CN207407558U - A kind of CO2 heat pump systems for inhibiting frosting - Google Patents

A kind of CO2 heat pump systems for inhibiting frosting Download PDF

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Publication number
CN207407558U
CN207407558U CN201721377173.0U CN201721377173U CN207407558U CN 207407558 U CN207407558 U CN 207407558U CN 201721377173 U CN201721377173 U CN 201721377173U CN 207407558 U CN207407558 U CN 207407558U
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China
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outlet
entrance
evaporator
refrigerant
heat pump
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CN201721377173.0U
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王钦戎
罗会龙
杜培俭
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Dongqi Science & Technology Co Ltd
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Dongqi Science & Technology Co Ltd
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Abstract

The utility model is related to a kind of CO for inhibiting frosting2Heat pump system belongs to HVAC field.The system includes evaporator, air cooler and plate heat exchanger, and plate heat exchanger includes first entrance, second entrance, first outlet and second outlet;Air cooler includes the 3rd entrance, the 4th entrance, the 3rd outlet and the 4th outlet;Wherein, first entrance connection high-temperature tempering, first outlet are connected by water circulating pump with triple valve inlet, and first outlet is equipped with temperature measuring equipment, triple valve the 3rd entrance of one of outlet connection, and the 3rd outlet is connected with second entrance, second outlet discharge hot water;4th entrance and the 4th outlet are sequentially connected refrigerant outlet and entrance, and another outlet of triple valve and the 3rd entrance are sequentially connected auxiliary refrigerant entrance and exit;Evaporator includes condensing agent evaporation tube and auxiliary refrigerant evaporation tube.The utility model reduces return water temperature, increases the temperature difference of air cooler both sides, extends heat pamp interval, is integrally improved system performance.

Description

A kind of CO for inhibiting frosting2Heat pump system
Technical field
The utility model is related to a kind of CO2Heat pump system, especially a kind of CO for inhibiting frosting2Heat pump system belongs to HVAC Field.
Background technology
Under energy crisis, the dual-pressure of environmental crisis, realize the sustainable development of building energy consumption, build cleaning low-carbon Energy system become focus of concern.As a kind of Substitute Working Medium of freon class refrigerant, CO2Because of its safety (no It is flammable, nontoxic), easily obtain, environmentally friendly (ODP=0, GWP=1) and excellent thermophysical property are paid more and more attention.CO2Heat pump has work Make the advantages that pressure is high, environmentally friendly, heating efficiency is high, therefore CO2Heat pump system is widely used.
But in cold district, heating CO2Heat pump system is run there are many problems, for example heats power is with temperature It is fast to decline attenuation;Leaving water temperature is low, fluctuation of service;Return water temperature is high, and the coefficient of performance is low;Frosting is fast, defrosting cycle length etc..Cause This, by improving heating CO2Heat pump system structure, to inhibit frosting, improve air cooler inflow temperature, raising system heating power It can be particularly important.
The content of the invention
In order to solve the above-mentioned technical problem, the purpose of this utility model is to provide a kind of CO for inhibiting frosting2Heat pump system System improves traditional air cooler structure, solves the problems, such as that air cooler inflow temperature is excessively high under worst cold case, so as to improve system heating power Performance.
The utility model is achieved through the following technical solutions:
A kind of CO for inhibiting frosting2Heat pump system, including evaporator, air cooler and plate heat exchanger, plate heat exchanger bag Include first entrance, second entrance, first outlet and second outlet;Air cooler include the 3rd entrance, the 4th entrance, the 3rd outlet and 4th outlet;Wherein, first entrance connection high-temperature tempering, first outlet are connected by water circulating pump with triple valve inlet, and first Outlet is equipped with temperature measuring equipment, triple valve the 3rd entrance of one of outlet connection, and the 3rd outlet is connected with second entrance, and second goes out Mouth discharge hot water;4th entrance and the 4th outlet are sequentially connected refrigerant outlet and entrance, and another outlet of triple valve and the 3rd enter Mouth is sequentially connected auxiliary refrigerant entrance and exit;Evaporator includes condensing agent evaporation tube and auxiliary refrigerant evaporation tube.
Further, the condensing agent entrance and the 4th outlet of evaporator, the refrigerant outlet of evaporator enter with the 4th Mouth connection, forms condensing agent circuit.
Further, the auxiliary refrigerant entrance of evaporator is connected with another outlet of triple valve, the auxiliary cooling of evaporator The 3rd entrance of agent outlet connection.
Further, it is equipped with throttle valve between the condensing agent entrance of evaporator and the 4th outlet.
Further, compressor is equipped between the refrigerant outlet of evaporator and the 4th entrance.
Further, the first entrance connection water collector of plate heat exchanger.
Further, plate heat exchanger second outlet connects water knockout drum by water circulating pump.
Compared with prior art, beneficial effects of the present invention are as follows:
It is divided into two parts inside evaporator, a part cycles for refrigerant circulation, another part for glycol water, For the cooling of high-temperature tempering.Evaporator two parts carry out internal heat, improve evaporator temperature, so as to inhibit frosting, extend Heat pamp interval.
High-temperature tempering is cooled down by plate heat exchanger, reduces air cooler inflow temperature, increases the temperature of air cooler both sides Difference improves system performance.
Description of the drawings
Fig. 1 is the CO of the utility model2The structure diagram of heat pump system;
Fig. 2 is the schematic diagram of the pipeline trend of the plate heat exchanger of the utility model;
Fig. 3 is the internal structure schematic diagram of the evaporator of the utility model;
Wherein, air cooler 1, the 3rd entrance 1.3,1.4 and the 4th outlet 1.2 of the 4th entrance the 1.1, the 3rd outlet, board-like change Hot device 2, first entrance 2.1, second entrance 2.3, first outlet 2.4 and second outlet 2.2, water circulating pump 3, electric T-shaped valve 4, Evaporator 5, condensing agent entrance 5.1, refrigerant outlet 5.2, auxiliary refrigerant entrance 5.3, auxiliary refrigerant outlet 5.4, Xun Huan Water pump 6, water knockout drum 7, water collector 8, compressor 9, throttle valve 10.
Specific embodiment
The following is a combination of the drawings in the embodiments of the present utility model, the technical solution in the present embodiment is carried out clear, complete Site preparation describes, it is clear that described embodiment is only the example to a part of example of the utility model rather than whole.Base Embodiment in the utility model, the institute that those of ordinary skill in the art are obtained under the premise of not making the creative labor There is other embodiment, shall fall within the protection scope of the present invention.
As shown in Figure 1, the CO of the present embodiment2Heat pump system, it is board-like including air cooler 1, plate heat exchanger 2 and evaporator 5 Heat exchanger 2 includes first entrance 2.1, second entrance 2.3, first outlet 2.4 and second outlet 2.2;Air cooler 1 enters including the 3rd The outlet 1.4 of the 1.3, the 4th entrance the 1.1, the 3rd of mouth and the 4th outlet 1.2, first entrance 2.1 connect high-temperature tempering, first outlet 2.4 are connected by water circulating pump 3 with 4 entrance of triple valve, and first outlet 2.4 is equipped with temperature measuring equipment, the one of outlet of triple valve 4 The 3rd entrance 1.3 is connected, the 3rd outlet 1.4 is connected with second entrance 2.3, and second outlet 2.2 discharges hot water;4th entrance 1.1 Refrigerant outlet and entrance, another outlet of triple valve 4 and the 3rd entrance 1.3 connection auxiliary system are sequentially connected with the 4th outlet 1.2 Cryogen entrance and exit, plate heat exchanger 2 are conventional structure, and internal duct trend is as shown in Fig. 2, preferably, can also be First outlet 2.4 adds temperature-detecting device, for detecting the inflow temperature of air cooler.
The condensing agent entrance 5.1 of evaporator 5 is connected with the 4th outlet 1.2, and the refrigerant outlet 5.2 of evaporator enters with the 4th Mouth 1.1 connects, and forms condensing agent circuit.Evaporator 5 uses the structure of subregion, as shown in figure 3, including conventional refrigerant evaporation tube 5.5th, glycol water evaporation tube 5.6 and the fin on refrigerant evaporation tube 5.5 and glycol water evaporation tube 5.6 5.7。
5.3 entrance of auxiliary refrigerant of evaporator 5 is connected with another outlet of triple valve 4, and the auxiliary refrigerant of evaporator 5 goes out Mouth 5.4 connects the 3rd entrances 1.3.Auxiliary refrigerant is glycol water.The condensing agent entrance 5.1 of evaporator 5 goes out with the 4th Throttle valve 10 is equipped between mouth 1.2.Compressor 9 is equipped between 5.2 and the 4th entrance 1.1 of refrigerant outlet.Plate heat exchanger 2 First entrance 2.1 connects water collector 8.Plate heat exchanger second outlet 2.2 connects water knockout drum 7 by water circulating pump 6.Condensing agent is CO2
In this way, compressor 9 outlet be connected with 1 entrance of air cooler, air cooler 1 export divides two-way, all the way with throttle valve 10 Entrance is connected, and the outlet of throttle valve 10 is connected with the refrigerant evaporation tube in evaporator 5, the refrigerant evaporation in evaporator 5 Pipe outlet is connected with 9 entrance of compressor;The another way of air cooler 1 is connected with the second entrance 2.3 of plate heat exchanger 2, plate The outlet of formula heat exchanger 2 divides two-way, and second outlet 2.2 is connected with 6 entrance of water circulating pump, the outlet of water circulating pump 6 and 7 phase of water knockout drum Connection;The first outlet 2.4 of plate heat exchanger 2 is connected with 3 entrance of water circulating pump, the outlet of water circulating pump 3 and electric T-shaped valve 4 It is connected.Electric T-shaped valve 4 divides two-way, is connected all the way with 1 water return outlet of air cooler, all the way with 4 glycol water of evaporator Evaporation tube is connected.Water collector 8 is connected with 2 first entrance 2.1 of plate heat exchanger.
The specific work process of the present embodiment is as follows:
Heat pump system is run, and heating high-temperature tempering, which first passes around plate heat exchanger 2, which carries out heat exchange, reduces return water temperature, when When return water temperature is less than setting value, return water is flowed directly by water circulating pump 3 in air cooler 2;When return water temperature is higher than setting value When, glycol water circuit is opened by electric T-shaped valve 4, again with being higher than returning for desired temperature after reduction return water temperature Water, which flows into after being mixed again in air cooler 2, carries out heat exchange generation heating hot water.High-temperature tempering is dropped by plate heat exchanger 2 Temperature reduces by 1 inflow temperature of air cooler, improves system performance.
Because CO2Critical-temperature be 31.6 DEG C, in order to ensure that system is in trans critical cycle so setting value is set to 1 inflow temperature setting value of air cooler is 32 DEG C.The refrigerant vapour of low-temp low-pressure becomes high temperature and pressure after being compressed from compressor 9 Refrigerant vapour, the refrigerant vapour of high temperature and pressure enter air cooler 1, are the refrigerant liquid of high temperature and pressure after condensation, simultaneously High-temperature-hot-water is generated, the refrigerant liquid of high temperature and pressure flows through the liquid that 10 reducing pressure by regulating flow of throttle valve is low-temp low-pressure, and low temperature is low The liquid of pressure completes refrigerant circulation through the gas that 5 refrigerant evaporation tube evaporation endothermic of evaporator is low-temp low-pressure.Air cooler 1 Thermogenetic hot water is changed directly to use by giving user in the entrance water knockout drum 7 of water circulating pump 6 by plate heat exchanger 2.It is each to use The high-temperature tempering at family is collected into hot-water return by water collector 8, and first passing around the heat exchange of plate heat exchanger 2 reduces return water temperature.Such as Fruit return water temperature is less than 32 DEG C, then is flowed directly by water circulating pump 3 in air cooler 1;If return water temperature is higher than 32 DEG C, electricity Dynamic triple valve 10 opens glycol water circuit, and a return water part flows to air cooler 1, and another part passes through glycol water Circuit is flowed into 5 glycol water evaporation tube of evaporator to be cooled down again, is then mixed with flowing to the return water of air cooler Conjunction makes return water temperature control carry out cycle heat exchange between 15 ~ 32 DEG C into air cooler, improve system performance.Whole system presses down Evaporimeter frosting processed extends defrosting time interval.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this Within the spirit and principle of utility model, any modifications, equivalent replacements and improvements are made should be included in the utility model Protection domain within.

Claims (7)

1. a kind of CO for inhibiting frosting2Heat pump system, it is characterised in that:It is board-like including evaporator, air cooler and plate heat exchanger Heat exchanger includes first entrance, second entrance, first outlet and second outlet;Air cooler includes the 3rd entrance, the 4th entrance, the Three outlets and the 4th outlet;Wherein, first entrance connection high-temperature tempering, first outlet are connected by water circulating pump and triple valve inlet It connects, first outlet is equipped with temperature measuring equipment, and triple valve the 3rd entrance of one of outlet connection, the 3rd outlet connects with second entrance It connects, second outlet discharge hot water;4th entrance and the 4th outlet are sequentially connected refrigerant outlet and entrance, another outlet of triple valve Auxiliary refrigerant entrance and exit is sequentially connected with the 3rd entrance;Evaporator includes condensing agent evaporation tube and auxiliary refrigerant is evaporated Pipe.
2. the CO according to claim 1 for inhibiting frosting2Heat pump system, it is characterised in that:The condensing agent entrance of evaporator with 4th outlet, the refrigerant outlet of evaporator are connected with the 4th entrance, form condensing agent circuit.
3. the CO according to claim 2 for inhibiting frosting2Heat pump system, it is characterised in that:The auxiliary refrigerant of evaporator enters Mouth is connected with another outlet of triple valve, and the auxiliary refrigerant outlet of evaporator connects the 3rd entrance.
4. the CO according to claim 2 for inhibiting frosting2Heat pump system, it is characterised in that:The condensing agent entrance of evaporator with Throttle valve is equipped between 4th outlet.
5. the CO according to claim 2 for inhibiting frosting2Heat pump system, it is characterised in that:The refrigerant outlet of evaporator with Compressor is equipped between 4th entrance.
6. the CO of the inhibition frosting according to one of claim 1-52Heat pump system, it is characterised in that:The of plate heat exchanger One entrance connects water collector.
7. the CO of the inhibition frosting according to one of claim 1-52Heat pump system, it is characterised in that:Plate heat exchanger second Outlet connects water knockout drum by water circulating pump.
CN201721377173.0U 2017-10-24 2017-10-24 A kind of CO2 heat pump systems for inhibiting frosting Active CN207407558U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201721377173.0U CN207407558U (en) 2017-10-24 2017-10-24 A kind of CO2 heat pump systems for inhibiting frosting

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201721377173.0U CN207407558U (en) 2017-10-24 2017-10-24 A kind of CO2 heat pump systems for inhibiting frosting

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CN207407558U true CN207407558U (en) 2018-05-25

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114963273A (en) * 2022-01-22 2022-08-30 昆明理工大学 Synergistic air source heat pump heating system adopting heating backwater active frost inhibition

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114963273A (en) * 2022-01-22 2022-08-30 昆明理工大学 Synergistic air source heat pump heating system adopting heating backwater active frost inhibition

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