CN217715111U - Overlapping formula air source heat pump heating system - Google Patents
Overlapping formula air source heat pump heating system Download PDFInfo
- Publication number
- CN217715111U CN217715111U CN202221732057.7U CN202221732057U CN217715111U CN 217715111 U CN217715111 U CN 217715111U CN 202221732057 U CN202221732057 U CN 202221732057U CN 217715111 U CN217715111 U CN 217715111U
- Authority
- CN
- China
- Prior art keywords
- heat pump
- source heat
- temperature
- water
- air source
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000010438 heat treatment Methods 0.000 title claims abstract description 71
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 141
- 238000005338 heat storage Methods 0.000 claims abstract description 32
- 239000008236 heating water Substances 0.000 claims abstract description 10
- 238000010257 thawing Methods 0.000 abstract description 20
- 238000010521 absorption reaction Methods 0.000 description 4
- 238000005485 electric heating Methods 0.000 description 4
- 101100518501 Mus musculus Spp1 gene Proteins 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000004744 fabric Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Landscapes
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The utility model discloses a cascade air source heat pump heating system, including air source heat pump, be equipped with air source heat pump direct heating water route between its and the heating end: the water outlet of the air source heat pump is connected with the water inlet of the heating tail end through a low-temperature heat storage tank, a bypass pipe and a high-temperature heat storage tank in sequence, and the water outlet of the heating tail end is connected with the water inlet of the air source heat pump through a high-temperature water circulating pump and a bypass return pipe; the system also comprises a water source heat pump consisting of an evaporator and a condenser, wherein the evaporator is connected with the air source heat pump; the water outlet of the condenser is connected with the high-temperature heat storage tank through a valve, and the water inlet of the condenser is connected with the high-temperature water circulating pump. The utility model absorbs the heat in the hot water storage tank during defrosting operation, the water temperature drop of the tail end circulating system is small, and the influence on the indoor thermal comfort degree is small; the direct heating of the air source heat pump and the switching of the superposed operation of the air source heat pump and the water source heat pump can be realized according to different environments, and the high-efficiency heating can be realized at the temperature as low as-10 ℃.
Description
Technical Field
The utility model belongs to the technical field of indoor heating, a cascade air source heat pump heating system is related to.
Background
The air source heat pump is a high-efficiency environment-friendly heating mode, and the energy utilization efficiency is more than 2 times of that of direct electric heating. However, there are two main problems in the application of the air source heat pump that affect the heating effect:
1. when the outdoor temperature is lower than 0 ℃, the efficiency of the air source heat pump is obviously reduced; in order to solve the problem, mainstream heating and ventilation equipment manufacturers develop a low-temperature air source heat pump with a steam spray welding compressor, which can improve the heating efficiency under low-temperature working conditions, but the price of the low-temperature air source heat pump is far higher than that of a common air source heat pump.
2. In the operation process of the air source heat pump, the surface of the air heat exchanger can be frosted, and the frost layer influences the heat absorption of the air heat exchanger, so that the heating quantity is reduced. In addition, the air source heat pump needs to be switched to defrosting operation periodically, the heat of an indoor heating water system is absorbed in the defrosting operation and is used for heating an air heat exchanger to melt a frost layer, and the temperature of indoor tail end heating media is reduced to greatly influence the thermal comfort degree in the defrosting operation.
SUMMERY OF THE UTILITY MODEL
The utility model provides a technical problem provide a cascade air source heat pump heating system can realize high-efficient heating under the temperature of low to-10 degrees, reduces the influence of defrosting operation to indoor hot comfort level.
The utility model discloses a realize through following technical scheme:
the utility model provides a cascade air source heat pump heating system, includes air source heat pump, is equipped with air source heat pump direct heating water route between its and the heating end: the water outlet of the air source heat pump is connected with the water inlet of the heating tail end through a low-temperature heat storage tank, a bypass pipe and a high-temperature heat storage tank in sequence, and the water outlet of the heating tail end is connected with the water inlet of the air source heat pump through a high-temperature water circulating pump and a bypass return pipe;
the system also comprises a water source heat pump consisting of an evaporator and a condenser, wherein a water inlet of the evaporator is connected with the low-temperature heat storage tank through a valve, and a water outlet of the evaporator is connected with a water inlet of the air source heat pump through a low-temperature water circulating pump; the water outlet of the condenser is connected with the high-temperature heat storage tank through a valve, and the water inlet of the condenser is connected with the high-temperature water circulating pump.
When the outdoor temperature is higher than 0 ℃, the valve connected with the water source heat pump is closed, and the air source heat pump directly supplies heat to the heating tail end through the air source heat pump direct heating water channel.
When the outdoor temperature is lower than 0 ℃, closing a valve connected with the bypass pipe and the bypass return pipe, and opening a valve connected with the water source heat pump; the low-temperature water path circulation is formed by an air source heat pump, a low-temperature heat storage tank, an evaporator and a low-temperature water circulating pump; a condenser, a high-temperature heat storage tank, a heating tail end and a high-temperature water circulating pump form high-temperature water path circulation; the air source heat pump and the water source heat pump realize the overlapping operation through high-temperature waterway circulation and low-temperature waterway circulation.
Compared with the prior art, the utility model discloses following profitable technological effect has:
the utility model provides a cascade air source heat pump heating system, because air source heat pump direct heating water route circulation is established ties and is had high heat storage water tank, low temperature heat storage water tank, terminal circulation system thermal capacity is great, absorbs the heat in the heat storage water tank during defrosting operation, and terminal circulation system temperature range of falling is less, and is less to indoor thermal comfort degree influence;
further can realize the switching of air source heat pump direct heating, air source heat pump and water source heat pump stack operation according to different environment: when the outdoor temperature is higher than 0 ℃, the air source heat pump is switched to directly supply heat through the valve, the system operation efficiency is higher, and the influence of defrosting operation on indoor thermal comfort is smaller; when the outdoor temperature is lower than 0 ℃, the air source heat pump and the water source heat pump are switched to use for overlapping heating through the valve;
the front and back pressure difference of the compressor of the air source heat pump and the water source heat pump is in a reasonable interval during the overlapping operation, the air source heat pump and the water source heat pump can both realize high-efficiency operation, and the total efficiency after overlapping is still at a higher level: the cascade air source heat pump heating system enables the air source heat pump and the water source heat pump to operate in a high-efficiency working condition, and the total efficiency of the two heat pumps is still 2.5 times that of direct electric heating after the two heat pumps operate in a cascade mode; and because high, low temperature water route circulation is established ties respectively and is had high, low temperature storage hot water jar, follow low temperature storage hot water jar absorption heat during air source heat pump defrosting operation, low temperature water route circulation temperature drops the width of cloth less, and water source heat pump evaporator still can follow low temperature storage hot water jar and absorb the heat, guarantees that high temperature water route circulation heating is terminal to heat in succession, and is less to indoor thermal comfort degree influence.
Drawings
FIG. 1 is a schematic view of the connection of the air source heat pump direct heating water path of the present invention;
fig. 2 is a schematic view of the connection between the air source heat pump and the water source heat pump in the overlapping operation of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following examples, which are intended to be illustrative, but not limiting, of the present invention.
Referring to fig. 1 and 2, a cascade air source heat pump heating system includes an air source heat pump, and an air source heat pump direct heating water path is provided between the air source heat pump and a heating end: the water outlet of the air source heat pump is connected with the water inlet of the heating tail end through a low-temperature heat storage tank, a bypass pipe and a high-temperature heat storage tank in sequence, and the water outlet of the heating tail end is connected with the water inlet of the air source heat pump through a high-temperature water circulating pump and a bypass return pipe;
the system also comprises a water source heat pump consisting of an evaporator and a condenser, wherein a water inlet of the evaporator is connected with the low-temperature heat storage tank through a valve, and a water outlet of the evaporator is connected with a water inlet of the air source heat pump through a low-temperature water circulating pump; the water outlet of the condenser is connected with the high-temperature heat storage tank through a valve, and the water inlet of the condenser is connected with the high-temperature water circulating pump.
When the outdoor temperature is higher than 0 ℃, a valve connected with the water source heat pump is closed, and the air source heat pump directly supplies heat to the heating tail end through the air source heat pump direct heating waterway.
Specifically, as shown in fig. 1, when the air source heat pump directly heats, the valve installed on the thick line pipeline is opened, and the valve installed on the thin line pipeline is closed, so that the water circuit cycle of the air source heat pump direct heating is formed.
When the outdoor temperature is lower than 0 ℃, closing a valve connected with the bypass pipe and the bypass return pipe, and opening a valve connected with the water source heat pump; the low-temperature water path circulation is formed by an air source heat pump, a low-temperature heat storage tank, an evaporator and a low-temperature water circulating pump; a condenser, a high-temperature heat storage tank, a heating tail end and a high-temperature water circulating pump form high-temperature water path circulation; the air source heat pump and the water source heat pump realize the overlapping operation through high-temperature waterway circulation and low-temperature waterway circulation.
Specifically, as shown in fig. 2, when the air source heat pump and the water source heat pump are used for heating in a cascade manner, the valve mounted on the thick line pipeline is opened, and the valve mounted on the thin line pipeline is closed, so that high-temperature and low-temperature waterway circulation of the air source heat pump and the water source heat pump in the cascade heating manner is formed.
Specific examples are given below.
The main equipment parameters of the cascade air source heat pump heating system example are as follows:
1. air source heat pump: when the outdoor temperature is-10 ℃, the water inlet temperature is 15 ℃, the water outlet temperature is 20 ℃, the electric power is input by 20kw, and the heating capacity is output by 100kw;
when the outdoor temperature is 7 ℃, the water inlet temperature is 40 ℃, the water outlet temperature is 45 ℃, the electric power is input to be 22kw, and the heating capacity is output to be 81.4kw;
2. the water source heat pump has the evaporator with water inlet temperature of 20 ℃ and water outlet temperature of 15 ℃, the condenser with water inlet temperature of 40 ℃ and water outlet temperature of 45 ℃, the input electric power of 25kw and the output heating capacity of 125kw.
3. The capacity of the high-temperature hot water storage tank is 3 cubic meters, and the capacity of the low-temperature hot water storage tank is 3 cubic meters.
Air source heat pump heating system air source heat pump direct heating (see fig. 1):
when the outdoor temperature is 7 ℃, an air source heat pump is adopted for direct heating. The water inlet temperature of the air source heat pump is 40 ℃, the water outlet temperature is 45 ℃, the input electric power is 22kw, and the output heating capacity is 81.4kw.
Calculating the direct heating efficiency eta 1 of the air source heat pump: η 1=81.4/22=3.7;
namely, when the outdoor temperature is 7 ℃, the direct heating efficiency of the air source heat pump is 3.7 times of the direct electric heating efficiency.
The air source heat pump performs heating operation for 80 minutes, performs defrosting operation for 10 minutes, and performs cycle operation by taking 90 minutes as a period; during a single defrosting operation period, the air source heat pump needs to absorb heat from the high-temperature heat storage water tank and the low-temperature heat storage water tank, and the temperature drop t1 of the high-temperature heat storage water tank and the low-temperature heat storage water tank caused by defrosting operation is calculated as follows:
the defrosting operation air source heat pump inputs 20kw of electric power and absorbs 80kw of heat of the high-temperature and low-temperature hot water storage tanks.
4.2kj/(kg*℃)*3000kg*2*t1＝80kw*60s*10；
t1＝1.9℃；
Namely: the defrosting of the air source heat pump is operated for 10 minutes, the water temperature of the high-temperature water storage tank and the low-temperature water storage tank is reduced by 1.9 degrees, the temperature reduction amplitude of a tail end heating medium is small, and the influence on indoor thermal comfort is small.
Because the utility model discloses an air source heat pump direct heating water route circulation is established ties and is had 2 storage hot water tanks of high, low temperature, and terminal circulation system thermal capacity is great, absorbs the heat in the storage hot water tank during the defrosting operation, and terminal circulation system temperature range of falling is less, and is less to indoor thermal comfort degree influence.
Cascade air source heat pump heating system cascade heating (see fig. 2):
when the outdoor temperature is-10 ℃, an air source heat pump and a water source heat pump are used for heating in a cascade mode. The water inlet temperature of the air source heat pump is 15 ℃, the water outlet temperature is 20 ℃, the input electric power is 20kw, and the output heating capacity is 100kw; the water inlet temperature of the water source heat pump evaporator is 20 ℃, the water outlet temperature is 15 ℃, the water inlet temperature of the condenser is 40 ℃, the water outlet temperature of the condenser is 45 ℃, the input electric power is 25kw, and the output heating capacity is 125kw.
Calculating the overlapping type heating efficiency eta 2 of the air source heat pump and the water source heat pump: eta 2= 125/(20 + 25) =2.78;
namely, when the outdoor temperature is-10 ℃, the direct heating efficiency of the air source heat pump is 2.78 times of the direct electric heating efficiency.
The air source heat pump is operated for 80 minutes in a heating mode, is operated for 10 minutes in a defrosting mode, and is operated circularly by taking 90 minutes as a period. In a single defrosting operation period, the air source heat pump needs to absorb heat from the low-temperature heat storage water tank, and the temperature drop t2 of the low-temperature heat storage water tank caused by defrosting operation is calculated as follows:
the defrosting operation air source heat pump inputs 20kw of electric power and absorbs 80kw of heat of the low-temperature heat storage water tank.
4.2kj/(kg*℃)*3000kg*t2＝80kw*60s*10；
t2＝3.8℃；
Air source heat pump defrosting operation 10 minutes, low temperature store up hot-water cylinder temperature and reduce 3.8 degrees, and the water temperature still is higher than 15 degrees in the storage tank, and water source heat pump evaporator still can follow low temperature heat storage water tank and absorb the heat, and the hot water of 45 degrees guarantees the terminal continuous heating of high temperature water route circulation heating in the high temperature storage hot-water cylinder in coordination, and is less to indoor hot comfort degree influence.
Because high, low temperature water route circulation is established ties respectively and is had high temperature storage hot water jar, low temperature storage hot water jar, follow low temperature storage hot water jar absorption heat during air source heat pump defrosting operation, low temperature water route circulation temperature drops a little by a wide margin, and water source heat pump evaporator still can follow low temperature storage hot water jar absorption heat, guarantees the terminal continuous heating of high temperature water route circulation heating, and is less to indoor thermal comfort degree influence.
The embodiments given above are preferred examples for implementing the present invention, and the present invention is not limited to the above embodiments. Any non-essential addition and replacement made by the technical personnel in the field according to the technical characteristics of the technical scheme of the utility model all belong to the protection scope of the utility model.
Claims (3)
1. The utility model provides a cascade formula air source heat pump heating system which characterized in that, includes the air source heat pump, is equipped with air source heat pump direct heating water route between its and the heating end: the water outlet of the air source heat pump is connected with the water inlet of the heating tail end through a low-temperature heat storage tank, a bypass pipe and a high-temperature heat storage tank in sequence, and the water outlet of the heating tail end is connected with the water inlet of the air source heat pump through a high-temperature water circulating pump and a bypass return pipe;
the system also comprises a water source heat pump consisting of an evaporator and a condenser, wherein a water inlet of the evaporator is connected with the low-temperature heat storage tank through a valve, and a water outlet of the evaporator is connected with a water inlet of the air source heat pump through a low-temperature water circulating pump; the water outlet of the condenser is connected with the high-temperature heat storage tank through a valve, and the water inlet of the condenser is connected with the high-temperature water circulating pump.
2. The system of claim 1, wherein the valve associated with the water source heat pump is closed when the outdoor temperature is above 0 ℃, and the air source heat pump supplies heat to the heating end via the air source heat pump direct heating water path.
3. The overlapping type air source heat pump heating system as claimed in claim 1, wherein when the outdoor temperature is lower than 0 ℃, the valve connecting the bypass pipe and the bypass return pipe is closed, and the valve connected with the water source heat pump is opened; the low-temperature water path circulation is formed by an air source heat pump, a low-temperature heat storage tank, an evaporator and a low-temperature water circulating pump; a condenser, a high-temperature heat storage tank, a heating tail end and a high-temperature water circulating pump form high-temperature water path circulation; the air source heat pump and the water source heat pump realize the overlapping operation through high-temperature waterway circulation and low-temperature waterway circulation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221732057.7U CN217715111U (en) | 2022-07-05 | 2022-07-05 | Overlapping formula air source heat pump heating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221732057.7U CN217715111U (en) | 2022-07-05 | 2022-07-05 | Overlapping formula air source heat pump heating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217715111U true CN217715111U (en) | 2022-11-01 |
Family
ID=83777211
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221732057.7U Active CN217715111U (en) | 2022-07-05 | 2022-07-05 | Overlapping formula air source heat pump heating system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217715111U (en) |
-
2022
- 2022-07-05 CN CN202221732057.7U patent/CN217715111U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109114804B (en) | Photovoltaic and photothermal integrated double-source heat pump hot water system driven by solar photovoltaic and mains supply in combined mode and operation method thereof | |
| CN108224535B (en) | Complementary integrated system of cogeneration of thermal power plant and compressed air energy storage | |
| CN210568969U (en) | Double-source heat pump system | |
| CN109140797A (en) | A kind of solar energy, air can be combined electricity generation system and its refrigeration, power generation and heating method | |
| CN205316744U (en) | Compound cold and hot pair of confession system of solar energy of two sources heat pump | |
| CN112710023B (en) | Zero-energy-consumption uninterrupted operation solar heating system | |
| CN217715111U (en) | Overlapping formula air source heat pump heating system | |
| CN209605253U (en) | 300MW and ratings above wet type cooling unit high back pressure and heat pump united heating system | |
| CN201706672U (en) | Heat pump water heater without water storage tank | |
| CN105865026A (en) | Water heater with combined heat sources of solar energy and air energy | |
| CN113587176A (en) | Clean heat supply system with steam extraction coupling solar energy of thermoelectric unit and operation method | |
| CN210219966U (en) | Composite energy source heat supply system | |
| CN204854070U (en) | Air -source heat pump trigeminy supplies unit | |
| CN211372824U (en) | Air energy heat pump heating device capable of utilizing heat of PVT photovoltaic module | |
| CN208936566U (en) | A kind of solar energy, air can be combined electricity generation system | |
| CN209840253U (en) | Heat pump system for power plant waste heat cold and hot coupling utilization | |
| CN209214139U (en) | A kind of refrigeration system liquid refrigerant heat recovery energy-saving device | |
| CN209978258U (en) | Pentafluoropropane photovoltaic and photo-thermal integrated heat pump circulation system | |
| CN113701219A (en) | Building energy supplementing system and control method | |
| CN208620656U (en) | Thermoelectricity air cooling tubes condenser safe production in summer device based on condensation photovoltaic UTILIZATION OF VESIDUAL HEAT IN | |
| CN206709447U (en) | Direct current heat pump based on PVT heat collectors | |
| CN115127139B (en) | Cooling, steam supplying and heat supplying triple supply system and working method thereof | |
| CN109751651A (en) | 300MW and the double back pressures of ratings above air cooling unit and heat pump united heating system | |
| CN204716628U (en) | A kind of large-size thermal power plant vacuum pump cold cooling unit | |
| CN201103955Y (en) | Solar energy assistant air conditioning and water heating system device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A Cascade Air Source Heat Pump Heating System Granted publication date: 20221101 Pledgee: Xi'an innovation financing Company limited by guarantee Pledgor: QINHUA HEATING GROUP Co.,Ltd. Registration number: Y2024980024908 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |