Air conditioner indoor unit and air conditioner system

Abstract

The utility model discloses an air-conditioning indoor unit and an air-conditioning system, the air-conditioning indoor unit is used for being connected with an air-conditioning outdoor unit, the air-conditioning outdoor unit comprises a compressor, and the air-conditioning indoor unit comprises a first shell and a second shell, the heat exchange and refrigeration assembly is contained in the first shell, an air inlet and an air outlet are formed in the first shell, and the heat exchange and refrigeration assembly is used for recycling hot air flow exhausted by external equipment through the air inlet, conducting heat exchange on the hot air flow to generate cold air and then sending the cold air to the external equipment through the air outlet; the low-temperature assembly is contained in the first shell, the low-temperature assembly is connected with the heat exchange and refrigeration assembly and the compressor, and the low-temperature assembly is used for storing the liquid refrigerant output by the compressor and outputting the liquid refrigerant to the heat exchange and refrigeration assembly; the heat exchange refrigeration assembly is connected with the compressor and further used for cooling the liquid refrigerant and then outputting the liquid refrigerant to the compressor. According to the utility model, the low-temperature assembly is integrated in the indoor unit, so that the installation space is not occupied, and the space utilization rate is improved.

Description

Technical Field

[0001] The utility model relates to the field of air conditioning, in particular to an air conditioning indoor unit and an air conditioning system. Background Art

[0002] To maintain the normal operating temperature of data center servers, refrigeration equipment is required to cool and dissipate heat from the servers. Currently, the most common refrigeration equipment used in data centers is computer room air conditioners, which are generally installed in racks or in-row configurations. This means the indoor unit of the air conditioner is installed in a standard server cabinet. Conventional rack-mounted or in-row air conditioners cannot operate properly in temperatures below -20°C. They require separate low-temperature components to be installed outside the data center computer room. This takes up space in the computer room and places higher demands on the installation space. Some relatively small computer rooms lack sufficient space for separate low-temperature components. Summary of the Invention

[0003] The main purpose of the utility model is to provide an air-conditioning indoor unit and an air-conditioning system, aiming to integrate low-temperature components into the indoor unit, eliminating the need to occupy installation space and improving space utilization.

[0004] To achieve the above-mentioned purpose, the air-conditioning indoor unit proposed in the present invention is used to be connected to the air-conditioning outdoor unit, the air-conditioning outdoor unit includes a compressor, and the air-conditioning indoor unit includes:

[0005] a first shell, wherein the first shell is formed with an accommodating cavity;

[0006] a heat exchange refrigeration component housed in the first housing, the first housing being provided with an air inlet and an air outlet, the heat exchange refrigeration component being configured to recover hot air exhausted by an external device through the air inlet, perform heat exchange on the hot air to generate cold air, and then deliver the cold air to the external device through the air outlet;

[0007] a low-temperature component housed in the first housing, the low-temperature component being connected to the heat exchange refrigeration component and further connected to the compressor, and being used to store liquid refrigerant output by the compressor and output it to the heat exchange refrigeration component;

[0008] The heat exchange refrigeration component is connected to the compressor, and the heat exchange refrigeration component is also used to cool the liquid refrigerant and then output it to the compressor.

[0009] Optionally, the heat exchange refrigeration component includes:

[0010] an evaporator housed in the first housing, the evaporator being connected to the low-temperature component and also connected to the compressor, the evaporator being used to cool the liquid refrigerant output by the low-temperature component before outputting it to the compressor, the evaporator being further used to recover hot air discharged from an external device through an air inlet, and to perform heat exchange on the hot air to generate cold air;

[0011] The fan is accommodated in the first shell and is used to send the cold air generated by the evaporator to external equipment through an air outlet.

[0012] Optionally, the cryogenic component includes:

[0013] a liquid storage tank accommodated in the first shell, the liquid inlet end of the liquid storage tank being connected to the compressor, the liquid outlet end of the liquid storage tank being connected to the heat exchange refrigeration component, and the liquid storage tank being used to store the liquid refrigerant output by the compressor and output it to the heat exchange refrigeration component;

[0014] a one-way valve, disposed on the liquid inlet pipeline of the liquid storage tank, the one-way valve being used to allow the liquid refrigerant output by the compressor to flow in one direction to the liquid storage tank;

[0015] a solenoid valve, provided on the liquid outlet pipeline of the liquid storage tank, for controlling the liquid outlet of the liquid storage tank;

[0016] a sight glass, arranged at a preset height position of the liquid storage tank;

[0017] A safety valve is provided on the upper portion of the liquid storage tank and is used to relieve pressure in the liquid storage tank.

[0018] Optionally, the air conditioner indoor unit further includes:

[0019] A system pipeline high-pressure pressure sensor is provided on the high-pressure side of the system pipeline in the air-conditioning indoor unit, and is used to detect the pressure value on the high-pressure side of the system pipeline and output a high-pressure detection signal;

[0020] A system pipeline low-pressure pressure sensor is provided on the low-pressure side of the system pipeline in the air-conditioning indoor unit, and is used to detect the pressure value on the low-pressure side of the system pipeline and output a low-pressure detection signal;

[0021] A control component is accommodated in the first shell, the input end of the control component is respectively connected to the system pipeline high-pressure pressure sensor and the system pipeline low-pressure pressure sensor, and the output end of the control component is connected to the solenoid valve. The control component is configured to control the solenoid valve to close when the real-time pressure difference value is determined to be less than the starting pressure difference value based on the high-pressure detection signal and the low-pressure detection signal, or to control the solenoid valve to open when the real-time pressure difference value is determined to be greater than or equal to the starting pressure difference value based on the high-pressure detection signal and the low-pressure detection signal.

[0022] Optionally, the control component further includes:

[0023] an electric control box, which is flexibly disposed in the first shell, and the electric control box is formed with an accommodating cavity;

[0024] A timer is arranged in the electric control box;

[0025] a controller disposed in the electric control box, the controller being connected to the timer, the controller being configured to control the timer to start timing when controlling the solenoid valve to be closed, and to control the solenoid valve to be opened when receiving a timing trigger signal output by the timer or when the real-time pressure difference value is greater than or equal to a first preset pressure value, or when the low pressure value is determined to be less than or equal to a second preset pressure value according to the low pressure detection signal;

[0026] The controller is further configured to control the timer to start timing when controlling the solenoid valve to open, and control the solenoid valve to close when receiving a timing trigger signal output by the timer or the real-time pressure difference value is less than a third preset pressure value, or when determining, according to the low pressure detection signal, that the low pressure value is greater than a fourth preset pressure value;

[0027] The controller is further configured to control the solenoid valve to remain open when the real-time pressure difference value is greater than or equal to a fifth preset pressure value and the high pressure value is determined to be greater than a sixth preset pressure value according to the high pressure detection signal.

[0028] Optionally, the cryogenic component further comprises:

[0029] A low-temperature component high-pressure pressure sensor is arranged on the liquid outlet pipeline of the liquid storage tank. The low-temperature component high-pressure pressure sensor is connected to the low-temperature pressure end of the controller. The low-temperature component high-pressure pressure sensor is used to detect the pressure value on the liquid outlet pipeline of the liquid storage tank and output a low-temperature component pressure detection signal to the controller. The controller is configured to control the solenoid valve to open when it is determined that the pressure value of the low-temperature component is greater than or equal to the warning pressure value according to the low-temperature component pressure detection signal, or to control the solenoid valve to close when it is determined that the pressure value of the low-temperature component is less than the warning pressure value according to the low-temperature component pressure detection signal.

[0030] Optionally, the air conditioner indoor unit further includes:

[0031] a gas pipe temperature sensor, disposed on the gas pipe of the air conditioner indoor unit, connected to the gas pipe temperature terminal of the controller, configured to detect the temperature of the gas pipe and output a gas pipe temperature signal to the controller, wherein the controller is configured to output a gas pipe alarm signal when determining that the gas pipe is over-temperature based on the gas pipe temperature signal;

[0032] A liquid pipe temperature sensor is provided on the liquid pipe of the air conditioner indoor unit. The liquid pipe temperature sensor is connected to the liquid pipe temperature end of the controller. The liquid pipe temperature sensor is used to detect the temperature of the liquid pipe and output a liquid pipe temperature signal to the controller. The controller is also used to output a liquid pipe alarm signal when it is determined that the liquid pipe is overheated according to the liquid pipe temperature signal.

[0033] Optionally, the air conditioner indoor unit further includes:

[0034] a gas-side shut-off valve, disposed on the first housing, the gas-side shut-off valve being connected between the compressor and the heat exchange refrigeration assembly, and being used to shut off the gas passage between the compressor and the heat exchange refrigeration assembly when the gas-side shut-off valve is closed;

[0035] The liquid side stop valve is arranged on the first shell, and the liquid side stop valve is connected between the compressor and the low temperature component. The liquid side stop valve is used to cut off the liquid passage between the compressor and the low temperature component when closed.

[0036] The present invention further provides an air-conditioning system, comprising an air-conditioning outdoor unit and the air-conditioning indoor unit as described above, wherein the air-conditioning outdoor unit is connected to the air-conditioning indoor unit.

[0037] Optionally, the air-conditioning outdoor unit includes:

[0038] a second shell, wherein the second shell is formed with an accommodating cavity;

[0039] a compressor housed in the second housing, the compressor being connected to a heat exchange refrigeration component in the air conditioner indoor unit, the compressor being configured to compress the liquid refrigerant outputted by the heat exchange refrigeration component into gas for output;

[0040] The condenser is housed in the second shell, the condenser is connected to the compressor, and the condenser is also connected to the low-temperature component in the air-conditioning indoor unit. The condenser is used to cool the compressed output gas into liquid refrigerant and then output it to the low-temperature component.

[0041] The technical solution of the present utility model comprises an air conditioner indoor unit comprising a first housing, a heat exchange refrigeration assembly, and a low-temperature assembly, wherein the first housing is formed with a receiving cavity; the heat exchange refrigeration assembly is accommodated in the first housing, and the first housing is provided with an air inlet and an air outlet. The heat exchange refrigeration assembly is used to recover hot air discharged from an external device through the air inlet, and after heat exchange with the hot air to generate cold air, the cold air is delivered to the external device through the air outlet; the low-temperature assembly is accommodated in the first housing, connected to the heat exchange refrigeration assembly, and also connected to a compressor, and is used to store liquid refrigerant output by the compressor and output it to the heat exchange refrigeration assembly; the heat exchange refrigeration assembly is connected to the compressor, and is also used to cool the liquid refrigerant before outputting it to the compressor. This solution integrates the low-temperature assembly module with the indoor unit in an integrated design, eliminating the need for separate piping and wiring of the low-temperature assembly, thereby improving on-site construction efficiency. In addition, the built-in design of the low-temperature assembly eliminates the need for separate installation space, thereby improving on-site space utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0043] Figure 1 This is a structural diagram of an embodiment of an air-conditioning indoor unit of the present utility model;

[0044] Figure 2 This is a structural diagram of another embodiment of the air-conditioning indoor unit of the utility model;

[0045] Figure 3 This is a structural diagram of another embodiment of the air-conditioning indoor unit of the present utility model;

[0046] Figure 4 This is a structural diagram of another embodiment of the air-conditioning indoor unit of the present utility model;

[0047] Figure 5 This is a schematic diagram of the functional modules of an embodiment of the air-conditioning system of the present invention.

[0048] Explanation of the accompanying reference numerals: 10. First shell; 21. Fan; 22. Evaporator; 31. Liquid storage tank; 32. One-way valve; 33. Solenoid valve; 34. Sight glass; 35. Safety valve; 40. System pipeline high-pressure pressure sensor; 50. System pipeline low-pressure pressure sensor; 60. Low-temperature component high-pressure pressure sensor; 71. Electric control box; 72. Controller; 81. Gas pipe temperature sensor; 82. Liquid pipe temperature sensor; 91. Gas side stop valve; 92. Liquid side stop valve.

[0049] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0051] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0052] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features specified as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0053] To maintain the normal operating temperature of data center servers, refrigeration equipment is required to cool and dissipate heat from the servers. Currently, the most common refrigeration equipment used in data centers is computer room air conditioners, which are generally installed in racks or in-row configurations. This means the indoor unit of the air conditioner is installed in a standard server cabinet. Conventional rack-mounted or in-row air conditioners cannot operate properly in temperatures below -20°C. They require separate low-temperature components to be installed outside the data center computer room. This takes up space in the computer room and places higher demands on the installation space. Some relatively small computer rooms lack sufficient space for separate low-temperature components.

[0054] In order to solve the above problems, the present invention provides an air-conditioning indoor unit, which is used to be connected to an air-conditioning outdoor unit, and the air-conditioning outdoor unit includes a compressor.

[0055] Reference Figures 1 to 4 In one embodiment, the air conditioner indoor unit includes:

[0056] A first housing 10, wherein the first housing 10 is formed with an accommodating cavity;

[0057] A heat exchange and refrigeration component is housed in the first housing 10. The first housing 10 is provided with an air inlet and an air outlet. The heat exchange and refrigeration component is used to recover hot air discharged from the external device through the air inlet, exchange heat with the hot air to generate cold air, and then send the cold air to the external device through the air outlet.

[0058] A low-temperature component is housed in the first housing 10, the low-temperature component is connected to the heat exchange refrigeration component, and the low-temperature component is also connected to the compressor, and is used to store the liquid refrigerant output by the compressor and output it to the heat exchange refrigeration component;

[0059] The heat exchange refrigeration component is connected to the compressor, and the heat exchange refrigeration component is also used to cool the liquid refrigerant and then output it to the compressor.

[0060] In this embodiment, the first housing 10 can be used to fix the positional relationship between the heat exchange and refrigeration assembly and the low-temperature assembly within the air conditioner indoor unit, ensuring safety and stability within the housing formed by the first housing 10 of the air conditioner indoor unit. When the air conditioner indoor unit is operating, the positional relationship between the heat exchange and refrigeration assembly and the low-temperature assembly remains unchanged, ensuring the normal operation of the air conditioner indoor unit. The heat exchange and refrigeration assembly can be composed of components such as a fan 21 and an evaporator 22. The fan 21 enables air circulation. Air enters through the air inlet, is sucked in by the fan 21, and is discharged from the air outlet, forming an air flow. The evaporator 22 provides a cooling effect by converting liquid refrigerant into gas, thereby absorbing heat from the air and lowering the air temperature. The cold air blown out by the heat exchange and refrigeration assembly can be sent to external devices to cool the external devices, such as data center servers. The low-temperature component can be composed of a liquid storage tank 31 and multiple valves. The liquid storage tank 31 can store the liquid refrigerant output by the compressor. The liquid refrigerant can be output to the heat exchange refrigeration component through multiple valves. The valves can also prevent the liquid refrigerant from flowing back. By controlling the opening and closing of the valve by the controller 72 under different circumstances, the working condition of the air-conditioning indoor unit can also be kept stable. For example, if the pressure in the liquid storage tank 31 is too high, the valve between the liquid storage tank 31 and the heat exchange refrigeration component can be opened to output the liquid refrigerant to the heat exchange refrigeration component to reduce the pressure of the liquid storage tank 31. In this way, this embodiment integrates the low-temperature component module and the indoor unit into an integrated design, which can realize modular factory delivery, and the installation and debugging are consistent with the standard model. There is no need to separately connect the pipes and wiring of the low-temperature component, vacuum and add refrigerant, etc., which can effectively improve the construction efficiency of the project; at the same time, the air-conditioning indoor unit with a built-in low-temperature component module can be pre-filled with refrigerant and debugged online during factory settings to ensure that the factory wiring and debugging are qualified, thereby reducing the error rate of on-site project installation; in addition, the built-in design of the low-temperature component does not need to occupy a separate installation space, thereby improving the on-site space utilization rate, and the rack-mounted air conditioner is assembled with the cabinet at the factory, without the need for disassembly and assembly, which is convenient and efficient.

[0061] The present invention comprises an air conditioner indoor unit comprising a first housing 10, a heat exchange refrigeration assembly, and a low-temperature assembly. The first housing 10 is provided with a receiving cavity. The heat exchange refrigeration assembly is accommodated within the first housing 10 and is provided with an air inlet and an air outlet. The heat exchange refrigeration assembly is configured to recover hot air discharged from an external device through the air inlet, heat the hot air to generate cold air, and then deliver the cold air to the external device through the air outlet. The low-temperature assembly is accommodated within the first housing 10 and is connected to the heat exchange refrigeration assembly. The low-temperature assembly is also connected to a compressor and is configured to store liquid refrigerant output by the compressor and output it to the heat exchange refrigeration assembly. The heat exchange refrigeration assembly is also configured to cool the liquid refrigerant before outputting it to the compressor. This solution integrates the low-temperature assembly module with the indoor unit, eliminating the need for separate piping and wiring of the low-temperature assembly, thereby improving on-site construction efficiency. Furthermore, the built-in design of the low-temperature assembly eliminates the need for separate installation space, thereby improving on-site space utilization.

[0062] Reference Figures 1 to 2 In one embodiment, the heat exchange refrigeration component includes:

[0063] an evaporator 22 housed in the first housing 10, the evaporator 22 being connected to the low-temperature component and also to the compressor. The evaporator 22 is configured to cool the liquid refrigerant outputted by the low-temperature component and then output it to the compressor. The evaporator 22 is also configured to recover hot air discharged from external equipment through an air inlet and perform heat exchange on the hot air to generate cold air;

[0064] The fan 21 is housed in the first housing 10 and is used to send the cold air generated by the evaporator 22 to external equipment through an air outlet.

[0065] In this embodiment, the primary function of the evaporator 22 is to convert liquid refrigerant into gas, thereby absorbing heat from the air and lowering the air temperature. Liquid refrigerant flows through the evaporator 22. The low-temperature, low-pressure liquid refrigerant absorbs heat from the surrounding air and evaporates into gas. As air flows over the cooling surface of the evaporator 22, the air's heat is transferred to the liquid refrigerant, thereby lowering the air temperature. The evaporator 22 can be a coil-and-tube evaporator 22 or a fin-type evaporator 22. The primary function of the fan 21 is to circulate indoor air, facilitating air flow within the air conditioner indoor unit and distributing air passing through the evaporator 22 to external devices. Specifically, the fan 21 can be an axial flow fan 21. The fan 21 module can be located at the front end of the air conditioner indoor unit. It delivers cool air into the cold air duct through two air outlets, cooling the external devices. The hot air exhausted from the external devices then passes through the air inlet of the air conditioner indoor unit, exchanging heat with the evaporator 22, in a continuous cycle. Furthermore, a filter can be provided at the air inlet to filter the hot air exhausted from the external devices.

[0066] Reference Figures 1 to 2 In one embodiment, the cryogenic component comprises:

[0067] A liquid storage tank 31 is housed in the first housing 10. The liquid inlet of the liquid storage tank 31 is connected to the compressor, and the liquid outlet of the liquid storage tank 31 is connected to the heat exchange refrigeration component. The liquid storage tank 31 is used to store the liquid refrigerant output by the compressor and output it to the heat exchange refrigeration component.

[0068] A one-way valve 32 is provided on the liquid inlet pipe of the liquid storage tank 31 , and is used to allow the liquid refrigerant output by the compressor to flow to the liquid storage tank 31 in one direction;

[0069] The solenoid valve 33 is provided on the liquid outlet pipeline of the liquid storage tank 31 and is used to control the liquid outlet of the liquid storage tank 31;

[0070] a sight glass 34, arranged at a preset height position of the liquid storage tank 31;

[0071] The safety valve 35 is provided on the upper portion of the liquid storage tank 31 , and is used to relieve pressure from the liquid storage tank 31 .

[0072] In this embodiment, the low-temperature component can be composed of a liquid storage tank 31, a one-way valve 32, a solenoid valve 33, a sight glass 34 and a safety valve 35; wherein the liquid storage tank 31 can be used to store liquid refrigerant, and is used to provide sufficient liquid refrigerant to support the compressor in the air-conditioning outdoor unit to establish a high and low pressure cycle when the air-conditioning is started and running in an ultra-low temperature environment on the outdoor side. The liquid storage tank 31 can be installed on the liquid side pipeline of the air-conditioning indoor unit; the main function of the one-way valve 32 is to ensure that the refrigerant in the liquid storage tank 31 will not flow back to the compressor after the compressor of the air-conditioning outdoor unit stops; the function of the solenoid valve 33 is to ensure that the air-conditioning After the compressor stops, the refrigerant in the liquid storage tank 31 can be stored in the liquid storage tank 31 and will not flow out from the outlet end of the liquid storage tank 31; the sight glass 34 can be installed at the 2 / 3 height position of the liquid storage tank 31 to check the liquid level of the liquid storage tank 31, which is convenient for on-site refrigerant filling to check whether it is appropriate. It can also be installed at other height positions, and the specific installation can be based on actual conditions and user needs; the safety valve 35 can be installed at the upper part of the liquid storage tank 31, mainly for relieving the pressure of the liquid storage tank 31, which can prevent the internal pressure of the low-temperature component liquid storage tank 31 from being too high, leading to possible risks such as pipeline rupture. The solenoid valve 33 and the safety valve 35 can be controlled by the controller 72.

[0073] Reference Figures 1 to 2 In one embodiment, the air conditioner indoor unit further includes:

[0074] A system pipeline high-pressure pressure sensor 40 is provided on the high-pressure side of the system pipeline in the air conditioner indoor unit. The system pipeline high-pressure pressure sensor 40 is used to detect the pressure value on the high-pressure side of the system pipeline and output a high-pressure detection signal;

[0075] The system pipeline low-pressure pressure sensor 50 is provided on the low-pressure side of the system pipeline in the air-conditioning indoor unit. The system pipeline low-pressure pressure sensor 50 is used to detect the pressure value on the low-pressure side of the system pipeline and output a low-pressure detection signal;

[0076] A control component is housed in the first shell 10, the input end of the control component is respectively connected to the system pipeline high-pressure pressure sensor 40 and the system pipeline low-pressure pressure sensor 50, and the output end of the control component is connected to the solenoid valve 33. The control component is configured to control the solenoid valve 33 to close when the real-time pressure difference value is determined to be less than the starting pressure difference value according to the high-pressure detection signal and the low-pressure detection signal, or to control the solenoid valve 33 to open when the real-time pressure difference value is determined to be greater than or equal to the starting pressure difference value according to the high-pressure detection signal and the low-pressure detection signal.

[0077] In this embodiment, the system pipeline high-pressure pressure sensor 40 can be used to detect the operating pressure on the high-pressure side of the system pipeline. When the operating pressure is too high, a high-pressure warning is issued in time, the system is shut down, and the pipeline is protected from overpressure, bursting, and leaking, thereby ensuring system safety. The system pipeline low-pressure pressure sensor 50 can be used to detect the operating pressure on the low-pressure side of the system pipeline. When the pressure is too low, a shutdown protection is performed to prevent the compressor from idling and possibly burning. When the compressor starts, the controller 72 can open the solenoid valve 33 for a preset time and determine whether the real-time pressure difference between the high-pressure pressure sensor and the low-pressure pressure sensor is higher than the starting pressure difference value; the preset time and the starting pressure difference value can be set according to actual conditions and user needs; if the real-time pressure difference value is greater than or equal to the starting pressure difference value, the solenoid valve 33 is kept open; if the real-time pressure difference value is less than the starting pressure difference value, the solenoid valve 33 is closed.

[0078] Reference Figures 1 to 4 In one embodiment, the control component further includes:

[0079] An electric control box 71 is retractably disposed in the first housing 10 , and the electric control box 71 is formed with a receiving cavity;

[0080] A timer is provided in the electric control box 71;

[0081] a controller 72 disposed in the electrical control box 71 and connected to the timer. The controller 72 is configured to control the timer to start timing when the solenoid valve 33 is controlled to be closed, and to control the solenoid valve 33 to open when receiving a timing trigger signal output by the timer or when the real-time pressure difference value is greater than or equal to a first preset pressure value, or when the low pressure value is determined to be less than or equal to a second preset pressure value according to the low pressure detection signal;

[0082] The controller 72 is further configured to control the timer to start timing when the solenoid valve 33 is controlled to be open, and control the solenoid valve 33 to be closed when a timing trigger signal output by the timer is received or the real-time pressure difference value is less than a third preset pressure value, or when the low pressure value is determined to be greater than a fourth preset pressure value according to the low pressure detection signal;

[0083] The controller 72 is further configured to control the solenoid valve 33 to remain open when the real-time pressure difference value is greater than or equal to a fifth preset pressure value and the high pressure value is determined to be greater than a sixth preset pressure value according to the high pressure detection signal.

[0084] In this embodiment, the electric control box 71 is retractably disposed within the first housing 10, making it easy to maintain and debug components such as the controller 72. The controller 72 may be a digital signal processor (DSP), a programmable logic device (PLD), a field programmable gate array (FPGA), a microprocessor, an MCU, or other electronic components. When the solenoid valve 33 is closed, the controller 72 can control the timer to start timing. The timing trigger time of the timer can be 5 seconds, or it can be set according to actual conditions and user needs. If the controller 72 detects that the real-time pressure difference value is greater than or equal to the first preset pressure value, or determines that the low pressure value is less than or equal to the second preset pressure value according to the low pressure detection signal, or the solenoid valve 33 remains closed for 5 seconds, the solenoid valve 33 is controlled to open for 5 seconds. When the controller 72 controls the solenoid valve 33 to open, it also controls the timer to start timing. If it receives the timing trigger signal output by the timer, or the real-time pressure difference value is less than the third preset pressure value, or determines that the low pressure value is greater than the fourth preset pressure value according to the low pressure detection signal, the solenoid valve 33 is controlled to close. The controller 72 can also control the solenoid valve 33 to remain open when the real-time pressure difference value is greater than or equal to the fifth preset pressure value and the high pressure value is greater than the sixth preset pressure value according to the high pressure detection signal. The first preset pressure value, the second preset pressure value, the third preset pressure value, the fourth preset pressure value, the fifth preset pressure value, and the sixth preset pressure value in this embodiment can be set according to actual conditions and user needs.

[0085] Reference Figures 1 to 2 In one embodiment, the cryogenic component further comprises:

[0086] The low-temperature component high-pressure pressure sensor 60 is arranged on the liquid outlet pipeline of the liquid storage tank 31. The low-temperature component high-pressure pressure sensor 60 is connected to the low-temperature pressure end of the controller 72. The low-temperature component high-pressure pressure sensor 60 is used to detect the pressure value on the liquid outlet pipeline of the liquid storage tank 31 and output a low-temperature component pressure detection signal to the controller 72. The controller 72 is configured to control the solenoid valve 33 to open when it is determined that the pressure value of the low-temperature component is greater than or equal to the warning pressure value according to the low-temperature component pressure detection signal, or to control the solenoid valve 33 to close when it is determined that the pressure value of the low-temperature component is less than the warning pressure value according to the low-temperature component pressure detection signal.

[0087] In this embodiment, the main function of the low-temperature component high-pressure pressure sensor 60 is to protect the low-temperature component. In certain abnormal situations, such as when the compressor fails and cannot provide cooling, and the return air temperature continues to rise, resulting in the pressure of the refrigerant inside the liquid storage tank 31 being too high, part of the refrigerant can be released to the evaporator 22 in advance before the safety valve 35 is released to prevent the safety valve 35 from releasing pressure, resulting in abnormal situations such as insufficient system refrigerant. The low-temperature component high-pressure pressure sensor 60 can also serve as a backup high-pressure pressure detection for the liquid pipe high-pressure pressure sensor. The controller 72 can control the solenoid valve 33 to open when it is determined that the pressure value of the low-temperature component is greater than or equal to the warning pressure value based on the low-temperature component pressure detection signal, or control the solenoid valve 33 to close when it is determined that the pressure value of the low-temperature component is less than the warning pressure value based on the low-temperature component pressure detection signal.

[0088] Furthermore, in an exemplary technology, the controller 72 may also determine whether to enter the high-pressure warning mode based on the low-temperature component pressure detection signal output by the low-temperature component high-pressure pressure sensor 60, thereby controlling the opening or closing of the solenoid valve 33. For example, when the controller 72 determines that the pressure value is greater than or equal to (high-pressure warning value - high-pressure warning frequency reduction deviation) based on the low-temperature component pressure detection signal output by the low-temperature component high-pressure pressure sensor 60, the opening of the electronic expansion valve 23 is determined:

[0089] If the opening degree of the electronic expansion valve 23 is 0, the opening degree of the electronic expansion valve 23 of the corresponding air-conditioning indoor unit is opened to the electronic expansion valve 23 fault opening degree, and the valve step is maintained. At the same time, the solenoid valve 33 of the low-temperature component is opened;

[0090] If the opening of the electronic expansion valve 23 is not 0 steps, the original control adjustment of the electronic expansion valve 23 is maintained, and the frequency reduction strategy is executed. The high-pressure frequency reduction priority of the low-temperature component is higher than the high-pressure frequency reduction priority of the external unit. At this time, the solenoid valve 33 of the low-temperature component remains open; the high-pressure warning value and the high-pressure warning frequency reduction deviation can be set according to actual conditions.

[0091] Reference Figures 1 to 2 In one embodiment, the air conditioner indoor unit further includes:

[0092] a gas pipe temperature sensor 81 disposed on the gas pipe of the air conditioner indoor unit, connected to the gas pipe temperature terminal of the controller 72, configured to detect the temperature of the gas pipe and output a gas pipe temperature signal to the controller 72, and configured to output a gas pipe alarm signal when determining that the gas pipe is over-temperature based on the gas pipe temperature signal;

[0093] The liquid pipe temperature sensor 82 is arranged on the liquid pipe of the air conditioner indoor unit. The liquid pipe temperature sensor 82 is connected to the liquid pipe temperature end of the controller 72. The liquid pipe temperature sensor 82 is used to detect the temperature of the liquid pipe and output a liquid pipe temperature signal to the controller 72. The controller 72 is also used to output a liquid pipe alarm signal when it is determined that the liquid pipe is overheated according to the liquid pipe temperature signal.

[0094] In this embodiment, a gas pipe temperature sensor 81 is set to detect the temperature of the gas pipe of the air-conditioning indoor unit. When the gas pipe temperature exceeds the safe temperature value, it is determined that the gas pipe is overheated, and the controller 72 can output a gas pipe alarm signal to remind the user, and can also control the air conditioner to stop working. The specific safe temperature value can be set according to actual conditions and user needs; a liquid pipe temperature sensor 82 is set to detect the temperature of the liquid pipe of the air-conditioning indoor unit, and its specific function is the same as that of the gas pipe temperature sensor 81.

[0095] Reference Figures 1 to 2 In one embodiment, the air conditioner indoor unit further includes:

[0096] A gas-side shut-off valve 91 is provided on the first housing 10 and is connected between the compressor and the heat exchange refrigeration assembly. The gas-side shut-off valve 91 is used to shut off the gas passage between the compressor and the heat exchange refrigeration assembly when closed.

[0097] The liquid side stop valve 92 is provided on the first shell 10 and is connected between the compressor and the cryogenic component. The liquid side stop valve 92 is used to cut off the liquid passage between the compressor and the cryogenic component when closed.

[0098] In this embodiment, the direction of the connecting pipes of the gas-side shut-off valve 91 and the liquid-side shut-off valve 92 can be tilted downward at a 45° angle, which facilitates the connection. The specific angle can also be set according to actual conditions and user needs. The shut-off valve can shut off the refrigerant circulation. It will not be closed during normal operation of the air conditioner. When repairing the device, it needs to be closed to prevent refrigerant migration. Therefore, the gas-side shut-off valve 91 can cut off the circulation of gaseous refrigerant, while the liquid-side shut-off valve 92 cuts off the circulation of liquid refrigerant. A filter can also be installed between the low-temperature component and the evaporator 22 for filtration.

[0099] The present invention further provides an air conditioning system comprising an outdoor air conditioning unit and the aforementioned indoor air conditioning unit, wherein the outdoor air conditioning unit is connected to the indoor air conditioning unit. It is understood that since the aforementioned indoor air conditioning unit is used in the air conditioning system of the present invention, the embodiments of the air conditioning system of the present invention include all technical solutions of all embodiments of the aforementioned indoor air conditioning unit, and the technical effects achieved are identical, and therefore will not be further elaborated here.

[0100] Reference Figure 5 In one embodiment, the air conditioner outdoor unit includes:

[0101] a second shell, wherein the second shell is formed with an accommodating cavity;

[0102] a compressor housed in the second housing, the compressor being connected to a heat exchange refrigeration component in the air conditioner indoor unit, the compressor being configured to compress the liquid refrigerant outputted by the heat exchange refrigeration component into gas for output;

[0103] The condenser is housed in the second shell, the condenser is connected to the compressor, and the condenser is also connected to the low-temperature component in the air-conditioning indoor unit. The condenser is used to cool the compressed output gas into liquid refrigerant and then output it to the low-temperature component.

[0104] In this embodiment, the function of the second housing can be referenced to that of the first housing 10 in the aforementioned embodiment and will not be further described here. The compressor compresses low-pressure gas into high-pressure gas. By compressing the gas, liquid refrigerant circulates within the air conditioning system, achieving heat exchange. The condenser exchanges heat between the compressed gas and the outside air, releasing heat, cooling it, and converting it into a liquid. At this point, the refrigerant changes state from gas to liquid, achieving a relatively high temperature. The condensed liquid refrigerant can then be transported via pipes to the low-temperature components in the air conditioning indoor unit for storage.

[0105] The above description is merely an optional embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by utilizing the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An air conditioner indoor unit, characterized in that: The air conditioner indoor unit is used to connect to the air conditioner outdoor unit, the air conditioner outdoor unit includes a compressor, and the air conditioner indoor unit includes: a first shell, wherein the first shell is formed with an accommodating cavity; a heat exchange refrigeration component housed in the first housing, the first housing being provided with an air inlet and an air outlet, the heat exchange refrigeration component being configured to recover hot air exhausted by an external device through the air inlet, perform heat exchange on the hot air to generate cold air, and then deliver the cold air to the external device through the air outlet; a low-temperature component housed in the first housing, the low-temperature component being connected to the heat exchange refrigeration component and further connected to the compressor, and being used to store liquid refrigerant output by the compressor and output it to the heat exchange refrigeration component; The heat exchange refrigeration component is connected to the compressor, and the heat exchange refrigeration component is also used to cool the liquid refrigerant and then output it to the compressor.

2. The air conditioner indoor unit according to claim 1, wherein: The heat exchange refrigeration component includes: an evaporator housed in the first housing, the evaporator being connected to the low-temperature component and also connected to the compressor, the evaporator being used to cool the liquid refrigerant output by the low-temperature component before outputting it to the compressor, the evaporator being further used to recover hot air discharged from an external device through an air inlet, and to perform heat exchange on the hot air to generate cold air; The fan is accommodated in the first shell and is used to send the cold air generated by the evaporator to external equipment through an air outlet.

3. The air conditioner indoor unit according to claim 1, wherein: The cryogenic component comprises: a liquid storage tank accommodated in the first shell, the liquid inlet end of the liquid storage tank being connected to the compressor, the liquid outlet end of the liquid storage tank being connected to the heat exchange refrigeration component, and the liquid storage tank being used to store the liquid refrigerant output by the compressor and output it to the heat exchange refrigeration component; a one-way valve, disposed on the liquid inlet pipeline of the liquid storage tank, the one-way valve being used to allow the liquid refrigerant output by the compressor to flow in one direction to the liquid storage tank; a solenoid valve, provided on the liquid outlet pipeline of the liquid storage tank, for controlling the liquid outlet of the liquid storage tank; a sight glass, arranged at a preset height position of the liquid storage tank; A safety valve is provided on the upper portion of the liquid storage tank and is used to relieve pressure in the liquid storage tank.

4. The air conditioner indoor unit according to claim 3, wherein: The air conditioner indoor unit also includes: A system pipeline high-pressure pressure sensor is provided on the high-pressure side of the system pipeline in the air-conditioning indoor unit, and is used to detect the pressure value on the high-pressure side of the system pipeline and output a high-pressure detection signal; A system pipeline low-pressure pressure sensor is provided on the low-pressure side of the system pipeline in the air-conditioning indoor unit, and is used to detect the pressure value on the low-pressure side of the system pipeline and output a low-pressure detection signal; A control component is accommodated in the first shell, the input end of the control component is respectively connected to the system pipeline high-pressure pressure sensor and the system pipeline low-pressure pressure sensor, and the output end of the control component is connected to the solenoid valve. The control component is configured to control the solenoid valve to close when the real-time pressure difference value is determined to be less than the starting pressure difference value based on the high-pressure detection signal and the low-pressure detection signal, or to control the solenoid valve to open when the real-time pressure difference value is determined to be greater than or equal to the starting pressure difference value based on the high-pressure detection signal and the low-pressure detection signal.

5. The air conditioner indoor unit according to claim 4, wherein: The control component also includes: an electric control box, which is flexibly disposed in the first shell, and the electric control box is formed with an accommodating cavity; A timer is arranged in the electric control box; a controller disposed in the electric control box, the controller being connected to the timer, the controller being configured to control the timer to start timing when controlling the solenoid valve to be closed, and to control the solenoid valve to be opened when receiving a timing trigger signal output by the timer or when the real-time pressure difference value is greater than or equal to a first preset pressure value, or when the low pressure value is determined to be less than or equal to a second preset pressure value according to the low pressure detection signal; The controller is further configured to control the timer to start timing when controlling the solenoid valve to open, and control the solenoid valve to close when receiving a timing trigger signal output by the timer or the real-time pressure difference value is less than a third preset pressure value, or when determining, according to the low pressure detection signal, that the low pressure value is greater than a fourth preset pressure value; The controller is further configured to control the solenoid valve to remain open when the real-time pressure difference value is greater than or equal to a fifth preset pressure value and the high pressure value is determined to be greater than a sixth preset pressure value according to the high pressure detection signal.

6. The air conditioner indoor unit according to claim 5, wherein: The cryogenic assembly further comprises: A low-temperature component high-pressure pressure sensor is arranged on the liquid outlet pipeline of the liquid storage tank. The low-temperature component high-pressure pressure sensor is connected to the low-temperature pressure end of the controller. The low-temperature component high-pressure pressure sensor is used to detect the pressure value on the liquid outlet pipeline of the liquid storage tank and output a low-temperature component pressure detection signal to the controller. The controller is configured to control the solenoid valve to open when it is determined that the pressure value of the low-temperature component is greater than or equal to the warning pressure value according to the low-temperature component pressure detection signal, or to control the solenoid valve to close when it is determined that the pressure value of the low-temperature component is less than the warning pressure value according to the low-temperature component pressure detection signal.

7. The air conditioner indoor unit according to claim 5, wherein: The air conditioner indoor unit also includes: a gas pipe temperature sensor, disposed on the gas pipe of the air conditioner indoor unit, connected to the gas pipe temperature terminal of the controller, configured to detect the temperature of the gas pipe and output a gas pipe temperature signal to the controller, wherein the controller is configured to output a gas pipe alarm signal when determining that the gas pipe is over-temperature based on the gas pipe temperature signal; A liquid pipe temperature sensor is provided on the liquid pipe of the air conditioner indoor unit. The liquid pipe temperature sensor is connected to the liquid pipe temperature end of the controller. The liquid pipe temperature sensor is used to detect the temperature of the liquid pipe and output a liquid pipe temperature signal to the controller. The controller is also used to output a liquid pipe alarm signal when it is determined that the liquid pipe is overheated according to the liquid pipe temperature signal.

8. The air conditioner indoor unit according to claim 1, wherein: The air conditioner indoor unit also includes: a gas-side shut-off valve, disposed on the first housing, the gas-side shut-off valve being connected between the compressor and the heat exchange refrigeration assembly, and being used to shut off the gas passage between the compressor and the heat exchange refrigeration assembly when the gas-side shut-off valve is closed; The liquid side stop valve is arranged on the first shell, and the liquid side stop valve is connected between the compressor and the low temperature component. The liquid side stop valve is used to cut off the liquid passage between the compressor and the low temperature component when closed.

9. An air conditioning system, characterized in that: It comprises an air-conditioning outdoor unit and an air-conditioning indoor unit according to any one of claims 1 to 8, wherein the air-conditioning outdoor unit is connected to the air-conditioning indoor unit.

10. The air conditioning system according to claim 9, wherein: The air-conditioning outdoor unit comprises: a second shell, wherein the second shell is formed with an accommodating cavity; a compressor housed in the second housing, the compressor being connected to a heat exchange refrigeration component in the air conditioner indoor unit, the compressor being configured to compress the liquid refrigerant outputted by the heat exchange refrigeration component into gas for output; The condenser is housed in the second shell, the condenser is connected to the compressor, and the condenser is also connected to the low-temperature component in the air-conditioning indoor unit. The condenser is used to cool the compressed output gas into liquid refrigerant and then output it to the low-temperature component.

Images