Air conditioning device

Abstract

The utility model discloses an air conditioning device which comprises an auxiliary heat exchanger, an inlet of the auxiliary heat exchanger is connected between a four-way valve and an indoor heat exchanger through a switch device, and an outlet of the auxiliary heat exchanger is connected between the four-way valve and an air return port of a compressor, or the inlet of the auxiliary heat exchanger is connected to a water outlet of a water pipeline of the indoor heat exchanger through the switch device. The outlet is connected to a water outlet of the indoor heat exchanger water pipeline. During high-temperature refrigeration in summer, the outdoor heat exchanger serves as a condenser, the indoor heat exchanger serves as an evaporator, and the auxiliary heat exchanger introduces a low-temperature refrigerant or water, so that the temperature near the outdoor heat exchanger is reduced, and the refrigeration capacity of the air conditioning device is improved. During heating in winter, the outdoor heat exchanger serves as an evaporator, the indoor heat exchanger serves as a condenser, and the auxiliary heat exchanger introduces a high-temperature refrigerant or water, so that the temperature nearby the outdoor heat exchanger is increased, frosting at the bottom of the outdoor heat exchanger can be prevented, frosting on the surface of the outdoor heat exchanger is reduced, the heating capacity of the air conditioning device is improved, and comfort of a user is enhanced.

Description

TECHNICAL FIELD

[0001] The utility model relates to air conditioning system technical field especially air conditioning device of improving air conditioning ability, enhancing user comfort. BACKGROUND

[0002] The existing air conditioner can greatly reduce the capacity when refrigerating in the high temperature working condition in summer, thereby affecting the comfort of the user.

[0003] In order to solve the problem of frost formation at the bottom of the heat exchanger, the existing solution adds a supercooling section 31 at the bottom of the outdoor heat exchanger 3, as shown in the figure, but this will waste the area of the heat exchanger and lead to waste of part of the capacity. Figure 1 Some manufacturers add electric heating at the bottom to prevent frost formation at the bottom of the heat exchanger, which will waste electricity and is not conducive to economic performance.

[0004] The above information disclosed in the background of the application is only used to increase the understanding of the background of the application, therefore, it can include prior art known by those skilled in the art. SUMMARY

[0005] The utility model discloses an air conditioning device, which solves the technical problem of insufficient air conditioning capacity caused by high-temperature refrigeration and frost / ice formation on the outdoor unit of the existing air conditioning device.

[0006] To achieve the above-mentioned utility model purposes, the utility model adopts the following technical solutions:

[0007] An air conditioning device comprises a compressor, a four-way valve, an outdoor heat exchanger, an expansion valve, an indoor heat exchanger and an auxiliary heat exchanger.

[0008] Its features are that,

[0009] The auxiliary heat exchanger comprises:

[0010] An auxiliary heat exchanger body is close to the outdoor heat exchanger and provides energy for the outdoor heat exchanger.

[0011] An outlet and an inlet are located on the auxiliary heat exchanger body; the inlet is connected to the four-way valve and the indoor heat exchanger through a switch device; and the outlet is connected to the four-way valve and the gas return port of the compressor.

[0012] Alternatively, the indoor heat exchanger comprises a water pipe, the inlet is connected to the water outlet of the water pipe through a switch device, and the outlet is connected to the water inlet of the water pipe.

[0013] The air conditioning device has the following advantages or beneficial effects: the auxiliary heat exchanger is added to the air conditioning device, the inlet of the auxiliary heat exchanger is connected to the four-way valve and the indoor heat exchanger through the switch device, and the outlet of the auxiliary heat exchanger is connected to the four-way valve and the compressor return gas port. In summer, when the air conditioning device is used for refrigeration, the outdoor heat exchanger is used as a condenser, and the low-temperature and low-pressure gaseous refrigerant drawn from the system pipeline enters the auxiliary heat exchanger, so as to reduce the temperature near the outdoor heat exchanger and improve the refrigeration capacity of the air conditioning device. In winter, when the air conditioning device is used for heating, the outdoor heat exchanger is used as an evaporator, and the high-temperature and high-pressure gaseous refrigerant drawn from the system pipeline enters the auxiliary heat exchanger, so as to increase the temperature near the outdoor heat exchanger, prevent frost from forming at the bottom of the outdoor heat exchanger, reduce frost on the surface of the outdoor heat exchanger, improve the heating capacity of the air conditioning device, and enhance the comfort of the user. Alternatively, the inlet of the auxiliary heat exchanger is connected to the water outlet of the indoor heat exchanger water pipeline through the switch device, and the outlet of the auxiliary heat exchanger is connected to the water outlet of the indoor heat exchanger water pipeline. In summer, when the air conditioning device is used for refrigeration, the outdoor heat exchanger is used as a condenser, the indoor heat exchanger is used as an evaporator, the water outlet of the indoor heat exchanger water pipeline is low-temperature water, and the low-temperature water drawn from the water pipeline enters the auxiliary heat exchanger, so as to reduce the temperature near the outdoor heat exchanger and improve the refrigeration capacity of the air conditioning device. In winter, when the air conditioning device is used for heating, the outdoor heat exchanger is used as an evaporator, the indoor heat exchanger is used as a condenser, the water outlet of the indoor heat exchanger water pipeline is high-temperature water, and the high-temperature water drawn from the water pipeline enters the auxiliary heat exchanger, so as to increase the temperature near the outdoor heat exchanger, prevent frost from forming at the bottom of the outdoor heat exchanger, reduce frost on the surface of the outdoor heat exchanger, improve the heating capacity of the air conditioning device, and enhance the comfort of the user.

[0014] In some embodiments, the four-way valve comprises:

[0015] A D interface for connecting the compressor discharge port;

[0016] An E interface for connecting the indoor heat exchanger;

[0017] A C interface for connecting the outdoor heat exchanger;

[0018] An S interface for connecting the compressor return gas port;

[0019] The inlet is connected to the E interface of the four-way valve and the indoor heat exchanger through the switch device;

[0020] The outlet is connected to the S interface of the four-way valve and the compressor return gas port.

[0021] The above technical scheme has the following advantages or beneficial effects: the S interface of the four-way valve is connected to the compressor return gas port, the outlet of the auxiliary heat exchanger is connected between the S interface of the four-way valve and the compressor return gas port, the E interface of the four-way valve is connected to the indoor heat exchanger, and the inlet of the auxiliary heat exchanger is connected between the E interface of the four-way valve and the indoor heat exchanger, so that when high-temperature refrigeration is performed, the low-temperature and low-pressure gaseous refrigerant between the four-way valve and the indoor heat exchanger enters the auxiliary heat exchanger to reduce the temperature of the outdoor heat exchanger, thereby improving the refrigeration capacity of the air conditioning device, and when winter heating is performed, the high-temperature and high-pressure gaseous refrigerant between the four-way valve and the indoor heat exchanger enters the auxiliary heat exchanger to increase the temperature of the outdoor heat exchanger, thereby improving the heating capacity of the air conditioning device.

[0022] In some embodiments, the auxiliary heat exchanger is located on the side of the outdoor heat exchanger, and / or the auxiliary heat exchanger is located below the outdoor heat exchanger, and / or the auxiliary heat exchanger is located above the outdoor heat exchanger.

[0023] The above technical scheme has the following advantages or beneficial effects: by arranging the auxiliary heat exchanger on the side and / or above and / or below the outdoor heat exchanger, the installation of the auxiliary heat exchanger is facilitated, and the effect of the auxiliary heat exchanger on providing heat or cold to the outdoor heat exchanger is improved.

[0024] In some embodiments, the auxiliary heat exchanger includes sheet metal and a refrigerant pipe arranged on the sheet metal.

[0025] The above technical scheme has the following advantages or beneficial effects: the refrigerant pipe releases energy, the sheet metal provides installation support for the refrigerant pipe, and further radiates the energy released by the refrigerant pipe to the outdoor heat exchanger through the sheet metal.

[0026] In some embodiments, the sheet metal is a housing of the outdoor unit.

[0027] The above technical scheme has the following advantages or beneficial effects: by using the housing of the outdoor unit as the sheet metal, additional sheet metal parts and installation can be avoided, and space is saved.

[0028] In some embodiments, the auxiliary heat exchangers below the outdoor heat exchanger and the auxiliary heat exchangers at other positions are respectively connected to the four-way valve and the indoor heat exchanger through switching devices.

[0029] Alternatively, the auxiliary heat exchangers below the outdoor heat exchanger and the auxiliary heat exchangers at other positions are respectively connected to the water outlet of the water pipe through switching devices.

[0030] The technical scheme has the following advantages or beneficial effects: the multiple switch devices are arranged to control the start and stop of the auxiliary heat exchanger under the outdoor heat exchanger and the auxiliary heat exchangers in other positions, so that in winter heating, only when the auxiliary heat exchanger under the outdoor heat exchanger is started in the case of icing under the outdoor heat exchanger.

[0031] In some embodiments, the outdoor heat exchanger does not have a supercooling section.

[0032] The technical scheme has the following advantages or beneficial effects: the area of the outdoor heat exchanger is ensured, and the waste of air conditioning capacity is avoided.

[0033] In some embodiments, the air conditioning device comprises:

[0034] The outdoor fan is configured to run at a maximum speed or a maximum speed gear when the switch device is turned on.

[0035] The technical scheme has the following advantages or beneficial effects: the heat exchange efficiency of the outdoor heat exchanger is enhanced by adjusting the speed of the outdoor fan, the air of the auxiliary heat exchanger and the outdoor heat exchanger is subjected to convective and radiative heat exchange, the temperature of the outdoor heat exchanger is lowered to further improve the refrigeration capacity of the air conditioning device in high-temperature refrigeration, and the temperature of the outdoor heat exchanger is raised to further improve the heating capacity of the air conditioning device in winter heating.

[0036] In some embodiments, the air conditioning device comprises:

[0037] The timing module is configured to time the on time of the switch device.

[0038] The technical scheme has the following advantages or beneficial effects: the on time of the switch device is timed to determine the start time of the auxiliary heat exchanger. The auxiliary heat exchanger can be turned off after a certain time.

[0039] In some embodiments, the air conditioning device comprises:

[0040] The outdoor environment temperature detection module is configured to detect the outdoor environment temperature.

[0041] The compressor suction pressure detection module is configured to detect the compressor suction pressure.

[0042] The compressor discharge pressure detection module is configured to detect the compressor discharge pressure.

[0043] The control module is configured to receive the outdoor environment temperature, the compressor discharge pressure and the compressor suction pressure, and output a control signal to the switch device.

[0044] The technical scheme has the advantages or beneficial effects that the outdoor environment temperature, the compressor suction pressure and the compressor exhaust are collected, and the state of the switch device is controlled to ensure that the start and stop of the auxiliary heat exchanger meet the requirements.

[0045] Other features and advantages of the present application will become more apparent from the following detailed description of the application when read in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0046] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor under the premise of the drawings.

[0047] Figure 1 It is a schematic diagram of the air conditioning device according to the prior art.

[0048] Figure 2 It is a system diagram of the air conditioning device according to the embodiment.

[0049] Figure 3 It is a refrigerant circulation schematic diagram of the air conditioning device in cooling mode according to the embodiment.

[0050] Figure 4 It is a refrigerant circulation schematic diagram of the air conditioning device in heating mode according to the embodiment.

[0051] Figure 5 It is a principle block diagram of the air conditioning device according to the embodiment.

[0052] Figure 6 It is a control flow diagram of the air conditioning device according to the embodiment.

[0053] Figure 7 It is a system diagram of the air conditioning device according to another embodiment.

[0054] Figure 8 It is a refrigerant circulation schematic diagram of the air conditioning device in cooling mode according to another embodiment.

[0055] Figure 9 It is a refrigerant circulation schematic diagram of the air conditioning device in heating mode according to another embodiment.

[0056] Figure 10 It is a principle block diagram of the air conditioning device according to another embodiment.

[0057] Figure 11 It is a system diagram of the air conditioning device according to still another embodiment.

[0058] Figure 12Fig. 4 is a schematic view of a refrigerant cycle in a cooling mode of an air conditioning apparatus according to a further embodiment.

[0059] Figure 13 Fig. 5 is a schematic view of a refrigerant cycle in a hottest mode of an air conditioning apparatus according to a further embodiment. In the figure,

[0060] 1, compressor;

[0061] 2, four-way valve;

[0062] 3, outdoor heat exchanger; 31, subcooling section;

[0063] 41, indoor expansion valve; 42, outdoor expansion valve;

[0064] 5, indoor heat exchanger; 51, water outlet of water line; 52, water inlet of water line;

[0065] 61, side auxiliary heat exchanger; 62, bottom auxiliary heat exchanger;

[0066] 7, switching device; 71, first switching device; 72, second switching device;

[0067] 81, outdoor ambient temperature detection module; 82, compressor suction pressure detection module; 83, compressor discharge pressure detection module; 84, timing module.

[0068] 9, control module. DETAILED DESCRIPTION

[0069] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0070] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0071] The terms "first", "second", etc. are used only for the purpose of description and do not imply or indicate relative importance or imply a number of the technical features indicated. Thus, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0072] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or internal conduction of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0073] In the present application, unless otherwise explicitly specified and limited, the "upper" or "lower" of the first feature to the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the "upper", "above" and "top" of the first feature to the second feature include that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "lower", "below" and "bottom" of the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0074] The following disclosure provides many different embodiments or examples for implementing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeatedly refer to numbers or letters in different examples, and such repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those skilled in the art can realize the application of other processes or the use of other materials.

[0075] The air conditioning device performs a refrigeration cycle of the air conditioning device by using a compressor, a condenser, a throttling device, and an evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation, and performs refrigeration or heating for an indoor space.

[0076] The low-temperature and low-pressure refrigerant enters the compressor, which compresses the refrigerant gas into a high-temperature and high-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 heat is released to the surrounding environment through the condensation process.

[0077] The throttling device expands the high-temperature and high-pressure liquid-phase refrigerant formed in the condenser into a low-pressure liquid-phase refrigerant. The evaporator evaporates the refrigerant expanded in the throttling device and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor. The evaporator can achieve a refrigeration effect by exchanging heat with the material to be cooled using the latent heat of evaporation of the refrigerant. Throughout the cycle, the air conditioning device can adjust the temperature of the indoor space.

[0078] The outdoor unit of the air conditioning device refers to the part of the refrigeration cycle including the compressor and the outdoor heat exchanger, the indoor unit of the air conditioning device includes the indoor heat exchanger, and the throttling device can be provided in the indoor unit or the outdoor unit.

[0079] The indoor heat exchanger and the outdoor heat exchanger are used as a condenser or an evaporator. When the indoor heat exchanger is used as a condenser, the air conditioning device is used as a heater in a heating state, and when the indoor heat exchanger is used as an evaporator, the air conditioning device is used as a cooler in a cooling state.

[0080] An air conditioning device includes a refrigerant circulation circuit, and an auxiliary heat exchanger is added to the refrigerant circulation circuit, the auxiliary heat exchanger is used to provide energy to the outdoor heat exchanger, and the auxiliary heat exchanger is used to provide cold energy to the outdoor heat exchanger in high-temperature refrigeration and provide heat to the outdoor heat exchanger in winter heating, so as to enhance the heat dissipation of the outdoor heat exchanger, thereby improving the capacity of the air conditioning device and improving the comfort.

[0081] In the example of Figure 2 , the air conditioning device includes a compressor 1, a four-way valve 2, an outdoor heat exchanger 3, an expansion valve, an indoor heat exchanger 5, and an auxiliary heat exchanger.

[0082] The expansion valve includes an indoor expansion valve 41 and an outdoor expansion valve 42.

[0083] In some embodiments, the expansion valve includes an outdoor expansion valve 42.

[0084] The auxiliary heat exchanger includes an auxiliary heat exchanger body and an inlet and an outlet located in the auxiliary heat exchanger body.

[0085] The auxiliary heat exchanger body is close to the outdoor heat exchanger, and provides energy to the outdoor heat exchanger 3.

[0086] In the refrigeration mode, the outdoor heat exchanger 3 is provided with cold energy to reduce the temperature of the outdoor heat exchanger 3 and improve the refrigeration capacity of the outdoor heat exchanger 3. In the heating mode, the outdoor heat exchanger 3 is provided with heat to increase the temperature of the outdoor heat exchanger 3, prevent frosting of the outdoor heat exchanger 3, and improve the heating capacity of the outdoor heat exchanger 3.

[0087] The inlet is located on the auxiliary heat exchanger body and is connected between the four-way valve 2 and the indoor heat exchanger.

[0088] The outlet is located on the auxiliary heat exchanger body and is connected between the four-way valve 2 and the compressor 1 return gas port.

[0089] The inlet is connected between the four-way valve 2 and the indoor heat exchanger 5 through the switch device 7.

[0090] The start and stop of the auxiliary heat exchanger can be controlled through the switch device 7 to control whether the auxiliary heat exchanger is connected to the refrigerant circulation loop according to the demand.

[0091] The air conditioning device is provided with an auxiliary heat exchanger, the outlet of the auxiliary heat exchanger is connected between the four-way valve 2 and the compressor 1 return gas port, and the inlet is connected between the four-way valve 2 and the indoor heat exchanger 5 through the switch device 7. In the summer high-temperature refrigeration mode, the outdoor heat exchanger 3 acts as a condenser, and low-temperature and low-pressure gaseous refrigerant drawn from the system pipeline enters the auxiliary heat exchanger, thereby reducing the temperature near the outdoor heat exchanger 3, improving the heat exchange efficiency of the outdoor heat exchanger 3, and improving the refrigeration capacity of the air conditioning device. In the winter heating mode, the outdoor heat exchanger 3 acts as an evaporator, and high-temperature and high-pressure gaseous refrigerant drawn from the system pipeline enters the auxiliary heat exchanger, thereby increasing the temperature near the outdoor heat exchanger 3, preventing frosting at the bottom of the outdoor heat exchanger 3, reducing frosting on the surface of the outdoor heat exchanger 3, improving the heat exchange efficiency of the outdoor heat exchanger 3, improving the heating capacity of the air conditioning device, and enhancing user comfort.

[0092] The four-way valve 2 includes a D interface, an E interface, a C interface, and an S interface.

[0093] The D interface is used to connect the compressor 1 discharge port.

[0094] The E interface is used to connect the indoor heat exchanger 5.

[0095] The C interface is used to connect the outdoor heat exchanger 3.

[0096] The S interface is used to connect the compressor 1 return gas port.

[0097] The four-way valve 2 can be controlled to conduct the C interface and the D interface, and conduct the E interface and the S interface to realize the refrigeration mode of the air conditioning device.

[0098] The four-way valve 2 can be controlled to conduct the C interface and the S interface, and conduct the D interface and the E interface to realize the heating mode of the air conditioning device.

[0099] The outlet of the auxiliary heat exchanger is connected between the S port of the four-way valve 2 and the return port of the compressor 1.

[0100] The inlet of the auxiliary heat exchanger is connected between the E port of the four-way valve 2 and the indoor heat exchanger 5 through the switch device 7.

[0101] The S port of the four-way valve 2 is connected to the return port of the compressor 1, the outlet of the auxiliary heat exchanger is connected between the S port of the four-way valve 2 and the return port of the compressor 1, the E port of the four-way valve 2 is connected to the indoor heat exchanger 5, and the inlet of the auxiliary heat exchanger is connected between the E port of the four-way valve 2 and the indoor heat exchanger 5. Therefore, when cooling, the low-temperature and low-pressure gaseous refrigerant between the four-way valve 2 and the indoor heat exchanger 5 enters the auxiliary heat exchanger to reduce the temperature of the outdoor heat exchanger 3, improve the heat exchange efficiency of the outdoor heat exchanger 3, and thus improve the cooling capacity of the air conditioning device. When heating in winter, the high-temperature and high-pressure gaseous refrigerant between the four-way valve 2 and the indoor heat exchanger 5 enters the auxiliary heat exchanger to increase the temperature of the outdoor heat exchanger 3, improve the heat exchange efficiency of the outdoor heat exchanger 3, and thus improve the heating capacity of the air conditioning device.

[0102] In the example of Figure 3 , when the air conditioning device operates in the cooling mode, the refrigerant flow direction of the refrigerant circulation loop is: the compressor 1, the D port of the four-way valve 2, the C port, the outdoor heat exchanger 3, the outdoor expansion valve 42, the indoor expansion valve 41, the indoor heat exchanger 5, the E port of the four-way valve 2, the S port, and the compressor. The refrigerant flowing out of the indoor heat exchanger 5 can also enter the side auxiliary heat exchanger 61 and the bottom auxiliary heat exchanger 62 through the switch device 7 and then return to the compressor. The low-temperature and low-pressure gaseous refrigerant discharged through the indoor heat exchanger 5 enters the auxiliary heat exchanger, and the auxiliary heat exchanger provides cold energy to reduce the temperature of the outdoor heat exchanger 3, improve the heat exchange efficiency of the outdoor heat exchanger 3, and thus improve the cooling capacity of the air conditioning device.

[0103] In the example of Figure 3 , when the air conditioning device operates in the cooling mode, the refrigerant flow direction of the refrigerant circulation loop is: the compressor 1, the D port of the four-way valve 2, the C port, the outdoor heat exchanger 3, the outdoor expansion valve 42, the indoor expansion valve 41, the indoor heat exchanger 5, the E port of the four-way valve 2, the S port, and the compressor 1. The refrigerant flowing out of the indoor heat exchanger 5 can also enter the side auxiliary heat exchanger 61 and the bottom auxiliary heat exchanger 62 through the switch device 7 and then return to the compressor 1. The low-temperature and low-pressure gaseous refrigerant discharged through the indoor heat exchanger 5 enters the auxiliary heat exchanger, and the auxiliary heat exchanger provides cold energy to reduce the temperature of the outdoor heat exchanger 3, improve the heat exchange efficiency of the outdoor heat exchanger 3, and thus improve the cooling capacity of the air conditioning device.

[0104] In the example of Figure 4In the example, when the air conditioning device operates in the heating mode, the refrigerant flow direction of the refrigerant circulation loop is: compressor 1, D interface of four-way valve 2, E interface, indoor heat exchanger 5, indoor expansion valve 41, outdoor expansion valve 42, outdoor heat exchanger 3, C interface of four-way valve 2, S interface, compressor 1. Among them, the refrigerant flowing out of the compressor 1 can also pass through the D interface and the E interface of the four-way valve 2, the switch device 7, enter the side auxiliary heat exchanger 61 and the bottom auxiliary heat exchanger 62, and then return to the compressor 1. The high-temperature and high-pressure gaseous refrigerant discharged by the compressor 1 enters the auxiliary heat exchanger, and the auxiliary heat exchanger provides heat to increase the temperature of the outdoor heat exchanger 3, so as to avoid frosting / icing of the outdoor heat exchanger 3 or help defrosting / icing of the outdoor heat exchanger 3, while improving the heat exchange efficiency of the outdoor heat exchanger 3, thereby improving the heating capacity of the air conditioning device and improving the indoor comfort, especially during the defrosting / icing process, the indoor comfort will not be affected.

[0105] The auxiliary heat exchanger includes a side auxiliary heat exchanger 61 and a bottom auxiliary heat exchanger 62.

[0106] The side auxiliary heat exchanger 61 is located on the side of the outdoor heat exchanger 3 and is used to provide energy to the outdoor heat exchanger 3 from the side.

[0107] The shape of the side auxiliary heat exchanger 61 is matched with the shape of the side of the outdoor heat exchanger 3.

[0108] The size of the side auxiliary heat exchanger 61 is matched with the size of the side of the outdoor heat exchanger 3, or the size of the side auxiliary heat exchanger 61 is slightly larger than the size of the side of the outdoor heat exchanger 3, or the size of the side auxiliary heat exchanger 61 is slightly smaller than the size of the side of the outdoor heat exchanger 3.

[0109] The bottom auxiliary heat exchanger 62 is located below the outdoor heat exchanger 3 and is used to provide energy to the outdoor heat exchanger 3 from below.

[0110] The bottom auxiliary heat exchanger 62 can especially solve the problem of frosting and icing at the bottom of the outdoor heat exchanger 3.

[0111] The shape of the bottom auxiliary heat exchanger 62 is matched with the shape of the bottom of the outdoor heat exchanger 3.

[0112] The size of the bottom auxiliary heat exchanger 62 is matched with the size of the bottom of the outdoor heat exchanger 3, or the size of the bottom auxiliary heat exchanger 62 is slightly larger than the size of the bottom of the outdoor heat exchanger 3, or the size of the bottom auxiliary heat exchanger 62 is slightly smaller than the size of the bottom of the outdoor heat exchanger 3.

[0113] In some embodiments, the auxiliary heat exchanger is located on the side of the outdoor heat exchanger 3, and the auxiliary heat exchanger only includes the side auxiliary heat exchanger 61.

[0114] In some embodiments, the auxiliary heat exchanger is located below the outdoor heat exchanger 3, and the auxiliary heat exchanger only includes a bottom auxiliary heat exchanger 62.

[0115] In some embodiments, the auxiliary heat exchanger is located above the outdoor heat exchanger 3, and the auxiliary heat exchanger only includes a top auxiliary heat exchanger.

[0116] In some embodiments, the auxiliary heat exchanger is located on the side and above the outdoor heat exchanger 3, and the auxiliary heat exchanger includes a side auxiliary heat exchanger 61 and a top auxiliary heat exchanger.

[0117] In some embodiments, the auxiliary heat exchanger is located below and above the outdoor heat exchanger 3, and the auxiliary heat exchanger includes a bottom auxiliary heat exchanger 62 and a top auxiliary heat exchanger.

[0118] In some embodiments, the auxiliary heat exchanger is located below, on the side and above the outdoor heat exchanger 3, and the auxiliary heat exchanger includes a bottom auxiliary heat exchanger 62, a side auxiliary heat exchanger 61 and a top auxiliary heat exchanger.

[0119] By arranging the auxiliary heat exchanger on the side and / or above and / or below the outdoor heat exchanger, the installation of the auxiliary heat exchanger is facilitated, and the effect of the auxiliary heat exchanger on providing heat or cold to the outdoor heat exchanger is improved.

[0120] The auxiliary heat exchanger includes sheet metal and refrigerant pipes arranged on the sheet metal.

[0121] The sheet metal provides support for the installation of the refrigerant pipes, and further radiates the energy released by the refrigerant pipes to the outdoor heat exchanger 3 through the sheet metal.

[0122] In some embodiments, the sheet metal is the housing of the outdoor unit.

[0123] By using the housing of the outdoor unit as the sheet metal, additional sheet metal parts and installation can be avoided, and space can be saved.

[0124] The outdoor heat exchanger 3 is not provided with a supercooling section, which can ensure the area of the outdoor heat exchanger 3 and avoid waste of air conditioning capacity.

[0125] The air conditioning device includes an outdoor fan for providing air flow to the outdoor heat exchanger 3 to improve the heat dissipation effect of the outdoor heat exchanger.

[0126] In some embodiments, the outdoor fan is configured to run at a maximum speed or a maximum speed gear when the switch device 7 is turned on.

[0127] The rotation speed of the outdoor fan is adjusted to enhance the heat exchange efficiency of the outdoor heat exchanger 3, so that the auxiliary heat exchanger performs convection and radiation heat exchange with the air of the outdoor heat exchanger 3, the temperature of the outdoor heat exchanger 3 is lowered to further improve the refrigerating capacity of the air conditioning device in high-temperature refrigeration, and the temperature of the outdoor heat exchanger 3 is raised to further improve the heating capacity of the air conditioning device in winter heating.

[0128] In some embodiments, the air conditioning device comprises a timing module 84.

[0129] The timing module 84 is used to time the on-time of the switching device 7.

[0130] The on-time of the switching device 7 is timed to determine the start time of the auxiliary heat exchanger. The auxiliary heat exchanger can be turned off after the auxiliary heat exchanger is started for a certain time.

[0131] In the example of Figure 5 , the air conditioning device comprises an outdoor environment temperature detection module 81, a compressor suction pressure detection module 82, a compressor discharge pressure detection module 83, and a control module 9.

[0132] The outdoor environment temperature detection module 81 is used to detect the outdoor environment temperature.

[0133] The compressor suction pressure detection module 82 is used to detect the compressor suction pressure.

[0134] The compressor discharge pressure detection module 83 is used to detect the compressor discharge pressure.

[0135] The control module 9 is used to receive the outdoor environment temperature, the compressor discharge pressure, and the compressor suction pressure, and to output a control signal to the switching device 7.

[0136] The outdoor environment temperature, the compressor suction pressure, and the compressor discharge pressure are collected, and the state of the switching device is controlled to ensure that the start and stop of the auxiliary heat exchanger meet the requirements. When the requirements are met, the switching device 7 is turned on to start the auxiliary heat exchanger. When the requirements are not met, the switching device 7 is turned off to turn off the auxiliary heat exchanger.

[0137] In the refrigeration mode, when the outdoor environment temperature is greater than a first set temperature and the compressor discharge pressure is greater than a discharge set pressure for a set time, or the outdoor environment temperature is greater than a second set temperature for a set time, the control module controls the switching device 7 to be turned on, and the auxiliary heat exchanger works. When the outdoor environment temperature is less than the first set temperature, or the compressor discharge pressure is less than the discharge set pressure, or the switching device 7 is turned on for more than a set on-time, the control module controls the switching device 7 to be turned off, and the auxiliary heat exchanger does not work.

[0138] In the heating mode, when the outdoor ambient temperature is less than the third set temperature and the suction pressure of the compressor is less than the suction set pressure for a set time, the control module controls the switch device 7 to be turned on, and the auxiliary heat exchanger works. When the outdoor ambient temperature is greater than the third set temperature or the suction pressure of the compressor is greater than the suction set pressure or the switch device 7 is turned on for more than the set on time, the control module controls the switch device 7 to be turned off, and the auxiliary heat exchanger does not work.

[0139] In Figure 6 In the example, the control process of the air conditioning device is as follows:

[0140] S1, start. Enter S12 or S22.

[0141] S12, heating mode.

[0142] S13, detect the outdoor ambient temperature and the suction pressure.

[0143] S14, meet the heating mode auxiliary heat exchanger opening condition.

[0144] S15, turn on the switch device, start timing, and detect the outdoor ambient temperature and the suction pressure.

[0145] S16, meet the heating mode auxiliary heat exchanger closing condition.

[0146] S17, turn off the switch device and clear the timing module. Enter step S13.

[0147] S22, cooling mode.

[0148] S23, detect the outdoor ambient temperature and the discharge pressure.

[0149] S24, meet the cooling mode auxiliary heat exchanger opening condition.

[0150] S25, turn on the switch device, start timing, and detect the outdoor ambient temperature and the discharge pressure.

[0151] S26, meet the cooling mode auxiliary heat exchanger closing condition.

[0152] S27, turn off the switch device and clear the timing module. Enter step S23.

[0153] In some embodiments, the bottom auxiliary heat exchanger 62 under the outdoor heat exchanger is connected to the four-way valve 2 and the indoor heat exchanger 5 through the switch device separately from the auxiliary heat exchanger in other parts.

[0154] The start and stop of the auxiliary heat exchanger under the outdoor heat exchanger 3 and the auxiliary heat exchanger in other parts can be controlled separately, so that in winter heating, only when icing occurs under the outdoor heat exchanger 3, the auxiliary heat exchanger under the outdoor heat exchanger 3 is turned on alone.

[0155] In Figures 7-10 In the example of FIG. 1, the side auxiliary heat exchanger 61 is connected to the four-way valve 2 and the indoor heat exchanger 5 through the first switching device 71.

[0156] The bottom auxiliary heat exchanger 62 is connected to the four-way valve 2 and the indoor heat exchanger 5 through the second switching device 72.

[0157] The states of the first switching device 71 and the second switching device 72 can be controlled according to requirements to control whether the side auxiliary heat exchanger 61 and the bottom auxiliary heat exchanger 62 are connected to the refrigerant circulation loop.

[0158] This embodiment is particularly suitable for the heating mode. When the bottom of the outdoor heat exchanger 3 is frosted / iced, only the bottom auxiliary heat exchanger 62 can be turned on; when the outdoor heat exchanger 3 is prevented from frosting / icing, the side auxiliary heat exchanger 61 can be turned on, or the side auxiliary heat exchanger 61 and the bottom auxiliary heat exchanger 62 can be turned on at the same time; when the outdoor heat exchanger 3 is defrosted / iced, the side auxiliary heat exchanger 61 and the bottom auxiliary heat exchanger 62 can be turned on at the same time.

[0159] In Figure 11 In the example of FIG. 1, the indoor heat exchanger 5 includes a water pipeline, the inlet of the auxiliary heat exchanger is connected to the water outlet 51 of the water pipeline of the indoor heat exchanger 5 through the switching device 7, and the outlet of the auxiliary heat exchanger is connected to the water inlet 52 of the water pipeline of the indoor heat exchanger 5.

[0160] In Figure 12 In the example of FIG. 1, in summer high-temperature refrigeration, the outdoor heat exchanger 3 serves as a condenser, the indoor heat exchanger 5 serves as an evaporator, the water outlet of the water pipeline of the indoor heat exchanger 5 is low-temperature water, and the low-temperature water drawn from the water pipeline enters the auxiliary heat exchanger, thereby reducing the temperature near the outdoor heat exchanger 3 and improving the refrigeration capacity of the air conditioning device.

[0161] In Figure 13 In the example of FIG. 1, in winter heating, the outdoor heat exchanger 3 serves as an evaporator, the indoor heat exchanger 5 serves as a condenser, the water outlet of the water pipeline of the indoor heat exchanger 5 is high-temperature water, and the high-temperature water drawn from the water pipeline enters the auxiliary heat exchanger, thereby increasing the temperature near the outdoor heat exchanger 3, preventing the bottom of the outdoor heat exchanger 3 from frosting, reducing the frosting on the surface of the outdoor heat exchanger 3, improving the heating capacity of the air conditioning device, and enhancing the comfort of users.

[0162] In some embodiments, the side auxiliary heat exchanger 61 is connected to the water outlet 51 of the water pipeline of the indoor heat exchanger 5 through the first switching device.

[0163] The bottom auxiliary heat exchanger 62 is connected to the water outlet 51 of the water pipeline of the indoor heat exchanger 5 through the second switching device.

[0164] In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0165] The above merely describes specific embodiments of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An air conditioning device comprising a compressor, a four-way valve, an outdoor heat exchanger, an expansion valve, an indoor heat exchanger and an auxiliary heat exchanger; characterized in that, the auxiliary heat exchanger comprises: an auxiliary heat exchanger body, which is close to the outdoor heat exchanger and provides energy for the outdoor heat exchanger; an outlet and an inlet on the auxiliary heat exchanger body; the inlet is connected to the four-way valve and the indoor heat exchanger through a switching device; and the outlet is connected to the four-way valve and the compressor return air port; or, the indoor heat exchanger comprises a water pipe, the inlet is connected to the water outlet of the water pipe through a switching device, and the outlet is connected to the water inlet of the water pipe.

2. The air conditioning apparatus according to claim 1, wherein the four-way valve comprises: a D interface for connecting the compressor exhaust port; an E interface for connecting the indoor heat exchanger; a C interface for connecting the outdoor heat exchanger; an S interface for connecting the compressor return air port; the inlet is connected to the E interface of the four-way valve and the indoor heat exchanger through the switching device; the outlet is connected to the S interface of the four-way valve and the compressor return air port.

3. The air conditioning apparatus according to claim 1, wherein The auxiliary heat exchanger is located on the side of the outdoor heat exchanger, and / or the auxiliary heat exchanger is located below the outdoor heat exchanger, and / or the auxiliary heat exchanger is located above the outdoor heat exchanger.

4. The air conditioning apparatus according to claim 3, wherein The auxiliary heat exchanger comprises: a sheet metal; a refrigerant pipe arranged on the sheet metal.

5. The air conditioning apparatus according to claim 4, wherein The sheet metal is the shell of the outdoor unit.

6. The air conditioning apparatus according to claim 3, wherein The auxiliary heat exchanger below the outdoor heat exchanger and the auxiliary heat exchanger at other positions are respectively connected to the four-way valve and the indoor heat exchanger through the switching device; or, the auxiliary heat exchanger below the outdoor heat exchanger and the auxiliary heat exchanger at other positions are respectively connected to the water outlet of the water pipe through the switching device.

7. The air conditioning apparatus according to claim 1, wherein The outdoor heat exchanger does not have a supercooling section.

8. The air conditioning apparatus according to claim 1, wherein The air conditioning device comprises: an outdoor fan, which is configured to run at a maximum speed or a maximum speed gear when the switching device is turned on.

9. The air conditioning apparatus according to claim 1, wherein The air conditioning device comprises: a timing module for timing the on time of the switching device.

10. The air conditioning apparatus according to any one of claims 1 through 9, wherein The air conditioning device comprises: an outdoor environment temperature detection module for detecting the outdoor environment temperature; a compressor suction pressure detection module for detecting the compressor suction pressure; a compressor discharge pressure detection module for detecting the compressor discharge pressure; a control module for receiving the outdoor environment temperature, the compressor discharge pressure and the compressor suction pressure, and for outputting a control signal to the switching device.

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