Air-cooled chiller unit

Abstract

An air-cooled chiller unit comprises a water inlet pipeline; a water outlet pipeline; a cooling device; a heating device; wherein the cooling device and the heating device are connected in series between the water inlet pipeline and the water outlet pipeline through a pipeline, when water flowing in from the water inlet pipeline flows through the cooling device, the cooling device cools the water, when the water flows through the heating device, the heating device heats the water, and when the water flows through the water outlet pipeline, the cooling device cools the water. And finally, the water flows out from the water outlet pipeline. And by arranging the heating device, the temperature of the water can be increased. Therefore, when the water cooling requirement of a user is within the lowest operation range of the cooling device, even if the cooling device cools the water with the lowest load and the temperature of the water is still too low, the water can be heated by the heating device, so that the water reaches the target temperature. Therefore, the adaptation range of the cold using requirement can be widened, and the start-stop frequency of the air-cooled chiller unit is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of air-conditioning equipment, in particular to an air-cooled chiller. Background Art

[0002] At present, air-cooled chillers mainly provide users with cold water needs, especially in the field of industrial production. Air-cooled chillers can provide the chilled water needed for industrial production. However, it is not perfect. There are still many factors in the current technology that affect its long-term use. For example, when the user's air conditioning cooling demand fluctuates greatly and requires a stepless adjustment range of 0 to 100% of energy regulation, how to make the air-cooled chiller run continuously without stopping is one of them.

[0003] The operating range of the compressor of a conventional air-cooled chiller is 25% to 100%, and the operating range of a dual compressor can only reach 12.5% ​​to 100%. When the load is lower than 12.5% ​​or even 0% (i.e., the inlet water temperature is the same as the outlet water temperature), the air-cooled chiller needs to be shut down to ensure that the outlet water temperature of the chilled water does not drop any more. When the load demand rises to, for example, above 12.5%, the air-cooled chiller needs to be started to ensure that the outlet water temperature of the chilled water drops to the target temperature. However, it takes a certain amount of time to start the air-cooled chiller again, and the general time interval is at least 3 minutes. When the unit is restarted and the minimum load is greater than the load required by the user, for example, when the required load is 5%, the unit still needs to be shut down again. Then the reciprocating cycle, the frequent start and stop of the air-cooled chiller, is not only easy to cause the unit to have operating failures, but also cannot guarantee the user's constant water temperature requirements.

[0004] Therefore, there is an urgent need for an air-cooled chiller that can improve the adaptability range of cooling demand and reduce the start-stop frequency of the air-cooled chiller. Utility Model Content

[0005] In view of the above problems in the prior art, the present application provides an air-cooled chiller, which can improve the adaptation range of cooling demand and reduce the start-stop frequency of the air-cooled chiller.

[0006] The present application provides an air-cooled chiller, comprising: a water inlet pipe; a water outlet pipe; a cooling device; a heating device; wherein the cooling device and the heating device are connected in series between the water inlet pipe and the water outlet pipe through a pipe, and the water flowing in from the water inlet pipe is cooled by the cooling device when flowing through the cooling device, and is heated by the heating device when flowing through the heating device, and finally the water flows out from the water outlet pipe.

[0007] With the above structure, the water can be heated by setting a heating device. Therefore, when the user's cooling demand for water is below the minimum operating range of the cooling device, so that even if the cooling device cools the water at the minimum load, the water temperature is still too low, the heating device can heat the water to reach the target temperature. In this way, the adaptation range of the cooling demand can be increased and the start-stop frequency of the air-cooled chiller can be reduced.

[0008] In some embodiments, the water inlet of the heating device is connected to the water inlet pipe; the cooling device includes: an evaporator, the water inlet of the evaporator is connected to the water outlet pipe of the heating device, and the water outlet of the evaporator is connected to the water outlet pipe.

[0009] By adopting the above structure, by connecting the water inlet of the evaporator with the water outlet pipe of the heating device, when the user's demand for cooling the water is too small, the water can be heated by the heating device first, so that the cooling device can be operated at a lower load so that the water can reach a predetermined temperature after being cooled by the cooling device. In addition, since the cooling device has a higher adjustment accuracy for the water temperature than the heating device, by first heating the water by the heating device and then cooling the water by the cooling device, the accuracy of the water temperature when the water reaches the outlet pipe can be improved. At the same time, if the temperature of the water is too low, ice may appear, thereby blocking the pipe. By first heating the water by the heating device and then cooling the water by the cooling device, the problem of ice blocking the pipe due to too low water temperature when the water is first cooled by the cooling device can be avoided. In this way, the stability of the operation of the air-cooled chiller and the adaptation range of the air-cooled chiller for adjusting the water temperature can be improved.

[0010] In some embodiments, the water outlet of the heating device is connected to the water outlet pipe; the water outlet of the evaporator is connected to the water inlet pipe of the heating device, and the water inlet of the evaporator is connected to the water inlet pipe.

[0011] With the above structure, the water can be cooled by the cooling device first and then heated by the heating device, thereby improving the flexibility of the equipment and reducing the difficulty of design.

[0012] In some embodiments, the temperature increasing device includes a heat exchanger, and the temperature reducing device also includes a compressor. The heat exchanger and the compressor have a liquid inlet and a liquid outlet for circulating coolant. The liquid outlet of the compressor is connected to the liquid inlet pipe of the heat exchanger to transport coolant to the heat exchanger.

[0013] With the above structure, the compressor of the cooling device can be reused to provide coolant to the heat exchanger of the heating device, so that the coolant exchanges heat with water in the heat exchanger to increase the temperature of the water. In this way, the number of compressors can be reduced and the equipment cost can be reduced.

[0014] In some embodiments, the heat exchanger is a plate heat exchanger or a shell and tube heat exchanger.

[0015] By adopting the above structure, a suitable type of heat exchanger can be selected according to needs, thereby improving the flexibility of the equipment and reducing the difficulty of design.

[0016] In some embodiments, the temperature increasing device further includes: an electric valve, which is disposed on a pipeline between a liquid outlet of the compressor and a liquid inlet of the heat exchanger.

[0017] By adopting the above structure, an electric valve is set on the pipeline between the liquid outlet of the compressor and the liquid inlet of the heat exchanger, so that the connection and closing of the pipeline between the liquid outlet of the compressor and the liquid inlet of the heat exchanger can be controlled. Therefore, when the heat exchanger is needed to heat the water, the pipeline between the liquid outlet of the compressor and the liquid inlet of the heat exchanger can be opened by the electric valve, so that the coolant output by the compressor can flow into the heat exchanger to heat the water. When the heat exchanger is not needed to heat the water, the pipeline between the liquid outlet of the compressor and the liquid inlet of the heat exchanger can be closed by the electric valve to prevent the coolant output by the compressor from flowing into the heat exchanger and affecting the water temperature.

[0018] In some embodiments, the electric valve is a solenoid valve or an electric ball valve.

[0019] In some embodiments, the cooling device also includes a condenser, an economizer, and an expansion valve, the condenser, the economizer, and the expansion valve having a liquid inlet and a liquid outlet for circulation of the coolant, and the liquid inlet and liquid outlet of the compressor, the condenser, the economizer, the expansion valve, and the evaporator are connected end to end in sequence through pipes to form a ring.

[0020] In some embodiments, the liquid outlet of the heat exchanger is connected to the liquid inlet pipeline of the expansion valve.

[0021] With the above structure, by connecting the outlet of the heat exchanger with the inlet pipe of the expansion valve, the coolant completes heat exchange with water in the heat exchanger and the temperature is lowered, and then enters the evaporator through the expansion valve to cool the water, thereby realizing the secondary use of the coolant. In this way, the utilization efficiency of the coolant can be improved.

[0022] In some embodiments, the cooling device further includes: a three-way valve having three interfaces respectively connected to the liquid outlet of the economizer, the liquid outlet of the heat exchanger and the liquid inlet pipeline of the expansion valve.

[0023] In some embodiments, the three-way valve is an electric three-way valve, or a three-way valve composed of two electric ball valves.

[0024] With the above structure, the three-way valve can be used to control whether the liquid outlet of the heat exchanger is connected to the liquid inlet of the expansion valve. Therefore, when the heating device needs to work, the liquid outlet of the heat exchanger can be controlled to be connected to the liquid inlet of the expansion valve, so that the coolant that has completed the heat exchange in the heat exchanger can flow to the expansion valve and the evaporator. It is also possible to control the liquid outlet of the heat exchanger to be disconnected from the liquid inlet of the expansion valve when the heating device does not need to work, so as to avoid affecting the operation of the cooling device.

[0025] These and other aspects of the present invention will become more apparent from the following description of the embodiment(s). BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The following further illustrates the various features of the present invention and the relationship between the various features with reference to the accompanying drawings. The accompanying drawings are all exemplary, and some features are not shown in actual proportion. Some drawings may omit the features that are conventional in the field involved in the present application and are not necessary for the present application, or additionally show features that are not necessary for the present application. The combination of the various features shown in the accompanying drawings is not intended to limit the present application. In addition, throughout this specification, the same figure numerals refer to the same content. The specific description of the drawings is as follows:

[0027] Figure 1 This is a schematic diagram of the connection structure of the air-cooled chiller in this application.

[0028] Description of Reference Numerals

[0029] 10 air-cooled chiller; 100 cooling device; 110 evaporator; 120 compressor; 130 condenser; 140 filter drier; 150 sight glass; 160 economizer; 170 expansion valve; 180 three-way valve; 200 heating device; 210 heat exchanger; 220 electric valve. DETAILED DESCRIPTION

[0030] The term "comprising" as used in the description and claims should not be interpreted as being limited to what is listed thereafter; it does not exclude other elements. It should therefore be interpreted as specifying the presence of the features, integers or components mentioned, but does not exclude the presence or addition of one or more other features, integers or components and groups thereof. Thus, the expression "a device comprising means A and B" should not be limited to a device consisting of components A and B only.

[0031] References to "one embodiment" or "an embodiment" in this specification mean that a particular feature, structure, or characteristic described in conjunction with the embodiment is included in at least one embodiment of the present invention. Therefore, the phrases "in one embodiment" or "in an embodiment" appearing in various places in this specification do not necessarily refer to the same embodiment, but may refer to the same embodiment. In addition, in one or more embodiments, the particular features, structures, or characteristics can be combined in any appropriate manner, as will be apparent to one of ordinary skill in the art from this disclosure.

[0032] Below, in conjunction with the accompanying drawings, a possible embodiment of the air-cooled chiller 10 in the present application is exemplarily described.

[0033] Figure 1 Schematic diagram of the connection structure of the air-cooled chiller 10 in this application. Figure 1 As shown, the air-cooled chiller 10 in the present application includes an inlet pipe, an outlet pipe, a cooling device 100 and a heating device 200. Among them, the cooling device 100 and the heating device 200 are connected in series between the inlet pipe and the outlet pipe through a pipe. When the water flowing in from the inlet pipe flows through the cooling device 100, the cooling device 100 cools the water, and when it flows through the heating device 200, the heating device 200 heats the water, and finally the water flows out from the outlet pipe. Thus, by setting the heating device 200, the water can be heated. Thus, when the user's cooling demand for water is below the minimum operating range of the cooling device 100, so that even if the cooling device 100 cools the water at the minimum load, the water temperature is still too low, the heating device 200 can be used to heat the water to make the water reach the target temperature. Thus, the adaptation range of the cooling demand can be improved and the start-stop frequency of the air-cooled chiller 10 can be reduced.

[0034] In some embodiments, Figure 1As shown, the water inlet of the heating device 200 is connected to the water inlet pipe; the cooling device 100 includes: an evaporator 110 (the low-temperature condensed cooling liquid passes through the evaporator 110, exchanges heat with the outside air, vaporizes and absorbs heat, and achieves a refrigeration effect), the water inlet of the evaporator 110 is connected to the water outlet pipe of the heating device 200, and the water outlet of the evaporator 110 is connected to the water outlet pipe. When water passes through the evaporator 110, it can exchange heat with the cooling liquid in the evaporator 110, thereby reducing the water temperature. Therefore, by connecting the water inlet of the evaporator 110 to the water outlet pipe of the heating device 200, when the user's demand for cooling the water is too small, the water can be heated first by the heating device 200, so that the cooling device 100 can be operated at a lower load so that the water can reach a predetermined temperature after being cooled by the cooling device 100. In addition, since the temperature adjustment accuracy of the cooling device 100 is greater than that of the heating device 200, the accuracy of the water temperature when the water reaches the outlet pipe can be improved by first heating the water by the heating device 200 and then cooling the water by the cooling device 100. At the same time, if the temperature of the water is too low, ice may form, thereby blocking the pipe. By first heating the water by the heating device 200 and then cooling the water by the cooling device 100, the problem of ice blocking the pipe due to too low water temperature when the water is first cooled by the cooling device 100 can be avoided. In this way, the stability of the operation of the air-cooled chiller 10 and the adaptation range of the air-cooled chiller 10 for adjusting the water temperature can be improved.

[0035] In some embodiments, the water outlet of the temperature raising device 200 is connected to the water outlet pipe; the water outlet of the evaporator 110 is connected to the water inlet pipe of the temperature raising device 200, and the water inlet of the evaporator 110 is connected to the water inlet pipe. Thus, the water can be cooled by the temperature lowering device 100 first, and then heated by the temperature raising device 200. Thus, the flexibility of the equipment can be improved and the design difficulty can be reduced.

[0036] In some embodiments, Figure 1As shown, the temperature raising device 200 includes a heat exchanger 210, and the heat exchanger 210 has a liquid inlet and a liquid outlet for the circulation of coolant. When the high-temperature coolant passes through the heat exchanger 210, it can exchange heat with the water in the heat exchanger 210, thereby raising the temperature of the water. The cooling device 100 also includes a compressor 120, and the compressor 120 has a liquid inlet and a liquid outlet for the circulation of coolant. The compressor 120 inhales low-temperature and low-pressure coolant gas from its liquid inlet, and after the piston is driven by the operation of the motor to compress the coolant gas, the high-temperature and high-pressure coolant gas is discharged to its liquid outlet, providing power for the refrigeration cycle. The liquid outlet of the compressor 120 is connected to the liquid inlet pipeline of the heat exchanger 210, and the high-temperature and high-pressure coolant is transported to the heat exchanger 210. Thus, the compressor 120 of the cooling device 100 can be reused to provide coolant to the heat exchanger 210 of the temperature raising device 200, so that the coolant exchanges heat with water in the heat exchanger 210 to increase the temperature of the water. Thus, the number of compressors 120 can be reduced, thereby reducing equipment costs.

[0037] In some embodiments, the heat exchanger 210 is a plate heat exchanger or a shell and tube heat exchanger. Therefore, a suitable type of heat exchanger 210 can be selected as needed, thereby improving the flexibility of the equipment and reducing the difficulty of design.

[0038] In some embodiments, Figure 1 As shown, the temperature increasing device 200 further includes an electric valve 220, which may be a solenoid valve or an electric ball valve. The electric valve 220 is disposed on a pipe between the liquid outlet of the compressor 120 and the liquid inlet of the heat exchanger 210. Thus, by arranging the electric valve 220 on the pipe between the liquid outlet of the compressor 120 and the liquid inlet of the heat exchanger 210, the connection and closing of the pipe between the liquid outlet of the compressor 120 and the liquid inlet of the heat exchanger 210 can be controlled. Thus, when the heat exchanger 210 is required to increase the temperature of the water, the pipe between the liquid outlet of the compressor 120 and the liquid inlet of the heat exchanger 210 can be opened by the electric valve 220, so that the coolant output by the compressor 120 can flow into the heat exchanger 210 to increase the temperature of the water. When the heat exchanger 210 is not needed to heat the water, the pipeline between the liquid outlet of the compressor 120 and the liquid inlet of the heat exchanger 210 can be closed by the electric valve 220 to prevent the coolant output by the compressor 120 from flowing into the heat exchanger 210 and affecting the water temperature.

[0039] In some embodiments, Figure 1As shown, the cooling device 100 also includes a condenser 130, an economizer 160, and an expansion valve 170. The condenser 130, the economizer 160, and the expansion valve 170 have a liquid inlet and a liquid outlet for the circulation of the coolant. The liquid inlet and the liquid outlet of the compressor 120, the condenser 130, the economizer 160, the expansion valve 170, and the evaporator 110 are connected end to end through a pipeline to form a ring. Among them, the condenser 130 can condense the high-temperature and high-pressure coolant in the condenser 130 and turn it into liquid, while releasing heat, and the fan dissipates heat from the condenser 130. The economizer 160 can absorb heat by throttling the coolant itself to evaporate so that another part of the coolant is supercooled, thereby further reducing the temperature of the coolant. The expansion valve 170 can make the coolant become low-temperature and low-pressure wet steam so that the coolant absorbs heat in the evaporator 110 to achieve a cooling effect.

[0040] In some embodiments, Figure 1 As shown, the liquid outlet of the heat exchanger 210 is connected to the liquid inlet pipe of the expansion valve 170. By connecting the liquid outlet of the heat exchanger 210 to the liquid inlet pipe of the expansion valve 170, the coolant completes heat exchange with water in the heat exchanger 210 and the temperature is reduced. Then, the coolant enters the evaporator 110 through the expansion valve 170 to cool the water, thereby realizing the secondary utilization of the coolant. In this way, the utilization efficiency of the coolant can be improved.

[0041] In some embodiments, Figure 1 As shown, the cooling device 100 also includes a three-way valve 180, which can be an electric three-way valve 180, or a three-way valve 180 composed of two electric ball valves. The three-way valve 180 has three interfaces, which are respectively connected to the liquid outlet of the economizer 160, the liquid outlet of the heat exchanger 210 and the liquid inlet pipeline of the expansion valve 170. Therefore, the three-way valve 180 can be used to control whether the liquid outlet of the heat exchanger 210 is connected to the liquid inlet of the expansion valve 170. Therefore, when the heating device 200 needs to work, the liquid outlet of the heat exchanger 210 can be controlled to be connected to the liquid inlet of the expansion valve 170, so that the coolant that completes the heat exchange in the heat exchanger 210 can flow to the expansion valve 170 and the evaporator 110. It is also possible to control the liquid outlet of the heat exchanger 210 to be disconnected from the liquid inlet of the expansion valve 170 when the heating device 200 is not needed to work, so as to avoid affecting the operation of the cooling device 100.

[0042] In some embodiments, the liquid outlet of the heat exchanger 210 may also be connected to the liquid inlet pipeline of the evaporator 110 .

[0043] In some embodiments, Figure 1 As shown, the cooling device 100 further includes a drying filter 140, which is disposed on a pipeline between a liquid outlet of the condenser 130 and a liquid inlet of the economizer 160, and can filter impurities in the coolant flowing therethrough.

[0044] In some embodiments, Figure 1 As shown, the cooling device 100 further includes a sight glass 150 , which is disposed on a pipeline between the filter dryer 140 and the economizer 160 . When the coolant flows through the sight glass 150 , the state of the coolant can be observed through the sight glass 150 .

[0045] The above content is an exemplary description of a possible embodiment of the air-cooled chiller 10. Next, in conjunction with the accompanying drawings, the specific structure of the air-cooled chiller 10 is described in detail in a specific embodiment.

[0046] like Figure 1 As shown, the air-cooled chiller 10 in the embodiment of the present application includes a cooling device 100 and a heating device 200. The heating device 200 is used to heat the water, and the cooling device 100 is used to cool the water. The heating device 200 and the cooling device 100 are connected in series between the water inlet pipe and the water outlet pipe through a pipe, so that the water in the water inlet pipe flows into the heating device 200 and the cooling device 100 successively, and then flows into the water outlet pipe. Therefore, when the user's demand for cooling the water is within the operating range of the cooling device 100, the heating device 200 can be turned off, and only the cooling device 100 is used to cool the water. When the user's demand for cooling water is below the minimum operating range of the cooling device 100, that is, even if the cooling device 100 cools the water at the minimum load, the temperature of the water in the outlet pipe is still lower than the target temperature, the heating device 200 can be turned on to heat the water first, and then the cooling device 100 can cool the water, thereby increasing the water temperature in the outlet pipe and making the water temperature reach the target temperature. In this way, the adaptation range of the cooling demand can be increased and the start-stop frequency of the air-cooled chiller 10 can be reduced.

[0047] like Figure 1As shown, the cooling device 100 includes an evaporator 110, a compressor 120, a condenser 130, a filter dryer 140, a sight glass 150, an economizer 160 and an expansion valve 170. Among them, the evaporator 110, the compressor 120, the condenser 130, the filter dryer 140, the sight glass 150, the economizer 160 and the expansion valve 170 have a liquid inlet and a liquid outlet for the circulation of the coolant, and the liquid inlet and the liquid outlet of the compressor 120, the condenser 130, the economizer 160, the expansion valve 170 and the evaporator 110 are connected end to end through a pipeline to form a ring, thereby forming a cooling system. The evaporator 110 also has a water inlet and a water outlet for the circulation of water. When water flows through the evaporator 110, it can be circulated by the coolant to exchange heat with the water in the evaporator 110, so as to cool the water. The operating range of the compressor 120 is 25% to 100%. When the compressor 120 operates at a load of 25%, the cooling device 100 can reduce the water temperature by, for example, 5°C. The higher the load of the compressor 120, the higher the water temperature drop.

[0048] like Figure 1 As shown, the temperature raising device 200 includes a heat exchanger 210, which is a plate heat exchanger having a liquid inlet and a liquid outlet for the circulation of coolant, and also having a water inlet and a water outlet for the circulation of water. When water flows through the evaporator 110, the coolant can circulate in the heat exchanger 210 to exchange heat with the water, thereby raising the temperature of the water.

[0049] like Figure 1 As shown, the liquid inlet of the heat exchanger 210 is connected to the liquid outlet pipeline of the compressor 120 in the cooling device 100, and the liquid outlet of the heat exchanger 210 is connected to the liquid inlet pipeline of the expansion valve 170. Therefore, the heat exchanger 210 can reuse the compressor 120 of the cooling device 100, and the compressor 120 in the cooling device 100 provides coolant to the heat exchanger 210, thereby reducing the equipment cost.

[0050] like Figure 1As shown, an electric valve 220 is also provided on the pipeline between the liquid inlet of the heat exchanger 210 and the liquid outlet of the compressor 120. The electric valve 220 is a solenoid valve that can control the connection and closing of the pipeline between the liquid inlet of the heat exchanger 210 and the liquid outlet of the compressor 120. A three-way valve 180 is provided on the pipeline between the liquid outlet of the economizer 160 and the liquid inlet of the expansion valve 170. The three-way valve 180 has three interfaces A, B, and C. Among them, interface A is connected to the liquid outlet pipeline of the economizer 160, interface B is connected to the liquid inlet pipeline of the expansion valve 170, and interface C is connected to the liquid outlet pipeline of the heat exchanger 210. Therefore, when the heating device 200 is not needed to work, the electric valve 220 is controlled to be closed, and the interfaces A and B in the three-way valve 180 are controlled to be opened, and the interface C is controlled to be closed, so that the coolant output by the compressor 120 cannot flow through the heat exchanger 210, so that the heat exchanger 210 cannot heat the water. When the heating device 200 needs to work, the electric valve 220 is controlled to open, and the interfaces A, B, and C in the three-way valve 180 are controlled to open, so that the coolant flows through the evaporator 110 to cool the water, and the coolant output by the compressor 120 flows through the heat exchanger 210, so that the heat exchanger 210 heats the water.

[0051] The air-cooled chiller 10 in this embodiment is used to provide cold water to users. When the water temperature in the water inlet pipe is 15°C, the water temperature in the water outlet pipe is required to be 5°C, that is, the water temperature is reduced by 10°C, and the heating device 200 does not need to work. The electric valve 220 is controlled to be closed, and the interfaces A and B in the three-way valve 180 are controlled to be opened, and the interface C is controlled to be closed. Only the cooling device 100 cools the water, so that the water temperature drops from 15°C to 5°C. When the water temperature in the water inlet pipe is 15°C, the water temperature in the water outlet pipe is required to be 12°C, that is, the water temperature is reduced by 3°C, and the heating device 200 needs to work. The electric valve 220 is controlled to be opened, and the interfaces A, B, and C in the three-way valve 180 are controlled to be opened, so that the heating device 200 heats the water, and the water temperature can be increased from 15°C to 20°C, for example. Therefore, the cooling device 100 needs to cool the water from 20°C to 12°C, that is, the water temperature is reduced by 8°C. At this time, the cooling device 100 adjusts the load of the compressor 120 to cool the water temperature from 20°C to 12°C.

[0052] Note that the above are only preferred embodiments of the present application and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present application is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, all of which belong to the scope of protection of the present invention.

Claims

1. An air-cooled chiller, characterized in that: include: Water inlet pipe; Outlet pipe; Cooling device; Heating device; The cooling device and the heating device are connected in series between the water inlet pipe and the water outlet pipe through a pipe. When the water flowing in from the water inlet pipe flows through the cooling device, the cooling device cools the water. When the water flows through the heating device, the heating device heats the water. Finally, the water flows out from the water outlet pipe.

2. The air-cooled chiller according to claim 1, characterized in that: The water inlet of the heating device is connected to the water inlet pipe; the cooling device includes: An evaporator, wherein the water inlet of the evaporator is connected to the water outlet pipe of the heating device, and the water outlet of the evaporator is connected to the water outlet pipe.

3. The air-cooled chiller according to claim 2, characterized in that: The heating device includes a heat exchanger, and the cooling device also includes a compressor. The heat exchanger and the compressor have a liquid inlet and a liquid outlet for circulating coolant. The liquid outlet of the compressor is connected to the liquid inlet pipe of the heat exchanger to transport coolant to the heat exchanger.

4. The air-cooled chiller according to claim 3, characterized in that: The heat exchanger is a plate heat exchanger or a shell and tube heat exchanger.

5. The air-cooled chiller according to claim 3 or 4, characterized in that: The temperature raising device further comprises: An electric valve is provided on a pipeline between the liquid outlet of the compressor and the liquid inlet of the heat exchanger.

6. The air-cooled chiller according to claim 5, characterized in that: The electric valve is a solenoid valve or an electric ball valve.

7. The air-cooled chiller according to claim 5, characterized in that: The cooling device also includes a condenser, an economizer, and an expansion valve. The condenser, the economizer, and the expansion valve have a liquid inlet and a liquid outlet for circulating the cooling liquid. The liquid inlets and liquid outlets of the compressor, the condenser, the economizer, the expansion valve, and the evaporator are connected end to end in sequence through pipes to form a ring.

8. The air-cooled chiller according to claim 7, characterized in that: The liquid outlet of the heat exchanger is connected to the liquid inlet pipeline of the expansion valve.

9. The air-cooled chiller according to claim 8, characterized in that: The cooling device further comprises: A three-way valve has three interfaces, which are respectively connected to the liquid outlet of the economizer, the liquid outlet of the heat exchanger and the liquid inlet pipeline of the expansion valve.

10. The air-cooled chiller according to claim 9, characterized in that: The three-way valve is an electric three-way valve, or a three-way valve composed of two electric ball valves.

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