Cooling tower and cooling machine integrated all-in-one machine

Abstract

The utility model relates to a cooling tower and cooling machine integrated all-in-one machine which comprises a cooling tower, a plate heat exchanger, an air suspension cooling-water machine, a bypass valve, a first electric valve, a second electric valve and a freezing pump, a water outlet of the freezing pump is communicated with a hot end inlet of the plate heat exchanger, and a hot end outlet of the freezing pump is communicated with an evaporation heat exchange end inlet of the air suspension cooling-water machine. An evaporation heat exchange end outlet is communicated with a water supply pipe network, the two ends of the bypass valve are communicated with an evaporation heat exchange end inlet and an evaporation heat exchange end outlet of the air suspension cooling-water machine respectively, a condensation heat exchange end inlet of the air suspension cooling-water machine is communicated with one end of the first electric valve, and the other end of the first electric valve is communicated with a cold end outlet of the plate heat exchanger. The cold end outlet is further communicated with one end of the second electric valve, the other end of the second electric valve is communicated with the water inlet end of the cooling tower, a cold end inlet of the plate heat exchanger is communicated with the water outlet end of the cooling tower, and a condensation heat exchange end outlet of the air suspension cooling-water machine is communicated with the water inlet end of the cooling tower. The limitation of regional problems is effectively solved, all-region application can be achieved, and the energy-saving effect is achieved.

Description

Technical Field

[0001] The utility model relates to the field of cooling towers, in particular to a cooling tower and cooling machine integrated machine. Background Art

[0002] In data centers and other fields, in order to maintain a constant indoor temperature, refrigeration units need to run all year round to cool the equipment in the computer room to ensure the normal operation of the equipment in the computer room. Under the dual pressure of energy conservation and emission reduction and reducing operating costs, it is necessary to continuously develop new energy-saving technologies and products, make full use of the space of the computer room in a simpler and more convenient way, save the area of ​​the rooftop refrigeration room, reduce the construction cost of the refrigeration room, reduce the installation of cooling water pipes on site, reduce the head of the cooling water pump, and achieve energy saving. Utility Model Content

[0003] In order to overcome the shortcomings of existing products and technologies, the utility model provides an integrated cooling tower and cooling machine machine, which can well integrate the advantages of air suspension mechanical refrigeration and cooling tower pre-cooling mode, increase the heat exchange of cooling tower and plate exchanger, and the integrated machine fully combines mechanical refrigeration and pre-cooling mode to effectively solve the limitations due to geographical issues, integrates cooling machine, cooling tower and plate exchanger, reduces maintenance cost, reduces failure rate and reduces energy consumption. The modular design of the integrated machine can be applicable to all regions and achieve an energy-saving effect.

[0004] The technical solution of the implementation case of the utility model is as follows:

[0005] A cooling tower chiller integrated machine, comprising a cooling tower body, a plate heat exchanger, an air suspension chiller, a bypass valve, a first electric valve, a second electric valve, a freezing pump, and a controller. The air suspension chiller is located below the cooling tower body and is integrated with the cooling tower body to form an integral module. The external chilled water return pipe network is connected to the water inlet of the freezing pump through a pipe, the water outlet of the freezing pump is connected to the hot end inlet of the plate heat exchanger through a pipe, the hot end outlet of the plate heat exchanger is connected to the evaporative heat exchange end inlet of the air suspension chiller through a pipe, the evaporative heat exchange end outlet of the air suspension chiller is connected to the external chilled water supply pipe network through a pipe, and the two ends of the bypass valve are respectively connected to the evaporative heat exchange end inlet of the air suspension chiller and the air suspension chiller through a pipe. The evaporation heat exchange end outlet of the machine is connected, the condensation heat exchange end inlet of the air suspension chiller is connected with one end of the first electric valve through a pipeline, the other end of the first electric valve is connected with the cold end outlet of the plate heat exchanger through a pipeline, the cold end outlet of the plate heat exchanger is also connected with one end of the second electric valve through a pipeline, the other end of the second electric valve is connected with the water inlet end of the cooling tower body through a pipeline, the cold end inlet of the plate heat exchanger is connected with the water outlet end of the cooling tower body through a pipeline, the condensation heat exchange end outlet of the air suspension chiller is connected with the water inlet end of the cooling tower body through a pipeline, and the controller is electrically connected to the bypass valve, the first electric valve, the second electric valve, the air suspension chiller, the refrigeration pump, and the cooling tower body.

[0006] Preferably, the air-suspended chiller includes an air-suspended centrifugal compressor, a shell and tube condenser, a flooded evaporator, and a throttling device. The air outlet of the flooded evaporator is connected to the air inlet of the air-suspended centrifugal compressor through a pipeline, the air outlet of the air-suspended centrifugal compressor is connected to the air inlet of the shell and tube condenser through a pipeline, the liquid outlet of the shell and tube condenser is connected to one end of the throttling device through a pipeline, and the other end of the throttling device is connected to the liquid inlet of the flooded evaporator through a pipeline.

[0007] Preferably, the cooling tower body includes a tower body and a water distributor, filler, water storage tank, fan, and cooling pump inside the tower body. The filler is located at the air inlet of the tower body, the water distributor is located above the filler, and the water storage tank is located below the filler. The water inlet of the cooling pump is connected to the water storage tank through a pipeline, and the water outlet of the cooling pump is connected to the cold end inlet of the plate heat exchanger through a pipeline. The fan is located at the top of the tower body, and the fan, the cooling pump and the controller are electrically connected.

[0008] Preferably, the cooling tower body also includes a precooling surface cooler and a precooling pump. The water inlet of the precooling pump is connected to the water storage tank through a pipeline, the water outlet of the precooling pump is connected to the liquid inlet end of the precooling surface cooler through a pipeline, the liquid outlet end of the precooling surface cooler is connected to the water distributor through a pipeline, and the precooling pump is electrically connected to the controller.

[0009] Compared with the prior art, the beneficial effects of the present invention are:

[0010] It can well integrate the advantages of air-suspended mechanical refrigeration of the chiller and the pre-cooling mode of the cooling tower, increase the heat exchange of the cooling tower and the plate exchanger, and increase the plate exchanger for pre-cooling during normal operation. The all-in-one machine fully combines mechanical refrigeration and pre-cooling modes to effectively solve the limitations caused by geographical issues. It integrates the chiller, cooling tower and plate exchanger to reduce maintenance costs, reduce failure rate, and reduce energy consumption. The modular design of the all-in-one machine can be applicable to all regions. In summer and transitional seasons, mechanical refrigeration and pre-cooling plate exchangers can be operated at the same time, and in winter, only the pre-cooling tower can be used to operate, achieving mechanical refrigeration mode cop≥10, automatic mode switching operation, and avoiding the problem of control system disorder caused by mode switching. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the structural principle of a cooling tower and cooling machine integrated machine in the utility model;

[0012] Figure 2 It is a schematic diagram of the structural principle of a cooling tower and cooling machine integrated machine in the utility model operating in summer and transition season;

[0013] Figure 3 It is a schematic diagram of the structural principle of a cooling tower and cooling machine integrated machine in the utility model operating in winter;

[0014] 10. Cooling tower body; 11. Water distributor; 12. Filler; 13. Water storage tank; 14. Fan; 15. Cooling pump; 16. Precooling surface cooler; 17. Precooling pump; 20. Plate heat exchanger; 30. Air-suspended chiller; 31. Air-suspended centrifugal compressor; 32. Shell and tube condenser; 33. Full-liquid evaporator; 34. Throttling device; 40. Bypass valve; 50. First electric valve; 60. Second electric valve; 70. Refrigeration pump. DETAILED DESCRIPTION

[0015] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0016] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0017] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0018] like Figure 1 As shown, Figure 1 Schematic diagram of the structural principle of a cooling tower chiller integrated machine in the utility model; a cooling tower chiller integrated machine, including a cooling tower body 10, a plate heat exchanger 20, an air suspension chiller 30, a bypass valve 40, a first electric valve 50, a second electric valve 60, a freezing pump 70, and a controller. The air suspension chiller 30 is located below the cooling tower body 10 and is integrated with the cooling tower body 10 to form an integral module. The external chilled water return pipe network is connected to the water inlet of the freezing pump 70 through a pipe, and the outlet of the freezing pump 70 is connected to the hot end inlet of the plate heat exchanger 20 through a pipe. The hot end outlet of the plate heat exchanger 20 is connected to the evaporation heat exchange end inlet of the air suspension chiller 30 through a pipe. The evaporation heat exchange end outlet of the air suspension chiller 30 is connected to the external chilled water supply pipe network through a pipe. The two ends of the bypass valve 40 are respectively connected to the evaporation heat exchange end of the air suspension chiller 30 through pipes. The heat exchange end inlet and the evaporation heat exchange end outlet of the air suspension chiller 30 are connected, the condensation heat exchange end inlet of the air suspension chiller 30 is connected with one end of the first electric valve 50 through a pipeline, the other end of the first electric valve 50 is connected with the cold end outlet of the plate heat exchanger 20 through a pipeline, the cold end outlet of the plate heat exchanger 20 is also connected with one end of the second electric valve 60 through a pipeline, the other end of the second electric valve 60 is connected with the water inlet of the cooling tower body 10 through a pipeline, the cold end inlet of the plate heat exchanger 20 is connected with the water outlet of the cooling tower body 10 through a pipeline, the condensation heat exchange end outlet of the air suspension chiller 30 is connected with the water inlet of the cooling tower body 10 through a pipeline, and the controller is electrically connected to the bypass valve 40, the first electric valve 50, the second electric valve 60, the air suspension chiller 30, the freezing pump 70, and the cooling tower body 10.

[0019] The air suspension chiller is integrated into a cooling tower. When you go to the site, you only need to connect the chilled water and electricity. Simplify the cooling water pipeline, increase the pre-cooling plate exchange combination, and save installation costs. At present, the cooling capacity of the integrated machine can reach 200~800RT, or even larger cooling capacity, to achieve more precise control, combine natural cooling and mechanical cooling, complete mode switching through the first electric valve, the second electric valve, and the bypass valve, and facilitate maintenance and repair. Only one set of coil heat exchange is needed at the air conditioning terminal to complete 24-hour, uninterrupted operation throughout the year, and achieve mechanical cooling mode cop ≥ 10, with higher comprehensive energy efficiency throughout the year, and combined operation of mechanical cooling and natural cooling.

[0020] The integrated machine operates in two modes, mixed cooling and natural cooling, according to the external temperature. The controller detects the external temperature through the temperature sensor and judges that the external temperature is greater than 22°C. The integrated machine enters the mixed cooling mode. At this time, the air suspension chiller is running and the plate heat exchanger is working. The controller controls the bypass valve to be disconnected, the first electric valve to be turned on, and the second electric valve to be disconnected. The integrated machine operates in the mixed cooling mode. It is judged that the external temperature is less than 22°C and the integrated machine enters the natural cooling mode. At this time, the air suspension chiller is closed, the plate heat exchanger is working, the controller controls the bypass valve to be turned on, the first electric valve to be turned on, and the second electric valve to be turned on. The integrated machine operates in the natural cooling mode.

[0021] As for the specific structure of the air-suspended chiller, preferably, the air-suspended chiller 30 includes an air-suspended centrifugal compressor 31, a shell and tube condenser 32, a fully liquid evaporator 33, and a throttling device 34, the air outlet of the fully liquid evaporator 33 is connected to the air inlet of the air-suspended centrifugal compressor 31 through a pipeline, the air outlet of the air-suspended centrifugal compressor 31 is connected to the air inlet of the shell and tube condenser 32 through a pipeline, the liquid outlet of the shell and tube condenser 32 is connected to one end of the throttling device 34 through a pipeline, and the other end of the throttling device 34 is connected to the liquid inlet of the fully liquid evaporator 33 through a pipeline.

[0022] like Figure 2 As shown, Figure 2This is a schematic diagram of the structural principle of a cooling tower and chiller integrated all-in-one machine in the utility model operating in summer and transition seasons; when the external temperature is greater than 22°C, the all-in-one machine enters the mixed refrigeration mode, the air suspension compressor operates, the plate heat exchanger works, the cooling water exchanges heat with the shell and tube condenser, the chilled return water first passes through the plate heat exchanger, pre-cooling and heat exchange are completed, and then enters the evaporator shell and tube heat exchange, and the outlet water temperature reaches 22°C, which meets normal cooling needs. It can be adjusted by the first electric valve and the second electric valve. The valve is adjusted so that the chilled return water first passes through the plate heat exchanger for heat exchange, and the high-temperature chilled return water is pre-cooled to 25-27°C through the plate heat exchanger before entering the chiller evaporator to be cooled to 22°C again, or the outlet water temperature can be increased to 22`25°C. Increasing the switching point is also to achieve maximum energy saving, make full use of the natural cooling method of the pre-cooling tower, reduce the energy consumption of the chiller and achieve the maximum energy saving effect.

[0023] like Figure 3 As shown, Figure 3 This is a schematic diagram of the structural principle of a cooling tower chiller integrated machine in the utility model operating in winter; when the cooling water temperature is less than 22°C, it enters the natural cooling mode, the air suspension compressor stops running, the plate heat exchanger is turned on, and the natural cooling mode cycle is completed. The chilled water and the water in the pre-cooling tower can be exchanged through the plate heat exchanger to reach an outlet water temperature of less than 22°C. The pre-cooling water is cooled normally, and even a lower water temperature can be reached. The heat exchange temperature difference is increased to reduce the flow rate. The cooling water can be filtered and the water ion difficulty is detected to reduce scale, save the energy consumption of the refrigeration pump, and increase the heat exchange efficiency. After the chilled water is heat exchanged, it can meet the normal cooling needs. If the cooling water temperature is too low, electric heating can be added to assist heating. In the severe winter, antifreeze can be added to reduce the risk of freezing.

[0024] The working principle of the integrated machine is as follows: In summer and transitional seasons, the high-temperature and high-pressure gaseous refrigerant from the air suspension compressor is first condensed by the shell and tube condenser, and the condensed liquid refrigerant directly enters the bottom of the condenser to add pipeline storage, and the pipeline storage is also used as a storage tank to ensure a certain amount of fluorine filling. The cooling water of the cooling tower is reduced to 31°C through the plate heat exchanger to cool the high-temperature and high-pressure fluorine vapor. After all the gaseous refrigerant becomes liquid refrigerant, it is throttled and reduced in pressure by the throttling device to become low-temperature and low-pressure liquid refrigerant, and enters the evaporator to exchange heat with the 27°C chilled water exchanged by the plate heat exchanger, so that the chilled water outlet temperature reaches 22°C and is sent back to the terminal air conditioner. The liquid refrigerant absorbs heat and returns to the air suspension compressor. According to the load level of the terminal, the chiller realizes variable frequency regulation, and this cycle is repeated; in winter, the chiller system stops running, and the cooling water of the cooling tower is used to exchange heat to produce 21°C chilled water. Under the high-efficiency heat exchange of the plate heat exchanger, the chilled water completes a heat exchange temperature difference as low as 1°C. The plate heat exchanger should be cleaned regularly to prevent scaling. In the low-temperature winter season in the north, the auxiliary outdoor water tank can be heated by electric heating to preheat the water temperature to prevent the freezing of the cooling water temperature when the load is low or the machine is shut down. Then the system switches to the precooling mode to complete the natural cooling cycle of cooling water and chilled water.

[0025] As for how to achieve cooling of the cooling tower body, preferably, the cooling tower body 10 includes a tower body and a water distributor 11, a filler 12, a water storage tank 13, a fan 14, and a cooling pump 15 inside the tower body. The filler 11 is located at the air inlet of the tower body, the water distributor 11 is located above the filler 12, the water storage tank 13 is located below the filler 12, the water inlet of the cooling pump 15 is connected to the water storage tank 13 through a pipeline, the water outlet of the cooling pump 15 is connected to the cold end inlet of the plate heat exchanger 20 through a pipeline, the fan 14 is located at the top of the tower body, and the fan 14 and the cooling pump 15 are electrically connected to the controller.

[0026] In order to further reduce the cooling water temperature, preferably, the cooling tower body 10 also includes a precooling surface cooler 16 and a precooling pump 17. The water inlet of the precooling pump 17 is connected to the water storage tank 13 through a pipeline, and the water outlet of the precooling pump 17 is connected to the liquid inlet end of the precooling surface cooler 16 through a pipeline, and the liquid outlet end of the precooling surface cooler 16 is connected to the water distributor 11 through a pipeline, and the precooling pump 17 is electrically connected to the controller.

[0027] Compared with the prior art, the beneficial effects of the present invention are:

[0028] It can well integrate the advantages of air-suspended mechanical refrigeration of the chiller and the pre-cooling mode of the cooling tower, increase the heat exchange of the cooling tower and the plate exchanger, and increase the plate exchanger for pre-cooling during normal operation. The all-in-one machine fully combines mechanical refrigeration and pre-cooling modes to effectively solve the limitations caused by geographical issues. It integrates the chiller, cooling tower and plate exchanger to reduce maintenance costs, reduce failure rate, and reduce energy consumption. The modular design of the all-in-one machine can be applicable to all regions. In summer and transitional seasons, mechanical refrigeration and pre-cooling plate exchangers can be operated at the same time, and in winter, only the pre-cooling tower can be used to operate, achieving mechanical refrigeration mode cop≥10, automatic mode switching operation, and avoiding the problem of control system disorder caused by mode switching.

[0029] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0030] The above embodiments only express the preferred implementation of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A cooling tower and cooling machine integrated machine, characterized in that: The invention comprises a cooling tower body, a plate heat exchanger, an air suspension chiller, a bypass valve, a first electric valve, a second electric valve, a freezing pump, and a controller. The air suspension chiller is located below the cooling tower body and is integrated with the cooling tower body to form an integral module. The external chilled water return network is connected with the water inlet of the freezing pump through a pipeline, the water outlet of the freezing pump is connected with the hot end inlet of the plate heat exchanger through a pipeline, the hot end outlet of the plate heat exchanger is connected with the evaporative heat exchange end inlet of the air suspension chiller through a pipeline, the evaporative heat exchange end outlet of the air suspension chiller is connected with the external chilled water supply network through a pipeline, and the two ends of the bypass valve are respectively connected with the evaporative heat exchange end inlet of the air suspension chiller and the evaporative heat exchange end outlet of the air suspension chiller through a pipeline. The outlet of the end is connected, the inlet of the condensing heat exchange end of the air-suspended chiller is connected to one end of the first electric valve through a pipeline, the other end of the first electric valve is connected to the cold end outlet of the plate heat exchanger through a pipeline, the cold end outlet of the plate heat exchanger is also connected to one end of the second electric valve through a pipeline, the other end of the second electric valve is connected to the water inlet end of the cooling tower body through a pipeline, the cold end inlet of the plate heat exchanger is connected to the water outlet end of the cooling tower body through a pipeline, the condensing heat exchange end outlet of the air-suspended chiller is connected to the water inlet end of the cooling tower body through a pipeline, and the controller is electrically connected to the bypass valve, the first electric valve, the second electric valve, the air-suspended chiller, the refrigeration pump, and the cooling tower body.

2. The cooling tower and refrigeration machine integrated machine according to claim 1, characterized in that: The air-suspended chiller includes an air-suspended centrifugal compressor, a shell and tube condenser, a flooded evaporator, and a throttling device. The air outlet of the flooded evaporator is connected to the air inlet of the air-suspended centrifugal compressor through a pipeline, the air outlet of the air-suspended centrifugal compressor is connected to the air inlet of the shell and tube condenser through a pipeline, the liquid outlet of the shell and tube condenser is connected to one end of the throttling device through a pipeline, and the other end of the throttling device is connected to the liquid inlet of the flooded evaporator through a pipeline.

3. The cooling tower and refrigeration machine integrated machine according to claim 2, characterized in that: The cooling tower body includes a tower body and a water distributor, filler, water storage tank, fan, and cooling pump inside the tower body. The filler is located at the air inlet of the tower body, the water distributor is located above the filler, and the water storage tank is located below the filler. The water inlet of the cooling pump is connected to the water storage tank through a pipeline, and the water outlet of the cooling pump is connected to the cold end inlet of the plate heat exchanger through a pipeline. The fan is located at the top of the tower body, and the fan, the cooling pump and the controller are electrically connected.

4. The cooling tower and refrigeration machine integrated machine according to claim 3, characterized in that: The cooling tower body also includes a precooling surface cooler and a precooling pump. The water inlet of the precooling pump is connected to the water storage tank through a pipeline, the water outlet of the precooling pump is connected to the liquid inlet end of the precooling surface cooler through a pipeline, the liquid outlet end of the precooling surface cooler is connected to the water distributor through a pipeline, and the precooling pump is electrically connected to the controller.

Images