Compressor with internal automatic unloading function and new energy automobile
By introducing a scroll pump assembly into the compressor and using a motor that rotates in the opposite direction, the problems of slow high and low pressure balancing and liquid refrigerant migration after the compressor stops are solved, achieving rapid balancing and smooth start-up, reducing noise, saving costs, and improving energy recovery efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-11
- Publication Date
- 2026-03-03
AI Technical Summary
Existing compressors have a long time to reach high and low pressure equilibrium after shutdown, and the migration of liquid refrigerant makes starting difficult. During startup, the load is high and the noise is loud, which affects the passenger experience.
The compressor uses an internal automatic unloading mechanism. It utilizes a scroll pump assembly and a motor to drive the scroll plate to rotate in the opposite direction. The reverse rotation of the scroll plate achieves rapid balance between high and low pressures. After shutdown, it switches to expander mode and uses the motor to generate electricity or a heating resistor to recover energy.
It achieves rapid balance of high and low pressures after the compressor stops, reduces liquid refrigerant migration, ensures smooth compressor start-up, reduces start-up noise, saves costs, and improves energy recovery efficiency.
Smart Images
Figure CN223964591U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of vehicle-mounted refrigeration equipment, specifically to an internally automatic unloading compressor and new energy vehicles. Background Technology
[0002] Figure 1 This is a schematic diagram of the principle of a compressor using existing technology. For example... Figure 1 As shown, the existing compressor mainly includes: condenser 1, evaporator 2, thermostatic expansion valve 3, compressor 4, motor 41, and discharge valve plate 8. The discharge valve plate 8 (one-way) is built into the compressor 4. Currently, after the compressor stops, due to the one-way function of the discharge valve plate 8 inside the compressor, the high and low pressures can only be balanced through the expansion valve, which takes a relatively long time. Moreover, due to the working principle of the expansion valve, liquid refrigerant migration can occur, thus hindering the compressor from restarting in a short time. This is mainly manifested in the following ways:
[0003] (1) The high and low pressure balancing process takes a long time, and the compressor is difficult to start when it restarts due to the large pressure difference and the large starting load.
[0004] (2) When the liquid refrigerant migrates to the low-pressure side, the compressor will carry more liquid during the suction when it starts up again, which will cause liquid slugging, resulting in start-up vibration or even failure.
[0005] (3) When restarting, abnormal noises and whistling are likely to occur, affecting the in-vehicle riding experience of vehicles using this compressor.
[0006] To overcome the above problems, existing compressors mainly adopt the following solutions.
[0007] (1) The compressor has enhanced starting capability, but the corresponding disadvantage is increased cost. Moreover, the compressor body is subjected to great stress during startup.
[0008] (2) Adding a high- or low-pressure bypass unloading valve to the refrigeration system or compressor body will also increase costs.
[0009] In view of this, the present invention provides a compressor with internal automatic unloading and a new energy vehicle. Utility Model Content
[0010] In response to the problems in the prior art, this utility model provides an internally automatic unloading compressor and a new energy vehicle, which overcomes the difficulties of the prior art, enables the high and low pressures to be quickly balanced after the compressor stops, reduces the migration of liquid refrigerant, and ensures a smooth restart of the compressor.
[0011] An embodiment of this utility model provides an internally automatic unloading compressor, comprising:
[0012] A sealed housing contains a scroll pump assembly and a motor, one above the other, positioned at the top and bottom of its inner cavity. The motor drives the scroll plate within the scroll pump assembly to rotate clockwise, compressing the refrigerant. The cylinder exhaust port of the scroll pump assembly is always connected to the high-pressure side of the compressor and the scroll plate.
[0013] A controller is connected to the motor. When the compressor stops, the gas on the high-pressure side expands to the low-pressure side through the scroll plate, driving the scroll plate to rotate in the opposite direction to drive the motor to generate electricity and send it to the controller.
[0014] Preferably, when the compressor stops, the gas on the high-pressure side flows back into the scroll plate through the cylinder exhaust port, pushing the scroll plate to reverse.
[0015] Preferably, the vortex disk stops rotating only after the air pressure on the high-pressure side is balanced with the air pressure on the low-pressure side.
[0016] Preferably, it further includes a power supply module and an energy storage module;
[0017] The controller is connected to the power supply module and receives power from the power supply module to drive the motor to rotate;
[0018] When the compressor stops, the controller connects to the energy storage module and transmits the electricity generated by the motor to the energy storage module until the motor stops generating electricity.
[0019] Preferably, the system further includes a battery pack, and the controller is connected to the battery pack. When the compressor is working, the controller receives power from the power supply module to drive the motor to rotate; when the compressor stops, the controller sends the power generated by the motor to the battery pack until the scroll plate stops rotating.
[0020] Preferably, it further includes: a heating resistor connected to the controller.
[0021] Preferably, it further includes:
[0022] A condenser connected to the high-pressure side of the compressor;
[0023] An evaporator is connected to the low-pressure side of the compressor;
[0024] A thermostatic expansion valve is connected at both ends to the condenser and the evaporator, respectively.
[0025] Preferably, the rotational speed and power of the motor during power generation are positively correlated with the pressure difference between the high and low pressure sides when the compressor stops.
[0026] The rotational speed and power of the electric motor are inversely related to the target time for pressure balance after the compressor stops.
[0027] An embodiment of this utility model also provides a compressor, including the above-described internally automatic unloading compressor, wherein the power generated by the motor is transmitted to the vehicle-mounted battery pack for charging.
[0028] An embodiment of this utility model also provides an energy recovery method, characterized in that the above-mentioned new energy vehicle includes the following steps:
[0029] S110, The battery pack supplies power to the motor, and the motor drives the scroll plate in the scroll pump body assembly to rotate forward to compress the refrigerant;
[0030] S120. After the motor stops, it enters expander mode. The gas on the high-pressure side enters the scroll plate through the cylinder exhaust port, pushing the scroll plate to reverse, thus transmitting the electricity generated by the motor to the battery pack; and
[0031] S130. The compressor enters the shutdown mode until the scroll plate stops rotating.
[0032] The internally automatic unloading compressor of this invention, as well as its application in new energy vehicles, enables rapid balancing of high and low pressures after compressor shutdown, reduces liquid refrigerant migration, and ensures smooth compressor restart. Attached Figure Description
[0033] 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.
[0034] Figure 1 This is a schematic diagram of the principle of a compressor using existing technology.
[0035] Figure 2 This is a schematic diagram illustrating the working principle of the first type of internally automatic unloading compressor of this utility model.
[0036] Figure 3 This is a schematic diagram illustrating the working principle of the second type of internally automatic unloading compressor of this utility model.
[0037] Figure 4 This is a flowchart of the energy recovery method of this utility model.
[0038] Figure 5 This is the conversion process of the three working modes in the energy recovery method of this utility model.
[0039] Figure Labels
[0040] 1. Condenser
[0041] 2 Evaporator
[0042] 3. Thermal expansion valve
[0043] 4. Compressor
[0044] 41 Motor
[0045] 42 Controller
[0046] 5 Power Supply Module
[0047] 6 Energy Storage Modules
[0048] 7 Battery Pack
[0049] 8. Exhaust valve plate Detailed Implementation
[0050] 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.
[0051] 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.
[0052] 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.
[0053] 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.
[0054] To clearly illustrate this application, devices unrelated to the description are omitted, and the same or similar constituent elements throughout the specification are given the same reference numerals.
[0055] 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.
[0056] 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.
[0057] 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.
[0058] 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.
[0059] 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.
[0060] Figure 2 This is a schematic diagram illustrating the working principle of the first type of internally automatic unloading compressor of this utility model. Figure 2 As shown, the first type of internally automatic unloading compressor of this utility model includes: a sealed housing and a controller 42. A scroll pump assembly and a motor 41 are respectively arranged at the top and bottom of the inner cavity of the sealed housing. The motor 41 drives the scroll plate in the scroll pump assembly to rotate forward to compress the refrigerant. The cylinder exhaust port of the scroll pump assembly is always connected to the high-pressure side of the compressor 4 and the scroll plate. The controller 42 is connected to the motor 41. When the compressor 4 stops, the gas on the high-pressure side expands to the low-pressure side through the scroll plate (in this utility model, the high-pressure side and low-pressure side are relative concepts, indicating the side with higher gas pressure inside the compressor is the high-pressure side, and the side with lower gas pressure is the low-pressure side), driving the scroll plate to rotate in the opposite direction to drive the motor 41 to generate electricity, which is then transmitted to the controller 42. In this process, the pressure difference between the high-pressure side and the low-pressure side is first converted into mechanical energy to drive the scroll plate. The rotation of the scroll plate drives the motor to rotate in the opposite direction, and then the mechanical energy is converted into electrical energy, achieving pressure balance inside the compressor. This utility model relates to an internal unloading mechanism and method. By eliminating the built-in exhaust valve plate that prevents reverse rotation when the compressor stops, the mechanism switches from compressor working mode to expander working mode when the compressor stops. This allows for rapid balance of high and low pressures after the compressor stops, reduces liquid refrigerant migration, and ensures smooth compressor restart.
[0061] In a preferred embodiment, when the compressor 4 stops, the gas on the high-pressure side flows back into the scroll plate through the cylinder exhaust port, pushing the scroll plate to reverse, but this is not a limitation.
[0062] In a preferred embodiment, the vortex disk stops rotating only after the air pressure on the high-pressure side is balanced with that on the low-pressure side, but this is not a limitation.
[0063] In a preferred embodiment, it further includes a power supply module 5 and an energy storage module 6.
[0064] The controller 42 is connected to the power supply module 5 and receives power from the power supply module 5 to drive the motor 41 to rotate.
[0065] When compressor 4 stops, controller 42 connects to energy storage module 6 and transmits the power generated by motor 41 to energy storage module 6 until motor 41 stops generating power, but this is not the limit.
[0066] In a preferred embodiment, it further includes: a heating resistor connected to the controller 42, but is not limited thereto.
[0067] In a preferred embodiment, it further includes:
[0068] A condenser 1 is connected to the high-pressure side of the compressor 4.
[0069] An evaporator 2 is connected to the low-pressure side of the compressor 4.
[0070] A thermostatic expansion valve 3 is connected at both ends to the condenser 1 and the evaporator 2, but is not limited to this.
[0071] In a preferred embodiment, the rotational speed and power of the motor 41 during power generation are positively correlated with the pressure difference between the high and low pressure sides when the compressor 4 stops. The rotational speed and power of the motor 41 during power generation are negatively correlated with the target pressure balance time after the compressor 4 stops, but this is not a limitation.
[0072] Compared with the existing compressor structure, this utility model reduces the exhaust valve plate component in terms of hardware, but adds an expander working mode in terms of software and usage process (reducing hardware components and adding a new working stage in software) to replace the function of the exhaust valve plate. It also makes full use of the kinetic energy generated by the reverse rotation of the scroll plate for energy recovery, breaking through the classic structure of existing compressors. It is especially suitable for use scenarios such as new energy vehicles that require frequent start-stop, have extreme requirements for the overall size of the machine, and emphasize energy recovery.
[0073] When the compressor of this invention stops, it switches from compressor mode to expander mode, and the motor controller switches the motor from electric motor mode to generator mode. High-pressure side gas expands to the low-pressure side via a scroll plate, simultaneously driving the scroll plate to rotate in the opposite direction, which in turn drives the motor to run in reverse to generate electricity. The electrical energy generated by the motor is fed back to the power supply system through the motor controller or used to generate heat through a power resistor. The motor speed and power in generator mode are calibrated based on parameters such as the high and low pressure difference at the time of compressor shutdown and the required pressure balance time. When the scroll plate speed drops to 0, the compressor switches to shutdown mode.
[0074] After the compressor of this invention stops, the pressure difference quickly balances, and the migration of liquid refrigerant is minimal, making it easy to restart the compressor with minimal vibration and noise during startup. This invention saves on the cost of the discharge valve plate and avoids the slapping noise of the discharge valve plate during compressor gas compression. It also avoids the stringent requirements placed on the discharge valve plate under harsh operating conditions. Furthermore, some energy can be recovered during the compressor shutdown process.
[0075] Figure 3 This is a schematic diagram illustrating the working principle of the second type of internally automatic unloading compressor of this utility model. The new energy vehicle of this utility model includes the aforementioned compressor 4 (as shown). Figure 3 As shown, the electricity generated by motor 41 is transmitted to the on-board battery pack 7 for charging. Controller 42 is connected to battery pack 7. When compressor 4 is working, it receives power from power supply module 5 to drive motor 41 to rotate. When compressor 4 stops, it transmits the electricity generated by motor 41 to battery pack 7 until the scroll plate stops rotating, thereby further improving the range of the new energy vehicle.
[0076] Figure 4 This is a flowchart of the energy recovery method of this utility model. For example... Figure 4 As shown, the energy recovery method of this utility model, using the aforementioned new energy vehicle, includes the following steps:
[0077] S110 and battery pack 7 supply power to motor 41, which drives the scroll plate in the scroll pump body assembly to rotate forward to compress the refrigerant.
[0078] After S120 and motor 41 stop, they enter expander mode. The gas on the high-pressure side flows back into the scroll plate through the cylinder exhaust port, pushing the scroll plate to reverse and transmitting the electricity generated by motor 41 to battery pack 7.
[0079] as well as
[0080] S130. Compressor 4 enters shutdown mode until the scroll plate stops rotating.
[0081] Figure 5 This describes the switching process for the three operating modes in the energy recovery method of this utility model. (Reference) Figure 5 As shown, the scroll compressor of this invention has three operating modes: compressor operating mode, expander operating mode, and shutdown mode. The shutdown process of the scroll compressor includes compressor operating mode → expander operating mode → shutdown mode. In expander operating mode, the gas pressure difference drives the scroll disc to reverse, quickly balancing the high and low pressure differences, and simultaneously recovering some energy through the motor controller.
[0082] In summary, the internally automatic unloading compressor of this invention, as well as new energy vehicles, enables rapid balancing of high and low pressures after the compressor stops, reduces liquid refrigerant migration, and ensures smooth compressor restart.
[0083] 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 hermetically sealed compressor characterized by comprising: The application relates to a compressor (4) comprising: a closed shell, an inner cavity of the closed shell being provided with a scroll pump body assembly and a motor (41) at the top and bottom respectively, the motor (41) driving the scroll disc in the scroll pump body assembly to compress refrigerant in a forward rotation mode, a cylinder exhaust hole of the scroll pump body assembly being always connected with a high-pressure side and a scroll disc of the compressor (4); and a controller (42) connected with the motor (41), when the compressor (4) stops, the gas in the high-pressure side flows back into the scroll disc through the cylinder exhaust hole, and drives the scroll disc to rotate reversely to drive the motor (41) to generate electricity and deliver the electricity to the controller (42).
2. The internally self-unloading compressor of claim 1, wherein, When the compressor (4) stops, the gas in the high-pressure side flows back into the scroll disc through the cylinder exhaust hole, and drives the scroll disc to rotate reversely.
3. The internally self-unloading compressor of claim 1, wherein, Until the pressure in the high-pressure side is balanced with the pressure in the low-pressure side, the scroll disc stops rotating.
4. The internally self-unloading compressor of claim 2, wherein, The application further comprises a power supply module (5) and an energy storage module (6); the controller (42) is connected with the power supply module (5) and receives power supply of the power supply module (5) to drive the motor (41) to rotate; when the compressor (4) stops, the controller (42) is connected with the energy storage module (6) and delivers the electricity generated by the motor (41) to the energy storage module (6) until the motor (41) stops generating electricity.
5. The internally self-unloading compressor of claim 4, wherein, The application further comprises a battery pack (7), the controller (42) is connected with the battery pack (7), when the compressor (4) works, the controller (42) receives power supply of the power supply module (5) to drive the motor (41) to rotate; when the compressor (4) stops, the controller (42) delivers the electricity generated by the motor (41) to the battery pack (7) until the scroll disc stops rotating.
6. The internally self-unloading compressor of claim 1, wherein, The application further comprises: a heating resistor connected with the controller (42).
7. The internally self-unloading compressor of claim 1, wherein, The application further comprises: a condenser (1) connected with the high-pressure side of the compressor (4); an evaporator (2) connected with the low-pressure side of the compressor (4); a thermal expansion valve (3) having two ends connected with the condenser (1) and the evaporator (2) respectively.
8. The internally self-unloading compressor of claim 1, wherein, The rotation speed and power of the motor (41) generating electricity are in a positive relationship with the pressure difference between the high-pressure side and the low-pressure side when the compressor (4) stops; the rotation speed and power of the motor (41) generating electricity are in an inverse relationship with the target time length of pressure balance after the compressor (4) stops.
9. A new energy vehicle, characterized in that, The application relates to a compressor (4) comprising: the electricity generated by the motor (41) is transmitted to a battery pack (7) on a vehicle to be charged.