Chillers and air conditioning systems

Abstract

The present invention discloses a chiller and an air conditioning system, wherein the chiller comprises: a compressor, whose exhaust port is connected to the refrigerant inlet of a condenser; an economizer, whose liquid inlet is connected to the refrigerant outlet of the condenser through a first pipeline; the liquid discharge port of the economizer is connected to the inlet of an evaporator through a second pipeline; the exhaust port of the evaporator is connected to the air inlet of the compressor; and an ejector, the ejector comprising a first air inlet and a second air inlet; the first air inlet is connected to the exhaust port of the condenser; the second air inlet is connected to the exhaust port of the economizer through a third pipeline; the exhaust port of the ejector is connected to the air supply port of the compressor through a fourth pipeline. The present invention omits a separate power device by arranging an ejector on the air supply pipeline of the chiller, and can use the pressure difference to eject the saturated vapor in the economizer to the intermediate pressure of the two-stage compression, thereby achieving performance improvement under all working conditions.

Description

Technical Field

[0001] The present invention relates to the field of refrigeration, and in particular to a chiller and an air-conditioning system. Background Art

[0002] In the existing technology, the research and application of magnetic suspension variable frequency centrifuges are becoming more and more extensive. Its main features are oil-free operation and high efficiency and energy saving. It is mainly used in industrial and commercial comfort air conditioning and process air conditioning places.

[0003] Generally, magnetic levitation centrifuges are two-stage compression. Usually, the energy efficiency of the system with intermediate air supply can be improved by more than 5% under nominal working conditions compared with the system without intermediate air supply, and the energy saving effect is significant. The system with intermediate air supply usually adopts one of the two forms of flash cylinder economizer and plate exchange economizer, which is mainly based on considerations of energy efficiency and external dimensions. The system with flash cylinder intermediate air supply is generally driven by pressure difference (economizer pressure > impeller interstage pressure), and the saturated refrigerant vapor flows from the economizer into the compressor between the first and second impellers, increasing the cooling capacity and COP.

[0004] The design of the compressor is generally carried out at several points around the nominal operating conditions. The performance is better under the nominal operating conditions, but in actual operation, the operating conditions often change. As people's requirements for energy saving increase, they hope to achieve efficient operation in the entire range of operating conditions.

[0005] In summary, it is necessary to design an air-conditioning system that can improve the energy efficiency level under all working conditions and ensure reliability.

[0006] The above information disclosed in the background technology is only used to increase the understanding of the background technology of the present application, and therefore, it may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0007] In view of the problems pointed out in the background technology, the present invention provides a chiller and an air-conditioning system, which can use the pressure difference to replenish the saturated steam in the economizer into the compressor under various working conditions.

[0008] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions:

[0009] In some embodiments of the present application, a chiller is provided, comprising:

[0010] A compressor, the exhaust port of which is connected to the refrigerant inlet of the condenser;

[0011] An economizer, whose liquid inlet is connected to the refrigerant outlet of the condenser through a first pipeline; and the liquid discharge port of the economizer is connected to the inlet of the evaporator through a second pipeline;

[0012] The exhaust port of the evaporator is communicated with the air inlet of the compressor;

[0013] Among them, it also includes an ejector, which includes a first air inlet and a second air inlet; the first air inlet is connected to the exhaust port of the condenser; the second air inlet is connected to the exhaust port of the economizer through a third pipeline; the exhaust port of the ejector is connected to the air supply port of the compressor through a fourth pipeline.

[0014] In some embodiments of the present application,

[0015] The third pipeline is provided with a first electric valve; the fourth pipeline is provided with a second electric valve;

[0016] The chiller further includes a control module, which is used to control the opening degrees of the first electric valve and the second electric valve.

[0017] In some embodiments of the present application, a liquid level sensor is provided in the economizer for collecting liquid level data in the economizer;

[0018] The control module is also used to receive the liquid level data; a first liquid level threshold and a second liquid level threshold are arranged in the control module.

[0019] In some embodiments of the present application,

[0020] When the liquid level data is in a first range value, the first electric valve and the second electric valve are in an open state; the ejector ejects the gas in the economizer into the compressor; wherein the first range value is not higher than the first liquid level threshold.

[0021] In some embodiments of the present application,

[0022] When the liquid level data is in a second range value, the first electric valve and the second electric valve are in a closed state; the ejector stops ejecting the gas in the economizer into the compressor; wherein the second range value is not lower than a second liquid level threshold.

[0023] In some embodiments of the present application,

[0024] When the liquid level data is in a third range value, the openings of the first electric valve and the second electric valve remain unchanged, and the third range value is within the interval between the first liquid level threshold value and the second liquid level threshold value.

[0025] In some embodiments of the present application,

[0026] The economizer is a flash economizer, and a gas phase space and a liquid phase space are formed in the main body of the economizer, wherein the exhaust port of the economizer is communicated with the gas phase space, and the liquid inlet and the liquid outlet of the economizer are connected with the liquid phase space.

[0027] In some embodiments of the present application,

[0028] The economizer further comprises a liquid inlet flow regulating valve and a liquid discharge flow regulating valve; the liquid inlet flow regulating valve is arranged on the first pipeline, and the outlet of the liquid inlet flow regulating valve is connected to the liquid inlet of the economizer, and the inlet of the liquid inlet flow regulating valve is connected to the liquid refrigerant outlet of the condenser;

[0029] The discharge flow regulating valve is arranged on the second pipeline, and the inlet of the discharge flow regulating valve is connected with the discharge port of the economizer, and the outlet of the discharge flow regulating valve is connected with the liquid refrigerant inlet of the evaporator.

[0030] In some embodiments of the present application, a chiller is provided, comprising:

[0031] A compressor, the exhaust port of which is connected to the refrigerant inlet of the condenser;

[0032] An economizer, whose air inlet is connected to the refrigerant outlet of the condenser through a first pipeline; and whose liquid discharge port is connected to the inlet of the evaporator through a second pipeline;

[0033] The exhaust port of the evaporator is communicated with the air inlet of the compressor;

[0034] The invention also includes an ejector, wherein the ejector is connected to the first supplementary air flow path and the second supplementary air flow path.

[0035] The first supplementary gas flow path is used to introduce the gas in the condenser into the compressor; the second supplementary gas flow path is used to introduce the gas in the economizer into the compressor.

[0036] In some embodiments of the present application, an air conditioning system is provided, including: the above-mentioned chiller.

[0037] Compared with the prior art, the advantages and positive effects of the present invention are:

[0038] The present invention provides an ejector on the air supply pipeline of the chiller, omitting a separate power device, and utilizing the pressure difference to eject the saturated steam in the compressor to the intermediate pressure of the two-stage compression, thereby achieving performance improvement under all working conditions.

[0039] After reading the specific embodiments of the present invention in conjunction with the accompanying drawings, other features and advantages of the present invention will become more clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0041] Figure 1 It is a schematic diagram of the structural connection of a chiller in the prior art;

[0042] Figure 2 Schematic diagram of the structural connection of the chiller according to the embodiment Figure 1 ;

[0043] Figure 3 Schematic diagram of the structural connection of the chiller according to the embodiment Figure 2 ;

[0044] Figure 4 Schematic diagram of the refrigerant flow of the chiller according to the embodiment Figure 1 ;

[0045] Figure 5 Schematic diagram of the structural connection of the chiller according to the embodiment Figure 3 ;

[0046] Figure 6 Schematic diagram of the refrigerant flow of the chiller according to the embodiment Figure 2 ;

[0047] Figure 7 is a schematic structural diagram of the economizer according to an embodiment;

[0048] Figure 8 is a schematic structural diagram of the ejector according to an embodiment;

[0049] Fig. 9 Schematic diagram of communication connection of a control module according to an embodiment.

[0050] Reference numerals:

[0051] 100, compressor; 200, condenser; 300, economizer; 310, main body; 320, liquid inlet; 330, exhaust port; 340, liquid discharge port; 350, liquid level sensor; 400, evaporator; 500, ejector; 510, first air inlet; 520, second air inlet; 610, first electric valve; 620, second electric valve; 710, liquid inlet flow regulating valve; 720, liquid discharge flow regulating valve; 810, first pipeline; 820, second pipeline; 830, third pipeline; 840, fourth pipeline; 900, control module. DETAILED DESCRIPTION

[0052] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0053] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to 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.

[0054] 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. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0055] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0056] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0057] The disclosure below provides many different embodiments or examples to realize different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplicity and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0058] In this application, the air conditioning system includes an outdoor unit and an indoor unit, and the air conditioning system performs a refrigeration cycle of the air conditioner by using a compressor, a condenser, an expansion valve, and an evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation to cool or heat the indoor space.

[0059] The low-temperature and low-pressure refrigerant enters the compressor, which compresses it into high-temperature and high-pressure refrigerant gas and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and the heat is released to the surrounding environment through the condensation process.

[0060] The expansion valve expands the high-temperature and high-pressure liquid refrigerant condensed in the condenser into a low-pressure liquid refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the low-temperature and low-pressure refrigerant gas to the compressor. The evaporator can achieve a cooling effect by utilizing the latent heat of evaporation of the refrigerant to exchange heat with the material to be cooled. In the entire cycle, the air conditioner can adjust the temperature of the indoor space.

[0061] The outdoor unit of the air conditioner refers to a portion of a refrigeration cycle including a compressor and an outdoor heat exchanger, the indoor unit of the air conditioner includes an indoor heat exchanger, and an expansion valve may be provided in the indoor unit or the outdoor unit.

[0062] The indoor heat exchanger and the outdoor heat exchanger function as a condenser or an evaporator. When the indoor heat exchanger functions as a condenser, the air conditioner functions as a heater in a heating mode, and when the indoor heat exchanger functions as an evaporator, the air conditioner functions as a cooler in a cooling mode.

[0063] In the existing chiller involved in this embodiment, refer to Figure 1As shown, the compressor 100 used is a magnetic levitation centrifuge. During the operation of the magnetic levitation centrifuge, the high-temperature and high-pressure refrigerant gas discharged from the compressor 100 is condensed in the condenser 200 and then enters the economizer 300. In the economizer 300, a small part of the refrigerant flashes into saturated vapor and enters the air supply port between the two-stage impellers of the compressor 100. Most of the refrigerant liquid enters the evaporator 400 after throttling, evaporates into low-pressure vapor in the evaporator 400, and then enters the suction end of the compressor 100. After being compressed by the first-stage impeller, it is mixed with the refrigerant from the economizer 300 and compressed by the second-stage impeller, and the cycle repeats.

[0064] During the operation of the chiller, as the load and operating conditions change, the operating conditions of the two-stage compressor 100 will deviate from the design conditions, causing a pressure imbalance between the first-stage impeller and the second-stage impeller of the two-stage compressor 100, causing the chiller to deviate from the optimal operating point, resulting in reduced energy efficiency of the chiller.

[0065] In order to maintain high operating efficiency when the operating conditions change, refer to Figure 2-Figure 6 As shown, a chiller is provided, comprising:

[0066] The compressor 100, whose exhaust port 330 is connected to the refrigerant inlet of the condenser 200;

[0067] The economizer 300, whose liquid inlet 320 is connected to the refrigerant outlet of the condenser 200 through the first pipeline 810; the liquid discharge port 340 of the economizer 300 is connected to the inlet of the evaporator 400 through the second pipeline 820;

[0068] The exhaust port 330 of the evaporator 400 is in communication with the air inlet of the compressor 100;

[0069] Among them, it also includes an ejector 500, which includes a first air inlet 510 and a second air inlet 520; the first air inlet 510 is connected to the exhaust port 330 of the condenser 200; the second air inlet 520 is connected to the exhaust port 330 of the economizer 300 through a third pipeline 830; the exhaust port 330 of the ejector 500 is connected to the air supply port of the compressor 100 through a fourth pipeline 840.

[0070] In some embodiments of the present application, during the operation of the compressor 100, if the operating conditions change, there is a situation where the pressure between the stages of the compressor 100 is greater than the pressure inside the economizer 300, and the cooling capacity and COP cannot be improved; the ejector 500 added in this embodiment can effectively inject the gaseous refrigerant in the economizer 300 into the compressor 100 to complete the air replenishment.

[0071] In some embodiments of the present application, refer to Figure 8As shown, the compressor 100 flows the high-temperature and high-pressure gaseous refrigerant into the condenser 200. Specifically, there is still uncondensed gaseous refrigerant in the upper space of the condenser 200. Therefore, an exhaust port 330 is provided above the condenser 200. The first air inlet 510 of the ejector 500 can be connected to the exhaust port 330 of the condenser 200, which can help increase the air replenishment pressure of the ejector 500.

[0072] In some embodiments of the present application, in the economizer 300, a small portion of the liquid refrigerant flashes into saturated vapor and enters the second air inlet 520 of the ejector 500 through the exhaust port 330 of the economizer 300, thereby injecting the gaseous refrigerant in the economizer 300 into the air supply port between the two-stage impellers of the compressor 100 for air supply.

[0073] In some embodiments of the present application, refer to Figure 4 and Figure 5 As shown, in order to ensure the stability of the operation of the chiller, a first electric valve 610 is provided on the third pipeline 830; a second electric valve 620 is provided on the fourth pipeline 840;

[0074] The chiller further includes a control module 900 for controlling the openings of the first electric valve 610 and the second electric valve 620 .

[0075] In some embodiments of the present application, the opening change of the first electric valve 610 is used to adjust the intake flow from the economizer 300 to the ejector 500; the opening change of the second electric valve 620 is used to adjust the intake flow from the ejector 500 to the compressor 100.

[0076] In some embodiments of the present application, the control module 900 is in communication connection with the first electric valve 610 and the second electric valve 620 , and the control module 900 can send an opening or closing control instruction to the first electric valve 610 and the second electric valve 620 .

[0077] In some embodiments of the present application, refer to Fig. 9 As shown, the economizer 300 is provided with a liquid level sensor 350 for collecting liquid level data in the economizer 300;

[0078] The control module 900 is also used to receive the liquid level data; a first liquid level threshold and a second liquid level threshold are provided in the control module 900.

[0079] In some embodiments of the present application, the first liquid level threshold is less than the second liquid level threshold, and the second liquid level threshold serves as a warning value for stopping gas replenishment, that is, when the liquid level in the economizer 300 is higher than the second liquid level threshold, the liquid level in the economizer 300 is high, and there is a certain risk of liquid being carried in the air, and gas replenishment needs to be stopped.

[0080] In some embodiments of the present application, the liquid level data collected by the liquid level sensor 350 is real-time liquid level data in the economizer 300 .

[0081] In some embodiments of the present application, when the liquid level data is in a first range value, the control module 900 is used to send an opening instruction to the first electric valve 610 and the second electric valve 620; the ejector 500 ejects the gas in the economizer 300 into the compressor 100. The first range value is not higher than the first liquid level threshold.

[0082] In some embodiments of the present application, when the real-time liquid level data in the economizer 300 is not greater than the first liquid level threshold, the control module 900 controls both the first electric valve 610 and the second electric valve 620 to open for air replenishment.

[0083] In some embodiments of the present application, when the liquid level data is in a second range value, the control module 900 is used to send a closing instruction to the first electric valve 610 and the second electric valve 620; the ejector 500 stops ejecting the gas in the economizer 300 into the compressor 100; wherein the second range value is not lower than a second liquid level threshold.

[0084] In some embodiments of the present application, when the real-time liquid level data in the economizer 300 is not less than the second liquid level threshold, the control module 900 controls the first electric valve 610 and the second electric valve 620 to close, stop replenishing air, and prevent liquid refrigerant from entering the air replenishment port of the compressor 100.

[0085] In some embodiments of the present application, when the liquid level data is within a third range value, that is, when the liquid level data is within the interval between the first liquid level threshold and the second liquid level threshold, the openings of the first electric valve 610 and the second electric valve 620 remain unchanged.

[0086] In some embodiments of the present application, refer to Figure 7 As shown, the economizer 300 is a flash economizer 300, and a gas phase space and a liquid phase space are formed in the main body 310 of the economizer 300, wherein the exhaust port 330 of the economizer 300 is connected to the gas phase space, and the liquid inlet 320 and the liquid outlet 340 of the economizer 300 are connected to the liquid phase space.

[0087] In some embodiments of the present application, the flash economizer 300 includes an economizer 300 body 310, and the economizer 300 body 310 is provided with an economizer 300 liquid inlet 320, an economizer 300 gas outlet 330, and an economizer 300 liquid discharge outlet 340, and the economizer 300 liquid inlet 320, the economizer 300 gas outlet 330, and the economizer 300 liquid discharge outlet 340 are respectively connected to the economizer 300 body 310. Here, the arrangement positions of the economizer 300 liquid inlet 320, the economizer 300 gas outlet 330, and the economizer 300 liquid discharge outlet 340 are not specifically limited, as long as the economizer 300 liquid inlet 320, the economizer 300 gas outlet 330, and the economizer 300 liquid discharge outlet 340 are respectively connected to the economizer 300 body 310.

[0088] In some embodiments of the present application, refer to Figure 2 As shown, the liquid inlet 320 of the economizer 300 is used to communicate with the liquid refrigerant supply equipment so that the liquid refrigerant can be introduced into the main body 310 of the economizer 300; in the chiller, the chiller includes a condenser 200, and the condenser 200 is used to condense the gaseous refrigerant discharged from the two-stage compressor 100. The condenser 200 is provided with a liquid refrigerant outlet, and the liquid refrigerant condensed in the condenser 200 can be discharged through the liquid refrigerant outlet of the condenser 200; the liquid inlet 320 of the economizer 300 is connected with the liquid refrigerant outlet of the condenser 200, so that the liquid refrigerant in the condenser 200 can flow into the main body 310 of the economizer 300 through the pipeline connecting the liquid inlet 320 of the economizer 300 and the liquid refrigerant outlet of the condenser 200, so as to flash evaporate in the main body 310 of the economizer 300.

[0089] In some embodiments of the present application, after the refrigerant flashes in the economizer 300, liquid refrigerant with a certain liquid level height is formed below the main body 310 of the economizer 300, and gaseous refrigerant fills the gas phase space above the liquid refrigerant; the economizer 300 exhaust port 330 provided on the main body 310 of the economizer 300 is connected to the gas phase space in the main body 310 of the economizer 300, so that the gaseous refrigerant in the main body 310 of the economizer 300 can be discharged from the main body 310 of the economizer 300 through the exhaust port 330 of the economizer 300.

[0090] like Figure 3 and Figure 4 As shown, in the chiller, the gaseous refrigerant discharged from the main body 310 of the economizer 300 enters the ejector 500 through the third pipeline 830 .

[0091] In some embodiments of the present application, a drain port 340 of the economizer 300 is further disposed on the bottom wall of the economizer 300 body 310 , and the economizer 300 liquid inlet 320 and the economizer 300 drain port 340 are disposed at opposite sides of the economizer 300 body 310 in the length direction at a relative interval.

[0092] In some embodiments of the present application, in a chiller, the drain port 340 of the economizer 300 is used to communicate with the evaporator 400 of the chiller, and the liquid refrigerant in the main body 310 of the economizer 300 can be discharged into the evaporator 400 through the drain port 340 of the economizer 300. After evaporation in the evaporator 400, the liquid refrigerant becomes a gaseous refrigerant and is transported back to the air inlet of the two-stage compressor 100 to supply air to the two-stage compressor 100.

[0093] In some embodiments of the present application, refer to Figure 5 and Figure 6 As shown, the economizer 300 further includes a liquid inlet flow regulating valve 710 and a liquid discharge flow regulating valve 720; the liquid inlet flow regulating valve 710 is disposed at the liquid inlet 320 of the economizer 300, and the outlet of the liquid inlet flow regulating valve 710 is connected to the liquid inlet 320 of the economizer 300, and the inlet of the liquid inlet flow regulating valve 710 is connected to the liquid refrigerant outlet of the condenser 200;

[0094] The discharge flow regulating valve 720 is disposed at the discharge port 340 of the economizer 300 , and the inlet of the discharge flow regulating valve 720 is connected to the discharge port 340 of the economizer 300 , and the outlet of the discharge flow regulating valve 720 is connected to the liquid refrigerant inlet of the evaporator 400 .

[0095] In some embodiments of the present application, the liquid refrigerant in the condenser 200 needs to flow into the economizer 300 body 310 through the liquid inlet flow regulating valve 710; therefore, the opening of the liquid inlet flow regulating valve 710 can be controlled to control the feed flow of the liquid refrigerant in the economizer 300 body 310.

[0096] In some embodiments of the present application, the liquid refrigerant in the economizer 300 needs to flow into the evaporator 400 through the discharge flow regulating valve 720; therefore, the discharge flow rate of the liquid refrigerant of the main body 310 of the economizer 300 can be controlled by adjusting the opening of the discharge flow regulating valve 720.

[0097] In some embodiments of the present application, a chiller is provided, comprising:

[0098] The compressor 100, whose exhaust port 330 is connected to the refrigerant inlet of the condenser 200;

[0099] The economizer 300 has an air inlet connected to the refrigerant outlet of the condenser 200 through a first pipeline 810; the drain port 340 of the economizer 300 is connected to the inlet of the evaporator 400 through a second pipeline 820;

[0100] The exhaust port 330 of the evaporator 400 is in communication with the air inlet of the compressor 100;

[0101] The invention also includes an ejector 500, wherein the ejector 500 is connected to a first supplementary air flow path and a second supplementary air flow path.

[0102] The first supplementary gas flow path is used to inject the gas in the condenser 200 into the compressor 100 ; the second supplementary gas flow path is used to inject the gas in the economizer 300 into the compressor 100 .

[0103] In some embodiments of the present application, an air conditioning system is provided, including: the above-mentioned chiller.

[0104] In this embodiment, the air conditioning system includes a water chiller, so the air conditioning system has all the beneficial effects of the water chiller, which will not be described in detail here.

[0105] Compared with the prior art, the advantages and positive effects of the present invention are:

[0106] The present invention provides an ejector 500 on the air supply pipeline of the chiller, omitting a separate power device, and utilizing the pressure difference to eject the saturated steam in the compressor to the intermediate pressure of the two-stage compression, thereby improving the performance of all working conditions.

[0107] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0108] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. Chiller, including: compressor, Its exhaust port is connected to the refrigerant inlet of the condenser; An economizer, whose liquid inlet is connected to the refrigerant outlet of the condenser through a first pipeline; and the liquid discharge port of the economizer is connected to the inlet of the evaporator through a second pipeline; The exhaust port of the evaporator is communicated with the air inlet of the compressor; It is characterized in that it also includes an ejector, which includes a first air inlet and a second air inlet; the first air inlet is connected to the exhaust port of the condenser; the second air inlet is connected to the exhaust port of the economizer through a third pipeline; the exhaust port of the ejector is connected to the air supply port of the compressor through a fourth pipeline.

2. The chiller according to claim 1, characterized in that: The third pipeline is provided with a first electric valve; the fourth pipeline is provided with a second electric valve; The chiller further includes a control module, which is used to control the opening degrees of the first electric valve and the second electric valve.

3. The chiller according to claim 2, characterized in that: A liquid level sensor is provided in the economizer for collecting liquid level data in the economizer; The control module is also used to receive the liquid level data; a first liquid level threshold and a second liquid level threshold are arranged in the control module.

4. The chiller according to claim 3, characterized in that: When the liquid level data is in a first range value, the first electric valve and the second electric valve are in an open state; the ejector ejects the gas in the economizer into the compressor; wherein the first range value is not higher than the first liquid level threshold.

5. The chiller according to claim 3, characterized in that: When the liquid level data is in a second range value, the first electric valve and the second electric valve are in a closed state; the ejector stops ejecting the gas in the economizer into the compressor; wherein the second range value is not lower than a second liquid level threshold.

6. The water chiller according to claim 3, characterized in that: When the liquid level data is in a third range value, the openings of the first electric valve and the second electric valve remain unchanged; wherein the third range value is within the interval between the first liquid level threshold value and the second liquid level threshold value.

7. The water chiller according to claim 1, characterized in that: The economizer is a flash economizer, and a gas phase space and a liquid phase space are formed in the main body of the economizer, wherein the exhaust port of the economizer is communicated with the gas phase space, and the liquid inlet and the liquid outlet of the economizer are connected with the liquid phase space.

8. The chiller according to claim 1, characterized in that: The economizer further comprises a liquid inlet flow regulating valve and a liquid discharge flow regulating valve; the liquid inlet flow regulating valve is arranged on the first pipeline, and the outlet of the liquid inlet flow regulating valve is connected to the liquid inlet of the economizer, and the inlet of the liquid inlet flow regulating valve is connected to the liquid refrigerant outlet of the condenser; The discharge flow regulating valve is arranged on the second pipeline, and the inlet of the discharge flow regulating valve is connected with the discharge port of the economizer, and the outlet of the discharge flow regulating valve is connected with the liquid refrigerant inlet of the evaporator.

9. Chiller, including: compressor, Its exhaust port is connected to the refrigerant inlet of the condenser; An economizer, whose air inlet is connected to the refrigerant outlet of the condenser through a first pipeline; and whose liquid discharge port is connected to the inlet of the evaporator through a second pipeline; The exhaust port of the evaporator is communicated with the air inlet of the compressor; It is characterized in that it also includes an ejector, wherein the ejector is connected to the first supplementary air flow path and the second supplementary air flow path, The first supplementary gas flow path is used to introduce the gas in the condenser into the compressor; the second supplementary gas flow path is used to introduce the gas in the economizer into the compressor.

10. An air conditioning system, characterized in that include: A chiller according to any one of claims 1 to 9.

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