CN104807184B - A kind of two stages of compression heat pump water heater system and its method of work - Google Patents
A kind of two stages of compression heat pump water heater system and its method of work Download PDFInfo
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- CN104807184B CN104807184B CN201510207791.XA CN201510207791A CN104807184B CN 104807184 B CN104807184 B CN 104807184B CN 201510207791 A CN201510207791 A CN 201510207791A CN 104807184 B CN104807184 B CN 104807184B
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Abstract
A kind of two stages of compression heat pump water heater system and its method of work, the system include double-stage compressor, condenser, intermediate pressure device, evaporator and three throttling arrangements；Its method of work is：Refrigerant after double-stage compressor one stage of compression is divided into two parts, and a part is passed through the water that low water temperature section I is heated in condenser after motor, then passes to intermediate pressure device；Another part carries out two-stage compression after being mixed with the liquid that the 3rd throttling arrangement flows out, then it is passed through in condenser and heats water, go out after condenser, sub-fraction throttles through the 3rd throttling arrangement, another major part is passed through intermediate pressure device after being throttled through first throttle device, the refrigerant come out from middle pressure apparatus absorbs heat in being passed through evaporator after being throttled through second throttling device and evaporated, then into compressor, so circulation；The present invention improves Teat pump boiler heating efficiency especially when high water temperature rises, and reduces that heat transfer temperature difference is excessive causes energy loss, overcomes existing Teat pump boiler weak point.
Description
Technical field
The invention belongs to Teat pump boiler technical field, and in particular to a kind of two stages of compression heat pump water heater system and its work
Make method.
Background technology
In recent years, with China's rapid development of economy, the continuous improvement of people's quality of life, each public place and resident
Demand to hot water is also increasing, and this has also promoted the fast development of all kinds of water heater products.And Teat pump boiler is with it
Energy-saving and environmental protection, it is efficient the advantages of increasingly favored by people, this power saving for allowing for Teat pump boiler becomes abnormal
It is prominent.
Teat pump boiler can be divided into static heated type, circulating heating type and Instant heating type three class by the mode of heating of water.
Refrigerant in static type and the condensed device of circulating heating type Teat pump boiler, i.e. cold water repeatedly repeatedly heats to reach
To rated temperature.There is problems with them：Need larger water tank；The radiating of water tank can cause the waste of energy；During heating
Between it is long；Compressor operating condition changes as water temperature changes not section, and when water temperature is relatively low, compression efficiency is relatively low；When water temperature compared with
Gao Shi, condensation temperature need to consume more work(compared to Instant heating type higher.Simultaneously whole system efficiency especially low temperature environment compared with
It is low.
Once heated for the condensed device of instant heating type heat pump water heater, i.e. cold water and reach specified leaving water temperature.Although such
Water heater can effectively overcome the shortcoming of static type and circulating heating type Teat pump boiler, but the operating mode of its compressor is severe, especially
It is, in the case where water temperature liter needs larger, environment temperature relatively low, to import and export water temperature difference and suction and discharge pressure ratio is in all the time
Maximum, delivery temperature is high, it is necessary to big cylinder displacement compressor.
And for three kinds of above-mentioned freon class Teat pump boilers, during the heat temperature raising of water, refrigerant exists
Two-phase section is temperature-resistant when condensing, and this just inevitably has the larger place of the temperature difference.The excessive temperature difference will also result in energy
A large amount of wastes.Do not accounted in conventional freon class Teat pump boiler energy-saving design from reduction water and the refrigeration temperature difference
Angle reduce energy loss.
The content of the invention
In order to solve the problem of above-mentioned prior art is present, it is an object of the invention to provide a kind of two stages of compression Heat Pump
Water heater system and its method of work, improve heating efficiency of the Teat pump boiler heating efficiency especially when high water temperature rises, subtract
Irreversible loss caused by small heat transfer excessive temperature differentials, overcomes existing Teat pump boiler weak point.
In order to achieve the above object, the present invention is adopted the following technical scheme that：
A kind of two stages of compression heat pump water heater system, including double-stage compressor 101, the middle pressure of the double-stage compressor 101
Outlet is connected with the center section of condenser 102, and the refrigerant flowed out from double-stage compressor 101 is heated by condenser 102
Refrigerant after water, heating water flows out from the outlet of condenser 102, and the outlet is connected with the entrance of intermediate pressure device 106,
The high-pressure outlet of double-stage compressor 101 is connected with the intake section of condenser 102, and the refrigerant after heated water is from condenser
It is divided into two-way after 102 outlet outflow, all the way the middle press-in after the throttling of the 3rd throttling arrangement 105 with double-stage compressor 101
Mouth is connected, and another road is connected by first throttle device 103 with the entrance of intermediate pressure device 106, intermediate pressure device
106 outlet is connected after the throttling of second throttling device 104 with the entrance of evaporator 107, the outlet of evaporator 107 with it is double
The low-pressure inlet of level compressor 101 is connected；Moisture in condenser 102 is entrance by the center section of the condenser 102
To the high water temperature section II of center section and center section to the low water temperature section I of exit portion, the water flow direction in condenser 102
It is in opposite direction with refrigerant flowing.
The method of work of two stages of compression heat pump water heater system described above, the refrigerant gas of low-temp low-pressure is by twin-stage pressure
Pressurization is divided into two parts, a part of medium temperature and medium pressure after becoming the refrigerant gas of medium temperature and medium pressure after the first-stage cylinder suction of contracting machine 101
Refrigerant gas pass through motor, absorb the center section that condenser 102 is passed through after the rise of motor thermal temperature to low water temperature section I
Water heating, and heat release is passed through intermediate pressure device 106, another part after becoming the liquid pressed in low temperature in condenser 102
Twin-stage pressure is passed through after the liquid hybrid cooling pressed in the low temperature that the refrigerant gas of medium temperature and medium pressure and the 3rd throttling arrangement 105 come out
The secondary cylinder of contracting machine 101 is compressed, and the refrigerant gas of the HTHP come out from the secondary cylinder of double-stage compressor 101 is passed through
In condenser 102, successively high water temperature section II and low water temperature section I water are heated, and heat release becomes low in condenser 102
The liquid of warm high pressure, the liquid of sub-fraction cryogenic high pressure leads to after throttling into the liquid pressed in low temperature through the 3rd throttling arrangement 105
Enter double-stage compressor 101, the liquid of another most of cryogenic high pressure throttles into the refrigeration pressed in low temperature through first throttle device 103
Intermediate pressure device 106 is passed through after agent liquid, the refrigerant liquid pressed in the low temperature come out from middle pressure apparatus 106 is through second
Throttling arrangement 104, which is throttled into, flows to evaporator 107 after the refrigerant of low-temp low-pressure, be changed into evaporator 107 after heat absorption evaporation
The overheated gas of low-temp low-pressure, then sucked by the first-stage cylinder of double-stage compressor 101, so circulation.
Compared to the prior art compared with the present invention possesses following advantage：
1st, the present invention by the heating process of water have it is original once directly heat, make into be divided to two sections to heat respectively, this
Sample effectively reduces the heat transfer temperature difference of water and refrigerant, the Energy Efficiency Ratio of system is greatly improved, is heated in same nominal
Saving energy consumption in the case of amount.
2. medium temperature and medium pressure refrigerant gas passes through motor, motor temperature is effectively reduced, and motor feels hot dress is moved on to
In water, utilize energy efficient.
3rd, delivery temperature can be effectively reduced by the way of refrigerant liquid is extracted in centre, while ensureing high to go out water temperature
Degree.
Brief description of the drawings
Fig. 1 is conventional heat pump water-heater system schematic diagram.
Fig. 2 is the circulation temperature enthalpy chart (T-h figures) of the conventional heat pump water-heater system course of work.
Fig. 3 is two stages of compression heat pump water heater system schematic diagram of the present invention.
Fig. 4 is the circulation temperature enthalpy chart (T-h figures) of the two stages of compression heat pump water heater system course of work of the present invention.
Embodiment
The present invention is described in detail with reference to the accompanying drawings and detailed description：
As shown in Figure 1 be conventional heat pump water-heater system, critical piece include compressor 11, the outlet of compressor 11 with it is cold
The entrance of condenser 12 is connected；The outlet of condenser 12 is connected with the entrance of choke valve 13；The outlet and evaporation of choke valve 13
The entrance of device 14 is connected；The outlet of evaporator 14 is connected with the entrance of compressor 11.
As shown in Fig. 2 be the circulation temperature enthalpy chart (T-h figures) of the conventional heat pump water-heater system course of work, what it was illustrated is
The course of work of system is：Pressed from the low-temperature low-pressure refrigerant gas (in figure at 01 point) of evaporator 14 into compressor 101
Boosting heating turns into superheated vapor (in figure at 02 point) after contracting, and superheated vapor (in figure at 02 point) releases heat in condenser 12
Turn into the subcooled liquid of high pressure afterwards (in figure at 03 point)；The high-pressure sub-cooled liquid (in figure at 03 point) come out from condenser 12 enters
The reducing pressure by regulating flow of choke valve 13 is into the phase refrigerant of low temperature two (in figure at 03 point), and two phase refrigerants (in figure at 03 point) are in evaporation
Heat absorption turns into low-temperature low-pressure refrigerant gas in device 14 (in figure at 01 point).Long dotted line is the heating process of water in figure, from figure
As can be seen that refrigerant is in condensation process, when in a two-phase state and water temperature difference TmaxIt is very big, such big temperature difference
Very big irreversible loss can be caused, so as to cause a large amount of wastes of energy.
As shown in figure 3, a kind of two stages of compression heat pump water heater system of the invention, including double-stage compressor 101, the twin-stage
Center section of the middle extrusion mouthful of compressor 101 1. with condenser 102 is connected, the refrigerant flowed out from double-stage compressor 101
The refrigerant heated by condenser 102 after water, heating water is flowed out from the outlet of condenser 102, and the outlet is filled with intermediate pressure
The entrance for putting 106 is connected, and the intake section of the high-pressure outlet of double-stage compressor 101 2. with condenser 102 is connected, heated
Refrigerant after water is divided into two-way after the outlet outflow of condenser 102, all the way after the 3rd throttling arrangement 105 with twin-stage pressure
4. the middle press-in mouthful of contracting machine 101 is connected, and the entrance phase of first throttle device 103 and intermediate pressure device 106 is passed through on another road
Connection, the entrance of the outlet of intermediate pressure device 106 with evaporator 107 after second throttling device 104 is connected, evaporator
3. 107 outlet is connected with the low-pressure inlet of double-stage compressor 101；The center section of the condenser 102 is by condenser 102
Interior moisture be entrance to center section high water temperature section II and center section to exit portion low water temperature section I, condenser 102
In the flowing of water flow direction and refrigerant it is in opposite direction.
The refrigerant gas that 3. double-stage compressor internal low-voltage entrance comes in is passed directly into low pressure (LP) cylinder and is compressed；Low pressure (LP) cylinder
Part of refrigerant out is passed through high pressure cylinder, another part out of low pressure (LP) cylinder after being mixed with the refrigerant that 4. entrance comes in
Refrigerant therefrom extrudes mouth after cooling down motor and 1. discharged；2. the refrigerant gas that high pressure cylinder has compressed discharges from high-pressure outlet.
As shown in figure 4, the circulation temperature enthalpy chart (T-h figures) of the two stages of compression heat pump water heater system course of work of the present invention, its
The system work process of signal is：The refrigerant gas (in figure at 1 point) of low-temp low-pressure is inhaled by the first-stage cylinder of double-stage compressor 101
Pressurization is divided into two parts, the refrigeration of a part of medium temperature and medium pressure after becoming the refrigerant gas (in figure at 2 points) of medium temperature and medium pressure after entering
Agent gas (in figure at 2 points) passes through motor, is passed through after absorbing the rise of motor thermal temperature (in figure at 2 " points) in condenser 102
Between part low water temperature section I water is heated, and heat release becomes after the liquid (in figure at 4 points) pressed in low temperature in condenser 102
It is passed through intermediate pressure device 106, refrigerant gas (in figure at 2 points) and the 3rd throttling arrangement 105 of another part medium temperature and medium pressure
The secondary cylinder of double-stage compressor 101 is passed through after liquid (in figure at the 10 points) mixing pressed in low temperature out to be compressed, from double
The refrigerant gas (in figure at 7 points) for the HTHP that the secondary cylinder of level compressor 101 comes out is passed through in condenser 102, successively
High water temperature section II and low water temperature section I water are heated, and heat release becomes the liquid (figure of cryogenic high pressure in condenser 102
In at 10 points), the liquid (in figure at 2 points) of sub-fraction cryogenic high pressure throttles into what is pressed in low temperature through the 3rd throttling arrangement 105
Double-stage compressor 101 is passed through after liquid (in figure at 4 points), the liquid of another most of cryogenic high pressure is through first throttle device 103
Throttle into and intermediate pressure device 106 is passed through after the refrigerant liquid pressed in low temperature, in the low temperature come out from middle pressure apparatus 106
The refrigerant liquid (in figure at 4 points) of pressure throttles into the refrigerant liquid of low-temp low-pressure (5 points in figure through second throttling device 104
Place) after flow to evaporator 107, in evaporator 107 heat absorption evaporation after be changed into the overheated gas of low-temp low-pressure (in figure at 1 point),
Sucked again by the first-stage cylinder of double-stage compressor 101, so circulation.Wherein long dotted portion is heated for respectively low-temperature zone water I's
The heating process of journey and high temperature section water II.
As can be seen that in the circulation temperature enthalpy chart (T-h figures) of the heat pump water heater system course of work of the present invention from such as Fig. 4
In, the temperature difference T of (as shown in Figure 2) refrigerant and water in a two-phase state compared with conventional heat pump water-heater systemmaxIAnd Δ
TmaxIIGreatly reduce, can thus reduce the irreversible loss as caused by the temperature difference, so as to save the energy.
Claims (1)
1. a kind of two stages of compression heat pump water heater system, it is characterised in that：Including double-stage compressor (101), the Two-stage Compression
The middle extrusion mouthful of machine (101) is connected with the center section of condenser (102), the refrigerant flowed out from double-stage compressor (101)
The refrigerant heated by condenser (102) after water, heating water flows out from the outlet of condenser (102), the outlet and intermediate pressure
The entrance of power apparatus (106) is connected, and the high-pressure outlet of double-stage compressor (101) is connected with the intake section of condenser (102)
Connect, the refrigerant after heated water is divided into two-way after the outlet outflow of condenser (102), all the way by the 3rd throttling arrangement
(105) it is connected after throttling with the middle press-in mouthful of double-stage compressor (101), another road is by first throttle device (103) with
Between the entrance of pressure apparatus (106) be connected, the outlet of intermediate pressure device (106) throttles by second throttling device (104)
The entrance with evaporator (107) is connected afterwards, and the outlet of evaporator (107) is connected with the low-pressure inlet of double-stage compressor (101)
Connect；Moisture in condenser (102) is high water temperature section of the entrance to center section by the center section of the condenser (102)
And center section is to the low water temperature section (I) of exit portion, water flow direction and refrigerant flowing side in condenser (102) (II)
To opposite；
The method of work of the two stages of compression heat pump water heater system is：The refrigerant gas of low-temp low-pressure is by double-stage compressor
(101) pressurization is divided into two parts after becoming the refrigerant gas of medium temperature and medium pressure after first-stage cylinder suction, a part of medium temperature and medium pressure
Refrigerant gas passes through motor, absorbs the center section that condenser (102) is passed through after the rise of motor thermal temperature to low water temperature section
(I) water heating, and heat release is passed through intermediate pressure device (106) after becoming the liquid pressed in low temperature in condenser (102), separately
Lead to after the liquid hybrid cooling pressed in the low temperature that the refrigerant gas of a part of medium temperature and medium pressure and the 3rd throttling arrangement (105) come out
The secondary cylinder for entering double-stage compressor (101) is compressed, the system of the HTHP come out from the secondary cylinder of double-stage compressor (101)
Refrigerant gas is passed through in condenser (102), and successively the water of high water temperature section (II) and low water temperature section (I) is heated, and cold
Heat release becomes the liquid of cryogenic high pressure in condenser (102), and the liquid of sub-fraction cryogenic high pressure is saved through the 3rd throttling arrangement (105)
Flow into and double-stage compressor (101) is passed through after the liquid pressed in low temperature, the liquid of another most of cryogenic high pressure is filled through first throttle
Put (103) and throttle into and intermediate pressure device (106) is passed through after the refrigerant liquid pressed in low temperature, from middle pressure apparatus (106)
The refrigerant liquid pressed in low temperature out flows to evaporation after the refrigerant that second throttling device (104) throttles into low-temp low-pressure
Device (107), is changed into the overheated gas of low-temp low-pressure in evaporator (107) after heat absorption evaporation, then by double-stage compressor (101) one
Level cylinder suction, so circulation.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510207791.XA CN104807184B (en) | 2015-04-27 | 2015-04-27 | A kind of two stages of compression heat pump water heater system and its method of work |
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| CN201510207791.XA CN104807184B (en) | 2015-04-27 | 2015-04-27 | A kind of two stages of compression heat pump water heater system and its method of work |
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| CN104807184B true CN104807184B (en) | 2017-07-14 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109059279A (en) * | 2017-06-13 | 2018-12-21 | 上海海立电器有限公司 | Compressor heat pumping system with double water temperature |
| CN109708337B (en) * | 2019-03-04 | 2021-10-01 | 北京热科能源技术研究有限公司 | Multistage series compression heat pump unit |
| CN110500910B (en) * | 2019-08-26 | 2023-09-15 | 华北电力大学 | Thermal mass decoupling method of thermal mass decoupling heat exchanger |
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|---|---|---|---|---|
| CN1912496A (en) * | 2006-08-17 | 2007-02-14 | 李华玉 | Steam compression heat pump using water as working medium |
| CN201053758Y (en) * | 2007-06-04 | 2008-04-30 | 南京工业大学 | Two-stage compression air source heat pump water heater |
| CN202835794U (en) * | 2012-10-08 | 2013-03-27 | 广东美的电器股份有限公司 | Heat-pump water heater and heating system |
| CN103808010A (en) * | 2012-11-15 | 2014-05-21 | 珠海格力电器股份有限公司 | Quasi-second-stage compression heat-pump water heater and control method thereof |
| CN104251552A (en) * | 2013-06-26 | 2014-12-31 | 广东美的暖通设备有限公司 | Heat pump water heater and control method thereof |
| CN204593855U (en) * | 2015-04-27 | 2015-08-26 | 西安交通大学 | A kind of two stages of compression heat pump water heater system |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60226668A (en) * | 1984-04-24 | 1985-11-11 | 株式会社荏原製作所 | Heat pump |
| JP2003262414A (en) * | 2002-03-08 | 2003-09-19 | Osaka Gas Co Ltd | Compression type heat pump and hot water feeder |
| JP4833330B2 (en) * | 2009-11-27 | 2011-12-07 | 三菱電機株式会社 | Supercritical vapor compression refrigeration cycle, air conditioning equipment and heat pump water heater using the same |
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2015
- 2015-04-27 CN CN201510207791.XA patent/CN104807184B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1912496A (en) * | 2006-08-17 | 2007-02-14 | 李华玉 | Steam compression heat pump using water as working medium |
| CN201053758Y (en) * | 2007-06-04 | 2008-04-30 | 南京工业大学 | Two-stage compression air source heat pump water heater |
| CN202835794U (en) * | 2012-10-08 | 2013-03-27 | 广东美的电器股份有限公司 | Heat-pump water heater and heating system |
| CN103808010A (en) * | 2012-11-15 | 2014-05-21 | 珠海格力电器股份有限公司 | Quasi-second-stage compression heat-pump water heater and control method thereof |
| CN104251552A (en) * | 2013-06-26 | 2014-12-31 | 广东美的暖通设备有限公司 | Heat pump water heater and control method thereof |
| CN204593855U (en) * | 2015-04-27 | 2015-08-26 | 西安交通大学 | A kind of two stages of compression heat pump water heater system |
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