CN-116638923-B - New energy automobile's thermal management system and new energy automobile

CN116638923BCN 116638923 BCN116638923 BCN 116638923BCN-116638923-B

Abstract

The invention provides a heat management system of a new energy automobile and the new energy automobile, which comprise a first heat exchanger, a refrigerant loop, an air conditioner heating loop and a heat exchange system, wherein the refrigerant loop comprises a first loop mode, in the first loop mode, the refrigerant loop is circularly connected with an air conditioner compressor, the first heat exchanger, a front air conditioner evaporator and an outdoor heat exchanger, the air conditioner heating loop is in heat exchange coupling with the refrigerant loop through the first heat exchanger, and is positioned at the downstream of the front air conditioner evaporator in the flow direction of heating airflow and used for heating the heating airflow heated by the front air conditioner evaporator. The refrigerant which is subjected to heat exchange at the first heat exchanger can emit the residual heat in the refrigerant to the surrounding environment at the front air conditioner evaporator, and the front air conditioner evaporator is positioned at the upstream of the air conditioner heating loop in the heating airflow direction, so that the external environment heat absorbed by the refrigerant at the outdoor heat exchanger is secondarily utilized, and the utilization rate of the external environment heat is further improved.

Inventors

ZHANG XIAOCHUN
DENG XIANG
JIN YONGZHEN
ZHOU TONG
ZENG GUANGHUA

Assignees

岚图汽车科技有限公司

Dates

Publication Date: 20260505
Application Date: 20230711

Claims (5)

1. A thermal management system for a new energy vehicle, comprising: a first heat exchanger; the system comprises a refrigerating circuit, a first heat exchanger, a front air conditioner evaporator, a second heat exchanger, a first heat exchanger, a second heat exchanger, a third heat exchanger, a fourth heat exchanger, a fifth heat exchanger, a third heat exchanger, a fourth heat exchanger and a fourth heat exchanger, wherein the refrigerating circuit comprises a first circuit mode; an air-conditioning heating loop which exchanges heat with the refrigerant loop through the first heat exchanger in a coupling way, and, The air conditioner heating loop is positioned at the downstream of the front air conditioner evaporator in the flow direction of heating air flow and is used for heating the heating air flow which is heated by the front air conditioner evaporator; The refrigerant circuit comprises a plurality of circuit modes including the first circuit mode, and the refrigerant circuit in each circuit mode is connected with different equipment; The heat management system of the new energy automobile further comprises a control device, wherein the control device is used for adjusting a loop mode of the refrigerant loop; the refrigerant loop also comprises a second loop mode, wherein in the second loop mode, the refrigerant loop is circularly connected with the air conditioner compressor, the first heat exchanger and the outdoor heat exchanger; the device also comprises a second heat exchanger and an electric drive heat exchange loop; the refrigerant loop also comprises a third loop mode, and in the third loop mode, the refrigerant loop is circularly connected with the air conditioner compressor, the first heat exchanger and the second heat exchanger, and the electric drive heat exchange loop is in coupling heat exchange with the refrigerant loop through the second heat exchanger; The control device is configured to: when the external environment temperature is above the first set temperature, adjusting the refrigerant loop to be in a second loop mode; when the external environment temperature is between the first set temperature and a second set temperature, adjusting the refrigerant loop to be in a first loop mode, wherein the second set temperature is lower than the first set temperature; When the external environment temperature is lower than the second set temperature, adjusting the refrigerant loop to be in a third loop mode, and adjusting the heating power of the air conditioner compressor according to whether the electric drive heat exchange loop operates or not; according to whether the electric drive heat exchange loop is operated, adjusting heating power of an air conditioner compressor comprises the following steps: If the electric drive heat exchange loop runs, adjusting the heating power of the air conditioner compressor to a first set power; And if the electric drive heat exchange loop does not operate, adjusting the heating power of the air conditioner compressor to a second set power higher than the first set power.
2. The heat management system of the new energy automobile of claim 1, wherein a first tee joint, a second tee joint and a third tee joint are arranged on the refrigerant loop, wherein each joint of the first tee joint is respectively connected with the first heat exchanger, the second tee joint and the third tee joint, the second tee joint is also connected with the outdoor heat exchanger and the front air conditioner evaporator, and the third tee joint is also connected with the front air conditioner evaporator and the second heat exchanger; In the first loop mode, the air conditioner compressor, the first heat exchanger, the first three-way joint, the third three-way joint, the front air conditioner evaporator and the outdoor heat exchanger are sequentially and circularly communicated; in the second loop mode, the air-conditioning compressor, the first heat exchanger, the first three-way joint, the second three-way joint and the outdoor heat exchanger are sequentially and circularly communicated; In the third loop mode, the air conditioner compressor, the first heat exchanger, the first three-way joint, the third three-way joint and the second heat exchanger are sequentially and circularly communicated.
3. The thermal management system of the new energy automobile as claimed in claim 2, wherein a first control valve is arranged between the first three-way joint and the second three-way joint; a second control valve is arranged between the first three-way joint and the third three-way joint; a third control valve is arranged between the third three-way joint and the front air conditioner evaporator; A fourth control valve is arranged between the third three-way joint and the second heat exchanger; a fifth control valve is arranged between the front air conditioner evaporator and the second three-way joint; a sixth control valve is arranged between the air conditioner compressor and the second heat exchanger; A seventh control valve is arranged between the air conditioner compressor and the outdoor heat exchanger; An eighth control valve is arranged between the second three-way joint and the outdoor heat exchanger.
4. The thermal management system of a new energy automobile of claim 3, wherein the third control valve, the fourth control valve and the eighth control valve are all electronic expansion valves.
5. A new energy vehicle, characterized in that it comprises a thermal management system of the new energy vehicle according to any one of claims 1-4.

Description

New energy automobile's thermal management system and new energy automobile Technical Field The invention relates to the field of automobile thermal management systems, in particular to a thermal management system of a new energy automobile and the new energy automobile. Background The comprehensive development of new energy automobiles is not easy, more and more traditional commercial automobile enterprises change the existing fuel automobile type into an electric or hybrid automobile type, but the problem of heat management in the automobile is brought along with the change, and the conventional common solution is to add corresponding pipelines on the basis of the original whole automobile heat management system so as to realize the utilization of heat in each loop as much as possible. In the related internal technology, in order to improve the energy saving performance of the new energy automobile in the heating process, the heat in the external environment and the heat in the electric heat exchange loop are utilized through the related thermal management loop, but due to the lower external temperature utilization rate of the current thermal management system, when the external temperature is lower, enough heat is more difficult to absorb from the external environment, the heating effect of the new energy automobile is affected, and the heating effect is still to be further improved. Disclosure of Invention The invention mainly aims to provide a new energy automobile and a heat management system thereof, which aim to solve the problem that the heat absorbed by the current heat management system from the external environment is obviously insufficient when the external temperature is lower in the related technology. In a first aspect, the present invention provides a thermal management system for a new energy automobile, which adopts the following technical scheme: a thermal management system for a new energy vehicle, comprising: a first heat exchanger; the system comprises a refrigerating circuit, a first heat exchanger, a front air conditioner evaporator, a second heat exchanger, a first heat exchanger, a second heat exchanger, a third heat exchanger, a fourth heat exchanger, a fifth heat exchanger, a third heat exchanger, a fourth heat exchanger and a fourth heat exchanger, wherein the refrigerating circuit comprises a first circuit mode; an air-conditioning heating loop which exchanges heat with the refrigerant loop through the first heat exchanger in a coupling way, and, The air-conditioning heating loop is positioned at the downstream of the front air-conditioning evaporator in the flow direction of the heating air flow and is used for heating the heating air flow which is heated by the front air-conditioning evaporator. In some embodiments, the refrigerant circuit includes a plurality of circuit modes including the first circuit mode, the refrigerant circuit in each circuit mode being different in equipment to which it is connected; the thermal management system of the new energy automobile further comprises a control device, wherein the control device is used for adjusting the loop mode of the refrigerant loop. In some embodiments, the refrigerant circuit further comprises a second circuit mode, wherein in the second circuit mode, the refrigerant circuit is in circulation connection with the air conditioning compressor, the first heat exchanger and the outdoor heat exchanger. In some embodiments, a second heat exchanger and an electrically driven heat exchange circuit are also included; The refrigerant loop can also form a third loop mode, in the third loop mode, the refrigerant loop is circularly connected with the air conditioner compressor, the first heat exchanger and the second heat exchanger, and the electric drive heat exchange loop is in coupling heat exchange with the refrigerant loop through the second heat exchanger. In some embodiments, a first three-way joint, a second three-way joint and a third three-way joint are arranged on the refrigerant loop, wherein each joint of the first three-way joint is respectively connected with the first heat exchanger, the second three-way joint and the third three-way joint, the second three-way joint is also connected with the outdoor heat exchanger and the front air conditioner evaporator, and the third three-way joint is also connected with the front air conditioner evaporator and the second heat exchanger; In the first loop mode, the air conditioner compressor, the first heat exchanger, the first three-way joint, the third three-way joint, the front air conditioner evaporator and the outdoor heat exchanger are sequentially and circularly communicated; in the second loop mode, the air-conditioning compressor, the first heat exchanger, the first three-way joint, the second three-way joint and the outdoor heat exchanger are sequentially and circularly communicated; In the third loop mode, the air conditioner compressor, the first heat exchanger, the