Air conditioner

Abstract

The utility model discloses an air conditioner, and belongs to the technical field of air treatment. The air conditioner comprises a shell, the interior of the shell comprises a first cavity and a second cavity, the first cavity comprises an indoor air duct and a fresh air duct, the indoor air duct and the fresh air duct each comprise an air supply cavity, and the shell is provided with an outdoor exhaust air inlet and an outdoor exhaust air outlet; the outdoor heat exchanger and the outdoor fan are arranged in the second cavity, the outdoor fan enables outdoor air to enter from the outdoor exhaust air inlet, and the outdoor air is exhausted from the outdoor exhaust air outlet after passing through the outdoor heat exchanger; the indoor heat exchanger and the indoor fan are arranged in the air supply cavity, and the indoor fan is used for guiding indoor air to enter the indoor air duct and then return to a room after passing through the indoor heat exchanger; or the indoor fan is used for guiding outdoor fresh air to enter the fresh air duct, and then the outdoor fresh air passes through the indoor heat exchanger and is sent indoors. The air conditioner is installed outdoors, and noise is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of air treatment, and in particular to an air conditioner. Background Art

[0002] An air conditioner is a device for controlling indoor air, and is a device for adjusting the temperature, humidity, air cleanliness or air flow of indoor air. The air conditioner discharges cooled air obtained through a refrigeration cycle, which generally consists of a process of compressing, condensing, expanding and evaporating a refrigerant, or discharges heated air obtained by reversing the above process to the indoor space, thereby conditioning the indoor air.

[0003] As the air tightness of energy-saving buildings improves, fresh air fans become necessary equipment. As a result, there is a situation where air conditioners and fresh air fans are installed at the same time. The fresh air fans can adjust the temperature and humidity of the fresh air and then send it indoors. However, the indoor unit and fresh air fans need to occupy more indoor space, and the equipment is installed indoors, and there is noise problem when running at high wind speed. Utility Model Content

[0004] The present application provides an air conditioner which can be installed outdoors for use and reduces noise.

[0005] In one aspect of the present application, an air conditioner comprises: a shell, which comprises a first cavity and a second cavity, the first cavity comprises an indoor air duct and a fresh air duct, the indoor air duct and the fresh air duct both comprise an air supply cavity, and the shell is provided with an outdoor exhaust inlet and an outdoor exhaust outlet; an outdoor heat exchanger and an outdoor fan are arranged in the second cavity, the outdoor fan allows outdoor air to enter from the outdoor exhaust inlet, pass through the outdoor heat exchanger, and be discharged from the outdoor exhaust outlet; an indoor heat exchanger and an indoor fan are arranged in the air supply cavity, the indoor fan can allow indoor air to enter into the indoor air duct, and then return to the room after passing through the indoor heat exchanger; or, the indoor fan can allow outdoor fresh air to enter the fresh air duct, and then be sent to the room after passing through the indoor heat exchanger.

[0006] On the other hand of the present application, an air conditioner, a first cavity is divided into a return air cavity, a supply air cavity, an exhaust air cavity and a fresh air cavity by a partition, the return air cavity and the supply air cavity are connected to form an indoor air duct, the return air cavity and the exhaust air cavity are connected to form an exhaust air duct, and the fresh air cavity and the supply air cavity are connected to form a fresh air duct; a full heat exchange core is arranged in the first cavity, and two channels of the full heat exchange core are respectively located on the exhaust air duct and the fresh air duct.

[0007] In some embodiments, the first cavity includes an exhaust duct; an indoor exhaust outlet is provided on the wall between the first cavity and the second cavity, and the indoor exhaust outlet is respectively connected to the exhaust duct and the second cavity; the indoor exhaust outlet is located on the windward side of the outdoor fan; the outdoor fan allows the indoor air to enter the second cavity through the exhaust duct and then be discharged from the outdoor exhaust outlet.

[0008] In some embodiments, the indoor exhaust air outlet is located on the windward side of the outdoor heat exchanger.

[0009] In some embodiments, the air conditioner comprises: a compressor for compressing refrigerant; a four-way valve for guiding the refrigerant compressed by the compressor to an outdoor heat exchanger or to an indoor heat exchanger; the indoor heat exchanger comprises a first indoor heat exchanger and a second indoor heat exchanger, the first indoor heat exchanger being located on a windward side of the second indoor heat exchanger; in a refrigerant circuit of the air conditioner, the first indoor heat exchanger and the second indoor heat exchanger are arranged in parallel;

[0010] The refrigerant circuit is also provided with: a first throttling device, which is connected in series to the branch where the first indoor heat exchanger is located, and is located on the side where the first indoor heat exchanger is connected to the outdoor heat exchanger; a second throttling device, which is connected in series to the branch where the second indoor heat exchanger is located, and is located on the side where the second indoor heat exchanger is connected to the outdoor heat exchanger.

[0011] In some embodiments, the refrigerant circuit is also provided with: a three-way valve, the three ports of which are respectively connected to the outdoor heat exchanger, the branch where the first indoor heat exchanger is located, and the branch where the second indoor heat exchanger is located; a first solenoid valve, one end of which is connected between the four-way valve and the outdoor heat exchanger, and the other end of which is connected between the second throttling device and the second indoor heat exchanger.

[0012] In some embodiments, when the air conditioner operates in a dehumidification and reheating mode, the first solenoid valve is in an open state.

[0013] In some embodiments, it also includes: a water-refrigerant heat exchanger, which is arranged on the air flow path between the outdoor exhaust inlet and the outdoor exhaust outlet; in the refrigerant circuit, the water-refrigerant heat exchanger is arranged in parallel with the outdoor heat exchanger.

[0014] In some embodiments, a second solenoid valve is connected in series to the branch where the water-refrigerant heat exchanger is located.

[0015] In some embodiments, an indoor exhaust inlet and an indoor air supply outlet are provided on the same side wall of the shell, the indoor exhaust inlet is the air inlet end of the indoor air duct, and the indoor air supply outlet is connected to the air supply cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 shows a front view of an air conditioner according to some embodiments;

[0017] Figure 2 shows a side view of an air conditioner according to some embodiments;

[0018] Figure 3 shows an internal structural diagram of an air conditioner according to some embodiments;

[0019] Figure 4 shows an application scenario diagram of an air conditioner according to some embodiments;

[0020] Figure 5 shows an air flow path diagram of an air conditioner in a fresh air mode according to some embodiments;

[0021] Figure 6 shows an air flow path diagram of an air conditioner in an indoor mode according to some embodiments;

[0022] Figure 7 shows an air flow path diagram of an air conditioner in a mixed air mode according to some embodiments;

[0023] Figure 8 shows a refrigerant circuit diagram of an air conditioner according to some embodiments;

[0024] Fig. 9 A refrigerant circuit diagram of an air conditioner in normal dehumidification according to some embodiments is shown;

[0025] Fig.10 A refrigerant circuit diagram of an air conditioner during deep dehumidification according to some embodiments is shown;

[0026] Fig.11 A refrigerant circuit diagram of an air conditioner during dehumidification and reheating according to some embodiments is shown;

[0027] In the above figures, 10, shell; 101, middle partition; 11, front panel; 12, rear panel; 13, left panel; 14, right panel; 15, first chamber; 151, return air chamber; 152, air supply chamber; 153, exhaust chamber; 154, fresh air chamber; 155, indoor exhaust inlet; 156, indoor air supply outlet; 157, outdoor fresh air inlet; 158, indoor exhaust outlet; 1591, first connecting air duct; 1592, second connecting passage; 16, second chamber; 161, outdoor exhaust Inlet; 162, outdoor exhaust outlet; 17, switching valve; 20, full heat exchange core; 30, indoor heat exchanger; 31, first indoor heat exchanger; 32, second indoor heat exchanger; 40, indoor fan; 50, outdoor heat exchanger; 51, water-refrigerant heat exchanger; 60, outdoor fan; 71, compressor; 72, four-way valve; 731, first throttling device; 732, second throttling device; 74, three-way valve; 751, first solenoid valve; 752, second solenoid valve; 753, third solenoid valve. DETAILED DESCRIPTION

[0028] In order to make the purpose and implementation method of the present application clearer, the exemplary implementation method of the present application will be clearly and completely described below in conjunction with the drawings in the exemplary embodiments of the present application. Obviously, the described exemplary embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0029] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0030] The terms "first", "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0031] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0032] The air conditioner in this application performs a refrigeration cycle of the air conditioner by using a compressor, a condenser, an expansion valve and an evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion and evaporation, and supplies refrigerant to the air that has been conditioned and heat-exchanged.

[0033] The compressor compresses the refrigerant gas in a low temperature and low pressure state and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and the heat is released to the surrounding environment through the condensation process.

[0034] The expansion valve expands the high-temperature and high-pressure liquid refrigerant condensed in the condenser into a low-pressure liquid refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor. The evaporator can achieve a refrigeration effect by utilizing the latent heat of evaporation of the refrigerant to exchange heat with the material to be cooled. In the entire cycle, the air conditioner can adjust the temperature of the indoor space.

[0035] The outdoor unit of the air conditioner refers to a portion of a refrigeration cycle including a compressor and an outdoor heat exchanger, the indoor unit of the air conditioner includes an indoor heat exchanger, and an expansion valve may be provided in the indoor unit or the outdoor unit.

[0036] The indoor heat exchanger and the outdoor heat exchanger function as a condenser or an evaporator. When the indoor heat exchanger functions as a condenser, the air conditioner functions as a heater in a heating mode, and when the indoor heat exchanger functions as an evaporator, the air conditioner functions as a cooler in a cooling mode.

[0037] Reference Figures 1 to 3 The air conditioner according to the embodiment of the present application includes a housing 10, and the housing 10 can be in a rectangular parallelepiped shape to form an overall appearance.

[0038] The housing 10 includes two groups of opposite side panels, one of which is a front panel 11 and a rear panel 12 , and the other is a left panel 13 and a right panel 14 .

[0039] The housing 10 is provided with two cavities, namely a first cavity 15 and a second cavity 16, which are separated by a middle partition 101. The first cavity 15 and the second cavity 16 can be arranged up and down, with the first cavity 15 located at the top and the second cavity 16 located at the bottom. In other embodiments, the first cavity 15 and the second cavity 16 can also be arranged left and right.

[0040] The first chamber 15 is used to accommodate components of the indoor unit, and the second chamber 16 is used to accommodate components of the outdoor unit.

[0041] The first chamber 15 is provided with a return air chamber 151, a supply air chamber 152, an exhaust air chamber 153 and a fresh air chamber 154. When the return air chamber 151 and the supply air chamber 152 are connected, an indoor air duct is formed; when the return air chamber 151 and the exhaust air chamber 153 are connected, an exhaust air duct is formed; when the fresh air chamber 154 and the supply air chamber 152 are connected, a fresh air duct is formed.

[0042] The return air chamber 151 and the supply air chamber 152 are connected to the indoor room; the fresh air chamber 154 and the exhaust air chamber 153 are connected to the outdoor room. Figure 3 and Figure 4 The air conditioner can be installed outdoors, and the return air chamber 151 and the supply air chamber 152 are respectively connected to air ducts, and the air ducts pass through the wall into the room so that the two chambers are connected with the room.

[0043] According to an embodiment of the present application, an indoor exhaust air inlet 155 is provided on the side wall of the housing 10 corresponding to the return air chamber 151, and the indoor exhaust air inlet 155 is communicated with the return air chamber 151. An indoor supply air outlet 156 is provided on the side wall of the housing 10 corresponding to the supply air chamber 152, and the indoor supply air outlet 156 is communicated with the supply air chamber 152. An outdoor fresh air inlet 157 is provided on the side wall of the housing 10, for example, on the front panel 11, and the outdoor fresh air inlet 157 is communicated with the fresh air chamber 154. In other embodiments, the outdoor fresh air inlet 157 can also be provided on the top panel of the housing 10.

[0044] In some embodiments, the indoor exhaust inlet 155 and the indoor air supply outlet 156 are located on the same panel of the housing 10, for example, both are arranged on the rear panel 12. In this way, the rear panel 12 of the air conditioner can be installed toward the wall, and the indoor exhaust inlet 155 and the indoor air supply outlet 156 are respectively connected to the air duct to communicate with the indoor air.

[0045] The indoor air supply outlet 156 is located above the indoor exhaust inlet 155. The air duct connected to the indoor air supply outlet 156 directly extends through the wall to the top of the room. The air is supplied from above, which can reduce the length of the air duct.

[0046] In some embodiments, an indoor exhaust outlet 158 ​​is provided on the middle partition 101 between the first cavity 15 and the second cavity 16. The indoor exhaust outlet 158 ​​is connected with the exhaust cavity 153 and the second cavity 16. The indoor exhaust outlet 158 ​​is located on the windward side of the outdoor fan 60, so that under the action of the outdoor fan 60, the indoor exhaust air can enter the second cavity 16 through the exhaust air duct and then be discharged from the second cavity 16.

[0047] The exhaust of indoor air is achieved by the outdoor fan 60 of the outdoor unit, which can save a fan, simplify the product structure and reduce costs.

[0048] According to an embodiment of the present application, the air supply chamber 152 is located above the return air chamber 151 , and the air exhaust chamber 153 is located above the fresh air chamber 154 .

[0049] The exhaust cavity 153 is connected to the second cavity 16 via a first connecting passage 1591 , which can be surrounded by a partition. The upper end of the first connecting passage 1591 is connected to the exhaust cavity 153 , and the lower end thereof is connected to the indoor exhaust outlet 158 ​​on the middle partition 101 .

[0050] The fresh air cavity 154 is connected to the outdoor fresh air inlet 157 via a second connecting passage 1592 , and the second connecting passage 1592 may be surrounded by a partition.

[0051] The first communication channel 1591 and the second communication channel 1592 are arranged in the left-right direction.

[0052] In other embodiments, the air supply cavity 152 is located below the return air cavity 151, and the exhaust cavity 153 is located below the fresh air cavity 154. The indoor exhaust outlet 158 ​​on the middle partition 101 directly connects the exhaust cavity 153 and the second cavity 16.

[0053] The indoor unit includes a total heat exchange core 20. The total heat exchange core 20 is disposed in the first chamber 15.

[0054] The return air chamber 151 and the exhaust air chamber 153 are respectively located at two ends of a channel of the total heat exchange core 20 , that is, the return air chamber 151 and the exhaust air chamber 153 are connected through a channel of the total heat exchange core 20 .

[0055] The fresh air chamber 154 and the supply air chamber 152 are respectively located at two ends of another channel of the total heat exchange core 20 , that is, the fresh air chamber 154 and the supply air chamber 152 are connected through another channel of the total heat exchange core 20 .

[0056] The two channels of the total heat exchange core 20 are respectively located on the fresh air duct and the exhaust air duct, so that the outdoor fresh air and the indoor exhaust air can exchange heat at the total heat exchange core 20, thereby recovering the heat of the indoor exhaust air.

[0057] A switching valve 17 may be provided on the partition between the return air chamber 151 and the air supply chamber 152. When the switching valve 17 is opened, the return air chamber 151 and the air supply chamber 152 are connected, that is, the indoor air duct is connected; when the switching valve 17 is closed, the return air chamber 151 and the air supply chamber 152 are not connected.

[0058] The indoor unit includes an indoor heat exchanger 30, which is arranged in the air supply cavity 152 and is used to exchange heat with the air passing therethrough. The indoor heat exchanger 30 includes a refrigerant tube and a heat dissipation fin, in which the refrigerant flows, and the heat dissipation fin is penetrated on the refrigerant tube, so as to increase the surface area of ​​the refrigerant tube to improve the heat exchange efficiency between the refrigerant and the air.

[0059] In some embodiments, the indoor heat exchanger 30 includes a first indoor heat exchanger 31 and a second indoor heat exchanger 32. In the air supply cavity 152, the first indoor heat exchanger 31 is located on the windward side of the second indoor heat exchanger 32.

[0060] The indoor unit includes an indoor fan 40, which is arranged in the air supply chamber 152 and is used to drive air flow. When the indoor air duct is connected, the indoor fan 40 can allow indoor air to enter the indoor air duct and circulate to the room after passing through the indoor heat exchanger 30. When the fresh air duct is connected, the indoor fan 40 can allow outdoor air to enter the fresh air duct and pass through the total heat exchange core 20 and the indoor heat exchanger 30 to be sent to the room.

[0061] An outdoor exhaust inlet 161 and an outdoor exhaust outlet 162 are provided on the side wall of the housing 10 corresponding to the second cavity 16. The outdoor exhaust inlet 161 can be provided at the rear of the left panel 13, or at the rear of the right panel 14, or on the rear panel 12. The outdoor exhaust outlet 162 can be provided on the front panel 11.

[0062] The outdoor unit includes an outdoor heat exchanger 50, which is disposed on the air movement path between the outdoor exhaust air inlet 161 and the outdoor exhaust air outlet 162, and is used to exchange heat with the outdoor air passing therethrough. The outdoor heat exchanger 50 may be a fin type heat exchanger.

[0063] The outdoor unit includes an outdoor fan 60 , which is disposed in the second chamber 16 . The outdoor fan 60 is used to drive outdoor air to enter the second chamber 16 from the outdoor exhaust inlet 161 , and then be exhausted from the outdoor exhaust outlet 162 after passing through the outdoor heat exchanger 50 .

[0064] Shutters may be provided at the outdoor exhaust inlet 161 and / or the outdoor exhaust outlet 162 to prevent water from flowing into the housing 10 through the air vents.

[0065] A flow equalizer plate may be provided near the outdoor exhaust inlet 161 of the second chamber 16. After entering from the outdoor exhaust inlet 161, the outdoor air is first rectified by the flow equalizer plate to adjust the airflow uniformity before continuing to flow toward the outdoor heat exchanger 50.

[0066] In some embodiments, the indoor exhaust outlet 158 ​​is located on the windward side of the outdoor heat exchanger 50. In this way, the indoor exhaust air can dissipate heat for the outdoor heat exchanger 50, thereby improving the heat dissipation efficiency.

[0067] The following describes the air flow path of the air conditioner:

[0068] <Fresh air mode>

[0069] Indoor unit: Reference Figure 5 The arrows in the figure indicate the air flow direction. The switching valve 17 is closed, and the outdoor fresh air enters the device from the outdoor fresh air inlet 157, then reaches the full heat exchange core 20 to exchange heat with the indoor exhaust air, and then reaches the first indoor heat exchanger 31, and then reaches the second indoor heat exchanger 32, and then is sent to the indoor air supply outlet 156 by the indoor fan 40, and the fresh air is sent into the room, completing a fresh air treatment.

[0070] Indoor air enters the device through the indoor exhaust inlet 155, reaches the full heat exchange core 20 to exchange heat with outdoor fresh air, then reaches the indoor exhaust outlet 158, enters the second chamber 16, and is discharged to the outdoors under the action of the outdoor fan 60.

[0071] <Indoor mode>

[0072] Indoor unit: Reference Figure 6 , the arrows in the figure indicate the air flow direction, and the air valve at the outdoor fresh air inlet 157 is closed. Indoor air enters the device through the indoor exhaust air inlet 155, passes through the switching valve 17 (open) to reach the first indoor heat exchanger 31, then reaches the second indoor heat exchanger 32, and is then sent to the indoor air outlet 156 by the indoor fan 40, and finally sent into the room, completing an indoor air treatment cycle.

[0073] <Mixed Air Mode>

[0074] Indoor unit: Reference Figure 7 The arrows in the figure indicate the air flow direction. Outdoor fresh air enters the device from the outdoor fresh air inlet 157, then reaches the full heat exchange core 20 to exchange heat with the indoor exhaust air, then reaches the first indoor heat exchanger 31, then reaches the second indoor heat exchanger 32, and then is sent to the indoor air supply outlet 156 by the indoor fan 40. The fresh air is sent into the room, completing a fresh air treatment.

[0075] Indoor air enters the device through the indoor exhaust inlet 155 and is then divided into two paths:

[0076] It reaches the full heat exchange core 20 to exchange heat with the outdoor fresh air, then reaches the indoor exhaust outlet 158, enters the second chamber 16, and is discharged to the outdoors under the action of the outdoor fan 60.

[0077] The other path passes through the switching valve 17 (open) to reach the first indoor heat exchanger 31, then reaches the second indoor heat exchanger 32, and is then sent to the indoor air outlet 156 by the indoor fan 40, and finally is sent into the room.

[0078] In each mode, outdoor unit: refer to Figures 5 to 7 The outdoor air enters from the outdoor exhaust inlet 161 , passes through the outdoor heat exchanger 50 , and is finally discharged to the outdoors from the outdoor exhaust outlet 162 driven by the outdoor fan 60 .

[0079] Reference Figure 8 The air conditioner includes a compressor 71 for sucking and compressing the refrigerant to make it a high-temperature and high-pressure state; a four-way valve 72 for switching the refrigerant flow path in the cooling mode and the refrigerant flow path in the heating mode; and a throttling device for reducing the pressure of the refrigerant.

[0080] The four-way valve 72 guides the refrigerant compressed by the compressor 71 to the outdoor heat exchanger 50 in the cooling mode, and guides the refrigerant compressed in the compressor 71 to the indoor heat exchanger 30 in the heating mode. The indoor heat exchanger 30 evaporates the refrigerant compressed by the outdoor unit in the cooling mode, and condenses the refrigerant compressed by the compressor 71 in the heating mode; the outdoor heat exchanger 50 condenses the refrigerant compressed by the compressor 72 in the cooling mode, and evaporates the refrigerant compressed by the indoor unit in the heating mode.

[0081] The compressor 71, the four-way valve 72, the outdoor heat exchanger 50, the throttling device and the indoor heat exchanger 30 are connected to form a refrigerant circuit through a refrigerant copper pipe.

[0082] The exhaust end of the compressor 71 is connected to the A pipe of the four-way valve 72, and the C pipe of the four-way valve 72 is connected to the suction end of the compressor 71; the D pipe of the four-way valve 72 is connected to the first end of the outdoor heat exchanger 50, and the B pipe of the four-way valve 72 is connected to the first end of the indoor heat exchanger 30. A throttling device is connected in series between the second end of the outdoor heat exchanger 50 and the second end of the indoor heat exchanger 30.

[0083] The compressor 71, the four-way valve 72, the throttling device and other components can be arranged in the second chamber 16; or the compressor 71, the four-way valve 72, the throttling device and other components can be arranged in another housing. In other embodiments, the throttling device can be arranged in the first chamber 15.

[0084] In some embodiments, reference Figure 8 In the refrigerant circuit, the first indoor heat exchanger 31 and the second indoor heat exchanger 32 are arranged in parallel.

[0085] The throttling device includes a first throttling device 731. The first throttling device 731 is connected in series to the branch where the first indoor heat exchanger 31 is located, and is located between the first indoor heat exchanger 31 and the outdoor heat exchanger 50.

[0086] The throttling device includes a second throttling device 732. The second throttling device 732 is connected in series to the branch where the second indoor heat exchanger 32 is located, and is located between the second indoor heat exchanger 32 and the outdoor heat exchanger 50.

[0087] In some embodiments, the first throttling device 731 and the second throttling device 732 are capillaries.

[0088] A three-way valve 74 is also provided on the refrigerant circuit, and the three-way valve 74 is connected to the branch between the outdoor heat exchanger 50 and the two indoor heat exchangers. That is, the first port of the three-way valve 74 is connected to the outdoor heat exchanger 50, the second port of the three-way valve 74 is connected to the first indoor heat exchanger 31, and the third port of the three-way valve 74 is connected to the second indoor heat exchanger 32.

[0089] During normal dehumidification, the first port and the third port of the three-way valve 74 are disconnected, the refrigerant at the second indoor heat exchanger 32 is disconnected, and the second indoor heat exchanger 32 does not work.

[0090] During deep dehumidification, the first port of the three-way valve 74 is connected to the second port and the third port respectively, and the first indoor heat exchanger 31 and the second indoor heat exchanger 32 are used as evaporators.

[0091] In other embodiments, the three-way valve 74 can also be replaced by two solenoid valves, one of which is connected in series with the first throttling device 731 to control the flow of the refrigerant in the branch where the first indoor heat exchanger 31 is located; the other solenoid valve is connected in series with the second throttling device 732 to control the flow of the refrigerant in the branch where the second indoor heat exchanger 32 is located.

[0092] In some embodiments, the refrigerant circuit is provided with a first solenoid valve 751. One end of the first solenoid valve 751 is connected between the four-way valve 72 and the outdoor heat exchanger 50, and the other end is connected between the second throttling device 732 and the second indoor heat exchanger 32.

[0093] In the dehumidification and reheating mode, the first solenoid valve 751 is opened, and the first port and the third port of the three-way valve 74 are disconnected.

[0094] In some embodiments, the first throttling device 731 and the second throttling device 732 are expansion valves, and there is no need to set the branch where the three-way valve 74 and the first solenoid valve 751 are located.

[0095] In the normal dehumidification mode, the second throttling device 732 is closed, so that the refrigerant at the second indoor heat exchanger 32 is disconnected, and the second indoor heat exchanger 32 does not work; only the first indoor heat exchanger 32 is used as an evaporator to cool and dehumidify the fresh air and / or indoor air.

[0096] In the deep dehumidification mode, the first throttling device 731 and the second throttling device 732 both play a throttling role. The fresh air / indoor air passes through the first indoor heat exchanger 31 (evaporator) and the second indoor heat exchanger 32 (evaporator) in sequence to be cooled and dehumidified.

[0097] In the dehumidification and reheating mode, the second throttling device 732 is fully opened, and the first throttling device 731 plays a throttling role. The fresh air / indoor air passes through the first indoor heat exchanger 31 (evaporator) in sequence to cool down and dehumidify, and then passes through the second indoor heat exchanger 32 (condenser) to heat.

[0098] In some embodiments, the outdoor unit includes a water-refrigerant heat exchanger 51. In the second chamber 16, the water-refrigerant heat exchanger 51 is located on the windward side or the wind outlet side of the outdoor heat exchanger 50.

[0099] The water-refrigerant heat exchanger 51 has a refrigerant passage and a water passage. The refrigerant passage is connected in parallel with the outdoor heat exchanger 50 in the refrigerant circuit. Water flows through the water passage.

[0100] The water-refrigerant heat exchanger 51 is used to realize heat exchange between the refrigerant and water. When the heat load is low, the water-refrigerant heat exchanger 51 can be used to save energy.

[0101] A second solenoid valve 752 is connected in series to the branch where the water-refrigerant heat exchanger 51 is located, and is used to control the on-off of the refrigerant at the water-refrigerant heat exchanger 51 .

[0102] When the second solenoid valve 752 is opened, water cooling at the water-refrigerant heat exchanger 51 can improve the heat exchange efficiency of the outdoor unit.

[0103] A third solenoid valve 753 is connected in series to the branch where the outdoor heat exchanger 50 is located, and is used to control the on-off of the refrigerant at the outdoor heat exchanger 50 .

[0104] In the present application, the water-refrigerant heat exchanger 51 can be used to handle small loads, which is more energy-efficient.

[0105] In some embodiments, the inlet end of the water channel of the water-refrigerant heat exchanger 51 is connected to a water inlet pipeline, and the outlet end of the water channel is connected to a water outlet pipeline. The water inlet pipeline is connected to an external water source. A water pump can be connected in series to the water inlet pipeline to pump water.

[0106] The following describes the flow path of the refrigerant in each dehumidification mode:

[0107] <Normal dehumidification mode>

[0108] Reference Fig. 9 The high-temperature and high-pressure gas refrigerant is discharged from the compressor 71, reaches the four-way valve 72, and then reaches the outdoor heat exchanger 50, and after heat exchange with the outdoor air, it becomes a low-temperature and high-pressure gas-liquid two-phase refrigerant; then it passes through the three-way valve 74 and flows to the first throttling device 731 to become a low-temperature and low-pressure liquid refrigerant, and then reaches the first indoor heat exchanger 31 to exchange heat with the air outside the pipe to become a high-temperature and low-pressure gas refrigerant, and the gas refrigerant returns to the compressor 71 through the four-way valve 72.

[0109] <Deep Dehumidification Mode>

[0110] Reference Fig.10 The high-temperature and high-pressure gas refrigerant is discharged from the compressor 71, reaches the four-way valve 72, and then reaches the outdoor heat exchanger 50, where it exchanges heat with the outdoor air and becomes a low-temperature and high-pressure gas-liquid two-phase refrigerant; and then passes through the three-way valve 74 and is divided into two paths:

[0111] It flows to the first throttling device 731 and becomes a low-temperature and low-pressure liquid refrigerant, and then reaches the first indoor heat exchanger 31 to exchange heat with the air outside the tube and become a high-temperature and low-pressure gas refrigerant.

[0112] It reaches the second throttling device 732 and becomes a low-temperature and low-pressure liquid refrigerant, and then reaches the second indoor heat exchanger 32 to exchange heat with the air outside the tube and become a high-temperature and low-pressure gas refrigerant.

[0113] The two paths of gas refrigerant merge together and return to the compressor 71 through the four-way valve 72 .

[0114] <Dehumidification and reheating mode>

[0115] Reference Fig.11 , high-temperature and high-pressure gas refrigerant is discharged from the compressor 71, reaches the four-way valve 72, and then is divided into two paths:

[0116] It reaches the outdoor heat exchanger 50, exchanges heat with the outdoor air and becomes a low-temperature and high-pressure gas-liquid two-phase refrigerant, then passes through the three-way valve 74 and flows to the first throttling device 731 to become a low-temperature and low-pressure liquid refrigerant, and then reaches the first indoor heat exchanger 31 to exchange heat with the air outside the tube and become a high-temperature and low-pressure gas refrigerant.

[0117] The air passes through the first solenoid valve 751 and reaches the second indoor heat exchanger 32, where it exchanges heat with the air outside the tube, thereby increasing the air temperature.

[0118] The two refrigerant paths merge and return to the compressor 71 through the four-way valve 72 .

[0119] In the present application, the indoor unit and the outdoor unit of the air conditioner are arranged in a housing 10, and the air conditioner can be installed outdoors, avoiding the noise problem when the indoor unit is installed indoors.

[0120] In the present application, the indoor unit in the air conditioner has a fresh air duct and an indoor air duct, which can realize the fresh air function and the basic air conditioning function at the same time, avoiding the problem of occupying space when the indoor unit and the fresh air fan are installed separately.

[0121] In the present application, the exhaust duct of the indoor unit is connected to the outdoor duct, and the outdoor fan is used to promote the flow of indoor exhaust air, thereby reducing the use of one fan, simplifying the product structure, and reducing costs.

[0122] In the present application, a first indoor heat exchanger 31 and a second indoor heat exchanger 32 are provided to realize ordinary dehumidification, deep dehumidification, dehumidification and reheating of fresh air / indoor air, and improve the comfort of air supply.

[0123] In the present application, a water-refrigerant heat exchanger 51 is added in parallel with the outdoor heat exchanger 50, and the water-refrigerant heat exchanger 51 is used to handle small loads, which is more energy-efficient.

[0124] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

[0125] For the convenience of explanation, the above description has been made in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or limit the embodiments to the specific forms disclosed above. Based on the above teachings, various modifications and variations can be obtained. The selection and description of the above embodiments are to better explain the principles and practical applications, so that those skilled in the art can better use the embodiments and various different variations of the embodiments suitable for specific use considerations.

Claims

1. An air conditioner, characterized in that: include: A housing, comprising a first cavity and a second cavity, wherein the first cavity comprises an indoor air duct and a fresh air duct, wherein the indoor air duct and the fresh air duct both comprise an air supply cavity, and the housing is provided with an outdoor exhaust inlet and an outdoor exhaust outlet, wherein the outdoor exhaust inlet and the outdoor exhaust outlet are both connected to the second cavity; An outdoor heat exchanger and an outdoor fan are arranged in the second chamber, and the outdoor fan is used to guide outdoor air to enter from the outdoor exhaust inlet, pass through the outdoor heat exchanger, and be discharged from the outdoor exhaust outlet; An indoor heat exchanger and an indoor fan are arranged in the air supply cavity, and the indoor fan is used to guide indoor air into the indoor air duct and then return to the room after passing through the indoor heat exchanger; Alternatively, the indoor fan is used to guide outdoor fresh air into the fresh air duct, and then send it to the room after passing through the indoor heat exchanger.

2. The air conditioner according to claim 1, characterized in that: The first chamber includes an exhaust air duct; An indoor exhaust outlet is provided on the wall between the first cavity and the second cavity, and the indoor exhaust outlet is communicated with the exhaust duct and the second cavity respectively; The indoor exhaust outlet is located on the windward side of the outdoor fan; The outdoor fan allows indoor air to enter the second chamber through the exhaust air duct and then be discharged from the outdoor exhaust outlet.

3. The air conditioner according to claim 2, characterized in that: The indoor exhaust outlet is located on the windward side of the outdoor heat exchanger.

4. The air conditioner according to claim 1, characterized in that: include: compressor, for compressor refrigerant; a four-way valve, used for guiding the refrigerant compressed by the compressor to the outdoor heat exchanger or to the indoor heat exchanger; The indoor heat exchanger comprises a first indoor heat exchanger and a second indoor heat exchanger, wherein the first indoor heat exchanger is located on the windward side of the second indoor heat exchanger; In the refrigerant circuit of the air conditioner, the first indoor heat exchanger and the second indoor heat exchanger are arranged in parallel; The refrigerant circuit is also provided with: A first throttling device is connected in series to the branch where the first indoor heat exchanger is located, and is located at a side of the first indoor heat exchanger connected to the outdoor heat exchanger; The second throttling device is connected in series to the branch where the second indoor heat exchanger is located, and is located at a side of the second indoor heat exchanger connected to the outdoor heat exchanger.

5. The air conditioner according to claim 4, characterized in that: The refrigerant circuit is also provided with: A three-way valve, wherein three ports of the three-way valve are respectively connected to the outdoor heat exchanger, the branch where the first indoor heat exchanger is located, and the branch where the second indoor heat exchanger is located; A first solenoid valve has one end connected between the four-way valve and the outdoor heat exchanger, and the other end connected between the second throttling device and the second indoor heat exchanger.

6. The air conditioner according to claim 5, characterized in that: When the air conditioner operates in a dehumidification and reheating mode, the first solenoid valve is in an open state.

7. The air conditioner according to claim 1, characterized in that: Also includes: The water-refrigerant heat exchanger is arranged on the air flow path between the outdoor exhaust inlet and the outdoor exhaust outlet; in the refrigerant circuit, the water-refrigerant heat exchanger is arranged in parallel with the outdoor heat exchanger.

8. The air conditioner according to claim 7, characterized in that: A second solenoid valve is connected in series to the branch where the water-refrigerant heat exchanger is located.

9. The air conditioner according to claim 1, characterized in that: An indoor exhaust inlet and an indoor air supply outlet are provided on the same side wall of the shell, the indoor exhaust inlet is the air inlet end of the indoor air duct, and the indoor air supply outlet is communicated with the air supply cavity.

10. An air conditioner, characterized in that: include: A shell, comprising a first cavity and a second cavity, wherein the first cavity is divided into a return air cavity, a supply air cavity, an exhaust air cavity and a fresh air cavity by a partition, wherein the return air cavity and the supply air cavity are connected to form an indoor air duct, wherein the return air cavity and the exhaust air cavity are connected to form an exhaust air duct, wherein the fresh air cavity and the supply air cavity are connected to form a fresh air duct, wherein an outdoor exhaust air inlet and an outdoor exhaust air outlet are provided on the shell, wherein the outdoor exhaust air inlet and the outdoor exhaust air outlet are both connected to the second cavity; An outdoor heat exchanger and an outdoor fan are arranged in the second chamber, and the outdoor fan is used to guide outdoor air to enter from the outdoor exhaust inlet, pass through the outdoor heat exchanger, and be discharged from the outdoor exhaust outlet; A full heat exchange core is arranged in the first cavity, and two channels of the full heat exchange core are respectively located on the exhaust air duct and the fresh air duct; An indoor heat exchanger and an indoor fan are arranged in the air supply cavity; when the indoor air duct is connected, the indoor fan is used to guide the indoor air in the indoor air duct and then return to the room through the indoor heat exchanger; When the fresh air duct is connected, the indoor fan is used to guide the outdoor fresh air in the fresh air duct through the total heat exchange core and the outdoor heat exchanger and then send it to the room.

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