Evaporator condensate water recycling system, control method and air conditioner

Abstract

The application provides an evaporator condensate water recycling system, a control method and an air conditioner. The system comprises a condensate water recycling container for receiving condensate water generated by an evaporator; a system heat exchanger which is coupled to a first component to be condensed in heat exchange mode, and a water outlet of the condensate water recycling container is in communication with an inlet of the system heat exchanger; an absorber which is in communication with an outlet of the system heat exchanger; a generator which is in communication with the absorber, and an absorbent working medium solution in the absorber can enter the generator under the pumping action of a water pump, and after throttling at a first throttling device, the absorbent working medium solution flows back to the absorber; and a second component for heating the absorbent working medium solution in the generator so that water in the absorbent working medium solution is discharged from the generator in a gaseous state. The application realizes efficient utilization of the condensate water cooling capacity and finally discharges to the external environment in a gaseous state, without causing pollution to the external environment.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of air conditioning, and particularly relates to an evaporator condensate water recycling system, a control method and an air conditioner. BACKGROUND

[0002] The water temperature of air conditioner condensate water is generally 10-15℃, which contains a large amount of cold energy. At present, the treatment methods of condensate water are divided into direct discharge and recycling. Direct discharge is a waste of cold energy and causes environmental pollution. Recycling mainly collects condensate water and sends it to the outdoor unit to enhance the heat dissipation of the condenser. Common methods include soaking the U-tube in condensate water and spraying condensate water on the condenser through a perforated or slotted copper pipe. The system structure of these methods is relatively simple, but the cooling effect is limited, and the utilization degree of condensate water is low. SUMMARY

[0003] Therefore, the present application provides an evaporator condensate water recycling system, a control method and an air conditioner, which can solve the technical problems of limited cooling effect and low utilization degree of condensate water in the prior art.

[0004] To solve the above problems, the present application provides an evaporator condensate water recycling system, comprising:

[0005] A condensate water recovery container for receiving condensate water generated by an evaporator;

[0006] A system heat exchanger coupled to a first component to be condensed, and a water outlet of the condensate water recovery container is in communication with an inlet of the system heat exchanger;

[0007] An absorber in communication with an outlet of the system heat exchanger;

[0008] A generator in communication with the absorber, and an absorbent working fluid solution in the absorber can enter the generator under the pumping action of a water pump and return to the absorber after throttling at a first throttling device;

[0009] A second component for heating the absorbent working fluid solution in the generator to enable water in the absorbent working fluid solution to be discharged from the generator in a gaseous state.

[0010] In some embodiments,

[0011] The water outlet of the condensate water recovery container is in communication with the inlet of the system heat exchanger via a second throttling device, and the second throttling device can throttle the condensate water in liquid phase flowing out of the water outlet into a gas-liquid two-phase.

[0012] In some embodiments,

[0013] The generator has an exhaust port, and a vacuum pump is arranged at the exhaust port.

[0014] In some embodiments,

[0015] A spray is arranged at the end of the outflow pipeline of the first throttling device, and the spray is arranged in the absorber.

[0016] In some embodiments,

[0017] The absorbent working solution is a LiI solution.

[0018] In some embodiments,

[0019] The first component is a supercooling pipe, which is detachably connected to the refrigerant outlet of the condenser of an air conditioner.

[0020] In some embodiments,

[0021] The second component is a heat exchange pipe, which is arranged in the generator and immersed in the absorbent working solution of the generator.

[0022] In some embodiments,

[0023] The second component is connected in series between the exhaust port of a compressor and the refrigerant inlet of a condenser in an air conditioner.

[0024] The application also provides a control method of the evaporator condensate water recycling system as described above, which comprises the following steps:

[0025] Judging whether the condensate water level in the condensate water recycling container is higher than a set level;

[0026] If the condensate water level is higher than the set level, controlling the second throttling device to open to throttle the condensate water flowing therethrough to form a gas-liquid two-phase flow;

[0027] Judging whether the liquid level of the absorbent working solution in the absorber is higher than a set liquid level;

[0028] If the liquid level of the absorbent working solution is higher than the set liquid level, controlling the water pump and the first throttling device to open.

[0029] In some embodiments,

[0030] When the evaporator condensate water recycling system comprises a vacuum pump,

[0031] Controlling the water pump and the first throttling device to open while also controlling the vacuum pump to open.

[0032] The application further provides an air conditioner comprising the evaporator condensate water recycling system.

[0033] The application provides an evaporator condensate water recycling system, a control method and an air conditioner, which have the following beneficial effects:

[0034] The evaporator condensate water recycling system adopts the absorption refrigeration principle, can utilize the cold energy of the condensate water generated by the evaporator to form efficient cooling of the first component to be condensed, and can utilize the characteristic that the boiling point of the absorption working solution is much higher than that of water to make the condensate water be discharged in a gaseous state under the heating action of the second component, so that the condensate water is finally discharged to the external environment in a gaseous state, without causing pollution to the external environment and without forming adverse corrosion to the corresponding condensing component.

[0035] The second component is connected between the exhaust port of the compressor and the refrigerant inlet of the condenser in the air conditioner, so that the high-temperature refrigerant discharged by the compressor can be used to heat the absorption working solution in the generator, the refrigerant can be pre-cooled before entering the subsequent condenser of the air conditioner, the working performance of the air conditioner is improved, the condensate water dissolved in the absorption working solution is evaporated into water vapor and discharged, the structure design is simplified, and the cold energy of the condensate water is objectively utilized twice in the generator.

[0036] The condensate water flowing out of the condensate water recycling container is throttled and depressurized by the second throttling device to form gaseous-liquid two-phase condensate water before entering the system heat exchanger, the gaseous-liquid two-phase condensate water is beneficial to the improvement of the heat exchange efficiency between the condensate water and the first component and the improvement of the cooling effect of the first component, and the depressurized condensate water is beneficial to the pressure difference in the system, which is beneficial to the circulation of the absorption working solution in the system.

[0037] The operation of the vacuum pump can adjust the pressure in the generator (form a low-pressure environment with a certain vacuum degree, where the low-pressure environment refers to a pressure lower than the external atmospheric pressure), the formation of the low-pressure environment is beneficial to reducing the corrosion of the absorption working solution to the components in contact with the absorption working solution, and also reduces the boiling point of the corresponding water, which is beneficial to the smoother evaporation of the water in the absorption working solution.

[0038] The subcooling pipe arranged independently of the condenser is in communication with the refrigerant flowing out of the condenser and is also in the system heat exchanger of the application, so as to form heat exchange with the corresponding heat exchange pipe section in the system heat exchanger, such a design can make the system of the application have a wider application scenario, that is, the subcooling pipe in the application is detachably assembled in the corresponding air conditioner, which is simple and convenient to operate. BRIEF DESCRIPTION OF DRAWINGS

[0039] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings required in the embodiments or prior art description. Obviously, the drawings in the following description are only exemplary, and for those skilled in the art, other drawings can be obtained from the provided drawings without creative labor.

[0040] The structures, proportions, sizes, etc. shown in the specification are only used to cooperate with the content disclosed in the specification, for understanding and reading by those skilled in the art, and are not used to limit the conditions that the present application can be implemented, so they do not have technical significance. Any modification of structure, change of proportion relationship or adjustment of size, without affecting the effects and purposes that the present application can produce, should still fall within the scope of the technical content disclosed by the present application.

[0041] Figure 1 The system principle diagram of the evaporator condensate water recycling system of the embodiment of the present application;

[0042] Figure 2 The control logic schematic diagram of the control method of the evaporator condensate water recycling system of the embodiment of the present application.

[0043] The reference signs are represented as:

[0044] 1, condensate water recovery container;

[0045] 2, system heat exchanger;

[0046] 3, absorber;

[0047] 4, generator;

[0048] 5, water pump;

[0049] 61, first throttling device; 62, second throttling device;

[0050] 8, vacuum pump;

[0051] 9, spray;

[0052] 101, subcooling pipe; 102, condenser; 103, heat exchange pipe; 104, compressor. DETAILED DESCRIPTION

[0053] Clearly, only the embodiments described are merely a part of the embodiments of the present application, rather than all the embodiments. The description of the at least one example embodiment is merely illustrative in nature and is in no way limiting to the application and its applications or uses. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts should fall within the scope of the present application.

[0054] It should be noted that the terms used herein are merely for describing specific embodiments, and are not intended to limit the example embodiments according to the present application. As used herein, the singular forms are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the terms "comprise" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, devices, components and / or combinations thereof, but do not preclude the presence or addition of one or more other features, steps, operations, devices, components and / or combinations thereof.

[0055] It should be understood that the term "and / or" used herein merely describes an association relationship of associated objects, and means that there can be three relationships, for example, A and / or B, which means that there are three cases of A alone, A and B together, and B alone. In addition, the character " / " herein generally represents an "or" relationship between the front and rear associated objects.

[0056] Unless specifically stated otherwise, the relative arrangements of the components and steps illustrated in these embodiments and the numerical expressions and values set forth herein are not limiting to the scope of the present application. It should be understood that the dimensions of the various parts shown in the drawings are not necessarily to scale. The techniques, methods, and devices known to those of ordinary skill in the relevant art can not be discussed in detail, but should be considered as part of the description of the application. In all examples shown and discussed herein, any specific value should be interpreted as merely illustrative, and not as a limitation. Therefore, other examples of the example embodiments can have different values. It should be noted that similar reference numbers and letters represent similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0057] In the description of the present application, it needs to be understood that the orientation words such as "front, back, up, down, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the like indicated orientation or position relationship is generally based on the orientation or position relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, without making the opposite statement, these orientation words do not indicate and imply that the device or element referred to must have a particular orientation or be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the scope of protection of the present application; the orientation words "inner, outer" refer to the inner and outer relative to the contour of each component itself.

[0058] For the convenience of description, spatial relative terms such as "over", "above", "upper surface", "upper" and the like can be used herein to describe the spatial position relationship of one device or feature with other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device described in the drawings. For example, if the device in the drawing is inverted, the device described as "above" or "over" other devices or structures will be positioned "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below" orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein are interpreted accordingly.

[0059] In addition, it needs to be noted that the use of "first", "second" and the like to define parts is only for the convenience of distinguishing the corresponding parts, and the above words have no special meaning unless otherwise stated, therefore cannot be understood as a limitation on the scope of protection of the present application.

[0060] For reference Figure 1 and Figure 2 According to the embodiments of the present application, as shown in Figure 1 A condenser condensate recycling system is provided, comprising:

[0061] A condensate recycling container 1, which can be specifically configured as a sink, is used to receive the condensate generated by the evaporator. In a preferred embodiment, the sink is arranged in the lower area of the evaporator to collect the condensate falling under the action of gravity during the operation of the evaporator.

[0062] The system heat exchanger 2 is coupled in heat exchange with a first component (not shown in the figure) to be condensed, and the water outlet of the condensate water recovery container 1 is in communication with the inlet of the system heat exchanger 2, and the heat exchange coupling between the first component and the heat exchange pipe in the system heat exchanger 2 realizes heat conduction between the two, so as to realize the cooling and heat dissipation purpose of the condensate water in the system heat exchanger 2 to the first component;

[0063] The absorber 3 is in communication with the outlet of the system heat exchanger 2, and has an absorbent working solution therein to absorb the condensate water (gas-liquid two-phase or liquid phase) flowing out of the system heat exchanger 2.

[0064] The generator 4 is in communication with the absorber 3, and the absorbent working solution in the absorber 3 can enter the generator 4 under the pumping action of the water pump 5, and then return to the absorber 3 after throttling at the first throttling device 61, that is, the water pump 5 can drive the absorbent working solution in the system to circulate in the absorber 3 and the generator 4.

[0065] A second component (not shown in the figure) is used to heat the absorbent working solution in the generator 4, so that the water in the absorbent working solution is discharged from the generator 4 in a gaseous state. In order to ensure the discharge of gaseous water (i.e. water vapor) from the generator 4, it can be understood that the generator 4 is provided with a corresponding exhaust port (not shown in the figure).

[0066] The evaporator condensate water recovery system in the technical solution adopts the principle of absorbent refrigeration, can utilize the cold energy of the condensate water generated by the evaporator to form high-efficiency cooling to the first component to be condensed, and at the same time, utilizes the characteristic that the boiling point of the absorbent working solution is much higher than that of water, so that the condensate water is discharged in a gaseous state under the heating action of the second component, realizes high-efficiency utilization of the cold energy of the condensate water, and finally discharges to the external environment in a gaseous state, without causing pollution to the external environment, and without forming adverse corrosion to the corresponding condensing component.

[0067] Generally, the absorbent working solution can be LiBr aqueous solution, LiI aqueous solution, etc., and the boiling points of the working substances LiBr and LiI are much higher than that of water, and have strong moisture absorption capacity, so that the water vapor generated by heat exchange can be well absorbed, and thus the water can be discharged to the external environment in a gaseous state when the second component is heated, and these working substances will not enter the external environment, so as not to cause pollution to the external environment.

[0068] In a preferred embodiment, the second component is a heat exchange pipe 103, which is located in the generator 4 and immersed in the absorbent working solution in the generator 4.

[0069] In the technical solution, the heat exchange pipe 103 directly contacts with the absorbent working solution to heat the absorbent working solution, which has high heat conduction efficiency and prevents heat conduction loss caused by other indirect heating methods.

[0070] The heat exchange pipe 103 specifically includes a plurality of U-shaped pipes connected in series.

[0071] In one specific embodiment, the evaporator condensate recycling system of the present application is applied to an air conditioner. Correspondingly, the second component is connected in series between the exhaust port of the compressor 104 and the refrigerant inlet of the condenser 102 in the air conditioner, so that the high-temperature refrigerant discharged from the compressor 104 can be used to heat the absorbent working solution in the generator 4, and the refrigerant can be pre-cooled before entering the subsequent condenser 102 of the air conditioner. The working performance of the air conditioner is improved, the condensate dissolved in the absorbent working solution is evaporated into water vapor and discharged, the structure is simplified, and the cold energy of the condensate is objectively utilized in the generator 4.

[0072] Generally, the refrigerant temperature at the exhaust port of a general household air conditioner compressor is about 70-100°C. Based on this phenomenon, the absorbent working solution is preferably a LiI solution. Compared with a LiBr aqueous solution, the LiI aqueous solution is more suitable for using a low-temperature (70-100°C) heat source and has less corrosion.

[0073] In a more preferred embodiment, the water outlet of the condensate recycling container 1 is connected to the inlet of the system heat exchanger 2 through a second throttling device 62. The second throttling device 62 can throttle the liquid-phase condensate flowing out of the water outlet into gas-liquid two-phase condensate. The first and second throttling devices 61 and 62 can both be electronic expansion valves, which facilitates the control and adjustment of the two throttling devices.

[0074] In the technical solution, the condensate flowing out of the condensate recycling container 1 is throttled and depressurized by the second throttling device 62 to form gas-liquid two-phase condensate before entering the system heat exchanger 2. The gas-liquid two-phase condensate is beneficial to the improvement of the heat exchange efficiency between the condensate and the first component, which improves the cooling effect on the first component. On the other hand, the depressurized condensate is beneficial to the formation of pressure difference in the system, which is conducive to the circulation of the absorbent working solution in the system.

[0075] As mentioned above, the generator 4 has an exhaust port to facilitate the condensate water in the system to be smoothly discharged to the outside environment in the form of water vapor, at this time, as a preferred embodiment, a vacuum pump 8 is arranged at the exhaust port, through the operation of the vacuum pump 8, the pressure in the generator 4 can be adjusted (a low pressure environment with a certain vacuum degree is formed, at this time, the low pressure environment refers to lower than the external atmospheric pressure), forming a low pressure environment is conducive to reducing the corrosion of the absorbing working medium to the parts in contact with it, also reduces the boiling point of the corresponding water, and is conducive to the more smooth evaporation of water in the absorbing working medium solution.

[0076] The first component mentioned above can be, for example, a condenser 102 in an air conditioner, so as to achieve the purpose of cooling the condenser 102 by using the cold of the condensate water, at this time, the condenser 102 needs to be improved accordingly to be able to match the first component to form a better heat conduction effect, in a preferred embodiment, the first component is a supercooling pipe 101, which is detachably connected to the refrigerant outlet of the condenser 102 of the air conditioner, that is, the supercooling pipe 101 arranged independently of the condenser 102 is in communication with the outflowing refrigerant of the condenser 102 on the one hand, and is in the system heat exchanger 2 of the application on the other hand, so as to form heat exchange with the corresponding heat exchange pipe section in the system heat exchanger 2, such design can make the system of the application have more extensive application scenarios, that is, the supercooling pipe 101 in the application is detachably assembled in the corresponding air conditioner, which is simple and convenient to operate.

[0077] Continuing to refer to Figure 1 As shown, in some embodiments, a spraying member 9 is arranged at the end of the outflow pipeline of the first throttling device 61, and the spraying member 9 is in the absorber 3, the throttled absorbing working medium solution flows back to the absorber 3 in the form of spraying, which is conducive to the rapid absorption of the condensate water entering the absorber 3 by the water-absorbing working medium solution, thereby improving the refrigeration efficiency of the system.

[0078] According to the embodiments of the application, a control method of the evaporator condensate water recycling system is also provided, which comprises the following steps:

[0079] Judging whether the condensate water level in the condensate water recycling container 1 is higher than the set water level, specifically, a corresponding liquid level sensor is arranged in the condensate water recycling container 1, and the real-time water level of the condensate water in the condensate water recycling container 1 is detected by the liquid level sensor;

[0080] If the condensate water level is higher than the set water level, the second throttling device 62 (that is, the electronic expansion valve in the Figure 2 forms gas-liquid two-phase by throttling the condensate water flowing therethrough;

[0081] Judge whether the liquid level of the absorbent working solution in the absorber 3 is higher than the set liquid level, and the liquid level sensor is arranged in the absorber 3 to detect the real-time liquid level of the absorbent working solution in the absorber 3.

[0082] If the liquid level of the absorbent working solution is higher than the set liquid level, the water pump 5 and the first throttling device 61 are controlled to be opened. Figure 2

[0083] In the technical scheme, the system is controlled to operate when the condenser water is large, so that the reliable and stable operation of the system is ensured. The evaporator condenser water recycling system adopts the absorption refrigeration principle, can utilize the cold quantity of the condenser water generated by the evaporator to form efficient cooling of the first component to be condensed, and utilize the characteristic that the boiling point of the absorbent working solution is much higher than the boiling point of water to make the condenser water be discharged in the gaseous state under the heating of the second component. In this way, the efficient utilization of the cold quantity of the condenser water is realized, the condenser water is finally discharged to the external environment in the gaseous state, no pollution is caused to the external environment, and no adverse corrosion is formed on the corresponding condensing component.

[0084] When the evaporator condenser water recycling system comprises a vacuum pump 8, the water pump 5 and the first throttling device 61 are controlled to be opened, and the vacuum pump 8 is also controlled to be opened to adjust the vacuum degree in the generator 4, so that the water in the absorbent working solution is smoothly evaporated, and the refrigeration effect of the system is improved.

[0085] According to the embodiment of the present application, an air conditioner is also provided, which comprises the above-mentioned evaporator condenser water recycling system. Specifically, the air conditioner comprises an indoor heat exchanger, an outdoor heat exchanger, a compressor and a throttling element, and the indoor heat exchanger, the outdoor heat exchanger, the compressor and the throttling element are connected in a refrigerant circulation. The indoor heat exchanger is the evaporator as described above, and the outdoor heat exchanger is the condenser as described above.

[0086] Due to the adoption of the evaporator condenser water recycling system, the evaporator condenser water recycling system adopts the absorption refrigeration principle, can utilize the cold quantity of the condenser water generated by the evaporator to form efficient cooling of the first component to be condensed, and utilize the characteristic that the boiling point of the absorbent working solution is much higher than the boiling point of water to make the condenser water be discharged in the gaseous state under the heating of the second component. In this way, the efficient utilization of the cold quantity of the condenser water is realized, the condenser water is finally discharged to the external environment in the gaseous state, no pollution is caused to the external environment, and no adverse corrosion is formed on the corresponding condensing component.

[0087] ​The above merely describes preferred embodiments of the present application and is not used to limit the present application, and any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application. The above merely describes preferred embodiments of the present application and is not used to limit the present application, and any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An evaporator condensate recovery and utilization system, characterized in that, include: Condensate recovery container (1) is used to collect condensate generated by the evaporator; The system heat exchanger (2) is heat exchange coupled to the first component to be condensed, and the outlet of the condensate recovery container (1) can be connected to the inlet of the system heat exchanger (2). Absorber (3) is connected to the outlet of the system heat exchanger (2); The generator (4) is connected to the absorber (3). The absorbent working fluid solution in the absorber (3) can enter the generator (4) under the pumping action of the water pump (5) and flow back to the absorber (3) after being throttled at the first throttling device (61). The second component is used to heat the absorbent working solution in the generator (4) so ​​that the water in the absorbent working solution is discharged from the generator (4) in a gaseous state.

2. The evaporator condensate recovery and utilization system according to claim 1, characterized in that, The outlet of the condensate recovery container (1) is connected to the inlet of the system heat exchanger (2) via a second throttling device (62). The second throttling device (62) can throttle the liquid condensate flowing out of the outlet into a gas-liquid two-phase flow.

3. The evaporator condensate recovery and utilization system according to claim 1 or 2, characterized in that, The generator (4) has an exhaust port, and a vacuum pump (8) is provided at the exhaust port.

4. The evaporator condensate recovery and utilization system according to claim 1, characterized in that, A spray element (9) is provided at the end of the outlet pipe of the first throttling device (61), and the spray element (9) is located inside the absorber (3).

5. The evaporator condensate recovery and utilization system according to claim 1, characterized in that, The absorbent working fluid solution is a LiI solution.

6. The evaporator condensate recovery and utilization system according to claim 1, characterized in that, The first component is a subcooling pipe (101), which is detachably connected to the refrigerant outlet of the condenser (102) of the air conditioner.

7. The evaporator condensate recovery and utilization system according to claim 1, characterized in that, The second component is a heat exchange tube (103), which is located inside the generator (4) and immersed in the absorbent working fluid solution of the generator (4).

8. The evaporator condensate recovery and utilization system according to claim 7, characterized in that, The second component is connected in series between the exhaust port of the compressor (104) and the refrigerant inlet of the condenser (102) in the air conditioner.

9. A control method for an evaporator condensate recovery and utilization system as described in any one of claims 2 to 8, characterized in that, Includes the following steps: Determine whether the condensate water level in the condensate recovery container (1) is higher than the set water level; If the condensate water level is higher than the set water level, the second throttling device (62) is opened to throttle the condensate water flowing through it to form a gas-liquid two-phase flow. Determine whether the liquid level of the absorbent working fluid solution in the absorber (3) is higher than the set liquid level; If the liquid level of the absorbent working fluid solution is higher than the set liquid level, the water pump (5) and the first throttling device (61) are turned on.

10. The control method for the evaporator condensate recovery and utilization system according to claim 9, characterized in that, When the evaporator condensate recovery system includes a vacuum pump (8), While controlling the water pump (5) and the first throttling device (61) to start, the vacuum pump (8) is also controlled to start.

11. An air conditioner, characterized in that, The system includes the evaporator condensate recovery and utilization system as described in any one of claims 1 to 8.

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