CN218348986U - Heat exchange ice melting device and water source heat pump refrigerating system based on same - Google Patents
Heat exchange ice melting device and water source heat pump refrigerating system based on same Download PDFInfo
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- CN218348986U CN218348986U CN202222616131.5U CN202222616131U CN218348986U CN 218348986 U CN218348986 U CN 218348986U CN 202222616131 U CN202222616131 U CN 202222616131U CN 218348986 U CN218348986 U CN 218348986U
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Abstract
The utility model discloses a heat transfer ice-melt device and based on device's water source heat pump refrigerating system. The heat exchange ice melting device comprises an evaporator water tank internally provided with an evaporator, and a refrigerant supply and return automatic valve is respectively arranged on a refrigerant supply pipe and a refrigerant return pipe of the evaporator. The water inlet pipe is provided with an automatic water inlet adjusting valve. The bottom end of the water outlet positioning pipe is connected with the water outlet of the water tank of the evaporator, and the top end of the water outlet positioning pipe is connected with the water outlet pipe. The evaporator water tank is also provided with an overflow port type ice melting water outlet, and the lower edge position of the ice melting water outlet is higher than the top end position of the water outlet positioning pipe. The system absorbs two parts of sensible heat and latent heat in low-temperature water through each heat exchange and ice melting device, and the sensible heat and the latent heat are released into a hot water tank through a condenser of a refrigerating unit, so that the efficiency of a heat pump is realized. Because a large amount of latent heat of critical ice point water is absorbed, the system greatly reduces the water consumption of the evaporator, and the purposes of automatic ice melting and continuous heating are realized by the structural design of the heat exchange ice melting device and the operation control of the refrigerating system.
Description
Technical Field
The utility model relates to a heat transfer ice-melt device reaches water source heat pump refrigerating system based on this heat transfer ice-melt device.
Background
The existing water source heat pump is mainly divided into a dry type refrigerating system and a flooded type refrigerating system. 1. Dry-type water source heat pump: the evaporator of a general dry-type water source heat pump is a shell-and-tube evaporator, the tube side is refrigerant, and the shell side is water. The superheat degree of return air of the dry type refrigerating system is generally more than 1K, and the superheat degree is generally more than 5K in practical application. Such as: when the water inlet temperature of the evaporator is 5 ℃, the water outlet temperature is 0 ℃, the superheat degree is 5K, and the evaporation temperature is-5 ℃, the evaporator tubes are severely frozen outside, so that the heat exchange efficiency is reduced. If the distance between the tubes of the evaporator is small, the freezing outside the tubes can cause frost heaving damage to the tubes. When the water inlet temperature of the evaporator is lower and approaches to the freezing point, the existing water source heat pump cannot normally operate, the heating effect can be guaranteed only by continuously melting ice, and the heating cannot be normally and continuously performed during ice melting. 2. Flooded (wet) water source heat pump: the evaporator of a common flooded water source heat pump is a shell-and-tube evaporator, the tube side is water, and the shell side is a refrigerant. The degree of superheat of return air of the wet refrigeration system is generally more than or equal to 0K, and the degree of superheat is generally more than or equal to 0K in practical application. Such as: when the water inlet temperature of the evaporator is 5 ℃, the water outlet temperature is 0 ℃, the superheat degree is 0K, and the evaporator has a corresponding heat exchange area, the evaporation temperature is-3 ℃, and at the moment, the tube array of the evaporator is also frozen, so that the heat exchange efficiency is reduced. Freezing in the tube array can cause frost heaving damage to the tube array. When the inlet water temperature of the evaporator is low and is close to the freezing point, the existing flooded water source heat pump cannot normally operate, the heating effect can be guaranteed only by continuously melting ice, but the heating cannot be normally and continuously performed during the ice melting. In addition, the temperature difference between inlet water and outlet water of a traditional water source heat pump is generally 5 ℃, an evaporator mainly absorbs heat from sensible heat of the inlet water, and the water consumption is large because the liquid specific heat capacity of water is 1Kcal/kg. Therefore, the water source heat pump cannot be adopted under the condition that some water resources are not sufficient enough.
On the other hand, the evaporator of the existing water source heat pump refrigerating system is usually deiced by adopting a scraper mode, so that the structure is complex, and the maintenance cost is high.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem of providing a heat exchange ice melting device and a water source heat pump refrigerating system based on the same, firstly, the heat exchange ice melting device has the functions of automatic ice melting and ice discharging; secondly, the water source heat pump refrigerating system has a continuous heating function and has the characteristic of greatly saving water.
The technical scheme of the utility model as follows:
heat transfer ice-melt device, including the evaporator water tank of internally mounted with the evaporimeter, the evaporimeter is connected with refrigerant return pipe and refrigerant supply pipe respectively, refrigerant return pipe and refrigerant supply pipe are used for connecting refrigerating unit, the evaporator water tank is connected with inlet tube and outlet pipe, its characterized in that respectively: the refrigerant supply pipe is provided with a refrigerant supply automatic valve, and the refrigerant return pipe is provided with a refrigerant return automatic valve; the water inlet pipe is provided with an automatic water inlet adjusting valve; the water outlet pipe is connected with the water outlet of the evaporator water tank through a water outlet positioning pipe; the bottom end of the water outlet positioning pipe is connected with the water outlet of the water tank of the evaporator, and the top end of the water outlet positioning pipe is connected with the water outlet pipe; the evaporator water tank is also provided with an ice melting water outlet in the form of an overflow port, and the lower edge of the ice melting water outlet is higher than the top end of the water outlet positioning pipe.
Preferably, the heat exchange ice melting device further comprises a water outlet emptying pipe, the bottom end of the water outlet emptying pipe is connected with the top end of the water outlet positioning pipe, and the top end of the water outlet emptying pipe is higher than the top of the evaporator water tank.
Preferably, one side of the evaporator water tank is also provided with an ice melting drainage tank for receiving water and ice overflowing from the ice melting drainage port.
Preferably, the heat exchange ice melting device further comprises a temperature sensor for detecting the water temperature at the water outlet of the evaporator water tank.
Water source heat pump refrigerating system based on heat transfer ice-melt device, its characterized in that: the refrigerating system comprises a refrigerating unit and more than two heat exchange ice melting devices with the same structure; the refrigerating unit is respectively connected with a refrigerant inlet and outlet pipeline of the heat exchange ice melting device through a refrigerant supply main pipe and a refrigerant return main pipe; the refrigerating system also comprises a constant-pressure water supply source, and the constant-pressure water supply source is respectively connected with water tank water inlet pipes of the heat exchange ice melting device through a water inlet main pipe; the refrigeration system further comprises a main drainage pipe, and the main drainage pipe is respectively connected with a drainage pipeline and an ice drainage pipeline of the heat exchange ice melting device.
Preferably, the refrigerant return manifold is provided with a pressure sensor.
The utility model has the positive effects that:
1. the heat exchange ice melting device has the functions of automatic ice melting and ice discharging: when the evaporator needs to melt ice, the refrigerant supply and return automatic valve of the heat exchange ice melting device is automatically closed, the inflow flow is increased by adjusting the inflow automatic adjusting valve, at the moment, low-temperature water at the critical freezing point at the lower part of the water tank is discharged out of the water tank through the water outlet pipe, the temperature of the water in the water tank is higher than the freezing point, the pressure in the evaporator rises, and the temperature of the refrigerant is higher than the freezing point, so that the ice on the evaporator is quickly separated. Since the density of ice is less than that of water, the ice that falls off but does not melt floats to the surface of the water. When the water inlet automatic regulating valve automatically regulates and increases the water quantity, the water outlet pipe can only meet the water outlet flow during refrigeration and heat exchange, the water surface rises to the ice melting drainage outlet, water is drained out of the water tank from the ice melting drainage outlet, and meanwhile, ice floating on the water surface is drained out of the water tank to finish ice drainage.
2. Automatic alternate ice melting and continuous heating: the utility model discloses a water source heat pump refrigerating system adopts the heat transfer ice-melt device that possesses automatic ice-melt and ice discharge function more than two. After one heat exchange ice melting device finishes melting ice, the water inlet automatic regulating valve is regulated to reduce the water inlet flow, so that the water level is lower than the ice melting water outlet, the refrigerant supply and return automatic valve is automatically opened, and the heat exchange ice melting device restarts heat exchange. When one heat exchange ice melting device carries out ice melting, other heat exchange ice melting devices work normally, the heat exchange amount can meet the requirement of the refrigerating load of the refrigerating unit, and when the ice melting of the heat exchange ice melting device is completed, the ice melting is carried out on the next group of heat exchange ice melting devices. The heat exchange ice melting device melts ice alternately in turn, so that the water source heat pump achieves the purpose of continuous heating.
3. The water consumption is reduced: the utility model discloses can be through the evaporating temperature of real-time supervision evaporimeter, control refrigerating unit output load, through the leaving water temperature of real-time supervision evaporimeter water tank, adjust the inflow of evaporimeter, make the partial water in the evaporimeter water tank keep at critical freezing point state. The evaporator absorbs a great deal of latent heat of water with critical freezing point, and the technical aim of greatly reducing the water consumption of the evaporator is achieved. Because the utility model discloses unique structure and the control mode that well heat transfer ice-melt device possessed (make the partial water of water tank be in the critical freezing point state through control evaporating temperature), the latent heat that the water of freezing point temperature changed into the ice release of freezing point temperature is the liquid water and every reduces 80 times of the sensible heat of 1 ℃ release, the usable critical freezing point latent heat of the device 50%, consequently only need 1/40 water yield in the past can make water source heat pump normal work to satisfy the water source not enough or the temperature crosses the demand that the area used water source heat pump excessively.
The utility model discloses be particularly useful for the evaporimeter temperature of intaking is a little higher than freezing point temperature, for example evaporimeter temperature of intaking 0-5 ℃ water source heat pump system.
Drawings
Fig. 1 is a schematic view of the structure and working principle of the embodiment of the water source heat pump refrigeration system of the present invention;
fig. 2 is a structure and a working schematic diagram of an embodiment of the heat exchange ice melting device of the present invention.
1. The system comprises a hot water pool, 2, a hot water pump, 3, a refrigerating unit, 4, a refrigerant return pipe, 5, a refrigerant supply main pipe, 6, a pressure sensor, 7, a heat exchange and ice melting device A,7-1, a refrigerant return automatic valve, 7-2, a refrigerant supply automatic valve, 7-3, a refrigerant return pipe, 7-4, a refrigerant supply pipe, 7-5, a water outlet emptying pipe, 7-6, a temperature sensor, 7-7, a water outlet positioning pipe, 7-8, a water outlet pipe, 7-9, an ice melting water outlet, 7-10, a water inlet adjusting automatic valve, 7-11, an ice melting water drainage box, 7-12, a water inlet pipe, 7-13, an ice melting water drainage pipe, 7-14, an evaporator, 7-15, an evaporator water tank, 8, a B heat exchange device, 9, a C heat exchange device, 10, a constant pressure water supply source, 11, a drainage main pipe, 12 and a water inlet main pipe.
Detailed Description
The present invention will be further described with reference to the following examples and the accompanying drawings.
Embodiment I, embodiment of heat exchange ice melting device
As shown in fig. 2, the heat exchange ice melting device of the embodiment includes an evaporator water tank 7-15 with an evaporator 7-14 installed inside. The evaporators 7-14 are respectively connected with a refrigerant return pipe 7-3 and a refrigerant supply pipe 7-4, and the refrigerant return pipe 7-3 and the refrigerant supply pipe 7-4 are used for being connected with a refrigerating unit. The evaporator water tank 7-15 is respectively connected with a water inlet pipe 7-12 and a water outlet pipe 7-8.
The refrigerant supply pipe 7-4 is provided with a refrigerant supply automatic valve 7-2, and the refrigerant return pipe 7-3 is provided with a refrigerant return automatic valve 7-1. And the water inlet pipe 7-12 is provided with a water inlet adjusting automatic valve 7-10. The water outlet pipe 7-8 is connected with the water outlet of the evaporator water tank 7-15 through a water outlet positioning pipe 7-7. The bottom end of the water outlet positioning pipe 7-7 is connected with the water outlet of the evaporator water tank 7-15, and the top end is connected with the water outlet pipe 7-8. The heat exchange ice melting device further comprises a water outlet emptying pipe 7-5, the bottom end of the water outlet emptying pipe 7-5 is connected with the top end of the water outlet positioning pipe 7-7, and the top end of the water outlet emptying pipe 7-5 is higher than the top of the evaporator water tank 7-15.
The evaporator water tank 7-15 is also provided with an overflow port type ice melting water outlet 7-9, and the lower edge position of the ice melting water outlet 7-9 is higher than the top end position of the water outlet positioning pipe 7-7.
And one side of the evaporator water tank 7-15 is also provided with an ice melting drainage tank 7-11 for receiving water and ice overflowing from the ice melting drainage port 7-9, and the ice melting drainage tank 7-11 is connected with an ice melting drainage pipe 7-13.
The embodiment also comprises a temperature sensor 7-6 for detecting the water temperature at the water outlet of the evaporator water tank 7-15. The temperature sensor 7-6 can be arranged on the water outlet positioning pipe 7-7.
Second embodiment, embodiment of water source heat pump refrigeration system
As shown in fig. 1, the water source heat pump refrigeration system of the present embodiment includes a refrigeration unit 3 and three heat exchange ice melting devices with the same structure, where the three heat exchange ice melting devices are a heat exchange ice melting device a 7, a heat exchange ice melting device B8, and a heat exchange ice melting device C9. The refrigerating unit 3 is connected with a hot water tank 1 through a pipeline and a hot water pump 2. The refrigerating unit 3 is also connected with refrigerant inlet and outlet pipelines of the three heat exchange ice melting devices through a refrigerant supply header pipe 5 and a refrigerant return header pipe 4, such as a refrigerant supply pipe 7-4 and a refrigerant return pipe 7-3 of the heat exchange ice melting device A7. Wherein the refrigerant return manifold 4 is provided with a pressure sensor 6. The present embodiment further includes a constant pressure water supply 10, the constant pressure water supply 10 being connected to a water inlet manifold 12. The water inlet main pipe 12 is respectively connected with water tank water inlet pipes of the three heat exchange ice melting devices, such as the water inlet pipes 7-12 of the heat exchange ice melting device A7. The embodiment further comprises a main drainage pipe 11, wherein the main drainage pipe 11 is respectively connected with drainage pipelines and ice discharge pipelines of the three heat exchange ice melting devices, such as water outlet pipes 7-8 and ice melting drainage pipes 7-13 of the heat exchange ice melting device A7.
When the water source heat pump works, the water inlet adjusting automatic valve 7-10 is opened, low-temperature cold water flows into the evaporator water tank 7-15 through the water inlet pipe 7-12, exchanges heat with a refrigerant in the evaporator 7-14 and then flows to the water discharge header pipe 11 through the water outlet positioning pipe 7-7 and the water outlet pipe 7-8 in sequence. And opening the refrigerant supply automatic valve 7-2 and the refrigerant return automatic valve 7-1, allowing the refrigerant from the refrigeration unit 3 to enter the evaporator 7-14 through the refrigerant supply header pipe 5 and the refrigerant supply pipe 7-4 in sequence, exchanging heat with the water in the evaporator water tank 7-15, and returning the refrigerant to the refrigeration unit 3 through the refrigerant return pipe 7-3 and the refrigerant return header pipe 4 in sequence.
After the operation is carried out for a period of time, if the evaporator 7-14 of the heat exchange ice melting device A7 is frozen, the refrigerant supply automatic valve 7-2 and the refrigerant return automatic valve 7-1 are automatically closed, and the evaporator 7-14 stops heat exchange. The water inflow is automatically adjusted and increased through the water inflow automatic adjusting valve 7-10. And the water with the critical freezing point sequentially passes through the water outlet positioning pipe 7-7 and the water outlet pipe 7-8 to be discharged out of the evaporator water tank 7-15 and then is discharged out of the system through the water discharge header pipe 11.
When the temperature of the water detected by the temperature sensor 7-6 rises to the temperature of the inlet water, the pressure in the evaporator 7-14 rises, the temperature of the refrigerant rises, when the temperature of the refrigerant exceeds the freezing point temperature, the ice layer quickly falls off from the evaporator 7-14, and because the flow of the outlet pipe 7-8 only can meet the smaller inlet water flow of the evaporator during refrigeration, the water level in the evaporator water tank 7-15 continues to rise because the inlet water automatic regulating valve 7-10 can automatically regulate and increase the inlet water flow, when the temperature rises to the position of the ice melting water outlet 7-9, the fallen ice layer overflows into the ice melting water drainage box 7-11 through the ice melting water outlet 7-9, and is drained to the water drainage main pipe 11 through the thicker ice melting water drainage pipe 7-13 and is drained out of the system.
After the ice melting of the evaporator 7-14 is finished, the water inlet automatic regulating valve 7-10 automatically regulates the water inlet amount and restores to the flow rate in the refrigeration heat exchange state, the refrigerant supply automatic valve 7-2 and the refrigerant return automatic valve 7-1 are automatically opened, and the evaporator 7-14 exchanges heat again. And at the moment, if the evaporators of the heat exchange ice melting device B8 or the heat exchange ice melting device C9 are frozen, the ice is automatically melted in turn according to the flow. Because only one evaporator melts ice at each time, the heat exchange quantity of other evaporators can meet the requirement of the refrigeration load of the water source heat pump, and the water source heat pump can continuously heat at full load while melting ice.
Water provided by a constant-pressure water supply source 10 enters evaporator water tanks of all refrigerating capacity heat exchange devices through a water inlet main pipe 12, the water is cooled through the evaporators, critical freezing point low-temperature water is located at the middle lower part of the evaporator water tanks, the evaporation temperature of the evaporators is monitored in real time through a pressure sensor 6, the output load of a refrigerating unit 3 is controlled, the water outlet temperature in each evaporator water tank is monitored in real time through a temperature sensor, the water inlet flow adjusted by an automatic water inlet adjusting valve is controlled, and partial water in the evaporator water tanks is kept in a critical freezing point state. The evaporator absorbs a large amount of latent heat of water with critical freezing point, and the water consumption of the evaporator is greatly reduced. Because water has a large amount of latent heat under the state of a critical freezing point, the water source heat pump can work normally only by a small amount of low-temperature water.
The system absorbs two parts of sensible heat and latent heat in low-temperature water through each heat exchange and ice melting device, and the sensible heat and the latent heat are released into a hot water tank through a condenser of a refrigerating unit, so that the efficiency of a heat pump is realized.
In conclusion, the system can continuously heat when the evaporator melts ice, and also solves the problem that a water source heat pump cannot be used in many areas due to insufficient water source and low water temperature.
Claims (6)
1. Heat exchange ice-melt device, including evaporator water tank (7-15) of internally mounted evaporator (7-14), evaporator (7-14) are connected with refrigerant return pipe (7-3) and refrigerant supply tube (7-4) respectively, refrigerant return pipe (7-3) and refrigerant supply tube (7-4) are used for connecting the refrigerating unit, evaporator water tank (7-15) are connected with inlet tube (7-12) and outlet pipe (7-8) respectively, its characterized in that: a refrigerant supply automatic valve (7-2) is arranged on the refrigerant supply pipe (7-4), and a refrigerant return automatic valve (7-1) is arranged on the refrigerant return pipe (7-3); the water inlet pipe (7-12) is provided with an automatic water inlet adjusting valve (7-10); the water outlet pipe (7-8) is connected with the water outlet of the evaporator water tank (7-15) through a water outlet positioning pipe (7-7); the bottom end of the water outlet positioning pipe (7-7) is connected with a water outlet of an evaporator water tank (7-15), and the top end of the water outlet positioning pipe is connected with the water outlet pipe (7-8); the evaporator water tank (7-15) is also provided with an ice melting water outlet (7-9) in the form of an overflow port, and the lower edge of the ice melting water outlet (7-9) is higher than the top end of the water outlet positioning pipe (7-7).
2. The heat exchange ice melting device according to claim 1, wherein: the heat exchange ice melting device further comprises a water outlet emptying pipe (7-5), the bottom end of the water outlet emptying pipe (7-5) is connected with the top end of the water outlet positioning pipe (7-7), and the top end of the water outlet emptying pipe (7-5) is higher than the top of the evaporator water tank (7-15).
3. The heat exchange ice melting device according to claim 1, characterized in that: and one side of the evaporator water tank (7-15) is also provided with a deicing water drainage tank (7-11) for receiving water and ice overflowing from the deicing water drainage port (7-9).
4. The heat exchange ice melting device according to claim 1, wherein: the heat exchange ice melting device also comprises a temperature sensor (7-6) for detecting the water temperature at the water outlet of the evaporator water tank (7-15).
5. The water source heat pump refrigerating system of the heat exchange ice melting device according to any one of claims 1 to 4, characterized in that: the refrigerating system comprises a refrigerating unit (3) and more than two heat exchange ice melting devices with the same structure; the refrigerating unit (3) is respectively connected with a refrigerant inlet and outlet pipeline of the heat exchange ice melting device through a refrigerant supply main pipe (5) and a refrigerant return main pipe (4); the refrigeration system also comprises a constant-pressure water supply source (10), and the constant-pressure water supply source (10) is respectively connected with water inlet pipes of a water tank of the heat exchange ice melting device through a water inlet main pipe (12); the refrigeration system further comprises a main drainage pipe (11), and the main drainage pipe (11) is respectively connected with a drainage pipeline and an ice discharge pipeline of the heat exchange ice melting device.
6. The water source heat pump refrigeration system of claim 5 wherein: and a pressure sensor (6) is arranged on the refrigerant return header pipe (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222616131.5U CN218348986U (en) | 2022-10-04 | 2022-10-04 | Heat exchange ice melting device and water source heat pump refrigerating system based on same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222616131.5U CN218348986U (en) | 2022-10-04 | 2022-10-04 | Heat exchange ice melting device and water source heat pump refrigerating system based on same |
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| Publication Number | Publication Date |
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| CN218348986U true CN218348986U (en) | 2023-01-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202222616131.5U Active CN218348986U (en) | 2022-10-04 | 2022-10-04 | Heat exchange ice melting device and water source heat pump refrigerating system based on same |
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| CN (1) | CN218348986U (en) |
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- 2022-10-04 CN CN202222616131.5U patent/CN218348986U/en active Active
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