CN-224230181-U - Indoor unit for fresh air conditioning system and fresh air conditioning system

Abstract

The application relates to the technical field of household appliances, and discloses an indoor unit for a fresh air conditioning system. The indoor heat exchanger assembly comprises a first indoor heat exchanger and a second indoor heat exchanger, the first indoor heat exchanger and the second indoor heat exchanger are sequentially arranged along the air flow direction in the air channel and are communicated through a first refrigerant flow path, the indoor expansion valve is arranged in the first refrigerant flow path, and the refrigerant flow direction in the first refrigerant flow path is limited from the second indoor heat exchanger to the first indoor heat exchanger. By the arrangement, constant-temperature dehumidification or temperature rising dehumidification of the indoor can be realized under the condition that the whole energy consumption of the fresh air conditioning system is not increased. Meanwhile, the application also discloses a fresh air conditioning system.

Inventors

• LIU SHIJIE
• CUI GUODONG
• ZHANG MING
• CUI BIN

Assignees

• 青岛海尔空调器有限总公司
• 海尔智家股份有限公司

Dates

Publication Date

20260512

Application Date

20250414

Claims (10)

1. 1. An indoor unit for a fresh air conditioning system, comprising: a shell provided with an air duct; The indoor heat exchanger component comprises a first indoor heat exchanger and a second indoor heat exchanger which are sequentially arranged along the air flow direction in the air duct, and the first indoor heat exchanger and the second indoor heat exchanger are communicated through a first refrigerant flow path, An indoor expansion valve provided in the first refrigerant flow path; wherein the refrigerant flow direction in the first refrigerant flow path is defined from the second indoor heat exchanger to the first indoor heat exchanger.
2. 2. The indoor unit of claim 1, further comprising: And a control device electrically connected with the outdoor unit and the indoor expansion valve respectively, The humidity sensor is used for acquiring indoor humidity; The control device is also electrically connected with the humidity sensor, and can control the working state of the indoor expansion valve according to the running mode of the outdoor unit and the indoor humidity.
3. 3. The indoor unit of claim 2, wherein, And when the outdoor unit is in a refrigeration mode and the indoor humidity is greater than or equal to a humidity threshold, the control device controls the indoor expansion valve to be in a full-open state.
4. 4. The indoor unit of claim 2, wherein, And when the outdoor unit is in a heating mode and the indoor humidity is greater than or equal to a humidity threshold, the control device controls the indoor expansion valve to be in a throttling state.
5. 5. The indoor unit of claim 1, wherein the fresh air conditioning system comprises an outdoor unit that communicates with the indoor unit through a second refrigerant flow path and a third refrigerant flow path, respectively; the indoor unit further includes: The indoor four-way valve comprises a first interface, a second interface, a third interface and a fourth interface, wherein the first interface is communicated with the first indoor heat exchanger, the second interface is communicated with the second indoor heat exchanger, the third interface is communicated with the second refrigerant flow path, and the fourth interface is communicated with the third refrigerant flow path.
6. 6. The indoor unit of claim 1, further comprising: the water receiving disc is arranged below the first indoor heat exchanger and is used for receiving condensed water dripped by the first indoor heat exchanger.
7. 7. The indoor unit of claim 1, wherein the housing comprises a heat exchange cabin and an air supply cabin that are communicated, the heat exchange cabin is provided with an air return port, a fresh air port and an air exhaust port, the air supply cabin is provided with an air supply port, the air return port and the air supply port are respectively communicated with the indoor space, and the fresh air port and the air exhaust port are respectively communicated with the outdoor space; the indoor unit further includes: and the total heat recovery module is arranged in the heat exchange cabin.
8. 8. The indoor unit of claim 7, further comprising: The humidifying component is arranged between the indoor heat exchanger component and the air supply air port and is used for humidifying air flowing through the humidifying component.
9. 9. The indoor unit of claim 8, further comprising: and the electric heating device is arranged between the indoor heat exchanger assembly and the humidifying assembly and is used for heating air flowing through the electric heating device.
10. 10. A fresh air conditioning system, comprising: The indoor unit according to any one of claims 1 to 9, and, The outdoor unit comprises an outdoor heat exchanger and an outdoor expansion valve, the outdoor heat exchanger is communicated with the indoor four-way valve through a second refrigerant flow path, and the outdoor expansion valve is arranged in the second refrigerant flow path; Wherein, when either one of the indoor expansion valve and the outdoor expansion valve is in a throttling state, the other is in a full-open state.

Description

Indoor unit for fresh air conditioning system and fresh air conditioning system Technical Field The application relates to the technical field of household appliances, in particular to an indoor unit for a fresh air conditioning system and the fresh air conditioning system. Background With the development of society, the popularity of air conditioners is also increasing. In order to improve the use experience of users, most of the air conditioners are now configured with a dehumidifying mode, and particularly for the southern area, the indoor dehumidifying through the air conditioner can greatly improve the life quality of the users. In the current air conditioner, in a dehumidification mode, an indoor heat exchanger is generally used as an evaporator, so that moisture in air flowing through the indoor heat exchanger is condensed in the indoor heat exchanger, and the effect of dehumidifying the air is achieved. However, in the above dehumidification process, the indoor heat exchanger also reduces the temperature of the air flowing therethrough, and in this case, if the dehumidified air is directly blown into the room, the indoor temperature may be reduced. In the related art, in order to implement constant temperature dehumidification or temperature rising dehumidification of an indoor, an electric auxiliary heating device is generally disposed between an indoor heat exchanger and an air supply port of an air conditioner. Therefore, the electric auxiliary heating device can heat the dry air to achieve the effects of constant temperature dehumidification or temperature rising dehumidification. In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art: In the related art, in the existing air conditioner provided with the electric auxiliary heating device, the electric auxiliary heating device is required to be continuously started in the processes of operating constant-temperature dehumidification and temperature rising dehumidification, which increases the overall energy consumption of the air conditioner. It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the application and thus may include information that does not form the prior art that is already known to those of ordinary skill in the art. Disclosure of utility model The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview, and is intended to neither identify key/critical elements nor delineate the scope of such embodiments, but is intended as a prelude to the more detailed description that follows. The embodiment of the disclosure provides an indoor unit for a fresh air conditioning system and the fresh air conditioning system, wherein the indoor unit is provided with a plurality of indoor heat exchangers, and a refrigerant flow path communicated with the plurality of indoor heat exchangers is provided with an expansion valve. In this way, the indoor heat exchanger located at the upstream of the air duct can be configured as an evaporator, and the indoor heat exchanger located at the downstream of the air duct can be configured as a condenser by controlling the operation mode of the outdoor unit in cooperation with the expansion valve of the indoor unit. By the arrangement, constant-temperature dehumidification or temperature rising dehumidification of the indoor can be realized under the condition that the whole energy consumption of the fresh air conditioning system is not increased. The embodiment of the disclosure provides an indoor unit for a fresh air conditioning system, which comprises a shell, an indoor heat exchanger component and an indoor expansion valve. The indoor heat exchanger assembly comprises a first indoor heat exchanger and a second indoor heat exchanger, the first indoor heat exchanger and the second indoor heat exchanger are sequentially arranged along the air flow direction in the air channel and are communicated through a first refrigerant flow path, the indoor expansion valve is arranged in the first refrigerant flow path, and the refrigerant flow direction in the first refrigerant flow path is limited from the second indoor heat exchanger to the first indoor heat exchanger. In some embodiments, the indoor unit further comprises a control device and a humidity sensor. The control device is respectively and electrically connected with the outdoor unit and the indoor expansion valve, the humidity sensor is used for acquiring indoor humidity, the control device is also electrically connected with the humidity sensor, and the control device can control the working state of the indoor expansion valve according to the running mode of the outdoor unit and the indoor humidity. In some embodiments, when the outdoor unit is in the cooling mode a