Water vapor compressor, air conditioner and control method

Abstract

The invention provides a water vapor compressor, an air conditioner and a control method. The water vapor compressor comprises a compressor main body which comprises a first-stage compression unit, a second-stage compression unit and a driving unit in transmission connection with the first-stage compression unit and the second-stage compression unit, and the driving unit is provided with a cooling passage; a first port of the connecting passage is communicated with a second port of the first-stage compression unit, and a second port of the connecting passage is communicated with a first port of the second-stage compression unit; a first port of the first flow regulating passage is communicated with the connecting passage, a second port of the first flow regulating passage is communicated with a first port of the cooling passage, and a second port of the cooling passage is communicated with a first port of the primary compression unit. The water vapor compressor is applied to the air conditioner, water vapor in the air conditioner is adopted for cooling the driving unit, the air conditioner does not need to be externally connected with a water cooling tower, and therefore the problems that liquid is absorbed by the air conditioner and non-condensable gas is increased are solved.

Description

Technical Field

[0001] The present application relates to but is not limited to the field of air conditioning technology, and specifically refers to a water vapor compressor, an air conditioner and a control method. Background Art

[0002] In the air-conditioning industry, CFCs (chlorofluorocarbons) and HCFCs (hydrochlorofluorocarbons) have been widely used. With the increasing attention paid to ozone layer depletion and greenhouse gas issues at home and abroad, countries around the world have accelerated the pace of research and development of new refrigerants to address the climate threats brought about by the growing market demand.

[0003] Among various alternative refrigerants, hydrocarbons, ammonia, carbon dioxide, etc., have received high attention because they are derived from nature and do not cause any harm to the natural environment. Among them, the main problem faced by the use of hydrocarbons is flammability. They are currently used in small household refrigeration units and some industrial refrigeration units. Ammonia may pose a threat to human life safety after leakage, so it has not yet been used in household and central air-conditioning refrigeration units. Carbon dioxide does not have flammability and toxicity problems, but the circulation pressure is high and the COP (coefficient of effectiveness) value is low. Water is non-toxic, easy to prepare, the system operates in a vacuum environment, has high safety, high latent heat of vaporization, and can use direct heat exchange. The system circulation COP value is high, which has great advantages in the replacement of refrigerants.

[0004] At present, for refrigeration systems using conventional refrigerants, most household systems use rotor or piston compressors, and most cooling forms use refrigerant heat dissipation, with the refrigerant dissipating and compressing in the compression chamber. Most commercial systems use external water cooling towers for heat dissipation.

[0005] The water vapor compressor used in the water refrigeration system is a high-speed centrifugal compressor. Heat dissipation is particularly important for the normal operation of the system. Water is used as the refrigerant and the operating conditions are under negative pressure. Using an external water cooling tower for cooling will cause the system to absorb liquid or increase non-condensable gases. Therefore, this cooling method cannot be applied to water vapor compressors. Summary of the invention

[0006] The technical problem to be solved by the present application is to provide a water vapor compressor that can achieve cooling under normal and stable operation.

[0007] The present application also provides an air conditioner and a method for controlling the air conditioner.

[0008] The water vapor compressor proposed in the embodiment of the present invention includes: a compressor main body, including a primary compression unit, a secondary compression unit and a driving unit that is transmission-connected to the primary compression unit and the secondary compression unit, the driving unit is provided with a cooling passage; a connecting passage, a first port of which is connected to the second port of the primary compression unit, and a second port of which is connected to the first port of the secondary compression unit; and a first flow regulating passage, a first port of which is connected to the connecting passage, a second port of which is connected to the first port of the cooling passage, and the second port of the cooling passage is connected to the first port of the primary compression unit; a cooling mechanism, which is connected to the connecting passage and is located upstream of the first port of the first flow regulating passage.

[0009] In some exemplary implementations, the cooling mechanism includes: a second flow regulating passage, whose second port is located upstream of the first port of the first flow regulating passage and is connected to the second port of the first compression unit, and whose first port is configured to connect water formed by cooling water vapor.

[0010] In some exemplary implementations, the second flow regulating passage includes a second regulating passage and a second regulating valve disposed in the second regulating passage.

[0011] In some exemplary implementations, the water vapor compressor further includes: a third flow regulating passage, a second port of which is in communication with the second port of the secondary compression unit, and a first port of which is configured to communicate with water formed by cooling the water vapor.

[0012] In some exemplary implementations, the third flow regulating passage includes a third regulating passage and a third regulating valve disposed in the third regulating passage.

[0013] In some exemplary implementations, the first flow regulating passage includes a first regulating passage and a first regulating valve disposed in the first regulating passage.

[0014] The air conditioner proposed in an embodiment of the present invention includes the water vapor compressor, the first heat exchanger, the second heat exchanger and the throttling component described in any of the above embodiments, the first port of the first heat exchanger is connected to the second port of the secondary compression unit, the second port is connected to the first port of the second heat exchanger through the throttling component, and the second port of the second heat exchanger is connected to the first port of the primary compression unit.

[0015] In some exemplary embodiments, the cooling mechanism includes a second flow regulating passage, the water vapor compressor includes a third flow regulating passage, the second port of the second flow regulating passage is located upstream of the first port of the first flow regulating passage and is connected to the second port of the first compression unit, and the second port of the third flow regulating passage is connected to the second port of the second compression unit; the air conditioner also includes: a water pump, which is arranged between the first heat exchanger and the throttling component, and the first port of the second flow regulating passage and the first port of the third flow regulating passage are both connected between the water pump and the throttling component.

[0016] In some exemplary embodiments, the cooling mechanism includes a second flow regulating passage, a second port of the second flow regulating passage is located upstream of the first port of the first flow regulating passage and is connected to the second port of the first compression unit; the air conditioner also includes: a water pump, arranged between the first heat exchanger and the throttling component, and the first port of the second flow regulating passage is connected between the water pump and the throttling component.

[0017] In some exemplary implementations, the water vapor compressor includes a third flow regulating passage, a second port of the third flow regulating passage is connected to the second port of the secondary compression unit; the air conditioner also includes: a water pump, arranged between the first heat exchanger and the throttling component, and the first port of the third flow regulating passage is connected between the water pump and the throttling component.

[0018] The control method of the air conditioner provided in the embodiment of the present invention includes:

[0019] Acquire the temperature T of the driving unit and the superheat C of the water vapor in the first port of the first-stage compression unit;

[0020] According to T and C, the flow rate of the first flow regulating passage is controlled.

[0021] In some exemplary implementations, the step of controlling the flow of the first flow regulating passage according to T and C includes:

[0022] Based on the first temperature threshold T 1 ≤T≤Second temperature threshold T 2 and the first superheat threshold C 1 ≤C≤Second superheat threshold C 2 If at least one of the two judgment conditions is not met, the opening of the first regulating valve is adjusted so that T 1 ≤T≤T 2 , C 1 ≤C≤C 2 , T 1 <T 2 , C1 <C 2 .

[0023] In some exemplary implementations, the control method further includes:

[0024] Obtaining the superheat degree A of the water vapor in the connecting passage;

[0025] According to A, the flow rate of the second flow regulating passage is controlled.

[0026] In some exemplary implementations, the step of controlling the flow of the second flow regulating passage includes:

[0027] Adjust the opening of the second regulating valve to adjust the superheat of the water vapor in the connecting passage to A. 1 ~A 2 , A 1 <A 2 .

[0028] In some exemplary implementations, the control method further includes:

[0029] Obtaining a superheat degree B of water vapor in a pipeline between the second port of the secondary compression unit and the first port of the first heat exchanger;

[0030] According to B, the flow rate of the third flow regulating passage is controlled.

[0031] In some exemplary implementations, the step of controlling the flow of the third flow regulating passage includes:

[0032] Adjust the opening of the third regulating valve to adjust the superheat of the water vapor in the pipeline to B 1 ~B 2 , B 1 <B 2 .

[0033] The control method of the air conditioner provided in the embodiment of the present invention includes:

[0034] Obtaining the superheat degree A of the water vapor in the connecting passage;

[0035] According to A, adjust the opening of the second regulating valve so that the superheat of the water vapor in the connecting passage is adjusted to A. 1 ~A 2 , A 1 <A 2 .

[0036] The control method of the air conditioner provided in the embodiment of the present invention includes:

[0037] Obtaining a superheat degree B of water vapor in a pipeline between the second port of the secondary compression unit and the first port of the first heat exchanger;

[0038] According to B, adjust the opening of the third regulating valve to adjust the superheat of the water vapor in the pipeline to B 1 ~B 2 , B 1 <B 2 .

[0039] The technical solution provided by the embodiment of the present invention is that the compressor body includes a primary compression unit, a secondary compression unit and a driving unit that is transmission-connected to the primary compression unit and the secondary compression unit, the driving unit is provided with a cooling passage, the first port of the connecting passage is communicated with the second port of the primary compression unit, the second port of the connecting passage is communicated with the first port of the secondary compression unit, the first port of the first flow regulating passage is communicated with the connecting passage, the second port of the first flow regulating passage is communicated with the first port of the cooling passage, the second port of the cooling passage is communicated with the first port of the primary compression unit, the cooling mechanism is connected to the connecting passage and is located upstream of the first port of the first flow regulating passage, and is used to cool the connecting passage. The water vapor in the connection passage is cooled, and the water vapor compressor is applied to the air conditioner, and the water vapor inside the air conditioner is used to cool the driving unit. The air conditioner does not need an external water cooling tower, so the air conditioner will not have the problem of absorbing liquid and increasing non-condensable gas. In addition, the water vapor for cooling the driving unit is passed into the first port of the first-stage compression unit, and the superheat of the air sucked at the first port of the first-stage compression unit can also be increased, so as to realize the flash evaporation of the liquid water carried by the water vapor entering the first-stage compression unit, and ensure that the refrigerant entering the first-stage compression unit is all water vapor, so as to prevent the occurrence of wet compression and the damage to the compressor and the reduction of the refrigeration effect. Therefore, the operation stability of the water vapor compressor of this scheme is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 A schematic block diagram of the structure of an air conditioner provided in some embodiments;

[0041] Figure 2 A flow chart of a method for controlling an air conditioner provided in some embodiments;

[0042] Figure 3 A flow chart of a method for controlling an air conditioner provided in some other embodiments;

[0043] Figure 4 A flow chart of a method for controlling an air conditioner provided in some other embodiments;

[0044] Figure 5 A flow chart of a method for controlling an air conditioner provided in some further embodiments;

[0045] Figure 6 A flowchart of a method for controlling an air conditioner provided in some further embodiments.

[0046] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0047] 100 first heat exchanger, 200 second heat exchanger, 300 throttling component, 400 primary compression unit, 500 secondary compression unit, 600 driving unit, 610 cooling passage, 700 connecting passage, 810 first regulating valve, 820 first regulating passage, 910 second regulating passage, 920 second regulating valve, 1010 third regulating passage, 1020 third regulating valve, 1100 water pump, 1200 pipeline. DETAILED DESCRIPTION

[0048] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0049] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0050] In addition, in the present invention, the descriptions of "first", "second", etc. are only used 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 defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0051] In the present invention, unless otherwise clearly defined and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; "connection" can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0053] The air conditioner provided in the embodiment of the present invention is as follows: Figure 1 As shown, it includes a water vapor compressor, a first heat exchanger 100, a second heat exchanger 200 and a throttling component 300. The water vapor compressor includes: a compressor body, the compressor body includes a primary compression unit 400, a secondary compression unit 500 and a driving unit 600 that is transmission-connected to the primary compression unit 400 and the secondary compression unit 500, and the driving unit 600 is provided with a cooling passage 610; a connecting passage 700, the first port of the connecting passage 700 is communicated with the second port of the primary compression unit 400, and the second port of the connecting passage 700 is communicated with the first port of the secondary compression unit 500; and a first flow regulating passage, the first port of the first flow regulating passage is communicated with the connecting passage 700, the second port of the first flow regulating passage is communicated with the first port of the cooling passage 610, and the second port of the cooling passage 610 is communicated with the first port of the primary compression unit 400; a cooling mechanism, which is connected to the connecting passage 700 and is located upstream of the first port of the first flow regulating passage, and is used to cool the water vapor in the connecting passage 700. The first port of the first heat exchanger 100 is connected to the second port of the secondary compression unit 500, the second port of the first heat exchanger 100 is connected to the first port of the second heat exchanger 200 through the throttling component 300, and the second port of the second heat exchanger 200 is connected to the first port of the primary compression unit 400. The throttling component may be configured as an expansion valve.

[0054] The air conditioner uses the water vapor cooled by the cooling mechanism inside the system to cool the driving unit 600. The air conditioner does not need an external water cooling tower (or other cooling device), so the air conditioner will not have the problem of absorbing liquid and increasing non-condensable gas. In addition, the water vapor used to cool the driving unit 600 is passed into the first port of the primary compression unit 400, which can also increase the superheat of the air sucked by the first port of the primary compression unit 400, and realize flash evaporation of liquid water carried by the water vapor entering the primary compression unit 400, thereby ensuring that the refrigerant entering the primary compression unit 400 is all water vapor, preventing wet compression from causing damage to the compressor and reducing the refrigeration effect. Therefore, the air conditioner with this solution has better operating stability.

[0055] like Figure 1 As shown, the first ports in the present application are all configured as inlets, and the second ports are all configured as outlets.

[0056] In some examples, such as Figure 1As shown, the first flow regulating passage includes a first regulating passage 820 and a first regulating valve 810. The first regulating valve 810 is arranged in the first regulating passage 820. The flow of the first regulating passage 820 is adjusted by adjusting the opening of the first regulating valve 810, so as to achieve the purpose of adjusting the temperature of the driving unit 600 and the superheat of the water vapor in the first port of the first compression unit 400.

[0057] In some embodiments, Figure 1 As shown, the first regulating valve 810 is configured as a throttle valve.

[0058] In some exemplary implementations, Figure 1 As shown, the cooling mechanism includes a second flow regulating passage, the water vapor compressor includes a third flow regulating passage, the second port of the second flow regulating passage is located upstream of the first port of the first flow regulating passage, and the second port of the second flow regulating passage is connected to the second port of the first compression unit 400, and the second port of the third flow regulating passage is connected to the second port of the second compression unit 500. The air conditioner also includes: a water pump 1100, the water pump 1100 is arranged between the first heat exchanger 100 and the throttling component 300, and the first port of the second flow regulating passage and the first port of the third flow regulating passage are both connected between the water pump 1100 and the throttling component 300.

[0059] like Figure 1As shown, the water vapor discharged after being compressed by the secondary compression unit 500 flows into the first heat exchanger 100 for condensation, condensed into liquid water and supercooled water, and the liquid water and supercooled water passing through the throttling component 300 are depressurized and throttled to reduce the pressure to the saturation temperature corresponding to the evaporation temperature, and then flow into the second heat exchanger 200 for refrigeration. The second heat exchanger 200 is a full liquid indirect heat exchanger. The liquid refrigerant water evaporates in the second heat exchanger 200, absorbs the heat of the room, and reduces the temperature of the room. In the second heat exchanger 200, the liquid water evaporates and absorbs the heat of the room, turning into saturated water vapor. At this time, the saturated water vapor flows through the primary compression unit 400 and the secondary compression unit 500 in sequence for compression, thereby increasing the pressure and temperature of the water vapor. Since the superheat of water vapor is relatively large after the primary compression and the secondary compression, a part of the water, such as supercooled water, passing through the water pump 1100 is supplied into the connecting passage 700 through the second flow regulating passage, and the water vapor compressed by the primary compression unit 400 is inter-stage cooled and cooled, thereby reducing the superheat of the water vapor compressed by the primary compression; another part of the water, such as supercooled water, passing through the water pump 1100 is supplied into the pipeline 1200 between the second port of the secondary compression unit 500 and the first port of the first heat exchanger 100 through the third flow regulating passage, and the water vapor compressed by the secondary compression is cooled and cooled, thereby reducing the superheat of the water vapor compressed by the secondary compression unit 500. This scheme not only reduces the power consumption of the water vapor compressor, thereby improving the system performance, but also reduces the design difficulty and processing requirements of the water vapor compressor; another part of the water, such as supercooled water, passing through the water pump 1100 is depressurized and throttled through the throttling component 300, and the pressure is reduced to the saturation temperature corresponding to the evaporation temperature, and flows into the second heat exchanger 200 for refrigeration. Part of the water vapor that has undergone inter-stage cooling in the connecting passage 700 enters the cooling passage 610 through the first flow regulating passage (the other part enters the secondary compression unit 500 from the first port of the secondary compression unit 500), cools the driving unit 600, and then enters the first port of the primary compression unit 400. This can increase the superheat of the suction air at the first port of the primary compression unit 400, and realize flash evaporation of the liquid water carried by the water vapor entering the primary compression unit 400, thereby ensuring that the refrigerant entering the primary compression unit 400 is all water vapor, thereby preventing wet compression from causing damage to the compressor and reducing the refrigeration effect.

[0060] In some examples, such as Figure 1 As shown, the second flow regulating passage includes a second regulating passage 910 and a second regulating valve 920, and the second regulating valve 920 is arranged in the second regulating passage 910; the third flow regulating passage includes a third regulating passage 1010 and a third regulating valve 1020, and the third regulating valve 1020 is arranged in the third regulating passage 1010.

[0061] In some embodiments, Figure 1As shown, the second regulating valve 920 and the third regulating valve 1020 are both configured as throttle valves.

[0062] Of course, it is also possible to only set up the second flow regulating passage without setting up the third flow regulating passage; of course, it is also possible to only set up the third flow regulating passage without setting up the second flow regulating passage, and the cooling mechanism can be set up as a semiconductor cooler in this case; all of the above can achieve the purpose of the present application, and its purpose does not deviate from the design concept of the present invention, and will not be repeated here, and should all fall within the protection scope of the present application.

[0063] In some embodiments, Figure 1 As shown, the first-stage compression unit 400 includes a first-stage impeller, the second-stage compression unit 500 includes a second-stage impeller, the driving unit 600 is a driving motor, the driving shaft of the driving motor is located between the first-stage impeller and the second-stage impeller, and connects the first-stage impeller and the second-stage impeller, the first-stage impeller and the second-stage impeller are symmetrically arranged, and the second port of the first-stage compression unit 400 and the second port of the second-stage compression unit 500 are located between the first port of the first-stage compression unit 400 and the first port of the second-stage compression unit 500.

[0064] The control method of the air conditioner provided in the embodiment of the present invention is as follows: Figure 4 As shown, including:

[0065] Obtaining the temperature T of the driving unit 600 and the superheat C of the water vapor in the first port of the primary compression unit 400;

[0066] According to T and C, the flow rate of the first flow regulating passage is controlled.

[0067] The control method of the air conditioner controls the flow of the first flow regulating passage according to the temperature T of the driving unit 600 and the superheat C of the water vapor in the first port of the first compression unit 400, and adjusts the temperature of the water vapor in the cooling passage 610 and the superheat of the water vapor in the first port of the first compression unit 400, so that the driving unit 600 operates within the operating temperature range and ensures that all the refrigerant entering the first compression unit 400 from the first port of the first compression unit 400 is water vapor.

[0068] In some examples, such as Figures 2 to 4 As shown, according to T and C, the step of controlling the flow of the first flow regulating passage includes:

[0069] Based on the first temperature threshold T 1 ≤T≤Second temperature threshold T 2 and the first superheat threshold C 1 ≤C≤Second superheat threshold C 2 If at least one of the two judgment conditions is not satisfied, the opening of the first regulating valve 810 is adjusted so that T1 ≤T≤T 2 , C 1 ≤C≤C 2 , T 1 <T 2 , 0<C 1 <C 2 , so that the drive unit 600 operates within the operating temperature range [T 1 ,T 2 】, and ensure that the refrigerant entering the primary compression unit 400 from the first port of the primary compression unit 400 is all water vapor, so that the operating performance of the water vapor compressor is better and the operating efficiency of the air conditioner is higher, C 1 , C 2 and T 1 and T 2 The specific value of can be reasonably set by technicians in this field as needed. It can be, C 1 Set to 2°C 2 Set to 5°C.

[0070] In some exemplary implementations, Figure 2 and Figure 3 As shown, the control method also includes:

[0071] Obtaining the superheat A of the water vapor in the connecting passage 700 (such as obtaining the superheat of the water vapor at the first port of the secondary compression unit 500);

[0072] According to A, the flow rate of the second flow regulating passage is controlled.

[0073] According to the superheat A of the water vapor in the connecting passage (such as the water vapor at the first port of the secondary compression unit 500), the flow of the second flow regulating passage is controlled to adjust the superheat of the water vapor flowing into the secondary compression unit 500, thereby reducing the superheat of the water vapor entering the secondary compression unit 500.

[0074] In some examples, such as Figure 2 and Figure 3 As shown, according to A, the step of controlling the flow of the second flow regulating passage includes:

[0075] Based on A 1 ≤A≤A 2 If the condition is not established, the opening of the second regulating valve 920 is adjusted so that the superheat of the water vapor in the connecting passage 700 (such as the water vapor at the first port of the secondary compression unit 500) is adjusted to A. 1 ~A 2 , A 1 <A 2 . A 1 , A 2Those skilled in the art can make reasonable settings as needed, which can be: 1 Set to 1℃, A 2 Set to 2°C.

[0076] In some exemplary implementations, Figure 2 and Figure 3 As shown, the control method also includes:

[0077] Obtaining the superheat B of the water vapor in the pipeline 1200 between the second port of the secondary compression unit 500 and the first port of the first heat exchanger 100 (such as obtaining the superheat of the water vapor at the first port of the first heat exchanger 100);

[0078] According to B, the flow rate of the third flow regulating passage is controlled.

[0079] According to the superheat B of the water vapor in the pipeline 1200 (such as the water vapor at the first port of the first heat exchanger 100), the flow of the third flow regulating passage is controlled to adjust the superheat of the water vapor flowing into the first heat exchanger 100, thereby reducing the superheat of the water vapor entering the first heat exchanger 100.

[0080] In some exemplary implementations, Figure 2 and Figure 3 As shown, according to B, the step of controlling the flow of the third flow regulating passage includes:

[0081] Based on B 1 ≤B≤B 2 If the opening of the third regulating valve 1020 is not established, the superheat of the water vapor in the pipeline 1200 (such as the water vapor at the first port of the first heat exchanger 100) is adjusted to B. 1 ~B 2 , B 1 <B 2 . B 1 , B 2 Those skilled in the art can make reasonable settings as needed, which can be: 1 Set to 1℃, B 2 Set to 2°C.

[0082] The embodiment of the present invention provides a method for controlling an air conditioner. Figure 2 and Figure 3 As shown, including:

[0083] Obtaining the superheat A of the water vapor at the first port of the secondary compression unit 500;

[0084] Based on A 1 ≤A≤A 2If the condition is not established, the opening of the second regulating valve 920 is adjusted so that the superheat of the water vapor at the first port of the secondary compression unit 500 (that is, the superheat of the first port of the first flow regulating passage) is adjusted to A. 1 ~A 2 , A 1 <A 2 ;

[0085] Obtaining the temperature T of the driving unit 600 and the superheat C of the water vapor in the first port of the primary compression unit 400;

[0086] Based on the first temperature threshold T 1 ≤T≤Second temperature threshold T 2 and the first superheat threshold C 1 ≤C≤Second superheat threshold C 2 If at least one of the two judgment conditions is not satisfied, the opening of the first regulating valve 810 is adjusted so that T 1 ≤T≤T 2 , C 1 ≤C≤C 2 , T 1 <T 2 , 0<C 1 <C 2 ;

[0087] Obtaining the superheat degree B of the water vapor at the first port of the first heat exchanger 100;

[0088] Based on B 1 ≤B≤B 2 If the condition is not established, the opening of the third regulating valve 1020 is adjusted to adjust the superheat of the water vapor at the first port of the first heat exchanger 100 to B. 1 ~B 2 , B 1 <B 2 .

[0089] The control method of the air conditioner provided in the embodiment of the present invention is as follows: Figure 5 As shown, including:

[0090] Obtaining the superheat A of the water vapor in the connecting passage 700 (such as obtaining the superheat of the water vapor at the first port of the secondary compression unit 500);

[0091] According to A, the flow rate of the second flow regulating passage is controlled.

[0092] According to the superheat A of the water vapor in the connecting passage (such as the water vapor at the first port of the secondary compression unit 500), the flow of the second flow regulating passage is controlled to adjust the superheat of the water vapor flowing into the secondary compression unit 500, thereby reducing the superheat of the water vapor entering the secondary compression unit 500.

[0093] In some examples, such as Figure 5 As shown, according to A, the step of controlling the flow of the second flow regulating passage includes:

[0094] Based on A 1 ≤A≤A 2 If the condition is not established, the opening of the second regulating valve 920 is adjusted so that the superheat of the water vapor in the connecting passage 700 (such as the water vapor at the first port of the secondary compression unit 500) is adjusted to A. 1 ~A 2 , A 1 <A 2 . A 1 , A 2 Those skilled in the art can make reasonable settings as needed, which can be: 1 Set to 1℃, A 2 Set to 2°C.

[0095] The control method of the air conditioner provided in the embodiment of the present invention is as follows: Figure 6 As shown, including:

[0096] Obtaining the superheat B of the water vapor in the pipeline 1200 between the second port of the secondary compression unit 500 and the first port of the first heat exchanger 100 (such as obtaining the superheat of the water vapor at the first port of the first heat exchanger 100);

[0097] According to B, the flow rate of the third flow regulating passage is controlled.

[0098] According to the superheat B of the water vapor in the pipeline 1200 (such as the water vapor at the first port of the first heat exchanger 100), the flow of the third flow regulating passage is controlled to adjust the superheat of the water vapor flowing into the first heat exchanger 100, thereby reducing the superheat of the water vapor entering the first heat exchanger 100.

[0099] In some exemplary implementations, Figure 6 As shown, according to B, the step of controlling the flow of the third flow regulating passage includes:

[0100] Based on B 1 ≤B≤B 2 If the opening of the third regulating valve 1020 is not established, the superheat of the water vapor in the pipeline 1200 (such as the water vapor at the first port of the first heat exchanger 100) is adjusted to B. 1 ~B 2 , B 1 <B 2 . B 1 , B 2 Those skilled in the art can make reasonable settings as needed, which can be: 1 Set to 1℃, B2 Set to 2°C.

[0101] In summary, the technical solution provided by the embodiment of the present invention is that the compressor body includes a primary compression unit, a secondary compression unit and a driving unit that is transmission-connected to the primary compression unit and the secondary compression unit, the driving unit is provided with a cooling passage, the first port of the connecting passage is communicated with the second port of the primary compression unit, the second port of the connecting passage is communicated with the first port of the secondary compression unit, the first port of the first flow regulating passage is communicated with the connecting passage, the second port of the first flow regulating passage is communicated with the first port of the cooling passage, the second port of the cooling passage is communicated with the first port of the primary compression unit, the cooling mechanism is connected to the connecting passage and is located upstream of the first port of the first flow regulating passage, and is used to The water vapor in the connecting passage is cooled, and the water vapor compressor is applied to the air conditioner. The water vapor inside the air conditioner is used to cool the driving unit. The air conditioner does not need an external water cooling tower, so the air conditioner will not have the problem of absorbing liquid and increasing non-condensable gas. In addition, the water vapor used to cool the driving unit is passed into the first port of the first-stage compression unit, which can also increase the superheat of the air sucked at the first port of the first-stage compression unit, and realize flash evaporation of liquid water carried by the water vapor entering the first-stage compression unit, thereby ensuring that the refrigerant entering the first-stage compression unit is all water vapor, preventing wet compression from causing damage to the compressor and reducing the refrigeration effect. Therefore, the operating stability of the water vapor compressor in this scheme is better.

[0102] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0103] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0104] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0105] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0106] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0107] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A water vapor compressor, characterized in that: include: The compressor body comprises a primary compression unit, a secondary compression unit and a driving unit which is transmission-connected to the primary compression unit and the secondary compression unit, wherein the driving unit is provided with a cooling passage; A connecting passage, a first port of which is in communication with the second port of the primary compression unit, and a second port of which is in communication with the first port of the secondary compression unit; and a first flow regulating passage, a first port of which is in communication with the connecting passage, a second port of which is in communication with the first port of the cooling passage, and a second port of which is in communication with the first port of the primary compression unit; A cooling mechanism is connected to the connection passage and is located upstream of the first port of the first flow regulating passage.

2. The water vapor compressor according to claim 1, characterized in that: The cooling mechanism comprises: The second flow regulating passage has a second port located upstream of the first port of the first flow regulating passage and communicated with the second port of the first compression unit, and a first port configured to communicate with water formed by cooling water vapor.

3. The water vapor compressor according to claim 2, characterized in that: The second flow regulating passage includes a second regulating passage and a second regulating valve disposed in the second regulating passage.

4. The water vapor compressor according to claim 1, characterized in that: Also includes: The third flow regulating passage has a second port connected to the second port of the secondary compression unit, and a first port configured to connect to water formed by cooling water vapor.

5. The water vapor compressor according to claim 4, characterized in that: The third flow regulating passage includes a third regulating passage and a third regulating valve disposed in the third regulating passage.

6. The water vapor compressor according to any one of claims 1 to 5, characterized in that: The first flow regulating passage includes a first regulating passage and a first regulating valve disposed in the first regulating passage.

7. An air conditioner, characterized in that: It comprises a water vapor compressor according to any one of claims 1 to 6, a first heat exchanger, a second heat exchanger and a throttling component, wherein the first port of the first heat exchanger is connected to the second port of the secondary compression unit, the second port is connected to the first port of the second heat exchanger through the throttling component, and the second port of the second heat exchanger is connected to the first port of the primary compression unit.

8. The air conditioner according to claim 7, characterized in that: The cooling mechanism includes a second flow regulating passage, the water vapor compressor includes a third flow regulating passage, the second port of the second flow regulating passage is located upstream of the first port of the first flow regulating passage and communicates with the second port of the primary compression unit, and the second port of the third flow regulating passage is communicated with the second port of the secondary compression unit; The air conditioner also includes: A water pump is disposed between the first heat exchanger and the throttling component. The first port of the second flow regulating passage and the first port of the third flow regulating passage are both connected between the water pump and the throttling component.

9. A method for controlling an air conditioner according to claim 7 or 8, characterized in that: include: Acquire the temperature T of the driving unit and the superheat C of the water vapor in the first port of the first-stage compression unit; According to T and C, the flow rate of the first flow regulating passage is controlled.

10. The control method according to claim 9, characterized in that: The step of controlling the flow of the first flow regulating passage according to T and C comprises: Based on the fact that at least one of the two judgment conditions of the first temperature threshold T1≤T≤the second temperature threshold T2 and the first superheat threshold C1≤C≤the second superheat threshold C2 is not met, the opening of the first regulating valve is adjusted so that T1≤T≤T2, C1≤C≤C2, T1<T2, C1<C2.

11. The control method according to claim 9 or 10, characterized in that: Also includes: Obtaining the superheat degree A of the water vapor in the connecting passage; According to A, the flow rate of the second flow regulating passage is controlled.

12. The control method according to claim 11, characterized in that: The step of controlling the flow of the second flow regulating passage comprises: The opening degree of the second regulating valve is adjusted so that the superheat of the water vapor in the connecting passage is adjusted to A1-A2, where A1<A2.

13. The control method according to claim 9 or 10, characterized in that: Also includes: Obtaining a superheat degree B of water vapor in a pipeline between the second port of the secondary compression unit and the first port of the first heat exchanger; According to B, the flow rate of the third flow regulating passage is controlled.

14. The control method according to claim 13, characterized in that: The step of controlling the flow of the third flow regulating passage comprises: The opening of the third regulating valve is adjusted so that the superheat of the water vapor in the pipeline is adjusted to B1-B2, B1<B2.

15. A method for controlling an air conditioner according to claim 7 or 8, characterized in that: include: Obtaining the superheat degree A of the water vapor in the connecting passage; According to A, the opening degree of the second regulating valve is adjusted to adjust the superheat of the water vapor in the connecting passage to A1-A2, A1<A2.

16. A method for controlling an air conditioner according to claim 7 or 8, characterized in that: include: Obtaining a superheat degree B of water vapor in a pipeline between the second port of the secondary compression unit and the first port of the first heat exchanger; According to B, the opening of the third regulating valve is adjusted to adjust the superheat of the water vapor in the pipeline to B1-B2, B1<B2.

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