CN101979938A - Backheating method and backheating structure for heat pump air conditioner - Google Patents
Backheating method and backheating structure for heat pump air conditioner Download PDFInfo
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- CN101979938A CN101979938A CN2010105637164A CN201010563716A CN101979938A CN 101979938 A CN101979938 A CN 101979938A CN 2010105637164 A CN2010105637164 A CN 2010105637164A CN 201010563716 A CN201010563716 A CN 201010563716A CN 101979938 A CN101979938 A CN 101979938A
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- air conditioner
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/52—Heat recovery pumps, i.e. heat pump based systems or units able to transfer the thermal energy from one area of the premises or part of the facilities to a different one, improving the overall efficiency
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Abstract
The invention discloses a backheating method and a backheating structure for a heat pump air conditioner, which can improve the performance of the air conditioner. The backheating structure comprises heat exchangers A and B, a compressor, and a throttling element connected between the heat exchangers A and B, wherein the heat exchanger B is connected with the compressor by an air suction pipe of the compressor; and a higher-temperature coolant in the throttling element performs heat exchange with a lower-temperature coolant in the air suction pipe of the compressor. In the backheating method and the backheating structure, the temperature of the coolant in the throttling element can be reduced by performing backheating in a throttling process, thereby retarding the evaporation of the coolant and the change of the dryness of the coolant, making more stable the flow regime of the coolant and reducing inevitable loss; and the dryness of the coolant at an outlet of the throttling element is reduced, namely, the degree of subcooling of the air conditioner is increased, so the cooling capacity of the air conditioner can be improved. The backheating method and the backheating structure for the heat pump air conditioner can improve the cooling or heating performance of the heat pump air conditioner; and the backheating structure is simplified to a certain extent so as to be convenient to manufacture and save the cost.
Description
Technical field
The present invention relates to a kind of heat regenerating method and backheat structure of heat pump air conditioner.
Background technology
The existing heat regenerating method that is adopted in the air-conditioning system is that the high-temperature liquid state refrigerant with the cryogenic gaseous refrigerant of evaporator outlet and condensator outlet carries out heat exchange, improves the refrigerant degree of supercooling thereby the high-temperature liquid state refrigerant temperature is reduced.Therefore, this heat regenerating method must carry out backheat before throttling.
Realize the basic backheat structure of this method, be reflected on Fig. 1, constituted by heat exchanger A (this moment do condenser), heat exchanger B (making evaporimeter this moment), compressor, the restricting element and the regenerator between restricting element and heat exchanger A that are connected between heat exchanger A and the heat exchanger B.
Although above-mentioned heat regenerating method can improve the degree of supercooling of refrigerant before throttling to a certain extent, reduce the degree of superheat of evaporator outlet, allow the refrigerant temperature difference of throttling front and back reduce as far as possible, reduce restriction loss, improve household air-conditioner, but still have backheat structure relative complex, manufacturing cost problem of higher.
In addition, in throttling process, after single-phase refrigerant enters restricting element from condenser, because the violent friction of high-velocity fluid and restricting element inner surface, cause the refrigerant pressure and temp constantly to descend, when pressure drops to the saturation pressure of temperature correspondence when following, refrigerant becomes two-phase, it is big that mass dryness fraction constantly becomes, and its density can constantly reduce, but because quality, flow are constant, thereby the refrigerant flowing velocity also can constantly rise, and may reach the critical flow state, and this makes the friction of fluid and wall aggravate, irreversible loss increases.This problem someone as yet proposes.
Summary of the invention
First technical problem solved by the invention provides a kind of heat regenerating method that can promote the heat pump air conditioner of household air-conditioner.
It is that refrigerant with relative low temperature in the refrigerant of relatively-high temperature in the restricting element and the compressor suction duct carries out heat exchange that the present invention solves the problems of the technologies described above the technical scheme that is adopted.Owing to be that refrigerant with relative low temperature in the refrigerant of relatively-high temperature in the restricting element and the compressor suction duct carries out heat exchange, so heat regenerating method of the present invention must be to carry out backheat in throttling process, i.e. throttling and backheat are carried out simultaneously.
Taking to carry out in throttling process backheat can make the refrigerant temperature in the restricting element reduce, thereby slowed down the variation of refrigerant vaporescence and refrigerant mass dryness fraction, make that the refrigerant flow regime is relatively stable, reduced irreversible loss, and owing to restricting element outlet refrigerant mass dryness fraction reduces, be equivalent to increase the degree of supercooling of system, can have improved system's refrigerating capacity.
The present invention specifically adopts throttle capillary tube as restricting element, and this throttle capillary tube and described compressor suction duct conducted heat to be connected carries out when realizing throttling and backheat.And in order to realize throttle capillary tube and compressor suction duct heat transfer are connected, the present invention is wrapped in described throttle capillary tube on the outer wall of compressor suction duct, perhaps, described throttle capillary tube is placed in the tube chamber of compressor suction duct, and make the two ends of this throttle capillary tube stretch out compressor suction duct.
Second technical problem solved by the invention provides a kind of backheat structure that can promote the heat pump air conditioner of household air-conditioner.The present invention solves this technical problem the technical scheme that is adopted:
The backheat structure of this heat pump air conditioner comprise heat exchanger A, heat exchanger B, compressor and be connected heat exchanger A and heat exchanger B between restricting element, described heat exchanger B links to each other with compressor by compressor suction duct, carries out heat exchange between the refrigerant of the refrigerant of relatively-high temperature and the interior relative low temperature of compressor suction duct in the described restricting element.
The present invention specifically adopts throttle capillary tube as restricting element, and this throttle capillary tube conducts heat with described compressor suction duct and is connected.For realizing that throttle capillary tube is connected with the compressor suction duct heat transfer, the present invention further is to be to be wrapped on the outer wall of compressor suction duct with throttle capillary tube, perhaps, with described throttle capillary tube is to place in the tube chamber of compressor suction duct, and the two ends of this throttle capillary tube are stretched out compressor suction duct and linked to each other with heat exchanger B with heat exchanger A respectively.
The invention has the beneficial effects as follows: by " p-h (pressure-enthalpy) " figure proof that test obtains, the heat regenerating method of heat pump air conditioner of the present invention and backheat structure can improve the refrigeration or the heating performance of heat pump type air conditioning system.In addition, because backheat structure of the present invention is not used existing regenerator, its structure is simplified to some extent, is convenient to make and save cost.
Description of drawings
Fig. 1 is existing backheat structure.
Fig. 2 is a backheat structure of the present invention.
Fig. 3 is wrapped in throttle capillary tube in schematic diagram on the outer wall of compressor suction duct for the embodiment of the invention 1.
Fig. 4 places throttle capillary tube for the embodiment of the invention 2 the intraluminal schematic diagram of compressor suction duct.
Fig. 5 adopts the heat pump air conditioner of backheat structure of the present invention and the systemic circulation of heat pump air conditioner on p-h (pressure-enthalpy) figure of no backheat structure to compare schematic diagram.
Be labeled as among the figure: heat exchanger A_1, regenerator _ 2, restricting element _ 3, throttle capillary tube _ 301, compressor suction duct _ 4, heat exchanger B_5, compressor _ 6, refrigerant _ 7, refrigerant _ 8.
The specific embodiment
The present invention is described further below in conjunction with drawings and Examples.
The backheat structure of heat pump air conditioner as shown in Figure 2, comprise heat exchanger A1, heat exchanger B5, compressor 6 and be connected heat exchanger A1 and heat exchanger B5 between restricting element 3, described heat exchanger B5 links to each other with compressor 6 by compressor suction duct 4, wherein, carry out heat exchange between the refrigerant 8 of the refrigerant 7 of relatively-high temperatures and compressor suction duct 4 interior relative low temperature in the described restricting element 3.Concrete, the present invention adopts throttle capillary tube 301 as restricting element 3, and this throttle capillary tube 301 conducts heat with described compressor suction duct 4 and is connected.The present invention further also provides two kinds to make throttle capillary tube 301 and described compressor suction duct 4 heat transfer ways of connecting, is illustrated below by following two embodiment.
As shown in Figure 3, throttle capillary tube 301 is wrapped on the outer wall of compressor suction duct 4.In conjunction with Fig. 2 and shown in Figure 3, when heat pump air conditioner is in refrigeration mode or heating mode, the refrigerant 7 of relatively-high temperature enters in the throttle capillary tube 301 from heat exchanger A1 (making condenser this moment), thereby in throttling with compressor suction duct 4 in the refrigerant 8 of relative low temperature carry out heat exchange, refrigerant after the throttling enters heat exchanger B5 (making evaporimeter this moment) and carries out evaporation and heat-exchange, the refrigerant 8 of relative low temperature enters compressor suction duct 4 again after the heat exchange, carry out heat exchange with the refrigerant 7 that is also carrying out the relatively-high temperature of throttling from heat exchanger A1 again, get back to compressor 6 at last and compress once more, thereby finish the circulation of refrigeration backheat.
As shown in Figure 5, under the same conditions, the circulation of not having the heat pump air conditioner of above-mentioned backheat structure is abcd, and the circulation that the heat pump air conditioner of above-mentioned backheat structure is arranged is aa ' b ' cd ' a.As can be seen, there is the refrigerant unit mass refrigerating capacity of the heat pump air conditioner of above-mentioned backheat structure to improve Δ h1, promptly cross cold part cd ', and the unit mass heating capacity has improved Δ h2, be backheat part aa ', and at evaporating pressure Po, under the constant situation of condensing pressure Pk, refrigerant unit mass wasted work remains unchanged.Therefore, there are its system's refrigeration of heat pump air conditioner, heating performance and the efficiency of backheat structure all can be improved.
As shown in Figure 4, throttle capillary tube 301 places in the tube chamber of compressor suction duct 4, and the two ends of this throttle capillary tube 301 are stretched out compressor suction duct 4 and linked to each other with heat exchanger B5 with heat exchanger A1 respectively.In conjunction with Fig. 2 and shown in Figure 4, when heat pump air conditioner is in refrigeration mode or heating mode, the refrigerant 7 of relatively-high temperature enters in the throttle capillary tube 301 from heat exchanger A1 (making condenser this moment), thereby in throttling with compressor suction duct 4 in the refrigerant 8 of relative low temperature carry out heat exchange, refrigerant after the throttling enters heat exchanger B5 (making evaporimeter this moment) and carries out evaporation and heat-exchange, the refrigerant 8 of relative low temperature enters compressor suction duct 4 again after the heat exchange, carry out heat exchange with the refrigerant 7 that is also carrying out the relatively-high temperature of throttling from heat exchanger A1 again, get back to compressor 6 at last and compress once more, thereby finish the circulation of refrigeration backheat.
As shown in Figure 5, under the same conditions, the circulation of not having the heat pump air conditioner of above-mentioned backheat structure is abcd, and the circulation that the heat pump air conditioner of above-mentioned backheat structure is arranged is aa ' b ' cd ' a.As can be seen, there is the refrigerant unit mass refrigerating capacity of the heat pump air conditioner of above-mentioned backheat structure to improve Δ h1, promptly cross cold part cd ', and the unit mass heating capacity has improved Δ h2, be backheat part aa ', and at evaporating pressure Po, under the constant situation of condensing pressure Pk, refrigerant unit mass wasted work remains unchanged.Therefore, there are its system's refrigeration of heat pump air conditioner, heating performance and the efficiency of backheat structure all can be improved.And than embodiment 1, because the refrigerant 8 of throttle capillary tube 301 and compressor suction duct 4 interior relative low temperature is direct contact heat-exchangings, thermal resistance is littler, therefore can obtain better backheat effect.
Of particular note, Fig. 1 and Fig. 2 only show the structure that makes refrigerant carry out unidirectional circulation.Therefore after this air-conditioning system installs, can only realize refrigeration or heat a kind of function at particular space.Realize the two-way circulation of air-conditioning system; also need to increase other part; but these parts are not the application's object of protection; and the concrete structure of underground these parts can be implemented the application's technical scheme equally, so no longer these parts are described at this.
Claims (8)
1. the heat regenerating method of heat pump air conditioner is characterized in that: the refrigerant (7) of the interior relatively-high temperature of restricting element (3) is carried out heat exchange with the refrigerant (8) of the interior relative low temperature of compressor suction duct (4).
2. the heat regenerating method of heat pump air conditioner as claimed in claim 1 is characterized in that: adopt throttle capillary tube (301) as restricting element (3), and this throttle capillary tube (301) is connected with described compressor suction duct (4) heat transfer.
3. the heat regenerating method of heat pump air conditioner as claimed in claim 2 is characterized in that: described throttle capillary tube (301) is wrapped on the outer wall of compressor suction duct (4).
4. the heat regenerating method of heat pump air conditioner as claimed in claim 2 is characterized in that: described throttle capillary tube (301) is placed in the tube chamber of compressor suction duct (4), and make the two ends of this throttle capillary tube (301) stretch out compressor suction duct (4).
5. the backheat structure of heat pump air conditioner, comprise heat exchanger A (1), heat exchanger B (5), compressor (6) and be connected heat exchanger A (1) and heat exchanger B (5) between restricting element (3), described heat exchanger B (5) links to each other with compressor (6) by compressor suction duct (4), it is characterized in that: carry out heat exchange between the refrigerant (8) with the refrigerant (7) of the interior relatively-high temperature of described restricting element (3) and the interior relative low temperature of compressor suction duct (4).
6. the backheat structure of heat pump air conditioner as claimed in claim 5 is characterized in that: adopt throttle capillary tube (301) as restricting element (3), this throttle capillary tube (301) is connected with described compressor suction duct (4) heat transfer.
7. the backheat structure of heat pump air conditioner as claimed in claim 6, it is characterized in that: described throttle capillary tube (301) is wrapped on the outer wall of compressor suction duct (4).
8. the backheat structure of heat pump air conditioner as claimed in claim 6, it is characterized in that: described throttle capillary tube (301) places in the tube chamber of compressor suction duct (4), and the two ends of this throttle capillary tube (301) are stretched out compressor suction duct (4) and linked to each other with heat exchanger B (5) with heat exchanger A (1) respectively.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010105637164A CN101979938A (en) | 2010-11-29 | 2010-11-29 | Backheating method and backheating structure for heat pump air conditioner |
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| CN2010105637164A CN101979938A (en) | 2010-11-29 | 2010-11-29 | Backheating method and backheating structure for heat pump air conditioner |
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| CN101979938A true CN101979938A (en) | 2011-02-23 |
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| CN2010105637164A Pending CN101979938A (en) | 2010-11-29 | 2010-11-29 | Backheating method and backheating structure for heat pump air conditioner |
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Cited By (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102095271A (en) * | 2011-03-01 | 2011-06-15 | 四川长虹空调有限公司 | Heat pump air conditioner |
| CN102914099A (en) * | 2011-08-05 | 2013-02-06 | 威斯通全球技术公司 | Refrigerant circuit |
| CN105698381A (en) * | 2014-11-26 | 2016-06-22 | 青岛经济技术开发区海尔热水器有限公司 | Heat pump water heater |
| CN106546029A (en) * | 2016-11-02 | 2017-03-29 | 广东高而美制冷设备有限公司 | A kind of low-temperature enthalpy-increasing system and its method of work |
| CN108168131A (en) * | 2017-12-28 | 2018-06-15 | 中南大学 | The refrigeration system of one stage of compression two-step throttle noise reduction |
| DE102017110706A1 (en) * | 2017-05-17 | 2018-11-22 | Miele & Cie. Kg | Throttle device for a heat pump and heat pump with a throttle device |
| CN109000414A (en) * | 2018-06-15 | 2018-12-14 | 青岛海尔股份有限公司 | Refrigeration system and refrigerator for refrigerator |
| CN109114851A (en) * | 2018-11-12 | 2019-01-01 | 珠海格力电器股份有限公司 | Heat regenerator and refrigeration cycle system |
| CN110332113A (en) * | 2019-07-17 | 2019-10-15 | 珠海格力电器股份有限公司 | Compressor and air conditioning system with self-cooling lubricating oil function |
| CN110486994A (en) * | 2019-09-23 | 2019-11-22 | 宁波奥克斯电气股份有限公司 | One kind preventing back liquid device and air conditioner |
| CN110895089A (en) * | 2018-09-12 | 2020-03-20 | 广东美的生活电器制造有限公司 | Cold and hot integrated device |
| CN110895087A (en) * | 2018-09-12 | 2020-03-20 | 广东美的生活电器制造有限公司 | Cold and hot integrated device |
| CN111076391A (en) * | 2020-03-02 | 2020-04-28 | 罗良宜 | Multi-row parallel-pipe type air conditioner heat regenerator |
| WO2020143787A1 (en) * | 2019-01-11 | 2020-07-16 | 青岛海尔智能技术研发有限公司 | Compression refrigeration system and cold storage and freezing device |
| CN111623546A (en) * | 2020-04-26 | 2020-09-04 | 珠海格力电器股份有限公司 | Triple throttling enthalpy-increasing double-condensation refrigerating system, air conditioner and control method |
| CN111854206A (en) * | 2019-04-28 | 2020-10-30 | 青岛海尔智能技术研发有限公司 | Refrigerator equipment, refrigerating system and control method of refrigerating system |
| CN112762518A (en) * | 2020-12-31 | 2021-05-07 | 青岛海尔空调电子有限公司 | Air conditioning unit and control method thereof |
| CN112856588A (en) * | 2021-01-22 | 2021-05-28 | 青岛海尔空调器有限总公司 | Air conditioner indoor unit and air conditioner |
| CN112856866A (en) * | 2021-01-22 | 2021-05-28 | 青岛海尔空调器有限总公司 | Throttling element, throttling liquid-separating assembly and air conditioner indoor unit |
| CN113654301A (en) * | 2021-08-27 | 2021-11-16 | 中山市凯腾电器有限公司 | Double-evaporator refrigeration system and refrigeration equipment |
| CN114484944A (en) * | 2022-03-22 | 2022-05-13 | 珠海格力电器股份有限公司 | Self-supercooling structure and air conditioner |
| CN115289699A (en) * | 2022-08-01 | 2022-11-04 | 西安交通大学 | Vapor compression refrigeration cycle system with two-phase heat return for refrigerator or freezer and method |
| CN115790004A (en) * | 2022-06-09 | 2023-03-14 | 合肥美的电冰箱有限公司 | Heat regenerator, gas return pipeline system, gas circuit heat regeneration method and refrigeration equipment |
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| CN102095271A (en) * | 2011-03-01 | 2011-06-15 | 四川长虹空调有限公司 | Heat pump air conditioner |
| CN102914099A (en) * | 2011-08-05 | 2013-02-06 | 威斯通全球技术公司 | Refrigerant circuit |
| CN105698381A (en) * | 2014-11-26 | 2016-06-22 | 青岛经济技术开发区海尔热水器有限公司 | Heat pump water heater |
| CN106546029A (en) * | 2016-11-02 | 2017-03-29 | 广东高而美制冷设备有限公司 | A kind of low-temperature enthalpy-increasing system and its method of work |
| DE102017110706A1 (en) * | 2017-05-17 | 2018-11-22 | Miele & Cie. Kg | Throttle device for a heat pump and heat pump with a throttle device |
| CN108168131A (en) * | 2017-12-28 | 2018-06-15 | 中南大学 | The refrigeration system of one stage of compression two-step throttle noise reduction |
| CN108168131B (en) * | 2017-12-28 | 2023-06-20 | 中南大学 | Refrigerating system with primary compression and secondary throttling noise reduction |
| CN109000414A (en) * | 2018-06-15 | 2018-12-14 | 青岛海尔股份有限公司 | Refrigeration system and refrigerator for refrigerator |
| CN110895089A (en) * | 2018-09-12 | 2020-03-20 | 广东美的生活电器制造有限公司 | Cold and hot integrated device |
| CN110895087A (en) * | 2018-09-12 | 2020-03-20 | 广东美的生活电器制造有限公司 | Cold and hot integrated device |
| CN110895087B (en) * | 2018-09-12 | 2022-06-07 | 广东美的生活电器制造有限公司 | Cold and hot integrated device |
| CN109114851A (en) * | 2018-11-12 | 2019-01-01 | 珠海格力电器股份有限公司 | Heat regenerator and refrigeration cycle system |
| WO2020143787A1 (en) * | 2019-01-11 | 2020-07-16 | 青岛海尔智能技术研发有限公司 | Compression refrigeration system and cold storage and freezing device |
| CN111435043A (en) * | 2019-01-11 | 2020-07-21 | 青岛海尔智能技术研发有限公司 | Compression type refrigerating system and refrigerating and freezing device |
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| CN110332113A (en) * | 2019-07-17 | 2019-10-15 | 珠海格力电器股份有限公司 | Compressor and air conditioning system with self-cooling lubricating oil function |
| CN110486994A (en) * | 2019-09-23 | 2019-11-22 | 宁波奥克斯电气股份有限公司 | One kind preventing back liquid device and air conditioner |
| CN111076391A (en) * | 2020-03-02 | 2020-04-28 | 罗良宜 | Multi-row parallel-pipe type air conditioner heat regenerator |
| CN111623546A (en) * | 2020-04-26 | 2020-09-04 | 珠海格力电器股份有限公司 | Triple throttling enthalpy-increasing double-condensation refrigerating system, air conditioner and control method |
| CN112762518A (en) * | 2020-12-31 | 2021-05-07 | 青岛海尔空调电子有限公司 | Air conditioning unit and control method thereof |
| CN112856588A (en) * | 2021-01-22 | 2021-05-28 | 青岛海尔空调器有限总公司 | Air conditioner indoor unit and air conditioner |
| CN112856866A (en) * | 2021-01-22 | 2021-05-28 | 青岛海尔空调器有限总公司 | Throttling element, throttling liquid-separating assembly and air conditioner indoor unit |
| CN113654301A (en) * | 2021-08-27 | 2021-11-16 | 中山市凯腾电器有限公司 | Double-evaporator refrigeration system and refrigeration equipment |
| CN114484944A (en) * | 2022-03-22 | 2022-05-13 | 珠海格力电器股份有限公司 | Self-supercooling structure and air conditioner |
| CN115790004A (en) * | 2022-06-09 | 2023-03-14 | 合肥美的电冰箱有限公司 | Heat regenerator, gas return pipeline system, gas circuit heat regeneration method and refrigeration equipment |
| WO2023236635A1 (en) * | 2022-06-09 | 2023-12-14 | 合肥美的电冰箱有限公司 | Heat regenerator, air return pipeline system, air path heat regeneration method, and refrigeration apparatus |
| CN115289699A (en) * | 2022-08-01 | 2022-11-04 | 西安交通大学 | Vapor compression refrigeration cycle system with two-phase heat return for refrigerator or freezer and method |
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Application publication date: 20110223 |