CN115507413A - Double-medium complementary heat pump device suitable for severe cold area - Google Patents
Double-medium complementary heat pump device suitable for severe cold area Download PDFInfo
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- CN115507413A CN115507413A CN202211036265.8A CN202211036265A CN115507413A CN 115507413 A CN115507413 A CN 115507413A CN 202211036265 A CN202211036265 A CN 202211036265A CN 115507413 A CN115507413 A CN 115507413A
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- heat exchanger
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- heat pump
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D15/00—Other domestic- or space-heating systems
- F24D15/04—Other domestic- or space-heating systems using heat pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/02—Heat pumps of the compression type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/06—Heat pumps characterised by the source of low potential heat
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
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- Combustion & Propulsion (AREA)
- Other Air-Conditioning Systems (AREA)
Abstract
The invention discloses a double-medium complementary heat pump device suitable for severe cold areas, which comprises a user side heat exchanger, wherein one side of the connecting end of the user side heat exchanger is communicated with an expansion valve, the other side of the connecting end of the user side heat exchanger is communicated with a compressor, the free ends of the expansion valve and the compressor are communicated with a selective heat exchanger set, and the selective heat exchanger set, the expansion valve, the user side heat exchanger and the compressor are connected in series to form a closed loop. According to the invention, the air source and the water source are jointly utilized and are complementary in a synergistic manner, so that the operation energy efficiency can be improved compared with the condition that air is used as the only heat source; compared with water as the only heat source, the running cost can be reduced. The invention realizes the complementary operation of double media of one unit, meets the requirement of stable heating in the heating season of the heat pump unit and improves the energy utilization rate. The invention avoids the cop value reduction of the ultralow temperature operation of the heat pump, ensures that the heat pump unit can operate in all seasons in the heating season, and improves the operation energy efficiency.
Description
Technical Field
The invention belongs to the technical field of heat source equipment, and particularly relates to a double-medium complementary heat pump device suitable for severe cold areas.
Background
The air source heat pump unit absorbs heat in outdoor air to realize heating in winter, and has the advantages of wide application range, low operation cost and outstanding energy-saving effect, but the operation effect is easily influenced by the ambient temperature and the humidity.
In the heating season, when the outdoor temperature is lower, the air source heat pump heats at low temperature, and the operation efficiency is low; with the continuous drop of outdoor temperature, even the operation can not be performed. When the outdoor air humidity is high, the surface of the air source heat pump evaporator is easy to frost, the heat exchange capacity is reduced, and even the equipment is damaged.
In order to realize the high-energy-efficiency operation of the air source heat pump in the whole heating season and avoid the condition that the heat pump cannot be started or even damages equipment in extreme weather, the double-medium energy complementary heat pump device capable of stably and efficiently operating in the whole heating season in severe cold areas is provided.
Disclosure of Invention
The invention is provided for solving the problems in the prior art, and aims to provide a double-medium complementary heat pump device suitable for severe cold areas.
The technical scheme of the invention is as follows: the heat pump device comprises a user side heat exchanger, wherein one side of a connecting end of the user side heat exchanger is communicated with an expansion valve, the other side of the connecting end of the user side heat exchanger is communicated with a compressor, free ends of the expansion valve and the compressor are communicated with a selective heat exchanger unit, and the selective heat exchanger unit, the expansion valve, the user side heat exchanger and the compressor are connected in series to form a closed loop.
The selective heat exchanger unit comprises an air cooling branch and a water cooling branch, and the air cooling branch and the water cooling branch are connected in parallel.
The air cooling branch of the selective ventilation type heat exchanger unit comprises an air cooling type heat exchanger, and two connecting ends of the air cooling type heat exchanger are communicated with the expansion valve and the compressor.
The water-cooling branch of the selective heat exchanger unit comprises a water-cooling heat exchanger, and two connecting ends of the water-cooling heat exchanger are communicated with an expansion valve and a compressor.
And the heat exchange connecting end of the water-cooled heat exchanger is respectively communicated with low-temperature water source water supply and low-temperature water source return water.
And the heat exchange connecting end of the air-cooled heat exchanger is communicated with a fan of the outdoor air-cooled heat exchanger.
And the heat exchange connecting end of the user side heat exchanger is communicated with the user side backwater and the user side water supply.
The selective-pass type heat exchanger unit comprises a three-way valve I, one end of the three-way valve I is communicated with the expansion valve, and the other two ends of the three-way valve I are communicated with the air-cooled heat exchanger and the water-cooled heat exchanger.
The selective heat exchanger unit further comprises a three-way valve II, one end of the three-way valve II is communicated with the compressor, and the other two ends of the three-way valve II are communicated with the air-cooled heat exchanger and the water-cooled heat exchanger.
No. I three-way valve, no. II three-way valve's pipe diameter is the same.
The invention has the following beneficial effects:
according to the invention, two heat sources of an air source and a water source are jointly utilized and are cooperated and complemented, so that the operation energy efficiency can be improved compared with the case that air is used as the only heat source; compared with water as the only heat source, the running cost can be reduced. The invention realizes the complementary operation of double media of one unit, meets the requirement of stable heating in the heating season of the heat pump unit and improves the energy utilization rate.
The air-cooled heat exchanger and the water-cooled heat exchanger are alternately used according to the temperature change of the outdoor environment, and the air-cooled heat exchanger is used for extracting heat in air when the temperature of outdoor air is higher in the initial stage and the final stage of heating. In the middle stage of heating, when the outdoor air temperature is low, the water-cooled heat exchanger is used for extracting the heat in the water source. The invention avoids the cop value reduction of the ultralow temperature operation of the heat pump, ensures that the heat pump unit can operate in all seasons in the heating season, and improves the operation energy efficiency.
According to the invention, the water-cooled heat exchanger is connected in parallel to the air-cooled heat exchanger side of the heat pump unit, so that the problem that the unit surface frosts and even cannot normally operate when the outdoor environment temperature is lower in the middle stage of heating of the air source heat pump is solved. The heat pump set is guaranteed to be heated uninterruptedly and stably in the whole heating season, and the heating capacity of the heat pump set is improved while the operation stability of the system is guaranteed.
Drawings
FIG. 1 is a schematic connection diagram of the present invention;
wherein:
1. air-cooled heat exchanger 2 water-cooled heat exchanger
3. Expansion valve 4 compressor
5. Electromagnetic valve A at air cooling side of user side heat exchanger 6
7. Air-cooled side electromagnetic valve B8 water-cooled side electromagnetic valve A
9. Water cold side electromagnetic valve B10 refrigerant copper pipe
11. Outdoor forced air cooling heat exchanger fan.
Detailed Description
The invention is described in detail below with reference to the figures and examples:
as shown in fig. 1, a heat pump device of a double-medium complementary type adapted to severe cold region includes a user side heat exchanger 5, one side of a connection end of the user side heat exchanger 5 is communicated with an expansion valve 3, the other side of the connection end of the user side heat exchanger 5 is communicated with a compressor 4, free ends of the expansion valve 3 and the compressor 4 are communicated with a selective heat exchanger set, and the selective heat exchanger set, the expansion valve 3, the user side heat exchanger 5 and the compressor 4 are connected in series to form a closed loop.
The selective heat exchanger unit comprises an air cooling branch and a water cooling branch, and the air cooling branch and the water cooling branch are connected in parallel.
The air cooling branch of the selective heat exchanger unit comprises an air cooling type heat exchanger 1, and two connecting ends of the air cooling type heat exchanger 1 are communicated with an expansion valve 3 and a compressor 4.
The water-cooling branch of the selective heat exchanger unit comprises a water-cooling heat exchanger 2, and two connecting ends of the water-cooling heat exchanger 2 are communicated with an expansion valve 3 and a compressor 4.
And the heat exchange connecting end of the water-cooled heat exchanger 2 is respectively communicated with low-temperature water source water supply and low-temperature water source backwater.
And the heat exchange connecting end of the air-cooled heat exchanger 1 is communicated with an outdoor air-cooled heat exchanger fan 11.
And the heat exchange connecting end of the user side heat exchanger 5 is communicated with the user side backwater and the user side water supply.
The selective-pass type heat exchanger unit comprises a three-way valve I, one end of the three-way valve I is communicated with an expansion valve 3, and the other two ends of the three-way valve I are communicated with an air-cooled heat exchanger 1 and a water-cooled heat exchanger 2.
The selective heat exchanger unit further comprises a three-way valve II, one end of the three-way valve II is communicated with the compressor 4, and the other two ends of the three-way valve II are communicated with the air-cooled heat exchanger 1 and the water-cooled heat exchanger 2.
No. I three-way valve, no. II three-way valve's pipe diameter is the same.
Specifically, an air cooling side electromagnetic valve A6 and an air cooling side electromagnetic valve B7 are arranged in the air cooling branch, and the air cooling side electromagnetic valve A6 and the air cooling side electromagnetic valve B7 are located on two sides of the air cooling type heat exchanger 11.
Specifically, the air-cooling side solenoid valve A6 and the air-cooling side solenoid valve B7 are positioned between the three-way valve I and the three-way valve II.
Specifically, the air cooling side electromagnetic valve A6 and the air cooling side electromagnetic valve B7 are synchronously controlled to be opened and closed simultaneously.
Specifically, a water-cooling side electromagnetic valve A8 and a water-cooling side electromagnetic valve B9 are arranged in the water-cooling branch, and the water-cooling side electromagnetic valve A8 and the water-cooling side electromagnetic valve B9 are located on two sides of the water-cooled heat exchanger 2.
Specifically, the water-cooling side electromagnetic valve A8 and the water-cooling side electromagnetic valve B9 are located between the No. i three-way valve and the No. ii three-way valve.
And the water-cooling side electromagnetic valve A8 and the water-cooling side electromagnetic valve B9 are synchronously controlled to be opened and closed simultaneously.
Yet another embodiment
A heat pump device of a double-medium complementary type adaptive severe cold region comprises a user side heat exchanger 5, one side of a connecting end of the user side heat exchanger 5 is communicated with an expansion valve 3, the other side of the connecting end of the user side heat exchanger 5 is communicated with a compressor 4, free ends of the expansion valve 3 and the compressor 4 are communicated with a gating type heat exchanger unit, and the gating type heat exchanger unit, the expansion valve 3, the user side heat exchanger 5 and the compressor 4 are connected in series to form a closed loop.
The selective heat exchanger unit comprises an air cooling branch and a water cooling branch, and the air cooling branch and the water cooling branch are connected in parallel.
The air cooling branch of the selective heat exchanger unit comprises an air cooling type heat exchanger 1, and two connecting ends of the air cooling type heat exchanger 1 are communicated with an expansion valve 3 and a compressor 4.
The water-cooling branch of the selective heat exchanger unit comprises a water-cooling heat exchanger 2, and two connecting ends of the water-cooling heat exchanger 2 are communicated with an expansion valve 3 and a compressor 4.
And the heat exchange connecting end of the water-cooled heat exchanger 2 is respectively communicated with low-temperature water source water supply and low-temperature water source backwater.
And the heat exchange connecting end of the air-cooled heat exchanger 1 is communicated with an outdoor air-cooled heat exchanger fan 11.
And the heat exchange connecting end of the user side heat exchanger 5 is communicated with the user side backwater and the user side water supply.
The selective-pass type heat exchanger unit comprises a three-way valve I, one end of the three-way valve I is communicated with an expansion valve 3, and the other two ends of the three-way valve I are communicated with an air-cooled heat exchanger 1 and a water-cooled heat exchanger 2.
The selective heat exchanger unit further comprises a three-way valve II, one end of the three-way valve II is communicated with the compressor 4, and the other two ends of the three-way valve II are communicated with the air-cooled heat exchanger 1 and the water-cooled heat exchanger 2.
No. I three-way valve, no. II three-way valve's pipe diameter is the same.
Specifically, an air cooling side electromagnetic valve A6 and an air cooling side electromagnetic valve B7 are arranged in the air cooling branch, and the air cooling side electromagnetic valve A6 and the air cooling side electromagnetic valve B7 are located on two sides of the air cooling type heat exchanger 11.
Specifically, the air-cooling side solenoid valve A6 and the air-cooling side solenoid valve B7 are positioned between the three-way valve I and the three-way valve II.
Specifically, the air cooling side electromagnetic valve A6 and the air cooling side electromagnetic valve B7 are synchronously controlled to be opened and closed simultaneously.
Specifically, a water-cooling side electromagnetic valve A8 and a water-cooling side electromagnetic valve B9 are arranged in the water-cooling branch, and the water-cooling side electromagnetic valve A8 and the water-cooling side electromagnetic valve B9 are located on two sides of the water-cooled heat exchanger 2.
Specifically, the water-cooling side electromagnetic valve A8 and the water-cooling side electromagnetic valve B9 are located between the three-way valve i and the three-way valve ii.
And the water-cooling side electromagnetic valve A8 and the water-cooling side electromagnetic valve B9 are synchronously controlled to be opened and closed simultaneously.
In this embodiment, the air-cooling side electromagnetic valve A6 and the air-cooling side electromagnetic valve B7 are air-cooling control components, and the water-cooling side electromagnetic valve A8 and the water-cooling side electromagnetic valve B9 are water-cooling control components.
The air cooling control assembly and the water cooling control assembly cannot be more than one group in an opening state at the same time.
The working process of the invention is as follows:
when the heating system is operated in heating season, if the ambient temperature of outdoor air is in the normal temperature heating range of the heat pump unit, the air cooling side electromagnetic valve A6 and the air cooling side electromagnetic valve B7 on the side of the air cooling type heat exchanger 1 are opened, and the water cooling side electromagnetic valve A8 and the water cooling side electromagnetic valve B9 on the side of the water cooling type heat exchanger 2 are closed. The high-pressure gaseous refrigerant discharged from the compressor 4 enters the user side heat exchanger 5, the refrigerant releases heat to the user side to be condensed into liquid, the condensate is throttled at the expansion valve 3 to be low-pressure gas-liquid mixture and enters the air-cooled heat exchanger 1, the refrigerant absorbs heat in outdoor air to be gasified, and the gasified low-pressure gaseous refrigerant enters the compressor 4.
In winter, in the initial stage and the final stage of heating, when the outdoor temperature meets the normal-temperature heating requirement of the heat pump unit, the heating coefficient is higher, the heat pump runs at a high cop value, and the air-cooled heat exchanger 1 meets the heat requirement of a user side by absorbing heat in outdoor air.
In the middle stage of heating, along with the continuous reduction of the outdoor environment temperature, if the heat pump unit still uses the air-cooled heat exchanger 1 to operate at a low temperature, after the heat pump unit operates for a period of time for heating, the surface of the air-cooled heat exchanger 1 is frosted to influence the heat transfer performance of the heat exchanger and the heating effect of the system due to the influence of the outdoor air temperature and humidity. With the continuous drop of the outdoor temperature, the heat pump unit can not even run. Therefore, in the middle stage of heating, when the outdoor ambient temperature is lower than the normal temperature heating range of the heat pump, the water cooling side solenoid valve A8 and the water cooling side solenoid valve B9 on the water cooling heat exchanger 2 side are opened, and the air cooling side solenoid valve A6 and the air cooling side solenoid valve B7 on the air cooling heat exchanger side 1 are closed. The high-pressure gaseous refrigerant discharged from the compressor 4 enters the user side heat exchanger 5, the refrigerant releases heat to the user side and is condensed into liquid, the condensate is throttled at the expansion valve to form a low-pressure gas-liquid mixture and enters the water-cooled heat exchanger 2, the refrigerant absorbs the heat in the water to be gasified, and the gasified low-pressure gaseous refrigerant enters the compressor 4. In the middle heating period in winter, when the outdoor temperature does not meet the normal-temperature heating requirement of the heat pump unit, the heat in water is absorbed by the water-cooled heat exchanger, so that the heating stability of the user side is ensured, the heat pump can still keep a higher cop value while the heat requirement of the user side is met, and the operation energy efficiency of the heat pump unit is improved.
According to the invention, two heat sources of an air source and a water source are jointly utilized and are cooperated and complemented, so that the operation energy efficiency can be improved compared with the case that air is used as the only heat source; compared with water as the only heat source, the running cost can be reduced. The invention realizes the complementary operation of double media of one unit, meets the requirement of stable heating in the heating season of the heat pump unit and improves the energy utilization rate.
The air-cooled heat exchanger and the water-cooled heat exchanger are alternately used according to the temperature change of the outdoor environment, and the air-cooled heat exchanger is used for extracting heat in air when the temperature of outdoor air is higher in the initial stage and the final stage of heating. In the middle stage of heating, when the outdoor air temperature is low, the water-cooled heat exchanger is used for extracting heat from the water source. The invention avoids the cop value reduction of the heat pump in ultralow temperature operation, ensures that the heat pump unit can operate in the heating season and all seasons, and improves the operation energy efficiency.
The invention solves the problem that the surface of the air source heat pump unit is frosted even cannot normally run when the outdoor environment temperature is lower in the middle heating period by connecting a set of water-cooled heat exchanger in parallel at the side of the water-cooled heat exchanger of the heat pump unit. The heat pump set is guaranteed to heat uninterruptedly and stably in all heating seasons, and the heating capacity of the heat pump set is improved while the operation stability of the system is guaranteed.
Claims (10)
1. A heat pump device of two medium complementary type adaptation severe cold district, includes user side heat exchanger (5), its characterized in that: one side of a connecting end of the user side heat exchanger (5) is communicated with the expansion valve (3), the other side of the connecting end of the user side heat exchanger (5) is communicated with the compressor (4), free ends of the expansion valve (3) and the compressor (4) are communicated with the selective heat exchanger set, and the selective heat exchanger set, the expansion valve (3), the user side heat exchanger (5) and the compressor (4) are connected in series to form a closed loop.
2. The heat pump device of claim 1, wherein: the selective heat exchanger unit comprises an air cooling branch and a water cooling branch, and the air cooling branch and the water cooling branch are connected in parallel.
3. The heat pump device of claim 2, wherein the heat pump device comprises: the air cooling branch of the selective ventilation type heat exchanger unit comprises an air cooling type heat exchanger (1), and two connecting ends of the air cooling type heat exchanger (1) are communicated with an expansion valve (3) and a compressor (4).
4. The heat pump device of claim 3, wherein the heat pump device comprises: the water-cooling branch of the selective heat exchanger unit comprises a water-cooling heat exchanger (2), and two connecting ends of the water-cooling heat exchanger (2) are communicated with an expansion valve (3) and a compressor (4).
5. The heat pump device of claim 4, wherein the heat pump device comprises: and the heat exchange connecting end of the water-cooled heat exchanger (2) is respectively communicated with low-temperature water source water supply and low-temperature water source return water.
6. The heat pump device of claim 3, wherein: and the heat exchange connecting end of the air-cooled heat exchanger (1) is communicated with an outdoor air-cooled heat exchanger fan (11).
7. The heat pump device of claim 5, wherein: and the heat exchange connecting end of the user side heat exchanger (5) is communicated with the user side backwater and the user side water supply.
8. The heat pump device of claim 5, wherein the heat pump device comprises: the selective-pass type heat exchanger unit comprises a three-way valve I, one end of the three-way valve I is communicated with an expansion valve (3), and the other two ends of the three-way valve I are communicated with an air-cooled heat exchanger (1) and a water-cooled heat exchanger (2).
9. The heat pump device of claim 8, wherein: the selective heat exchanger unit further comprises a three-way valve II, one end of the three-way valve II is communicated with the compressor (4), and the other two ends of the three-way valve II are communicated with the air-cooled heat exchanger (1) and the water-cooled heat exchanger (2).
10. The heat pump device of claim 9, wherein: no. I three-way valve, no. II three-way valve's pipe diameter is the same.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211036265.8A CN115507413A (en) | 2022-08-28 | 2022-08-28 | Double-medium complementary heat pump device suitable for severe cold area |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211036265.8A CN115507413A (en) | 2022-08-28 | 2022-08-28 | Double-medium complementary heat pump device suitable for severe cold area |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115507413A true CN115507413A (en) | 2022-12-23 |
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ID=84501610
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211036265.8A Pending CN115507413A (en) | 2022-08-28 | 2022-08-28 | Double-medium complementary heat pump device suitable for severe cold area |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115507413A (en) |
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2022
- 2022-08-28 CN CN202211036265.8A patent/CN115507413A/en active Pending
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