阅读说明：本技术 一种热泵电动涡旋压缩机及其补气增焓方法 (Heat pump electric scroll compressor and air supplementing and enthalpy increasing method thereof ) 是由 李康 李芳芳 朱子宇 于 2020-12-30 设计创作，主要内容包括：一种热泵电动涡旋压缩机及其补气增焓方法,其中压缩机包括密封外壳和控制器,密封外壳的左右两端分别设有低、高压排气口；密封外壳内靠近低压进气口的一侧固定设有受控于控制器的电机定子,电机定子的内腔套设有电机转子,电机转子的内腔固定连接有转子主轴；密封外壳内靠近高压排气口的一侧固定设有静涡旋盘,静涡旋盘的涡旋部内设有与该涡旋部啮合旋接的动涡旋盘；涡旋压缩腔与电机腔通过过气孔连通；转子主轴穿过花盘与动涡旋盘连接,动涡旋盘由转子主轴驱动旋转；密封外壳上还设有喷气增焓口,喷气增焓口穿过静涡旋盘的外壁与涡旋压缩腔连通。本发明结构简单、可靠性高、能效比高,很好地现了热泵空调在低温下的补气增焓功能。(A heat pump electric vortex compressor and a gas-supplying enthalpy-increasing method thereof are provided, wherein the compressor comprises a sealed shell and a controller, and the left end and the right end of the sealed shell are respectively provided with a low-pressure exhaust port and a high-pressure exhaust port; a motor stator controlled by a controller is fixedly arranged on one side, close to the low-pressure air inlet, in the sealed shell, an inner cavity of the motor stator is sleeved with a motor rotor, and an inner cavity of the motor rotor is fixedly connected with a rotor spindle; a static vortex disk is fixedly arranged on one side, close to the high-pressure exhaust port, in the sealed shell, and a movable vortex disk meshed and spirally connected with the vortex part is arranged in the vortex part of the static vortex disk; the vortex compression cavity is communicated with the motor cavity through an air hole; the rotor main shaft penetrates through the faceplate to be connected with the movable scroll plate, and the movable scroll plate is driven to rotate by the rotor main shaft; and the seal shell is also provided with an enhanced vapor injection port which penetrates through the outer wall of the fixed scroll plate and is communicated with the scroll compression cavity. The invention has simple structure, high reliability and high energy efficiency ratio, and well realizes the air-supplementing and enthalpy-increasing functions of the heat pump air conditioner at low temperature.)

1. A heat pump electric scroll compressor is characterized by comprising a sealed shell and a controller, wherein a low-pressure air inlet and a high-pressure air outlet are respectively arranged at the left end and the right end of the sealed shell; a motor stator controlled by the controller is fixedly arranged on one side, close to the low-pressure air inlet, in the sealed shell, a motor rotor is sleeved in an inner cavity of the motor stator, and a rotor spindle is fixedly connected to the inner cavity of the motor rotor; a fixed scroll is fixedly arranged on one side, close to the high-pressure exhaust port, in the sealed shell, and a movable scroll meshed and spirally connected with the scroll part is arranged in the scroll part of the fixed scroll; the fixed scroll is provided with a face plate for covering the movable scroll, the face plate and the fixed scroll enclose a scroll compression cavity for the movable scroll to rotate, the side where the motor rotor is located is a motor cavity, the face plate is provided with an air passing hole, and the scroll compression cavity is communicated with the motor cavity through the air passing hole; the rotor main shaft penetrates through the faceplate to be connected with the movable scroll plate, and the movable scroll plate is driven to rotate by the rotor main shaft; the sealed shell is also provided with an enhanced vapor injection port, the enhanced vapor injection port penetrates through the outer wall of the fixed scroll and is communicated with the scroll compression cavity, and the enhanced vapor injection port is used for being connected with an enhanced vapor pipeline on an external economizer.

2. The heat pump electric scroll compressor of claim 1, wherein the hermetic shell, motor stator, motor rotor, and rotor spindle combine to form a permanent magnet synchronous motor, the motor stator having coils wound thereon, the motor rotor being a permanent magnet without coils.

3. The heat pump electric scroll compressor of claim 1, wherein the faceplate and the hermetic shell each have a bearing, one end of the rotor shaft is fixedly connected to the bearing on the faceplate, and the other end of the rotor shaft is fixedly connected to the bearing on the hermetic shell.

4. The heat pump electric scroll compressor of claim 1, wherein the hermetic shell comprises a main shell and an end cover, wherein one end of the main shell is open, the end cover is hermetically connected to the open of the main shell, the high pressure exhaust port is disposed on the end cover, and the low pressure intake port is disposed at one end of the main shell away from the end cover.

5. The heat pump electric scroll compressor of claim 4, wherein the fixed scroll is fitted at the opening of the main shell and abuts against an inner side of the end cap.

6. The heat pump electric scroll compressor of claim 4, wherein a check valve is provided in an enthalpy addition line between the enhanced vapor injection port and the economizer.

7. The heat pump electric scroll compressor according to any one of claims 1 to 6, wherein the controller is integrally fixedly provided on an outer wall of the hermetic shell.

8. A method for increasing enthalpy of an electric scroll compressor of a heat pump according to any one of claims 1 to 7, comprising the following steps.

S101, starting a controller, wherein a motor stator is electrified and conducted with an external power supply under the control of the controller to generate a rotating magnetic field acting on a motor rotor, and the electronic rotor drives a movable scroll to rotate together under the action of magnetic force;

s102, communicating an evaporator which provides first refrigerant gas to the outside through a low-pressure gas inlet, performing vortex compression on gas in a vortex compression cavity through the interaction of meshed vortex parts between a rotating movable vortex disc and a fixed vortex disc, and generating negative pressure through the vortex compression to enable the first refrigerant gas to be sucked into the vortex compression cavity through a motor cavity;

s103, opening a one-way valve on the enthalpy-increasing pipeline, conducting an economizer of second refrigerant gas provided from the outside and the enthalpy-increasing port in a one-way mode, and supplementing the second refrigerant gas into the vortex compression cavity through the enthalpy-increasing port;

and S104, the movable scroll operates to mix and compress the first refrigerant gas and the second refrigerant gas in the scroll compression cavity, and then the mixed gas is ejected from the high-pressure exhaust port.

9. The enthalpy adding method according to claim 8, wherein a flow regulating valve is further provided on the enthalpy adding pipeline, and the flow regulating valve is controlled by the controller.

Technical Field

The invention relates to the technical field of compressors, in particular to a heat pump electric scroll compressor and an air supplementing and enthalpy increasing method thereof.

Background

The heat of the heating air conditioner of the conventional vehicle is generally provided by the heat discharged from the engine, however, in the new energy vehicle, the heat in the vehicle at a low temperature is provided by an additional heating device due to the elimination of the engine. At present, most new energy vehicle types adopt PTC heating devices, but the PTC heating efficiency is low, so that the endurance mileage of the vehicle in winter is reduced by about 30%. And thus the need to improve the efficiency of the heating apparatus is increasingly pressing. The heat pump air conditioner is an air conditioner device which forcibly transfers the heat energy of a low-level heat source to a high-level heat source, under the working condition of heating in winter, the COP can reach 2-4, the energy efficiency is more than that of PTC heating, and the endurance mileage can be effectively prolonged by more than 20%. The heat pump electric scroll compressor is the most key component in the whole heat pump air conditioning system and is related to the efficiency of the whole system. At present, a heat pump air conditioner with a four-way valve is generally adopted, and along with the reduction of outdoor air temperature, the air pressure in an evaporator is very low due to the excessively low outdoor temperature and the poor evaporation capacity of the evaporator in a heat pump air conditioning system, namely, the return flow of a refrigerant is reduced. In order to obtain high-pressure gas, the rotating speed of the compressor is increased, so that the power consumption is greatly increased, the temperature of the discharged gas is greatly increased, the normal operation of a system is not facilitated, the heating capacity is reduced, the efficiency ratio is low, and the energy-saving effect is not achieved.

Therefore, how to design a heat pump electric scroll compressor device capable of improving heating heat at low temperature and improving efficiency ratio becomes a technical problem which needs to be solved urgently at present.

Disclosure of Invention

In order to solve the technical problems in the prior art, the invention provides a heat pump electric scroll compressor and an air supplementing and enthalpy increasing method thereof, so that heating heat can be improved through a scroll compression technology at low temperature, and meanwhile, the efficiency ratio is improved.

In order to achieve the aim, the invention provides a heat pump electric scroll compressor, which comprises a sealed shell and a controller, wherein the left end and the right end of the sealed shell are respectively provided with a low-pressure air inlet and a high-pressure air outlet; a motor stator controlled by the controller is fixedly arranged on one side, close to the low-pressure air inlet, in the sealed shell, a motor rotor is sleeved in an inner cavity of the motor stator, and a rotor spindle is fixedly connected to the inner cavity of the motor rotor; a fixed scroll is fixedly arranged on one side, close to the high-pressure exhaust port, in the sealed shell, and a movable scroll meshed and spirally connected with the scroll part is arranged in the scroll part of the fixed scroll; the fixed scroll is provided with a face plate for covering the movable scroll, the face plate and the fixed scroll enclose a scroll compression cavity for the movable scroll to rotate, the side where the motor rotor is located is a motor cavity, the face plate is provided with an air passing hole, and the scroll compression cavity is communicated with the motor cavity through the air passing hole; the rotor main shaft penetrates through the faceplate to be connected with the movable scroll plate, and the movable scroll plate is driven to rotate by the rotor main shaft; the sealed shell is also provided with an enhanced vapor injection port, the enhanced vapor injection port penetrates through the outer wall of the fixed scroll and is communicated with the scroll compression cavity, and the enhanced vapor injection port is used for being connected with an enhanced vapor pipeline on an external economizer.

As a further preferable technical solution of the present invention, the sealed housing, the motor stator, the motor rotor, and the rotor spindle are combined to form a permanent magnet synchronous motor, the motor stator is wound with a coil, and the motor rotor is a permanent magnet without a coil.

As a further preferable technical solution of the present invention, the faceplate and the seal housing are respectively provided with a bearing, one end of the rotor main shaft is fixedly connected with the bearing on the faceplate, and the other end of the rotor main shaft is fixedly connected with the bearing on the seal housing.

As a further preferable technical solution of the present invention, the sealed housing includes a main housing and an end cover, one end of the main housing is open, the end cover is hermetically connected to the open of the main housing, the high-pressure exhaust port is disposed on the end cover, and the low-pressure intake port is disposed at one end of the main housing away from the end cover.

In a further preferred embodiment of the present invention, the fixed scroll is fitted into the opening of the main casing and abuts against the inner side of the end cover.

In a further preferable technical scheme of the invention, a one-way valve is arranged on an enthalpy-increasing pipeline between the enhanced vapor injection port and the economizer.

As a further preferable technical solution of the present invention, the controller is integrally and fixedly provided on an outer wall of the hermetic enclosure.

S101, starting a controller, wherein a motor stator is electrified and conducted with an external power supply under the control of the controller to generate a rotating magnetic field acting on a motor rotor, and the electronic rotor drives a movable scroll to rotate together under the action of magnetic force;

s102, communicating an evaporator which provides first refrigerant gas to the outside through a low-pressure gas inlet, performing vortex compression on gas in a vortex compression cavity through the interaction of meshed vortex parts between a rotating movable vortex disc and a fixed vortex disc, and generating negative pressure through the vortex compression to enable the first refrigerant gas to be sucked into the vortex compression cavity through a motor cavity;

s103, opening a one-way valve on the enthalpy-increasing pipeline, conducting an economizer of second refrigerant gas provided from the outside and the enthalpy-increasing port in a one-way mode, and supplementing the second refrigerant gas into the vortex compression cavity through the enthalpy-increasing port;

and S104, the movable scroll operates to mix and compress the first refrigerant gas and the second refrigerant gas in the scroll compression cavity, and then the mixed gas is ejected from the high-pressure exhaust port.

As a further preferable technical solution of the present invention, a flow rate adjusting valve is further provided on the enthalpy-increasing pipeline, and the flow rate adjusting valve is controlled by the controller.

By adopting the technical scheme, the heat pump electric scroll compressor and the air-supplying and enthalpy-increasing method thereof can achieve the following beneficial effects:

1) a rotating magnetic field is generated after the motor stator is electrified, and the motor rotor rotates under the action of the magnetic field, so that the motor rotor drives the movable vortex plate to rotate through the rotor spindle, and the movable vortex plate interacts with the fixed vortex plate in the rotating process to realize vortex pressurization;

2) the medium-temperature and medium-pressure second refrigerant gas can be supplemented into the scroll compression cavity through the enhanced vapor injection port, so that the displacement of the heat pump electric scroll compressor is increased, the exhaust temperature is reduced, and the heating capacity is improved;

3) the air-replenishing enthalpy-increasing system is simple in structure, high in reliability and high in energy efficiency ratio, is applied to a heat pump air conditioner, well realizes the air-replenishing enthalpy-increasing function of the heat pump air conditioner at a low temperature, is convenient to design and install, and improves the heating capacity and the efficiency ratio;

4) compared with the traditional PTC heating mode, the efficiency is improved by at least 2 times, and the PTC heater has wide application prospect in the future.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

FIG. 1 is a schematic view of an embodiment of a heat pump electric scroll compressor according to the present invention;

FIG. 2 is a front view of the heat pump electric scroll compressor;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;

FIG. 4 is a schematic view of the internal structure of the heat pump electric scroll compressor;

fig. 5 is a schematic structural view of the fixed scroll.

In the figure: 1. the device comprises a sealed shell, 2, a main shell, 3, an end cover, 4, an enhanced vapor injection port, 5, a low-pressure air inlet, 6, a high-pressure air outlet, 7, a controller, 8, a fixed scroll, 9, a movable scroll, 10, a faceplate, 11, a bearing, 12, a rotor spindle, 13, a motor stator, 14, a motor rotor, 15 and a scroll part.

The objects, features and advantages of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The invention will be further described with reference to the accompanying drawings and specific embodiments. In the preferred embodiments, the terms "upper", "lower", "left", "right", "middle" and "a" are used for clarity of description only, and are not used to limit the scope of the invention, and the relative relationship between the terms and the terms is not changed or modified substantially without changing the technical content of the invention.

As shown in fig. 1 to 5, the heat pump electric scroll compressor, which increases enthalpy by supplying air to realize efficient operation in a low temperature environment, includes a sealed housing 1 and a controller 7, wherein a low pressure air inlet 5 and a high pressure air outlet 6 are respectively arranged at the left and right ends of the sealed housing 1; a motor stator 13 controlled by the controller 7 is fixedly arranged on one side, close to the low-pressure air inlet 5, in the sealed shell 1, a motor rotor 14 is sleeved in an inner cavity of the motor stator 13, and a rotor spindle 12 is fixedly connected to the inner cavity of the motor rotor 14; a fixed scroll 8 is fixedly arranged on one side, close to the high-pressure exhaust port 6, in the sealed shell 1, and a movable scroll 9 meshed and connected with the scroll part 15 is arranged in a scroll part 15 of the fixed scroll 8; the fixed scroll 8 is provided with a face plate 10 covering the movable scroll 9, the face plate 10 and the fixed scroll 8 enclose a scroll compression cavity for the movable scroll 9 to rotate, the side of the motor rotor 14 is provided with a motor cavity, the face plate 10 is used for separating the scroll compression cavity and the motor cavity, the face plate 10 is provided with a gas passing hole, and the scroll compression cavity is communicated with the motor cavity through the gas passing hole; the rotor main shaft 12 penetrates through the faceplate 10 to be connected with the movable scroll 9, and the movable scroll 9 is driven to rotate by the rotor main shaft 12; still be equipped with air injection enthalpy addition mouth 4 on the seal shell 1, air injection enthalpy addition mouth 4 passes the outer wall of static vortex dish 8 with the vortex compression chamber intercommunication, air injection enthalpy addition mouth 4 be used for with the enthalpy addition pipeline connection on the outside economic ware, air injection enthalpy addition mouth 4 with be equipped with the check valve on the enthalpy addition pipeline between the economic ware.

The sealed shell 1, the motor stator 13, the motor rotor 14 and the rotor spindle 12 are combined to form a permanent magnet synchronous motor, the motor stator 13 is wound with a coil, and the motor rotor 14 is a permanent magnet without a coil.

In a specific implementation, the faceplate 10 and the seal housing 1 are respectively provided with a bearing 11, one end of the rotor main shaft 12 is fixedly connected with the bearing 11 on the faceplate 10, and the other end of the rotor main shaft 12 is fixedly connected with the bearing 11 on the seal housing 1.

In specific implementation, the sealed housing 1 includes main casing body 2 and end cover 3, the one end of main casing body 2 is uncovered, end cover 3 airtight connection is in the uncovered department of main casing body 2, high pressure exhaust port 6 sets up on the end cover 3, low pressure air inlet 5 sets up main casing body 2 keeps away from the one end of end cover 3. The fixed scroll 8 is fitted into the opening of the main casing 2 and abuts against the inside of the end cap 3.

In another specific implementation, the controller 7 is integrally and fixedly arranged on the outer wall of the sealed housing 1, the controller 7 is used for controlling the on-off and the current magnitude of a power supply provided for the motor stator 13, and the motor stator 13 is powered on and then generates a rotating magnetic field to drive the motor rotor 14 to rotate, so that the controller 7 controls the start-stop and the rotating speed of the motor rotor 14, and further controls the start-stop and the rotating speed of the fixed scroll 8.

As a general inventive concept, the invention also provides an air-supplying enthalpy-increasing method of the heat pump electric scroll compressor, which comprises the following steps.

S101, the controller 7 is started, the motor stator 13 is electrified and conducted with an external power supply under the control of the controller 7 to generate a rotating magnetic field acting on the motor rotor 14, and the electronic rotor drives the movable scroll 9 to rotate together under the action of magnetic force.

In step S101, the controller 7 is used for controlling on/off of the motor stator 13 and an external power supply, and adjusting voltage, current, or frequency output from the external power supply to the motor stator 13, so as to control start/stop of the electronic rotor and control a rotation speed.

And S102, communicating the refrigerant gas with an evaporator which provides first refrigerant gas from the outside through a low-pressure gas inlet 5, performing vortex compression on gas in a vortex compression cavity through interaction of a meshed vortex part 15 between a rotating movable vortex disk 9 and a fixed vortex disk 8, and generating negative pressure through the vortex compression so as to suck the first refrigerant gas into the vortex compression cavity through a motor cavity.

S103, opening a one-way valve on the enthalpy-increasing pipeline, conducting an economizer of second refrigerant gas provided from the outside and the enhanced vapor injection port 4 in a one-way mode, and supplementing the second refrigerant gas into the vortex compression cavity through the enhanced vapor injection port 4.

In the present embodiment, the first refrigerant gas and the second refrigerant gas are the same type of refrigerant gas, and the difference therebetween is that the first refrigerant gas is a low-temperature low-pressure refrigerant gas, and the second refrigerant gas is a medium-temperature medium-pressure refrigerant gas.

In step S103, the enhanced vapor injection port 4 supplies the second refrigerant gas of intermediate temperature and pressure to the scroll compression chamber to reduce the pressure and temperature in the scroll compression chamber, thereby reducing the temperature of the scroll device formed by the orbiting scroll 9 and the fixed scroll 8.

Preferably, the enthalpy-increasing pipeline is further provided with a flow regulating valve, and the flow regulating valve is controlled by the controller 7, so that the supply of the second refrigerant gas is controllable and adjustable, and the actual use requirement is met, namely the use is convenient.

In step S104, the orbiting scroll 9 is operated to mix and compress the first refrigerant gas and the second refrigerant gas in the scroll compression chamber, and then to discharge the mixed gas through the high-pressure discharge port 6.

It should be noted that the present invention relates to a matching structure of the orbiting scroll 9 and the fixed scroll 8, and a technology of performing scroll compression on gas, which are related to the prior art, and therefore, detailed description thereof is omitted.

By adopting the gas-supplementing enthalpy-increasing method, the second refrigerant gas of the middle temperature and middle pressure provided by the external economizer is fed into the scroll compression cavity through the gas injection enthalpy-increasing port 4, so that the temperature of a scroll device formed by the movable scroll plate 9 and the fixed scroll plate 8 can be reduced, and in addition, the first refrigerant gas of the low temperature and low pressure is compressed again after being mixed with the second refrigerant gas of the middle temperature and middle pressure in the scroll compression cavity while being compressed, the enthalpy value can be increased, thereby the heat production quantity is improved, the effect of improving the efficiency ratio is realized, and the working efficiency of the heat pump electric scroll compressor is improved. In addition, the invention has simple design structure, high reliability and high energy efficiency ratio, is applied to the heat pump air conditioner, well realizes the air-supplementing and enthalpy-increasing functions of the heat pump air conditioner at low temperature, is convenient for design and installation, and can improve the heating capacity and the efficiency ratio. In addition, compared with the traditional PTC heating mode, the efficiency of the invention is improved by at least 2 times, and the invention has wide application prospect in the future.

Although specific embodiments of the present invention have been described above, it will be appreciated by those skilled in the art that these are merely examples and that many variations or modifications may be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims.