of the exhaust end (13) of the vehicle-mounted compressor (1).

9. The method for controlling a vehicle air conditioner integrated with a refrigerator according to claim 8, wherein: The step S110 and the step S120 are executed synchronously.

10. The control method of a vehicle air conditioner integrated with a refrigerator according to claim 8, characterized in that: The first temperature sensor (5) collects the temperature of the exhaust end (13) of the vehicle-mounted compressor (1) and sends it to the expansion valve (8); the second temperature sensor (6) collects the temperature inside the refrigerator and sends it to the bypass valve (7).

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