CN209991629U - Refrigerating system for artificial ice rink - Google Patents
Refrigerating system for artificial ice rink Download PDFInfo
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- CN209991629U CN209991629U CN201920392932.3U CN201920392932U CN209991629U CN 209991629 U CN209991629 U CN 209991629U CN 201920392932 U CN201920392932 U CN 201920392932U CN 209991629 U CN209991629 U CN 209991629U
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Abstract
The utility model discloses a refrigerating system for artifical ice rink, a serial communication port, a refrigerating system for artifical ice rink includes main refrigerating unit (1), evaporative condenser (2), main refrigerating unit heat exchanger (3), cold-storage pond (4), cryopump (5), circulating pump (6) and cold calandria (7). The main refrigerating unit (1) adopts a single-unit two-stage compressor, and the refrigerant adopts Freon R404; the main refrigerating unit heat exchanger (3) is completely immersed in the secondary refrigerant of the cold storage water tank (4); the cold discharge pipes (7) are laid in a sand layer of the ice rink.
Description
Technical Field
The utility model relates to a low temperature refrigeration field, concretely relates to a refrigerating system for artifical ice rink.
Background
The general practical liquid ammonia refrigerating system and freon refrigerating system of artifical ice field among the prior art, the two all belong to direct evaporation refrigerating system. The liquid ammonia refrigerating system generally comprises a refrigerating unit, an ammonia-oil separator, a high-pressure liquid storage device, a condenser, a low-pressure circulating liquid storage barrel, an oil collector, an ammonia pump, an air cooler and the like, although the liquid ammonia refrigerating efficiency is higher, and the operation cost is lower, the system is complex in pipeline, high in operation management difficulty and high in requirement on the professional level of an operator, and meanwhile, due to the fact that automation is difficult to achieve, the system needs 24-hour on-duty operation management of the operator. And the problems of difficult oil return and easy leakage of liquid ammonia in a direct evaporation system exist, and once the ammonia gas is leaked, explosion accidents are easy to occur. The input cost of the Freon refrigeration system is high in the initial construction stage, the Freon refrigeration system is also used as a direct evaporation system, mixed lubricating oil is needed, and when the vertical height or the total length of a connecting copper pipe of an outdoor unit of the refrigeration system is increased, serious oil return unsmooth of the refrigeration system can be caused, so that the refrigeration efficiency is greatly reduced, and the power consumption is greatly increased. Furthermore, since freon refrigerant has no significant characteristics in the case of leakage, the operational cost is significantly increased in the case of leakage repair and filling of refrigerant.
In the prior art, an indirect refrigeration system using a practical glycol solution as a secondary refrigerant is used for refrigeration of an artificial ice rink, but the freezing point of the glycol solution is reduced along with the increase of the concentration of the glycol, and the concentration of the glycol must be increased in order to obtain a lower freezing point, so that the corrosivity of the glycol solution is greatly improved, and the impurity accumulation in a cold discharge pipe is easily caused for a long time, so that the refrigeration effect is reduced.
Therefore, a refrigeration system for an artificial ice rink, which can be operated safely and is environmentally friendly and energy-saving, is urgently needed in the field.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a refrigerating system who is applicable to artifical ice rink is provided with following characteristics: firstly, the refrigerating system can safely operate without explosion hidden danger; secondly, the system has no pollution to the environment; and thirdly, the system has low energy consumption and lower operation cost than the ice rink refrigerating system in the prior art.
In order to solve the technical problem the utility model provides a refrigerating system for artifical ice field for the refrigerating system of artifical ice field includes main refrigerating unit 1, evaporative condenser 2, main refrigerating unit heat exchanger 3, cold-storage pond 4, cryopump 5, circulating pump 6 and cold calandria 7. The main refrigerating unit 1 adopts a single-unit two-stage compressor, and the refrigerant adopts Freon R404; the main refrigerating unit heat exchanger 3 is immersed in the secondary refrigerant of the cold storage water tank 4; the cold discharge pipes 7 are laid in a sand layer of the ice rink.
In one embodiment, the interior of the cold storage water pool 4The layer is a 0.5mm carbon steel plate, the outer layer is a 300mm polyurethane heat-insulating layer, and the whole capacity is 80m3And the secondary refrigerant contains water dispersible polyisocyanate.
In one embodiment, the coolant is cooled to-40 ℃ by the main refrigeration unit 1.
In one embodiment, when the ice temperature reaches-15℃, the freeze pump 5 is turned off and the circulation pump 6 is turned on, and the coolant is circulated only through the cold row pipe 7.
In one embodiment, the main refrigeration unit 1 is only on during the off-peak periods of electricity prices, with other periods being off.
The utility model provides an among the indirect refrigerating system main refrigerating unit include compressor and choke valve, the compressor adopts unit doublestage screw compressor. The single-machine two-stage screw compressor can be loaded and used only at a low-temperature section, namely below-25 ℃, and easily causes the unit to be burnt down due to overlarge current if the refrigeration load is overlarge at a high-temperature section. The cold accumulation water tank can ensure that the single two-stage compressor always operates in the low temperature section, namely, the secondary refrigerant in the second refrigeration cycle system is not higher than-25 ℃. Therefore, the energy consumption of the whole refrigerating system is reduced by utilizing the characteristic of high efficiency ratio of the single-machine two-stage compressor, which is one of the key technologies of the utility model. And in the initial stage of the operation of the refrigeration system of the utility model, namely when the secondary refrigerant in the cold accumulation water tank is not lower than-25 ℃, the single-machine two-stage compressor can be operated in a state lower than the general full load power of the single-machine two-stage compressor, at the moment, the refrigeration effect is poor, but the compressor can be ensured not to break down, or other refrigeration units are utilized to pull down the temperature of the secondary refrigerant in the cold accumulation water tank, and the single-machine two-stage screw compressor is started to operate when the temperature is lower than-25 ℃. However, once the secondary refrigerant in the cold accumulation water tank is lower than-25 ℃, the single two-stage screw compressor can be loaded, and the refrigerating system of the utility model can always run in a high energy efficiency ratio state.
The secondary refrigerant used in the indirect refrigeration system of the utility model is potassium formate-pentaerythritol-water dispersible polyisocyanate-water system secondary refrigerant. The specific component of the secondary refrigerant is formic acid with the mass ratio of 30-45 percentPotassium, 15-27% of pentaerythritol, 10-18% of water dispersible polyisocyanate, 0-3% of propylene glycol, 0-2% of sodium dehydroacetate, 0-2% of potassium sorbate and 15-25% of distilled water. The density of the secondary refrigerant is 1.04-1.36 g/cm3The specific heat is 0.56-0.746 cal/g DEG C, the viscosity is 2.9-15.9 mPa & s (cp), the thermal conductivity is 0.21-0.47W/m.K, the boiling point is more than 150 ℃, the freezing point is less than-60 ℃, and no flash point exists. The cold-carrying agent used by the utility model has the advantages of non-corrosiveness and lower freezing point compared with the glycol cold-carrying agent, the temperature of the ice surface is controlled to be-10 ℃ to-15 ℃ more easily, and the ice surface with higher quality is obtained with lower energy consumption to help athletes to improve the performance.
Compared with the prior art, the utility model discloses a key technology point includes following several aspects:
1. the utility model discloses in use the cold-storage pond as secondary refrigerant cold-storage device to can adjust refrigerating unit's start time to the power consumption price valley time quantum, thereby reduced whole refrigerating system operation cost.
2. The utility model discloses in use unit doublestage compressor as main refrigerating unit, can guarantee that unit doublestage compressor is in the normal loading operation of low temperature section all the time under the effect in cold-storage pond, utilize the advantage of unit doublestage compressor efficiency relative altitude, effectual reduction refrigerating unit's consumption.
3. The utility model discloses in used the secondary refrigerant who has contained water dispersible polyisocyanate, this secondary refrigerant's use makes the secondary refrigerant can be cooled to below low temperature-40 ℃ to the cold-storage of more intensity has been realized.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, together with the description of embodiments of the invention, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram of a refrigeration system for an artificial ice rink according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail with reference to the accompanying drawings.
Fig. 1 is according to the utility model discloses a refrigerating system structure schematic diagram for artifical ice rink, the utility model discloses a refrigerating system for artifical ice rink includes main refrigerating unit 1, evaporative condenser 2, main refrigerating unit heat exchanger 3, cold-storage pond 4, cryopump 5, circulating pump 6 and cold calandria 7. The main refrigerating unit 1 adopts a single-unit two-stage compressor, and the refrigerant adopts Freon R404. The heat exchanger 3 of the main refrigerating unit adopts a coiled pipe type heat exchanger made of 16Mn steel pipes. The main refrigerating unit heat exchanger 3 is immersed in the cold accumulation water tank 4, the inner layer of the cold accumulation water tank 4 is a 0.5mm carbon steel plate, the outer layer is a 300mm polyurethane heat insulation layer, and the whole capacity is 80m3In which a refrigerant is loaded. According to the design requirement of the ice layer, the temperature difference between the upper layer and the lower layer of the ice layer is 2 ℃, the temperature difference between the inner part and the outer part of the cold exhaust pipe is set to be 5 ℃, the temperature of the ice surface is required to be reduced to-10 ℃ to-15 ℃, and the temperature of the secondary refrigerant is required to be reduced to below-22 ℃. In order to ensure the smooth loading of the single-machine two-stage compressor, the temperature of the secondary refrigerant is reduced to-40 ℃. The cold discharge pipe 7 can adopt a stainless steel pipeline or low-temperature-resistant engineering plastic HDPE 100. The ice rink includes concrete layer, frozen layer and ice sheet, cold row pipe 7 lays in the frozen layer. The working process of the refrigeration system is as follows: in the electricity price valley period at night, the main refrigerating unit 1 refrigerates the secondary refrigerant in the cold storage water tank 4 to reduce the temperature of the secondary refrigerant to-40 ℃, and then the main refrigerating unit 1 is shut down. In the daytime, the refrigerating pump 5 is started to inject low-temperature secondary refrigerant into the cold discharge pipe 7, so that the secondary refrigerant circulates between the cold discharge pipe 7 and the cold storage water tank 4, when the ice surface temperature reaches minus 15 ℃, the refrigerating pump 5 is closed, the circulating pump 6 is started, the secondary refrigerant only circulates in the cold discharge pipe 7, and when the ice surface temperature is higher than minus 10 ℃, the refrigerating pump 5 is started again. Meanwhile, when the temperature of the secondary refrigerant is higher than-25 ℃, the refrigerating pump 5 is closed, the circulating pump 6 is started, the state is maintained until the electricity price valley period comes, and the main refrigerating unit 1 is started.
The above, only be the embodiment of the present invention, the protection scope of the present invention is not limited thereto, and any technical personnel familiar with the technology are in the technical specification of the present invention, to the modification or replacement of the present invention, all should be within the protection scope of the present invention.
Claims (5)
1. A refrigeration system for an artificial ice rink is characterized by comprising a main refrigeration unit (1), an evaporative condenser (2), a main refrigeration unit heat exchanger (3), a cold storage water pool (4), a freezing pump (5), a circulating pump (6) and a cold discharge pipe (7); the main refrigerating unit (1) adopts a single-unit two-stage compressor, and the refrigerant adopts Freon R404; the main refrigerating unit heat exchanger (3) is completely immersed in the secondary refrigerant of the cold storage water tank (4); the cold discharge pipes (7) are laid in a sand layer of the ice rink.
2. Refrigeration system for artificial ice rink according to claim 1, characterized in that the inner layer of the cold-storage water tank (4) is 0.5mm carbon steel plate, the outer layer is 300mm polyurethane heat-insulating layer, and the whole capacity is 80m3And the secondary refrigerant contains water dispersible polyisocyanate.
3. Refrigeration system for an artificial ice rink according to claim 1, characterized in that the coolant is cooled down to-40 ℃ by the main refrigeration unit (1).
4. Refrigeration system for an artificial ice rink according to claim 1, characterized in that when the ice surface temperature reaches-15 ℃, the freezer pump (5) is switched off and the circulation pump (6) is switched on, while the coolant circulates only in the cold drain pipe (7).
5. Refrigeration system for an artificial ice rink according to claim 1, characterized in that the main refrigeration unit (1) is activated only during the electricity price valley period, the other periods being in the off state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920392932.3U CN209991629U (en) | 2019-03-27 | 2019-03-27 | Refrigerating system for artificial ice rink |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920392932.3U CN209991629U (en) | 2019-03-27 | 2019-03-27 | Refrigerating system for artificial ice rink |
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| CN209991629U true CN209991629U (en) | 2020-01-24 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111665880A (en) * | 2020-06-28 | 2020-09-15 | 中互海州(深圳)商业设施有限公司 | Ice rink temperature control system and ice rink temperature control method |
| CN113959134A (en) * | 2021-11-25 | 2022-01-21 | 哈尔滨光大冰场制造有限公司 | Novel process for collecting and refrigerating natural cold source of refrigerating ice field |
-
2019
- 2019-03-27 CN CN201920392932.3U patent/CN209991629U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111665880A (en) * | 2020-06-28 | 2020-09-15 | 中互海州(深圳)商业设施有限公司 | Ice rink temperature control system and ice rink temperature control method |
| CN113959134A (en) * | 2021-11-25 | 2022-01-21 | 哈尔滨光大冰场制造有限公司 | Novel process for collecting and refrigerating natural cold source of refrigerating ice field |
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