Water chilling unit with mixed machine heads
By integrating the magnetic levitation head and the centrifugal head and utilizing the segmented design of the condenser and evaporator, the problem of low efficiency of the magnetic levitation and centrifugal units under different working conditions is solved, and efficient operation and energy saving of the chiller are achieved.
Patent Information
- Application Number
- CN202422820246.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-19
- Publication Date
- 2025-10-17
- Estimated Expiration
- 2034-11-19
AI Technical Summary
The magnetic levitation chiller and the centrifugal chiller have low efficiency when they are operating efficiently under different load rates and working conditions, resulting in low overall efficiency and high energy consumption of the chiller group.
The magnetic levitation head and the centrifugal head are integrated into a hybrid head chiller. Through the separate design of the condenser and evaporator, combined with the regulation of cooling water and chilled water, it is ensured that both operate under high efficiency conditions.
The magnetic levitation head and centrifugal head can operate efficiently at the same time, which improves the overall operating efficiency of the chiller and reduces energy consumption.
Smart Images
Figure CN223448679U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the field of refrigeration, relates to the improvement design of water chiller, specifically relates to a mixed machine head water chiller. BACKGROUND
[0002] In the refrigeration industry, at present, magnetic suspension water chiller is used in more and more projects due to its performance advantages, but the performance advantages of magnetic suspension unit are not sustained under various load rates and various working conditions, that is, its high efficiency needs necessary conditions. If its operating condition deviates from the high efficiency condition, its efficiency is close to or lower than that of centrifugal unit. The high efficiency working condition of magnetic suspension unit is obviously different from that of centrifugal unit, including:
[0003] 1. When the cooling water temperature of centrifugal unit is lower than 24 degrees, the efficiency will decrease, but the efficiency of magnetic suspension unit is higher when the cooling water temperature is lower than 24 degrees.
[0004] 2. The efficiency of centrifugal unit is the highest when the load rate is 85-95%, and the efficiency decreases obviously when the load rate decreases. The efficiency of magnetic suspension unit is higher when the load rate is lower than 60%, and the real-time COP can reach more than 14, which is twice that of centrifugal unit, but the efficiency decreases obviously when the load rate is high.
[0005] 3. The efficiency of centrifugal unit is high when the rated refrigerating capacity of single machine head is large, and the efficiency is low when the refrigerating capacity is small. The rated refrigerating capacity of single machine head of magnetic suspension unit is smaller than that of centrifugal unit.
[0006] It can be seen that the performance characteristics of the two units cause that both of them cannot run efficiently when the load is medium or low, which accounts for most of the time of the whole year, resulting in low efficiency and high energy consumption of water chiller group. SUMMARY
[0007] The utility model discloses a mixed machine head water chiller, which integrates magnetic suspension machine head and centrifugal machine head into one water chiller, can fully exert the performance characteristics of magnetic suspension machine head and centrifugal machine head, makes magnetic suspension machine head and centrifugal machine head can be in high efficiency running state at the same time, improves the running efficiency of water chiller and reduces the running energy consumption.
[0008] Technical solution: In order to achieve the above object, the utility model provides a mixed machine head water chilling unit, including condenser and evaporimeter, still include magnetic suspension machine head and centrifugal machine head, the condenser is divided into magnetic suspension condensing part and centrifugal condensing part, be provided with the condensing pipe bundle of through magnetic suspension condensing part and centrifugal condensing part in the condenser, the evaporimeter is divided into magnetic suspension evaporation part and centrifugal evaporation part, be provided with the evaporation pipe bundle of through magnetic suspension evaporation part and centrifugal evaporation part in the evaporimeter, the magnetic suspension machine head is connected with magnetic suspension condensing part and magnetic suspension evaporation part respectively, the centrifugal machine head is connected with centrifugal condensing part and centrifugal evaporation part respectively.
[0009] Further, the condenser is provided with a cooling water inlet and a cooling water outlet, and the cooling water inlet and the cooling water outlet are respectively connected with the magnetic suspension condensing part and the centrifugal condensing part.
[0010] Further, the evaporimeter is provided with a chilled water return inlet and a chilled water return outlet, and the chilled water return inlet and the chilled water return outlet are respectively connected with the centrifugal evaporation part and the magnetic suspension evaporation part.
[0011] Further, a first pressure relief device is arranged between the magnetic suspension condensing part and the magnetic suspension evaporation part, so as to timely release pressure and ensure safe operation.
[0012] Further, a second pressure relief device is arranged between the centrifugal condensing part and the centrifugal evaporation part, so as to timely release pressure and ensure safe operation.
[0013] Beneficial effects: Compared with the prior art, the utility model discloses a magnetic suspension machine head and a centrifugal machine head are mixedly installed on a water chilling unit, and the condenser and the evaporimeter are shared. Chilled water is first introduced into the centrifugal machine head end, and the water temperature is adjusted to make the centrifugal machine head run in a high-efficiency area with a load rate of 90%. Cooling water is first introduced into the magnetic suspension machine head end, and the centrifugal machine head runs in a high-efficiency area with a low cooling water temperature and a low load rate because the centrifugal machine head has already run in a high load rate and bears a large amount of refrigerating capacity. Thus, both the machine heads run in a high-efficiency area, the overall operation efficiency of the water chilling unit is improved, and the operation energy consumption is saved. BRIEF DESCRIPTION OF DRAWINGS
[0014] Figure 1 It is a structural schematic view of the utility model. DETAILED DESCRIPTION
[0015] The utility model will be further illustrated in combination with the drawings and specific embodiments, and it should be understood that these embodiments are only used for illustrating the utility model and are not used for limiting the scope of the utility model. After reading the utility model, those skilled in the art can make various equivalent modifications of the utility model, and all these modifications fall within the scope defined by the claims attached to the present application.
[0016] For example, Figure 1The utility model provides a mixed machine head water chilling unit, including condenser 3, evaporimeter 4, magnetic suspension machine head 1 and centrifugal machine head 2, condenser 3 is divided into magnetic suspension condensing part 5 and centrifugal condensing part 6, and condenser 3 is provided with the condensing pipe bundle 33 of through magnetic suspension condensing part 5 and centrifugal condensing part 6, evaporimeter 4 is divided into magnetic suspension evaporation part 7 and centrifugal evaporation part 8, and evaporimeter 4 is provided with the evaporation pipe bundle 43 of through magnetic suspension evaporation part 7 and centrifugal evaporation part 8, and condenser 3 is provided with cooling water inlet 31 and cooling water outlet 32, and cooling water inlet 31 and cooling water outlet 32 are linked with magnetic suspension condensing part 5 and centrifugal condensing part 6 respectively, and evaporimeter 4 is provided with refrigerated water return inlet 41 and refrigerated water return outlet 42, and refrigerated water return inlet 41 and refrigerated water return outlet 42 are linked with centrifugal evaporation part 8 and magnetic suspension evaporation part 7 respectively, and magnetic suspension machine head 1 is connected with magnetic suspension condensing part 5 and magnetic suspension evaporation part 7 respectively through first connecting pipe 13 and second connecting pipe 12, and centrifugal machine head 2 is connected with centrifugal condensing part 6 and centrifugal evaporation part 8 respectively through third connecting pipe 23 and fourth connecting pipe 22, and first pressure relief device 11 is arranged between magnetic suspension condensing part 5 and magnetic suspension evaporation part 7, and second pressure relief device 21 is arranged between centrifugal condensing part 6 and centrifugal evaporation part 8, and first pressure relief device 11 and second pressure relief device 21 are all pressure relief valves.
[0017] The mixed machine head water chilling unit is applied in the embodiment, and the specific application and operation process are as follows:
[0018] The high-temperature refrigerated water return enters the centrifugal evaporation part 8 of the evaporimeter 4 from the refrigerated water return inlet 41, and is cooled to a specified temperature under the action of the centrifugal machine head 2, and the specific temperature value is determined by setting the temperature value at the outlet end 25 of the centrifugal evaporation part 8 of the centrifugal machine head 2, and the centrifugal machine head 2 is controlled to operate in the high-efficiency zone with a load rate of about 90%, and the cooled refrigerated water return enters the magnetic suspension evaporation part 7, at this time, the magnetic suspension machine head 1 works in a low-load state due to the fact that the centrifugal machine head 2 bears a load rate of about 90%, so that the magnetic suspension machine head 1 works in a low-load state, and the magnetic suspension machine head 1 works in a high-efficiency state by setting the temperature value at the water outlet end 15 of the magnetic suspension evaporation part 7, and the cooled refrigerated water return flows out from the refrigerated water return outlet 42 under the action of the magnetic suspension machine head 1.
[0019] At the same time, the cooling water from the cooling tower enters the magnetic suspension condensing part 5 of the condenser 3 from the cooling water inlet 31. Since the temperature of the cooling water is lowered at this time, the operation efficiency of the magnetic suspension head 1 is improved, so that the magnetic suspension head 1 is in a high-efficiency operation state. The cooling water warmed by the magnetic suspension head 1 is higher in temperature, which is conducive to improving the operation efficiency of the centrifugal head 2, so that the centrifugal head 2 is in a high-efficiency operation state. The cooling water warmed by the centrifugal head 2 flows out from the cooling water outlet 32.
[0020] From the above process, it can be seen that during the operation of the water chiller, the magnetic suspension head 1 and the centrifugal head 2 can both be continuously in a high-efficiency operation state at the same time, improving the overall operation efficiency of the water chiller and saving operation energy consumption.
Claims
1. A mixing head chiller, comprising a condenser and an evaporator, characterized in that: It also includes a magnetic levitation head and a centrifugal head. The condenser is divided into a magnetic levitation condensation part and a centrifugal condensation part. A condensation tube bundle passing through the magnetic levitation condensation part and the centrifugal condensation part is provided in the condenser. The evaporator is divided into a magnetic levitation evaporation part and a centrifugal evaporation part. An evaporation tube bundle passing through the magnetic levitation evaporation part and the centrifugal evaporation part is provided in the evaporator. The magnetic levitation head is respectively connected to the magnetic levitation condensation part and the magnetic levitation evaporation part, and the centrifugal head is respectively connected to the centrifugal condensation part and the centrifugal evaporation part.
2. A mixing head chiller according to claim 1, characterized in that: The condenser is provided with a cooling water inlet and a cooling water outlet, and the cooling water inlet and the cooling water outlet are respectively connected to the magnetic suspension condensation part and the centrifugal condensation part.
3. A mixing head chiller according to claim 1, characterized in that: The evaporator is provided with a chilled water return inlet and a chilled water return outlet, and the chilled water return inlet and the chilled water return outlet are respectively connected to the centrifugal evaporation part and the magnetic suspension evaporation part.
4. A mixing head chiller according to claim 1, characterized in that: A first pressure relief device is provided between the magnetic suspension condensation part and the magnetic suspension evaporation part.
5. The mixing head chiller according to claim 1, characterized in that: A second pressure relief device is provided between the centrifugal condensation part and the centrifugal evaporation part.