Air treatment equipment and control method

Abstract

The invention discloses air treatment equipment and a control method. The air treatment equipment comprises a fifth matching pipeline, a fifth control pipeline with a third liquid pump, and a first heat exchange unit, a water vapor compressor, a second heat exchange unit, a liquid storage tank and a throttling component which are connected in sequence; the water vapor compressor comprises a shell internally provided with a stator and two sets of bearing assemblies, and the stator is located between the two sets of bearing assemblies; the rotor shaft penetrates through the bearing assemblies and the stator, and a second cooling cavity is defined by the shell, the rotor shaft, the stator and the two bearing assemblies; the compression unit is arranged at the end part of the rotor shaft; the first end of the fifth control pipeline is connected to a flow path formed by the liquid storage tank, the throttling component and the first heat exchange unit, the second end of the fifth control pipeline is connected to the first end of the second cooling cavity, the first end of the fifth matching pipeline is connected to the second end of the second cooling cavity, and the second end of the fifth matching pipeline is connected to the liquid storage tank. According to the scheme, a cooling device for cooling the water vapor compressor does not need to be additionally arranged, and the structure is simpler.

Description

Technical Field

[0001] This application relates to the technology of electrical equipment, especially an air treatment device and a control method thereof. Background Art

[0002] Refrigerants have gone through three generations. Before 1930, there were no specific requirements for refrigerants, and any applicable substance could be used as a refrigerant working medium, mainly natural working media such as NH3, CO2, SO2, air, etc., but there were many technical problems in their application; the second generation is chlorine-containing synthetic refrigerants, including chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs), but they can cause ozone layer depletion; the third generation is hydrofluorocarbons (HFCs). Although the problem of ozone layer depletion has been solved, it will bring a strong greenhouse effect. Under the new situation, in order to prevent global warming and reduce the greenhouse effect, people have started to accelerate the pace of replacing CFCs and HCFCs.

[0003] Among the new refrigerants, natural working medium refrigerants have received great attention. There are mainly two categories of natural working media that can be used as refrigerants. One category is specific hydrocarbons, and the most commonly used is propane (R290). However, due to safety problems such as flammability and explosiveness of such substances, their popularization and use are restricted; the other category is inorganic refrigerants, and the more concerned ones are ammonia (R717), carbon dioxide (R744) and water (R718). The biggest disadvantage of ammonia (R717) is its strong toxicity. In contrast, the physical properties of water and carbon dioxide are the best, being both economical and affordable. However, the critical temperature of carbon dioxide is 31 °C and the critical pressure is 7.38 MPa. It is in a supercritical state at a relatively high temperature, the system pressure is very high, and the safety is poor, with relatively large potential safety hazards. Water (R718) is non-toxic, non-flammable, non-explosive, widely present in nature, the most friendly to the ecological environment and human health, and when used as a refrigerant, the system operates in a vacuum state, with high safety, ODP (Ozone Depletion Potential) = 0, GWP (Global Warming Potential) = 0. However, air treatment devices using water as a refrigerant are all additionally equipped with cooling devices for cooling the water vapor compressor, and their structures are relatively complex. Summary of the Invention

[0004] This application provides an air treatment device that does not require an additional cooling device for cooling the water vapor compressor, and its structure is simpler.

[0005] This application also provides a control method for the air treatment device.

[0006] The air handling equipment provided by this application includes a fifth matching pipeline, a fifth control pipeline with a third liquid pump, and a first heat exchange unit, a steam compressor, a second heat exchange unit, a liquid storage tank, and a throttling component connected in sequence; the steam compressor includes: a housing, inside which there is a stator and multiple groups of bearing assemblies, and the stator is located between the multiple groups of bearing assemblies; a rotor shaft, passing through the bearing assemblies and the stator, and the housing, the rotor shaft, the stator, and the multiple groups of bearing assemblies enclose a second cooling chamber; and a compression unit, arranged at the end of the rotor shaft; wherein, the first end of the fifth control pipeline is connected to the flow path formed by the liquid storage tank, the throttling component, and the first heat exchange unit, the second end of the fifth control pipeline is connected to the first end of the second cooling chamber, the fifth control pipeline is arranged to form a fluid flowing into the second cooling chamber, the first end of the fifth matching pipeline is connected to the second end of the second cooling chamber, the second end of the fifth matching pipeline is connected to the liquid storage tank, and the fifth matching pipeline is arranged to form a fluid flowing from the second cooling chamber to the liquid storage tank.

[0007] In some exemplary embodiments, the liquid storage tank has a liquid inlet, a gas return port, a first liquid outlet, and a third liquid outlet. The liquid inlet is connected to the second port of the second heat exchange unit, the first liquid outlet is connected to the throttling component, the gas return port is connected to the second end of the fifth matching pipeline, and the first end of the fifth control pipeline is connected to the third liquid outlet.

[0008] In some exemplary embodiments, the compression unit includes a primary compression unit and a secondary compression unit. The multiple groups of bearing assemblies are two groups of bearing assemblies, and the two groups of bearing assemblies are located between the primary compression unit and the secondary compression unit. The first port of the primary compression unit is connected to the second port of the first heat exchange unit, the second port of the primary compression unit is connected to the first port of the secondary compression unit through an inter-stage connection pipeline, and the second port of the secondary compression unit is connected to the first port of the second heat exchange unit; the second end of the fifth control pipeline is further connected to the inter-stage connection pipeline.

[0009] In some exemplary embodiments, a second flow control component is provided in the flow path formed between the second end of the fifth control pipeline and the inter-stage connection pipeline, and a seventh control valve is provided in the flow path formed between the second end of the fifth control pipeline and the first port of the second cooling chamber.

[0010] In some exemplary embodiments, the second flow control component is a second control valve.

[0011] In some exemplary embodiments, the first heat exchange unit includes: an evaporation chamber, to which a first port of the water vapor compressor and a second end of the throttling member are both connected; a first heat exchanger disposed in the evaporation chamber; an indoor heat exchanger disposed outside the evaporation chamber; and a first liquid pump connected to the first heat exchanger and the indoor heat exchanger to form a first circulation path.

[0012] In some exemplary embodiments, the air handling device further includes: a second heat exchanger located outside the evaporation chamber and having a first heat exchange flow path and a second heat exchange flow path, and the first circulation path further includes the first heat exchange flow path; a third mating pipeline and a third control pipeline, a cooling flow path is formed between the stator and the housing, and the third mating pipeline, the third control pipeline, the cooling flow path and the second heat exchange flow path are connected to form a second circulation path, and at least one of the third mating pipeline and the third control pipeline is provided with a second liquid pump.

[0013] In some exemplary embodiments, the first heat exchange unit includes: an evaporation chamber, to which a first port of the water vapor compressor, a first end of the fifth control pipeline and a second end of the throttling member are all connected; a first heat exchanger disposed in the evaporation chamber; an indoor heat exchanger disposed outside the evaporation chamber; and a first liquid pump connected to the first heat exchanger and the indoor heat exchanger to form a first circulation path.

[0014] In some exemplary embodiments, the air handling device further includes: a second heat exchanger located outside the evaporation chamber and having a first heat exchange flow path and a second heat exchange flow path, and the first circulation path further includes the first heat exchange flow path; a third mating pipeline and a third control pipeline, a cooling flow path is formed between the stator and the housing, and the third mating pipeline, the third control pipeline, the cooling flow path and the second heat exchange flow path are connected to form a second circulation path, and at least one of the third mating pipeline and the third control pipeline is provided with a second liquid pump.

[0015] In some exemplary embodiments, the compression unit includes a primary compression unit and a secondary compression unit, and the plurality of sets of bearing assemblies are two sets of bearing assemblies. The two sets of bearing assemblies are located between the primary compression unit and the secondary compression unit. A first port of the primary compression unit is connected to a second port of the evaporation chamber, a second port of the primary compression unit is connected to a first port of the secondary compression unit through an inter-stage connection pipeline, and a second port of the secondary compression unit is connected to a first port of the second heat exchange unit.

[0016] In some exemplary embodiments, the air handling device further includes: a second control pipeline having a second flow control component, the liquid storage tank having a liquid inlet, a gas return port, a first liquid outlet, and a third liquid outlet, the liquid inlet being connected to a second port of the second heat exchange unit, the first liquid outlet being connected to a first port of the throttling component, the gas return port being connected to a second end of the fifth cooperation pipeline, a first end of the second control pipeline being connected to the third liquid outlet, and a second end of the second control pipeline being connected to the inter-stage connection pipeline.

[0017] In some exemplary embodiments, the second flow control component is a second control valve or a water pump.

[0018] In some exemplary embodiments, a seventh control valve is provided in the fifth control pipeline.

[0019] In some exemplary embodiments, the air handling device further includes: a fourth control pipeline having a fourth flow control component, a first end of the fourth control pipeline being connected between the water vapor compressor and a first port of the second heat exchange unit, and a second end of the fourth control pipeline being connected between the water vapor compressor and a second port of the first heat exchange unit.

[0020] In some exemplary embodiments, the fourth flow control component is a fourth control valve or a water pump.

[0021] In some exemplary embodiments, the air handling device further includes: an indoor fan correspondingly arranged with the indoor heat exchanger; and an outdoor fan correspondingly arranged with the second heat exchange unit.

[0022] The control method of the air handling device provided by the present application includes:

[0023] Obtain the temperature t6 of the second cooling chamber, and control the water volume supplied to the second cooling chamber from the fifth control pipeline according to the t6.

[0024] In some exemplary embodiments, the step of controlling the water volume supplied to the second cooling chamber from the fifth control pipeline according to the t6 includes:

[0025] Judge whether the eighth determination condition t6 ≤ the fourth temperature threshold T4 is established;

[0026] Based on the non-establishment of the eighth determination condition, increase the rotation speed of the third liquid pump or increase the opening degree of the seventh control valve.

[0027] In some exemplary embodiments, the control method further includes: obtaining the pressure and temperature of the water vapor in the inter-stage connection pipeline, determining the superheat degree Δt of the water vapor in the inter-stage connection pipeline according to the pressure and temperature, and determining whether the second determination condition first preset value K1 ≤ Δt ≤ second preset value K2 holds;

[0028] Based on the non - establishment of the second determination condition, increase the opening degree of the second flow control component;

[0029] Wherein, the second flow control component is a second control valve.

[0030] In some exemplary embodiments, the control method further includes: obtaining the temperature t2 of the stator, and determining whether the third determination condition t2 ≤ second temperature threshold T2 holds;

[0031] Based on the non - establishment of the third determination condition, increase the rotational speed of the second liquid pump.

[0032] In some exemplary embodiments, before the step of obtaining the temperature t6 of the second cooling chamber and controlling the water volume supplied from the fifth control pipeline to the second cooling chamber according to the t6, the control method further includes:

[0033] Controlling the first liquid pump to operate at a first set speed and controlling the second liquid pump to operate at a second set speed;

[0034] Opening the fourth control valve;

[0035] Starting the water vapor compressor and controlling the water vapor compressor to run to a set rotational speed;

[0036] Gradually closing the fourth control valve according to a set instruction, then obtaining the pressure P inside the second heat exchange unit, and determining whether the fourth determination condition P > preset pressure P1 holds;

[0037] Based on the non - establishment of the fourth determination condition, increase the rotational speed of the water vapor compressor;

[0038] Based on the establishment of the fourth determination condition, controlling the throttling component to open to a set opening degree, controlling the third liquid pump to operate at a third set speed, and controlling the water vapor compressor to operate at the current rotational speed.

[0039] In some exemplary embodiments, before the step of controlling the first liquid pump to operate at a first set speed and controlling the second liquid pump to operate at a second set speed, the control method further includes:

[0040] Obtain the initial pressure and initial water level in the evaporation chamber, and control the vacuum pumping device and water injection device connected to the evaporation chamber according to the pressure and water level to adjust the initial pressure in the evaporation chamber to a set pressure and the initial water level in the evaporation chamber to a set water level.

[0041] In some exemplary embodiments, after the step of obtaining the temperature t6 of the second cooling chamber and controlling the amount of water supplied into the second cooling chamber from the fifth control pipeline according to the t6, the control method further includes:

[0042] Obtain the indoor temperature t3 and the preset refrigeration temperature t4, and determine whether the fifth determination condition |t3 - t4| ≤ the third temperature threshold T3 holds;

[0043] Based on the fifth determination condition being satisfied, obtain the pressure fluctuation amplitude at the second port of the secondary compression unit, and determine whether the sixth determination condition that the steam compressor surges holds according to the pressure fluctuation amplitude;

[0044] Based on the sixth determination condition being satisfied, perform the step of opening the fourth control valve;

[0045] Based on the sixth determination condition not being satisfied, maintain the current operating state.

[0046] In some exemplary embodiments, based on the fifth determination condition not being satisfied, obtain the indoor air outlet temperature t5, and determine whether the seventh determination condition t5 ≤ t4 holds;

[0047] Based on the seventh determination condition being satisfied, reduce the rotational speed of the first liquid pump and / or the rotational speed of the indoor fan, and then perform the step of obtaining the temperature t6 of the second cooling chamber and controlling the amount of water supplied into the second cooling chamber from the fifth control pipeline according to the t6;

[0048] Based on the seventh determination condition not being satisfied, increase the rotational speed of the first liquid pump and / or the rotational speed of the indoor fan, and then perform the step of obtaining the indoor temperature t3 and the preset refrigeration temperature t4, and determining whether the fifth determination condition |t3 - t4| ≤ the third temperature threshold T3 holds.

[0049] Compared with the related art, for the air treatment equipment provided in this application, when the water vapor compressor operates, after the water vapor is compressed by the compression unit from the first heat exchange unit, it enters the second heat exchange unit to release heat, so that the temperature of the water vapor decreases and condensed water is formed. The condensed water is stored in the liquid storage tank, and then after passing through the throttling component to reduce the pressure, it enters the first heat exchange unit to absorb heat, so that the temperature of the condensed water increases and water vapor is formed, and so on in a cycle. During this process, a part of the fluid in the flow path formed by the liquid storage tank, the throttling component and the first heat exchange unit will flow from the fifth control pipeline, through the second cooling chamber and the fifth matching pipeline in sequence to the liquid storage tank. This part of the fluid absorbs the heat of the stator, the rotor shaft, the bearing assembly and the housing during the process of passing through the second cooling chamber, realizing the cooling of the stator, the rotor shaft, the bearing assembly and the housing. This solution does not require an additional cooling device for cooling the water vapor compressor, and the structure of the air treatment equipment is simpler.

[0050] Other features and advantages of this application will be described in the following specification, and, in part, will be obvious from the specification, or will be understood by implementing this application. Other advantages of this application can be realized and obtained through the solutions described in the specification and the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] The drawings are used to provide an understanding of the technical solutions of this application, and constitute a part of the specification. Together with the embodiments of this application, they are used to explain the technical solutions of this application, and do not constitute a limitation to the technical solutions of this application.

[0052] Figure 1 Schematic structural diagram of the air treatment equipment provided for some embodiments of this application;

[0053] Figure 2 For Figure 1 Schematic structural diagram of the water vapor compressor in

[0054] Figure 3 Schematic structural diagram of the air treatment equipment provided for other embodiments of this application;

[0055] Figure 4 Schematic structural diagram of the air treatment equipment provided for still other embodiments of this application;

[0056] Figure 5 Flow chart of the control method provided for some embodiments of this application;

[0057] Figure 6 Flow chart of the control method provided for other embodiments of this application.

[0058] Among them, Figures 1 to 4 The corresponding relationship between the reference numerals and the component names in the drawings is:

[0059] 40 Second control pipeline, 41 Second control valve, 50 Fourth control pipeline, 51 Fourth control valve, 60 Third mating pipeline, 70 Third control pipeline, 71 Second liquid pump, 80 Fifth mating pipeline, 90 Fifth control pipeline, 91 Third liquid pump, 92 Seventh control valve, 100 First heat exchange unit, 110 Evaporation chamber, 120 First heat exchanger, 130 Indoor heat exchanger, 140 First liquid pump, 150 Second heat exchanger, 200 Steam compressor, 210 Housing, 220 Bearing sleeve, 230 Stator, 240 Bearing, 250 First-stage compression unit, 260 Second-stage compression unit, 270 Rotor shaft, 280 Second cooling chamber, 290 Inter-stage connection pipeline, 291 Cooling flow path, 300 Second heat exchange unit, 400 Throttling component, 500 Liquid storage tank, 600 Vacuum pumping device, 700 Water injection device, 800 Nozzle. Detailed implementation manners

[0060] This application describes multiple embodiments, but the description is exemplary rather than restrictive, and it will be obvious to those of ordinary skill in the art that there can be more embodiments and implementation solutions within the scope of the embodiments described in this application. Although many possible combinations of features are shown in the drawings and discussed in the detailed implementation manners, many other combination ways of the disclosed features are also possible. Unless specifically restricted, any feature or element of any embodiment can be combined with any other feature or element in any other embodiment, or can replace any other feature or element in any other embodiment.

[0061] This application includes and contemplates combinations with features and elements known to those of ordinary skill in the art. The embodiments, features, and elements already disclosed in this application can also be combined with any conventional features or elements to form a unique inventive solution defined by the claims. Any feature or element of any embodiment can also be combined with features or elements from other inventive solutions to form another unique inventive solution defined by the claims. Therefore, it should be understood that any feature shown and / or discussed in this application can be implemented alone or in any suitable combination. Therefore, except for the limitations made according to the appended claims and their equivalent replacements, the embodiments are not subject to other limitations. In addition, various modifications and changes can be made within the scope of protection of the appended claims.

[0062] In addition, when describing representative embodiments, the specification may have presented the method and / or process as a particular sequence of steps. However, to the extent that the method or process does not depend on the particular order of the steps described herein, the method or process should not be limited to the particular order of steps described. As will be understood by those of ordinary skill in the art, other step sequences are possible. Accordingly, the particular order of steps set forth in the specification should not be construed as a limitation on the claims. In addition, the claims directed to the method and / or process should not be limited to performing their steps in the order written, as those skilled in the art can readily appreciate that such order can be varied and still remain within the spirit and scope of the embodiments of the present application.

[0063] The air handling device provided by the present application, as Figures 1 to 4 shown, includes a fifth mating pipeline 80, a fifth control pipeline 90 having a third liquid pump 91, and a first heat exchange unit 100, a steam compressor 200, a second heat exchange unit 300, a liquid storage tank 500, and a throttling member 400 that are connected in sequence; the steam compressor 200 includes: a housing 210, inside which a stator 230 and multiple groups of bearing assemblies are provided, and the stator 230 is located between the multiple groups of bearing assemblies; a rotor shaft 270, passing through the bearing assemblies and the stator 230, and the housing 210, the rotor shaft 270, the stator 230, and two groups of bearing assemblies on both sides of the stator 230 enclose a second cooling chamber 280; and a compression unit, provided at an end of the rotor shaft 270; wherein, a first end of the fifth control pipeline 90 is connected to a flow path formed by the liquid storage tank 500, the throttling member 400, and the first heat exchange unit 100, a second end of the fifth control pipeline 90 is connected to a first end of the second cooling chamber 280, the fifth control pipeline 90 is arranged to form a fluid flowing into the second cooling chamber 280, a first end of the fifth mating pipeline 80 is connected to a second end of the second cooling chamber 280, a second end of the fifth mating pipeline 80 is connected to the liquid storage tank 500, and the fifth mating pipeline 80 is arranged to form a fluid flowing from the second cooling chamber 280 to the liquid storage tank 500. Figure 1 and Figure 3 The reference numeral 800 in the figure is a nozzle.

[0064] The air treatment device operates a water vapor compressor 200. After the water vapor is compressed by the compression unit from the first heat exchange unit 100, it enters the second heat exchange unit 300 for heat release, causing the temperature of the water vapor to decrease and form condensed water (medium-temperature condensed water). The condensed water is stored in the liquid storage tank 500, and then after being depressurized by the throttling component 400, it enters the first heat exchange unit 100 for heat absorption, causing the temperature of the condensed water to increase and form water vapor, and so on in a cycle. During this process, a part of the fluid in the flow path formed by the liquid storage tank 500, the throttling component 400, and the first heat exchange unit 100 will flow from the fifth control pipeline 90, sequentially through the second cooling chamber 280 and the fifth matching pipeline 80 to the liquid storage tank 500. This part of the fluid absorbs the heat of the stator 230, the rotor shaft 270, the bearing assembly, and the housing 210 during the process of passing through the second cooling chamber 280, realizing the cooling of the stator 230, the rotor shaft 270, the bearing assembly, and the housing 210. This solution does not require an additional cooling device for cooling the water vapor compressor 200, and the structure of the air treatment device is simpler.

[0065] Among them, multiple groups of bearing assemblies are set as two groups of bearing assemblies (or three groups of bearing assemblies or four groups of bearing assemblies, etc.). Each bearing assembly includes a bearing sleeve 220 and a bearing 240, and the bearing 240 is located between the bearing sleeve 220 and the rotor shaft 270.

[0066] In some exemplary embodiments, as Figure 1 shown, the liquid storage tank 500 has a liquid inlet, a gas return port, a first liquid outlet, and a third liquid outlet. The liquid inlet is connected to the second port of the second heat exchange unit 300, the first liquid outlet is connected to the throttling component 400, the gas return port is connected to the second end of the fifth matching pipeline 80, and the first end of the fifth control pipeline 90 is connected to the third liquid outlet. Among them, the liquid inlet is located at the upper part of the liquid storage tank 500, and the gas return port, the first liquid outlet, and the third liquid outlet are located at the lower part of the liquid storage tank 500.

[0067] The medium-temperature and high-pressure condensed water in the outdoor heat exchanger enters the liquid storage tank 500 from the liquid inlet, and then a part of the medium-temperature and high-pressure condensed water flows from the first liquid outlet through the throttling component 400 to the first heat exchange unit 100; another part of the medium-temperature and high-pressure condensed water enters the second cooling chamber 280 from the third liquid outlet through the fifth control pipeline 90, flashes in the second cooling chamber 280, absorbs the heat of the stator 230, the rotor shaft 270, the bearing assembly, and the housing 210, realizes the cooling of the stator 230, the rotor shaft 270, the bearing assembly, and the housing 210, and the formed water vapor then flows back to the liquid storage tank 500 from the fifth matching pipeline 80.

[0068] In some examples, as Figure 1 and Figure 2As shown, the compression unit includes a primary compression unit 250 and a secondary compression unit 260. Two bearing assemblies are located between the primary compression unit 250 and the secondary compression unit 260. The first port of the primary compression unit 250 is connected to the second port of the first heat exchange unit 100. The second port of the primary compression unit 250 is connected to the first port of the secondary compression unit 260 through an inter-stage connection pipeline 290. The second port of the secondary compression unit 260 is connected to the first port of the second heat exchange unit 300. The second end of the fifth control pipeline 90 is also connected to the inter-stage connection pipeline 290.

[0069] The high-pressure medium-temperature condensed water in the fifth control pipeline 90 is split at the outlet of the fifth control pipeline 90. A part of the high-pressure medium-temperature condensed water enters the second cooling chamber 280 and flashes inside the second cooling chamber 280, absorbing the heat of the stator 230, the rotor shaft 270, the bearing assemblies, and the housing 210, thereby achieving the cooling of the stator 230, the rotor shaft 270, the bearing assemblies, and the housing 210. The formed water vapor then flows back to the liquid storage tank 500 through the fifth matching pipeline 80. Another part of the high-pressure medium-temperature condensed water enters the inter-stage connection pipeline 290 for flashing to perform inter-stage cooling between the primary compression unit 250 and the secondary compression unit 260, so that the superheat degree of the water vapor in the inter-stage connection pipeline 290 is maintained at 1°C to 2°C. This can prevent the temperature of the water vapor compressed by the secondary compression unit 260 from being too high, which is beneficial to improving the performance of the water vapor compressor 200. This solution does not require an additional cooling device for cooling the water vapor compressor 200, and the structure of the air treatment equipment is simpler.

[0070] In some examples, as Figure 1 shown, a second control valve 41 is provided in the flow path formed between the second end of the fifth control pipeline 90 and the inter-stage connection pipeline 290. The second control valve 41 is used to control the amount of water supplied into the inter-stage connection pipeline 290. A seventh control valve 92 is provided in the flow path formed between the second end of the fifth control pipeline 90 and the first port of the second cooling chamber 280. The seventh control valve 92 is used to control the amount of water supplied into the second cooling chamber 280.

[0071] In some examples, as Figure 1As shown in the figure, the first heat exchange unit 100 includes: an evaporation chamber 110, to which the first port of the water vapor compressor 200 and the second end of the throttling component 400 are both connected; a first heat exchanger 120 disposed within the evaporation chamber 110; an indoor heat exchanger 130 disposed outside the evaporation chamber 110; and a first liquid pump 140 connected to the first heat exchanger 120 and the indoor heat exchanger 130 to form a first circulation path (alternatively, the first heat exchange unit 100 may include the first liquid pump 140, the evaporation chamber 110, and the indoor heat exchanger 130, and the first liquid pump 140, the evaporation chamber 110, and the indoor heat exchanger 130 are connected to form a first circulation path, which can also achieve the purpose of this application. Its gist does not depart from the design concept of the present invention, so it will not be elaborated here and should also fall within the protection scope of this application).

[0072] The low-temperature and low-pressure condensed water after throttling by the throttling component 400 enters the evaporation chamber 110, exchanges heat with the first heat exchanger 120, the first liquid pump 140 operates, the fluid in the first circulation path circulates, and the indoor heat exchanger 130 exchanges heat with the indoor air to achieve cooling of the room.

[0073] In some examples, such as Figure 1 and Figure 2 As shown in the figure, the air handling device further includes: a second heat exchanger 150 located outside the evaporation chamber 110 and having a first heat exchange flow path and a second heat exchange flow path, and the first circulation path further includes the first heat exchange flow path; a third cooperation pipeline 60 and a third control pipeline 70. A cooling flow path 291 is formed between the stator 230 and the housing 210. The third cooperation pipeline 60, the third control pipeline 70, the cooling flow path 291, and the second heat exchange flow path are connected to form a second circulation path, and at least one of the third cooperation pipeline 60 and the third control pipeline 70 is provided with a second liquid pump 71.

[0074] The first heat exchange flow path and the second heat exchange flow path exchange heat, the second liquid pump 71 operates, the fluid in the second circulation path circulates, absorbs the heat of the stator 230 and the housing 210, and achieves cooling of the stator 230 and the housing 210.

[0075] It can be that the third cooperation pipeline 60 is provided with a second liquid pump; or it can be that, as Figure 1 shown in the figure, the third control pipeline 70 is provided with a second liquid pump 71, etc.; the above can all achieve the purpose of this application. Its gist does not depart from the design concept of the present invention, so it will not be elaborated here and should all fall within the protection scope of this application.

[0076] In some other exemplary embodiments, such as Figure 3As shown in the figure, the first heat exchange unit 100 includes: an evaporation chamber 110, to which the first port of the steam compressor 200, the first end of the fifth control pipeline 90, and the second end of the throttling component 400 are all connected; a first heat exchanger 120 disposed within the evaporation chamber 110; an indoor heat exchanger 130 disposed outside the evaporation chamber 110; and a first liquid pump 140 connected to the first heat exchanger 120 and the indoor heat exchanger 130 to form a first circulation path (alternatively, the first heat exchange unit 100 may include the first liquid pump 140, the evaporation chamber 110, and the indoor heat exchanger 130, and the first liquid pump 140, the evaporation chamber 110, and the indoor heat exchanger 130 are connected to form a first circulation path, which can also achieve the purpose of the present application. Its gist does not depart from the design concept of the present invention, so it will not be elaborated here and should also fall within the protection scope of the present application). Among them, the first port of the steam compressor 200 is connected to the second port at the top of the evaporation chamber 110, the second end of the throttling component 400 is connected to the first port at the bottom of the evaporation chamber 110, and the first end of the fifth control pipeline 90 is connected to the bottom of the evaporation chamber 110.

[0077] The low-temperature and low-pressure condensate after throttling by the throttling component 400 enters the evaporation chamber 110, exchanges heat with the first heat exchanger 120. The first liquid pump 140 operates, and the fluid in the first circulation path circulates. The indoor heat exchanger 130 exchanges heat with the indoor air to achieve cooling of the room. The condensate at the bottom of the evaporation chamber 110 enters the second cooling chamber 280 through the fifth control pipeline 90, flashes in the second cooling chamber 280, absorbs the heat of the stator 230, the rotor shaft 270, the bearing assembly, and the housing 210, realizes cooling of the stator 230, the rotor shaft 270, the bearing assembly, and the housing 210, and the formed water vapor then flows from the fifth matching pipeline 80 to the liquid storage tank 500.

[0078] In some examples, as Figure 3 shown, the air handling device further includes: a second heat exchanger 150 located outside the evaporation chamber 110 and having a first heat exchange flow path and a second heat exchange flow path. The first circulation path further includes the first heat exchange flow path; a third matching pipeline 60 and a third control pipeline 70. A cooling flow path 291 is formed between the stator 230 and the housing 210. The third matching pipeline 60, the third control pipeline 70, the cooling flow path 291, and the second heat exchange flow path are connected to form a second circulation path, and at least one of the third matching pipeline 60 and the third control pipeline 70 is provided with a second liquid pump 71.

[0079] The first heat exchange flow path and the second heat exchange flow path exchange heat. The second liquid pump 71 operates, and the fluid in the second circulation path circulates to absorb the heat of the stator 230 and the housing 210, realizing cooling of the stator 230 and the housing 210.

[0080] It may be that the third matching pipeline 60 is provided with a second liquid pump; or it may be, as Figure 3 shown, the third control pipeline 70 is provided with a second liquid pump 71 or the like; the above can all achieve the purpose of the present application, and its gist does not deviate from the design concept of the present invention, so it will not be elaborated here and all should fall within the protection scope of the present application.

[0081] In some examples, as Figure 2 and Figure 3 shown, the compression unit includes a primary compression unit 250 and a secondary compression unit 260. Two bearing assemblies are located between the primary compression unit 250 and the secondary compression unit 260. The first port of the primary compression unit 250 is connected to the second port of the evaporation chamber 110. The second port of the primary compression unit 250 is connected to the first port of the secondary compression unit 260 through an inter-stage connection pipeline 290. The second port of the secondary compression unit 260 is connected to the first port of the second heat exchange unit 300; as Figure 3 shown, the air handling device further includes: a second control pipeline 40 having a second control valve 41. The liquid storage tank 500 has a liquid inlet, a gas return port, a first liquid outlet, and a third liquid outlet. The liquid inlet is connected to the second port of the second heat exchange unit 300. The first liquid outlet is connected to the first port of the throttling member 400. The gas return port is connected to the second end of the fifth matching pipeline 80. The first end of the second control pipeline 40 is connected to the third liquid outlet. The second end of the second control pipeline 40 is connected to the inter-stage connection pipeline 290. Among them, the liquid inlet is located at the upper part of the liquid storage tank 500, and the gas return port, the first liquid outlet, and the third liquid outlet are located at the lower part of the liquid storage tank 500.

[0082] The medium-temperature and high-pressure condensate water in the outdoor heat exchanger enters the liquid storage tank 500 from the liquid inlet, and then a part of the medium-temperature and high-pressure condensate water flows from the first liquid outlet through the throttling member 400 to the first heat exchange unit 100; another part of the medium-temperature and high-pressure condensate water enters the inter-stage connection pipeline 290 from the third liquid outlet through the second control pipeline 40 for flashing, and performs inter-stage cooling between the primary compression unit 250 and the secondary compression unit 260, so that the superheat degree of the water vapor in the inter-stage connection pipeline 290 is maintained at 1°C to 2°C. This can prevent the temperature of the water vapor compressed by the secondary compression unit 260 from being too high, which is beneficial to improving the performance of the water vapor compressor 200. This solution does not require an additional cooling device for cooling the water vapor compressor 200, and the structure of the air handling device is simpler.

[0083] It may be that, as Figure 3 shown, the amount of water supplied into the second cooling chamber 280 is controlled by a third liquid pump 91; or it may be, as Figure 4As shown, the fifth control pipeline 90 is further provided with a seventh control valve 92, and the amount of water supplied into the second cooling chamber 280 is controlled by the seventh control valve 92; all of the above can achieve the purpose of the present application, and its gist does not deviate from the design concept of the present invention, so it will not be elaborated here and should all fall within the protection scope of the present application.

[0084] In some exemplary embodiments, such as Figure 1 、 Figure 3 and Figure 4 As shown, the air handling device further includes: a fourth control pipeline 50 having a fourth control valve 51, a first end of the fourth control pipeline 50 is connected between a second port of the secondary compression unit 260 and a first port of the second heat exchange unit 300, and a second end of the fourth control pipeline 50 is connected between a first port of the primary compression unit 250 and a second port of the first heat exchange unit 100.

[0085] When the pressure builds up in the steam compressor 200, by opening the fourth control valve 51, the steam compressor 200 can be prevented from surging.

[0086] In some exemplary embodiments, the second heat exchange unit 300 is an outdoor heat exchanger. The air handling device further includes: an indoor fan, which is correspondingly arranged with the indoor heat exchanger 130; and an outdoor fan, which is correspondingly arranged with the second heat exchange unit 300. Additionally, as Figure 1 、 Figure 3 and Figure 4 As shown, the evaporation chamber 110 is connected with a vacuum pumping device 600 and a water injection device 700. The water injection device 700 includes a fifth control valve, and the vacuum pumping device 600 includes a vacuum pump.

[0087] In the present application, the first ports are all inlets, the second ports are all outlets, the primary compression unit 250 and the secondary compression unit 260 are symmetrically arranged, and the housing 210 is made by 3D metal printing technology. Figure 2 The labels a and c in

[0088] The control method of the air handling device provided by the present application, as Figure 5 and Figure 6 shown, includes:

[0089] Obtain the temperature t6 of the second cooling chamber 280, and control the amount of water supplied into the second cooling chamber 280 from the fifth control pipeline 90 according to t6, so as to better achieve the cooling of the stator 230, the rotor shaft 270, the bearing assembly and the housing 210.

[0090] In some examples, such as Figure 3 and Figure 6 shown, the step of controlling the amount of water supplied into the second cooling chamber 280 from the fifth control pipeline 90 according to t6 includes:

[0091] Determine whether the eighth determination condition t6 ≤ the fourth temperature threshold T4 holds;

[0092] Based on the non - establishment of the eighth determination condition, increase the rotational speed of the third liquid pump 91.

[0093] When the rotational speed of the third liquid pump 91 increases, the amount of condensed water supplied to the second cooling chamber 280 for flashing increases, which can improve the cooling effect of the stator 230, the rotor shaft 270, the bearing assembly, and the housing 210.

[0094] In some other examples, such as Figure 1 and Figure 5 shown (or as Figure 4 and Figure 5 shown), the steps of controlling the amount of water supplied from the fifth control pipeline 90 to the second cooling chamber 280 according to t6 include:

[0095] Determine whether the eighth determination condition t6 ≤ the fourth temperature threshold T4 holds;

[0096] Based on the non - establishment of the eighth determination condition, increase the opening degree of the seventh control valve 92.

[0097] When the opening degree of the seventh control valve 92 increases, the amount of condensed water supplied to the second cooling chamber 280 for flashing increases, which can improve the cooling effect of the stator 230, the rotor shaft 270, the bearing assembly, and the housing 210.

[0098] In some examples, such as Figure 1 , Figures 3 to 6 shown, the control method further includes: obtaining the pressure and temperature of the water vapor in the inter - stage connection pipeline 290, determining the superheat degree △t of the water vapor in the inter - stage connection pipeline 290 according to the pressure and temperature, and determining whether the second determination condition the first preset value K1 ≤ △t ≤ the second preset value K2 holds;

[0099] Based on the non - establishment of the second determination condition, increase the opening degree of the second control valve 41.

[0100] When the opening degree of the second control valve 41 increases, the amount of condensed water entering the second cooling chamber 280 through the second control valve 41 for flashing increases, which can improve the cooling effect of the inter - stage connection pipeline 290. K1 is greater than 0 °C. For example, if K1 is set to 1 °C and K2 is set to 2 °C, the temperature of the water vapor after being compressed by the two - stage compression unit 260 is not very high, which can better ensure the performance of the water vapor compressor 200.

[0101] In some examples, such as Figure 1 and Figure 5 shown (or as Figure 4 and Figure 5As shown, the control method further includes: obtaining the temperature t2 of the stator 230, and determining whether the third determination condition t2 ≤ the second temperature threshold T2 holds;

[0102] Based on the non - establishment of the third determination condition, increase the rotational speed of the second liquid pump 71.

[0103] Increasing the rotational speed of the second liquid pump 71 can improve the cooling effect of the stator 230 and the housing 210.

[0104] In some examples, as Figure 1 、 Figures 3 to 6 shown, before the step of obtaining the temperature t6 of the second cooling chamber 280 and controlling the water volume supplied to the second cooling chamber 280 from the fifth control pipeline 90 according to t6, the control method further includes:

[0105] Controlling the first liquid pump 140 to operate at a first set speed, and controlling the second liquid pump 71 to operate at a second set speed;

[0106] Opening the fourth control valve 51;

[0107] Starting the steam compressor 200, and controlling the steam compressor 200 to operate at a set rotational speed;

[0108] Gradually closing the fourth control valve 51 according to a set command, then obtaining the pressure P inside the second heat exchange unit 300, and determining whether the fourth determination condition P > the preset pressure P1 holds;

[0109] Based on the non - establishment of the fourth determination condition, increase the rotational speed of the steam compressor 200;

[0110] Based on the establishment of the fourth determination condition, control the throttling component 400 to open to a set opening degree, control the third liquid pump 91 to operate at a third set speed, control the second control valve 41 to open to a second set opening degree, control the seventh control valve 92 to open to a seventh set opening degree, and control the steam compressor 200 to operate at the current rotational speed.

[0111] As Figure 1 and Figure 5 shown, under normal circumstances, the third liquid pump 91 operates at a third set speed: when the seventh control valve 92 is opened to the seventh set opening degree, t6 ≤ T4 is satisfied; when the second control valve 41 is opened to the second set opening degree, K1 ≤ △t ≤ K2 is satisfied. At this time, the operating performance of the air - handling equipment is better.

[0112] As Figure 4 and Figure 5As shown, under normal conditions: when the third liquid pump 91 operates at the third set speed and the seventh control valve 92 is opened to the seventh set opening degree, t6 ≤ T4 is satisfied; when the second control valve 41 is opened to the second set opening degree, K1 ≤ Δt ≤ K2 is satisfied. At this time, the operating performance of the air handling equipment is better.

[0113] In some other examples, such as Figure 3 and Figure 6 As shown, before the step of obtaining the temperature t6 of the second cooling chamber 280 and controlling the water volume supplied to the second cooling chamber 280 from the fifth control pipeline 90 according to t6, the control method further includes:

[0114] Controlling the first liquid pump 140 to operate at the first set speed and controlling the second liquid pump 71 to operate at the second set speed;

[0115] Opening the fourth control valve 51;

[0116] Starting the steam compressor 200 and controlling the steam compressor 200 to operate at the set speed;

[0117] Gradually closing the fourth control valve 51 according to the set command, then obtaining the pressure P inside the second heat exchange unit 300, and judging whether the fourth judgment condition P > the preset pressure P1 is established;

[0118] Based on the non - establishment of the fourth judgment condition, increasing the speed of the steam compressor 200;

[0119] Based on the establishment of the fourth judgment condition, controlling the throttling component 400 to be opened to the set opening degree, controlling the third liquid pump 91 to operate at the third set speed, controlling the second control valve 41 to be opened to the second set opening degree, and controlling the steam compressor 200 to operate at the current speed.

[0120] Such as Figure 3 and Figure 6 As shown, under normal conditions: when the third liquid pump 91 operates at the third set speed, t6 ≤ T4 is satisfied; when the second control valve 41 is opened to the second set opening degree, K1 ≤ Δt ≤ K2 is satisfied. At this time, the operating performance of the air handling equipment is better.

[0121] In some examples, such as Figure 1 、 Figures 3 to 6 As shown, before the step of controlling the first liquid pump 140 to operate at the first set speed and controlling the second liquid pump 71 to operate at the second set speed, the control method further includes:

[0122] Obtain the initial pressure and initial water level in the evaporation chamber 110, and control the vacuum pumping device 600 and the water injection device 700 connected to the evaporation chamber 110 according to the pressure and water level to adjust the initial pressure in the evaporation chamber 110 to the set pressure and the initial water level in the evaporation chamber 110 to the set water level.

[0123] That is: obtain the initial pressure in the evaporation chamber 110, determine whether the initial pressure in the evaporation chamber 110 is lower than the set pressure. Based on the initial pressure in the evaporation chamber 110 being lower than the set pressure, turn on the vacuum pumping device 600 to pump vacuum, and turn off the vacuum pumping device 600 when the initial pressure in the evaporation chamber 110 reaches the set pressure; obtain the initial water level in the evaporation chamber 110, determine whether the initial water level in the evaporation chamber 110 is lower than the set water level. Based on the initial water level in the evaporation chamber 110 being lower than the set water level, turn on the fifth control valve, and turn off the fifth control valve when the initial water level in the evaporation chamber 110 reaches the set water level.

[0124] In some examples, such as Figure 1 、 Figures 3 to 6 shown, after the step of obtaining the temperature t6 of the second cooling chamber 280 and controlling the amount of water supplied from the fifth control pipeline 90 to the second cooling chamber 280 according to t6, the control method further includes:

[0125] Obtain the indoor temperature t3 and the preset refrigeration temperature t4, and determine whether the fifth determination condition |t3 - t4| ≤ the third temperature threshold T3 is established;

[0126] Based on the fifth determination condition being established, obtain the pressure fluctuation amplitude at the second port of the secondary compression unit 260, and determine whether the sixth determination condition that the steam compressor 200 surges is established according to the pressure fluctuation amplitude;

[0127] Based on the sixth determination condition being established, execute the step of turning on the fourth control valve 51;

[0128] Based on the sixth determination condition not being established, maintain the current operating state.

[0129] In some examples, such as Figure 1 、 Figures 3 to 6 shown, based on the fifth determination condition not being established, obtain the indoor outlet air temperature t5, and determine whether the seventh determination condition t5 ≤ t4 is established;

[0130] Based on the seventh determination condition being established, reduce the rotational speed of the first liquid pump 140 and / or the rotational speed of the indoor fan (to adjust the indoor temperature t3 to the preset refrigeration temperature t4), and then execute the step of obtaining the temperature t6 of the second cooling chamber 280 and controlling the amount of water supplied from the fifth control pipeline 90 to the second cooling chamber 280 according to t6;

[0131] Based on the non - establishment of the seventh determination condition, increase the rotational speed of the first liquid pump 140 and / or the rotational speed of the indoor blower (to adjust the indoor temperature t3 towards the preset refrigeration temperature t4), and then execute the steps of obtaining the indoor temperature t3 and the preset refrigeration temperature t4, and determining whether the fifth determination condition |t3 - t4| ≤ the third temperature threshold T3 is established.

[0132] In one embodiment, as Figure 1 and Figure 5 shown (or as Figure 4 and Figure 5 shown), a control method for an air - handling device includes:

[0133] Obtain the initial pressure and the initial water level in the evaporation chamber 110;

[0134] Based on the initial water level in the evaporation chamber 110 being lower than the set water level, open the fifth control valve, and close the fifth control valve when the initial water level in the evaporation chamber 110 reaches the set water level;

[0135] Based on the initial pressure in the evaporation chamber 110 being lower than the set pressure, turn on the vacuum pumping device 600 to pump vacuum, and turn off the vacuum pumping device 600 when the initial pressure in the evaporation chamber 110 reaches the set pressure;

[0136] Control the first liquid pump 140 to operate at a first set speed and control the second liquid pump 71 to operate at a second set speed;

[0137] Open the fourth control valve 51;

[0138] Turn on the water vapor compressor 200 and control the water vapor compressor 200 to run to the set rotational speed;

[0139] Gradually close (such as slowly closing) the fourth control valve 51 according to the set instruction;

[0140] Obtain the pressure P inside the second heat - exchange unit 300 and determine whether the fourth determination condition P > P1 is established;

[0141] Based on the non - establishment of the fourth determination condition, increase the rotational speed of the water vapor compressor 200;

[0142] Based on the establishment of the fourth determination condition, control the throttling component 400 to open to the set opening degree, control the third liquid pump 91 to operate at a third set speed, control the second control valve 41 to open to the second set opening degree, control the seventh control valve 92 to open to the seventh set opening degree, and control the water vapor compressor 200 to run at the current rotational speed;

[0143] Obtain the pressure and temperature of the water vapor in the inter-stage connecting pipeline 290, determine the superheat degree △t of the water vapor in the inter-stage connecting pipeline 290 according to the pressure and temperature, and judge whether the first preset value K1 ≤ △t ≤ the second preset value K2 of the second determination condition is established;

[0144] Based on the fact that the second determination condition is not established, increase the opening degree of the second control valve 41, and then execute the steps of obtaining the pressure and temperature of the water vapor in the inter-stage connecting pipeline 290, determining the superheat degree △t of the water vapor in the inter-stage connecting pipeline 290 according to the pressure and temperature, and judging whether the first preset value K1 ≤ △t ≤ the second preset value K2 of the second determination condition is established;

[0145] Based on the fact that the second determination condition is established, obtain the temperature t6 of the second cooling chamber 280, and judge whether the eighth determination condition t6 ≤ the fourth temperature threshold T4 is established;

[0146] Based on the fact that the eighth determination condition is not established, increase the opening degree of the seventh control valve 92, and then execute the steps of obtaining the temperature t6 of the second cooling chamber 280 and judging whether the eighth determination condition t6 ≤ the fourth temperature threshold T4 is established;

[0147] Based on the fact that the eighth determination condition is established, obtain the indoor temperature t3 and the preset refrigeration temperature t4, and judge whether the fifth determination condition |t3 - t4| ≤ the third temperature threshold T3 is established;

[0148] Based on the fact that the fifth determination condition is established, obtain the pressure fluctuation amplitude of the second port of the secondary compression unit 260, and judge whether the sixth determination condition that the water vapor compressor 200 surges (that is, the pressure fluctuation amplitude > the preset pressure fluctuation amplitude) is established according to the pressure fluctuation amplitude;

[0149] Based on the fact that the sixth determination condition is established, execute the step of opening the fourth control valve 51 (to improve the pressure buildup in the water vapor compressor 200 and avoid the continuous surge of the water vapor compressor 200);

[0150] Based on the fact that the sixth determination condition is not established, execute the steps of obtaining the pressure and temperature of the water vapor in the inter-stage connecting pipeline 290, determining the superheat degree △t of the water vapor in the inter-stage connecting pipeline 290 according to the pressure and temperature, and judging whether the first preset value K1 ≤ △t ≤ the second preset value K2 of the second determination condition is established;

[0151] Based on the fact that the fifth determination condition is not established, obtain the indoor outlet air temperature t5, and judge whether the seventh determination condition t5 ≤ t4 is established;

[0152] Based on the establishment of the seventh determination condition, reduce the rotational speed of the first liquid pump 140 and / or the rotational speed of the indoor blower (to quickly adjust the indoor temperature t3 to the preset refrigeration temperature t4), and then execute the steps of obtaining the pressure and temperature of the water vapor in the inter-stage connection pipeline 290, determining the superheat degree Δt of the water vapor in the inter-stage connection pipeline 290 according to the pressure and temperature, and judging whether the first preset value K1 ≤ Δt ≤ the second preset value K2 of the second determination condition is established;

[0153] Based on the non - establishment of the seventh determination condition, increase the rotational speed of the first liquid pump 140 and / or the rotational speed of the indoor blower (to quickly adjust the indoor temperature t3 to the preset refrigeration temperature t4), and then execute the steps of obtaining the indoor temperature t3 and the preset refrigeration temperature t4, and judging whether the fifth determination condition |t3 - t4| ≤ the third temperature threshold T3 is established.

[0154] In another embodiment, as Figure 3 and Figure 6 shown, a control method for an air handling device includes:

[0155] Obtain the initial pressure and initial water level in the evaporation chamber 110;

[0156] Based on the initial water level in the evaporation chamber 110 being lower than the set water level, open the fifth control valve, and close the fifth control valve when the initial water level in the evaporation chamber 110 reaches the set water level;

[0157] Based on the initial pressure in the evaporation chamber 110 being lower than the set pressure, turn on the vacuum pumping device 600 to pump vacuum, and turn off the vacuum pumping device 600 when the initial pressure in the evaporation chamber 110 reaches the set pressure;

[0158] Control the first liquid pump 140 to operate at the first set speed and control the second liquid pump 71 to operate at the second set speed;

[0159] Open the fourth control valve 51;

[0160] Turn on the water vapor compressor 200 and control the water vapor compressor 200 to run to the set rotational speed;

[0161] Gradually close (such as slowly close) the fourth control valve 51 according to the set instruction;

[0162] Obtain the pressure P inside the second heat exchange unit 300 and judge whether the fourth determination condition P > P1 is established;

[0163] Based on the non - establishment of the fourth determination condition, increase the rotational speed of the water vapor compressor 200, and then execute the steps of obtaining the pressure P inside the second heat exchange unit 300 and judging whether the fourth determination condition P > P1 is established;

[0164] Based on the establishment of the fourth determination condition, control the throttling component 400 to open to a set opening degree, control the third liquid pump 91 to operate at a third set speed, control the second control valve 41 to open to a second set opening degree, and control the steam compressor 200 to operate at the current speed;

[0165] Obtain the pressure and temperature of the steam in the inter-stage connection pipeline 290, determine the superheat degree △t of the steam in the inter-stage connection pipeline 290 according to the pressure and temperature, and judge whether the first preset value K1 ≤ △t ≤ the second preset value K2 of the second determination condition is established;

[0166] Based on the non-establishment of the second determination condition, increase the opening degree of the second control valve 41, and then execute the steps of obtaining the pressure and temperature of the steam in the inter-stage connection pipeline 290, determining the superheat degree △t of the steam in the inter-stage connection pipeline 290 according to the pressure and temperature, and judging whether the first preset value K1 ≤ △t ≤ the second preset value K2 of the second determination condition is established;

[0167] Based on the establishment of the second determination condition, obtain the temperature t6 of the second cooling chamber 280, and judge whether the eighth determination condition t6 ≤ the fourth temperature threshold T4 is established;

[0168] Based on the non-establishment of the eighth determination condition, increase the speed of the third liquid pump 91, and then execute the steps of obtaining the temperature t6 of the second cooling chamber 280 and judging whether the eighth determination condition t6 ≤ the fourth temperature threshold T4 is established;

[0169] Based on the establishment of the eighth determination condition, obtain the indoor temperature t3 and the preset refrigeration temperature t4, and judge whether the fifth determination condition |t3 - t4| ≤ the third temperature threshold T3 is established;

[0170] Based on the establishment of the fifth determination condition, obtain the pressure fluctuation amplitude of the second port of the secondary compression unit 260, and judge whether the sixth determination condition that the steam compressor 200 surges (that is, the pressure fluctuation amplitude > the preset pressure fluctuation amplitude) is established according to the pressure fluctuation amplitude;

[0171] Based on the establishment of the sixth determination condition, execute the step of opening the fourth control valve 51 (to improve the pressure buildup in the steam compressor 200 and avoid continuous surging of the steam compressor 200);

[0172] Based on the non-establishment of the sixth determination condition, execute the steps of obtaining the pressure and temperature of the steam in the inter-stage connection pipeline 290, determining the superheat degree △t of the steam in the inter-stage connection pipeline 290 according to the pressure and temperature, and judging whether the first preset value K1 ≤ △t ≤ the second preset value K2 of the second determination condition is established;

[0173] Based on the non-establishment of the fifth determination condition, obtain the indoor outlet air temperature t5, and judge whether the seventh determination condition t5 ≤ t4 is established;

[0174] Based on the establishment of the seventh determination condition, the rotational speed of the first liquid pump 140 and / or the rotational speed of the indoor blower are reduced (to quickly adjust the indoor temperature t3 to the preset refrigeration temperature t4), and then the steps of obtaining the pressure and temperature of the water vapor in the inter-stage connection pipeline 290, determining the superheat degree △t of the water vapor in the inter-stage connection pipeline 290 according to the pressure and temperature, and judging whether the first preset value K1 ≤ △t ≤ the second preset value K2 of the second determination condition is established are executed;

[0175] Based on the non-establishment of the seventh determination condition, the rotational speed of the first liquid pump 140 and / or the rotational speed of the indoor blower are increased (to quickly adjust the indoor temperature t3 to the preset refrigeration temperature t4), and then the steps of obtaining the indoor temperature t3 and the preset refrigeration temperature t4, and judging whether the fifth determination condition |t3 - t4| ≤ the third temperature threshold T3 is established are executed.

[0176] Of course, one or more of the second control valve 41, the fourth control valve 51, and the seventh control valve 92 can be replaced by a water pump, and the water pump realizes flow control by changing the rotational speed, which can also achieve the purpose of the present application. Its gist does not deviate from the design concept of the present invention, and will not be elaborated here, and should also fall within the protection scope of the present application.

[0177] In summary, for the air treatment equipment provided by the present application, the water vapor compressor is operated. After the water vapor is compressed by the compression unit from the first heat exchange unit, it enters the second heat exchange unit for heat release, so that the temperature of the water vapor decreases and condensate is formed. The condensate is stored in the liquid storage tank, and then after being depressurized by the throttling component, it enters the first heat exchange unit for heat absorption, so that the temperature of the condensate increases and water vapor is formed, and so on in a cycle; during this process, a part of the fluid in the flow path formed by the liquid storage tank, the throttling component, and the first heat exchange unit will flow from the fifth control pipeline to the liquid storage tank through the second cooling chamber and the fifth matching pipeline in sequence. This part of the fluid absorbs the heat of the stator, the rotor shaft, the bearing assembly, and the housing during the process of passing through the second cooling chamber, realizing the cooling of the stator, the rotor shaft, the bearing assembly, and the housing. This solution does not require an additional cooling device for cooling the water vapor compressor, and the structure of the air treatment equipment is simpler.

[0178] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by terms such as "upper", "lower", "one side", "the other side", "one end", "the other end", "side", "opposite", "four corners", "periphery", "the structure of the 'mouth' character", etc. is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the structure referred to has a specific orientation, is constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0179] In the description of the embodiments of the present invention, unless otherwise clearly defined and limited, the terms "connection", "direct connection", "indirect connection", "fixed connection", "installation", and "assembly" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; the terms "installation", "connection", and "fixed connection" may be directly connected or indirectly connected through an intermediate medium, and may be the internal communication of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0180] Those of ordinary skill in the art can understand that all or some of the steps in the methods disclosed above, and the functional modules / units in the systems and devices, can be implemented as software, firmware, hardware, and their appropriate combinations. In the hardware implementation, the division between the functional modules / units mentioned above does not necessarily correspond to the division of physical components; for example, a physical component may have multiple functions, or a function or step may be executed by several physical components in cooperation. Some components or all components can be implemented as software executed by a processor, such as a digital signal processor or a microprocessor, or implemented as hardware, or implemented as an integrated circuit, such as an application-specific integrated circuit. Such software can be distributed on a computer-readable medium, which can include a computer storage medium (or non-transitory medium) and a communication medium (or transitory medium). As is well known to those of ordinary skill in the art, the term computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information, such as computer-readable instructions, data structures, program modules, or other data. Computer storage media include, but are not limited to, RAK, ROK, EEPROK, flash memory, or other memory technologies, CD-ROK, digital versatile disk (DVD), or other optical disk storage, magnetic cassette, tape, magnetic disk storage, or other magnetic storage devices, or any other medium that can be used to store the desired information and can be accessed by a computer. In addition, as is well known to those of ordinary skill in the art, a communication medium typically includes computer-readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transmission mechanism, and may include any information delivery medium.

Claims

1. An air treatment device, characterized in that, It includes a fifth matching pipeline, a fifth control pipeline with a third liquid pump, and a first heat exchange unit, a steam compressor, a second heat exchange unit, a liquid storage tank, and a throttling component connected in sequence; The steam compressor includes: A housing, inside which there is a stator and multiple groups of bearing assemblies, and the stator is located between the multiple groups of bearing assemblies; A rotor shaft, passing through the bearing assemblies and the stator, and the housing, the rotor shaft, the stator, and the multiple groups of bearing assemblies enclose a second cooling chamber; and A compression unit, provided at the end of the rotor shaft; Among them, the first end of the fifth control pipeline is connected to the flow path formed by the liquid storage tank, the throttling component, and the first heat exchange unit, the second end of the fifth control pipeline is connected to the first end of the second cooling chamber, the fifth control pipeline is arranged to form a fluid flowing into the second cooling chamber, the first end of the fifth matching pipeline is connected to the second end of the second cooling chamber, the second end of the fifth matching pipeline is connected to the liquid storage tank, and the fifth matching pipeline is arranged to form a fluid flowing from the second cooling chamber to the liquid storage tank.

2. The air treatment device according to claim 1, wherein The liquid storage tank has a liquid inlet, a gas return port, a first liquid outlet, and a third liquid outlet, the liquid inlet is connected to the second port of the second heat exchange unit, the first liquid outlet is connected to the throttling component, the gas return port is connected to the second end of the fifth matching pipeline, and the first end of the fifth control pipeline is connected to the third liquid outlet.

3. The air treatment device according to claim 2, wherein, The compression unit includes a primary compression unit and a secondary compression unit, the multiple groups of bearing assemblies are two groups of bearing assemblies, the two groups of bearing assemblies are located between the primary compression unit and the secondary compression unit, the first port of the primary compression unit is connected to the second port of the first heat exchange unit, the second port of the primary compression unit is connected to the first port of the secondary compression unit through an inter-stage connection pipeline, and the second port of the secondary compression unit is connected to the first port of the second heat exchange unit; The second end of the fifth control pipeline is also connected to the inter-stage connection pipeline.

4. The air treatment device according to claim 3, characterized in that, A second flow control component is provided in the flow path formed between the second end of the fifth control pipeline and the inter-stage connection pipeline; A seventh control valve is provided in the flow path formed between the second end of the fifth control pipeline and the first port of the second cooling chamber.

5. The air treatment device according to claim 2, wherein, The first heat exchange unit includes: An evaporation chamber, to which the first port of the steam compressor and the second end of the throttling component are both connected; A first heat exchanger, provided in the evaporation chamber; An indoor heat exchanger, provided outside the evaporation chamber; and A first liquid pump, connected to the first heat exchanger and the indoor heat exchanger to form a first circulation path.

6. The air treatment device according to claim 5, characterized in that, It further includes: A second heat exchanger, located outside the evaporation chamber and having a first heat exchange flow path and a second heat exchange flow path, and the first circulation path further includes the first heat exchange flow path; A third mating pipeline and a third control pipeline. A cooling flow path is formed between the stator and the housing. The third mating pipeline, the third control pipeline, the cooling flow path, and the second heat exchange flow path are connected to form a second circulation path. At least one of the third mating pipeline and the third control pipeline is provided with a second liquid pump.

7. The air treatment device according to claim 1, characterized in that, The first heat exchange unit includes: An evaporation chamber, to which the first port of the water vapor compressor, the first end of the fifth control pipeline, and the second end of the throttling component are all connected; A first heat exchanger disposed in the evaporation chamber; An indoor heat exchanger disposed outside the evaporation chamber; and A first liquid pump connected to the first heat exchanger and the indoor heat exchanger to form a first circulation path.

8. The air treatment device according to claim 7, characterized in that, It further includes: A second heat exchanger located outside the evaporation chamber and having a first heat exchange flow path and a second heat exchange flow path. The first circulation path further includes the first heat exchange flow path; A third mating pipeline and a third control pipeline. A cooling flow path is formed between the stator and the housing. The third mating pipeline, the third control pipeline, the cooling flow path, and the second heat exchange flow path are connected to form a second circulation path. At least one of the third mating pipeline and the third control pipeline is provided with a second liquid pump.

9. The air treatment device according to claim 7, characterized in that, The compression unit includes a primary compression unit and a secondary compression unit. The multiple groups of bearing assemblies are two groups of bearing assemblies. The two groups of bearing assemblies are located between the primary compression unit and the secondary compression unit. The first port of the primary compression unit is connected to the second port of the evaporation chamber. The second port of the primary compression unit is connected to the first port of the secondary compression unit through an inter-stage connection pipeline. The second port of the secondary compression unit is connected to the first port of the second heat exchange unit; The air treatment device further includes: A second control pipeline having a second flow control component. The liquid storage tank has a liquid inlet, a gas return port, a first liquid outlet, and a third liquid outlet. The liquid inlet is connected to the second port of the second heat exchange unit. The first liquid outlet is connected to the first port of the throttling component. The gas return port is connected to the second end of the fifth mating pipeline. The first end of the second control pipeline is connected to the third liquid outlet. The second end of the second control pipeline is connected to the inter-stage connection pipeline.

10. The air treatment device according to claim 7, characterized in that, The fifth control pipeline is provided with a seventh control valve.

11. The air treatment device according to any one of claims 1 to 10, characterized in that, It further includes: A fourth control pipeline having a fourth flow control component. The first end of the fourth control pipeline is connected between the water vapor compressor and the first port of the second heat exchange unit. The second end of the fourth control pipeline is connected between the water vapor compressor and the second port of the first heat exchange unit.

12. The air treatment device according to claim 5 or 7, characterized in that, It further includes: An indoor fan correspondingly arranged with the indoor heat exchanger; and An outdoor fan correspondingly arranged with the second heat exchange unit.

13. A control method for an air handling device according to any one of claims 1 to 12, characterized in that, It includes: Obtaining the temperature t6 of the second cooling chamber and controlling the amount of water supplied from the fifth control pipeline to the second cooling chamber according to the t6.

14. The control method according to claim 13, characterized in that The step of controlling the amount of water supplied from the fifth control pipeline to the second cooling chamber according to the t6 includes: Determine whether the eighth determination condition t6 ≤ the fourth temperature threshold T4 holds; Based on the non - establishment of the eighth determination condition, increase the rotation speed of the third liquid pump or increase the opening degree of the seventh control valve.

15. The control method according to claim 13, characterized in that, It also includes: Obtain the pressure and temperature of the water vapor in the inter - stage connection pipeline, determine the superheat degree △t of the water vapor in the inter - stage connection pipeline according to the pressure and temperature, and determine whether the second determination condition the first preset value K1 ≤ △t ≤ the second preset value K2 holds; Based on the non - establishment of the second determination condition, increase the opening degree of the second flow control component; Wherein, the second flow control component is the second control valve.

16. The control method according to claim 13, wherein It also includes: Obtain the temperature t2 of the stator, and determine whether the third determination condition t2 ≤ the second temperature threshold T2 holds; Based on the non - establishment of the third determination condition, increase the rotation speed of the second liquid pump.

17. The control method according to any one of claims 13 to 16, characterized in that, Before the step of obtaining the temperature t6 of the second cooling chamber and controlling the water volume supplied to the second cooling chamber from the fifth control pipeline according to the t6, the control method further includes: Control the first liquid pump to operate at the first set speed, and control the second liquid pump to operate at the second set speed; Open the fourth control valve; Start the water vapor compressor and control the water vapor compressor to run to the set rotation speed; Gradually close the fourth control valve according to the set instruction, then obtain the pressure P inside the second heat exchange unit, and determine whether the fourth determination condition P > the preset pressure P1 holds; Based on the non - establishment of the fourth determination condition, increase the rotation speed of the water vapor compressor; Based on the establishment of the fourth determination condition, control the throttling component to open to the set opening degree, control the third liquid pump to operate at the third set speed, and control the water vapor compressor to operate at the current rotation speed.

18. The control method according to claim 17, wherein Before the step of controlling the first liquid pump to operate at the first set speed and controlling the second liquid pump to operate at the second set speed, the control method further includes: Obtain the initial pressure and initial water level in the evaporation chamber, and control the vacuum pumping device and the water injection device connected to the evaporation chamber according to the pressure and water level to adjust the initial pressure in the evaporation chamber to the set pressure and the initial water level in the evaporation chamber to the set water level.

19. The control method according to claim 17, wherein After the step of obtaining the temperature t6 of the second cooling chamber and controlling the water volume supplied to the second cooling chamber from the fifth control pipeline according to the t6, the control method further includes: Obtain the indoor temperature t3 and the preset refrigeration temperature t4, and determine whether the fifth determination condition |t3 - t4| ≤ the third temperature threshold T3 holds; Based on the establishment of the fifth determination condition, obtain the pressure fluctuation amplitude of the second port of the two - stage compression unit, and determine whether the sixth determination condition the water vapor compressor surges holds according to the pressure fluctuation amplitude; Based on the establishment of the sixth determination condition, execute the step of opening the fourth control valve; Based on the non - establishment of the sixth determination condition, maintain the current operating state.

20. According to the control method described in claim 19, characterized in that, Based on the non - establishment of the fifth determination condition, obtain the indoor air outlet temperature t5, and determine whether the seventh determination condition t5 ≤ t4 holds; If the seventh determination condition is satisfied, reduce the rotational speed of the first liquid pump and / or the rotational speed of the indoor fan, and then perform the step of obtaining the temperature t6 of the second cooling chamber and controlling the amount of water supplied to the second cooling chamber from the fifth control pipeline according to the t6; If the seventh determination condition is not satisfied, increase the rotational speed of the first liquid pump and / or the rotational speed of the indoor fan, and then perform the step of obtaining the indoor temperature t3 and the preset refrigeration temperature t4, and determining whether the fifth determination condition |t3 - t4| ≤ the third temperature threshold T3 is satisfied.

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