阅读说明：本技术 用于制冷系统的热氟化霜系统、控制方法及制冷系统 (Hot fluoridation cream system, control method and refrigeration system for refrigeration system ) 是由 张治平 周巍 罗炽亮 练浩民 马宁芳 于 2019-09-23 设计创作，主要内容包括：本发明涉及一种用于制冷系统的热氟化霜系统、控制方法及制冷系统,其中,热氟化霜系统包括：压缩机(1)；冷凝器(2)；至少两个第一蒸发器(5),均可选择地工作于制冷状态或化霜状态；和第二蒸发器(6),用于将第一蒸发器(5)在化霜状态产生的液态冷媒蒸发为气态冷媒；各第一蒸发器(5)的液态冷媒流通口在制冷状态下与冷凝器(2)连通,在化霜状态下与第二蒸发器(6)连通；各第一蒸发器(5)的气态冷媒流通口在制冷状态下与压缩机(1)的吸气口连通,在化霜状态下与压缩机(1)的排气口连通。该系统可在节约电能的基础上根据需要灵活地实现除霜。(The present invention relates to a kind of hot fluoridation cream system, control method and refrigeration systems for refrigeration system, wherein hot fluoridation cream system includes: compressor (1)；Condenser (2)；At least two first evaporators (5), selectively work in refrigerating state or defrost state；With the second evaporator (6), it is used to the first evaporator (5) being evaporated to gaseous coolant in the liquid refrigerants that defrost state generates；The liquid refrigerants communication port of each first evaporator (5) is connected under refrigerating state with condenser (2), is connected under defrost state with the second evaporator (6)；The gaseous coolant communication port of each first evaporator (5) is connected under refrigerating state with the air entry of compressor (1), is connected under defrost state with the exhaust outlet of compressor (1).Defrosting can be neatly realized as needed on the basis of saving electric energy in the system.)

1. a kind of hot fluoridation cream system for refrigeration system characterized by comprising

Compressor (1)；

Condenser (2)；

At least two first evaporators (5), selectively work in refrigerating state or defrost state；With

Second evaporator (6), it is cold for first evaporator (5) to be evaporated to gaseous state in the liquid refrigerants that defrost state generates Matchmaker；

Wherein, the liquid refrigerants communication port of each first evaporator (5) is connected under refrigerating state with the condenser (2), It is connected under defrost state with second evaporator (6)；The gaseous coolant communication port of each first evaporator (5) is being freezed It is connected under state with the air entry of the compressor (1), is connected under defrost state with the exhaust outlet of the compressor (1).

2. the hot fluoridation cream system according to claim 1 for refrigeration system, which is characterized in that one described first is steamed When hair device (5) is in defrost state, at least one of remaining described first evaporator (5) is in refrigerating state.

3. the hot fluoridation cream system according to claim 1 for refrigeration system, which is characterized in that each first evaporation Liquid supply pipe group is equipped between the liquid refrigerants communication port and the condenser (2) of device (5), the liquid supply pipe group includes:

The first end of general piping for liquids (10), the general piping for liquids (10) is connected to the condenser (2)；

Multiple feed flow branch pipes (11；12), each feed flow branch pipe (11；12) first end with the general piping for liquids (10) The connection of two ends, each feed flow branch pipe (11；12) second end circulates with the liquid refrigerants of each first evaporator (5) respectively Mouth connection；With

Multiple first on-off valves (71；72), it is respectively provided at each feed flow branch pipe (11；12) on, for feed flow branch where controlling Pipe (11；12) on-off.

4. the hot fluoridation cream system according to claim 1 for refrigeration system, which is characterized in that each first evaporation Air supply pipe group, the air supply pipe group packet are equipped between the gaseous coolant communication port of device (5) and the exhaust outlet of the compressor (1) It includes:

The first end of air supply header (20), the air supply header (20) is connected to the exhaust outlet of the compressor (1)；

Multiple gas manifolds (21；22), each gas manifold (21；22) first end with the air supply header (20) The connection of two ends, each gas manifold (21；22) second end connects with the gaseous coolant communication port of each first evaporator (5) respectively It is logical；With

Multiple second on-off valves (73；74), it is respectively provided at each gas manifold (21；22) on, for gas supply branch where controlling Pipe (21；22) on-off.

5. the hot fluoridation cream system according to claim 1 for refrigeration system, which is characterized in that each first evaporation Drain pipe group is equipped between the liquid refrigerants communication port of device (5) and second evaporator (6), the drain pipe group includes:

Multiple drain branch pipes (31；32), each drain branch pipe (31；32) first end with first evaporator (5) The connection of liquid refrigerants communication port；

Liquid header (30), the first end of the liquid header (30) and each drain branch pipe (31；32) second end connects Logical, the second end of the liquid header (30) is connected to second evaporator (6)；With

Multiple third on-off valves (75；76), it is respectively provided at each drain branch pipe (31；32) on, for drain branch pipe where controlling (31；32) on-off.

6. the hot fluoridation cream system according to claim 1 for refrigeration system, which is characterized in that under defrost state, The liquid refrigerants communication port of second evaporator (6) is connected to the liquid refrigerants communication port of first evaporator (5), described The gaseous coolant communication port of second evaporator (6) is connected to the air entry of the compressor (1).

7. the hot fluoridation cream system according to claim 1 for refrigeration system, which is characterized in that further include liquid storage device (3), the liquid storage device (3) is connected to the liquid refrigerants communication port of the condenser (2), the liquid of each first evaporator (5) State refrigerant communication port is connected under refrigerating state with the liquid storage device (3).

8. the hot fluoridation cream system according to claim 1 for refrigeration system, which is characterized in that further include:

First expansion valve (77) is located between the liquid refrigerants communication port and the condenser (2) of first evaporator (5) Guan Shang；And/or

Second expansion valve (78), be located at first evaporator (5) liquid refrigerants communication port and second evaporator (6) On pipe between liquid refrigerants communication port.

9. the hot fluoridation cream system according to claim 1 for refrigeration system, which is characterized in that further include:

First check valve (81) is located between the condenser (2) and the liquid refrigerants communication port of first evaporator (5) Guan Shang, for making refrigerant from the condenser (2) to the first evaporator (5) one-way flow；

Second one-way valve (82), be located at first evaporator (5) liquid refrigerants communication port and second evaporator (6) On pipe between liquid refrigerants communication port, for keeping refrigerant unidirectional from first evaporator (5) to second evaporator (6) Circulation；

Third check valve (83) is located at the gaseous coolant communication port of second evaporator (6) and the air-breathing of the compressor (1) On pipe between mouthful, for making refrigerant from second evaporator (6) to the compressor (1) one-way flow；And/or

The gaseous coolant of 4th check valve (84), the exhaust outlet and first evaporator (5) that are located at the compressor (1) circulates On pipe between mouthful, for making the refrigerant from the compressor (1) to the first evaporator (5) one-way flow.

10. a kind of refrigeration system, which is characterized in that including any heat fluorination for refrigeration system of claim 1~9 Defrosting system.

11. refrigeration system according to claim 10, which is characterized in that the refrigeration system includes freezer.

12. refrigeration system according to claim 11, which is characterized in that second evaporator (6) is located at the freezer Outside.

13. a kind of control method based on any hot fluoridation cream system for refrigeration system of claim 1~9, special Sign is, comprising:

Under refrigerating state, it is connected to the liquid refrigerants communication port of first evaporator (5) with the condenser (2), gaseous state Refrigerant communication port is connected to the air entry of the compressor (1)；

Under defrost state, make the liquid refrigerants communication port of first evaporator (5) to defrost and second evaporator (6) it is connected to, gaseous coolant communication port is connected to the exhaust outlet of the compressor (1).

14. control method according to claim 13, which is characterized in that at first evaporator (5) to defrost When defrost state, further includes:

At least one of remaining described first evaporator (5) is set to be in refrigerating state.

Technical field

The present invention relates to refrigeration system control technology field more particularly to a kind of hot fluoridation cream systems for refrigeration system System, control method and refrigeration system.

Background technique

Heat exchanger long-term work in cold storage refrigerating system can tie on comb and heat exchanger in the environment of low temperature and high relative humidity The growth of frost, frost layer can be such that the coefficient of performance of unit reduces, and excessively thick and heavy frost layer results even in whole service thrashing, So defrosting function must be taken into consideration in low-temperature cold store.Currently used there are two types of defrost modes: electric heating defrost and hot fluoridation cream, In, hot fluoridation cream mode can be very good that electric heating is replaced to carry out defrost, save a large amount of electric energy.

Hot fluoridation cream system for refrigeration system provides heat using compressor air-discharging, and exhaust is passed through evaporator will be external Frost layer is melted, and the gas condensation of discharge becomes liquid.There are liquid emission problems for defrost process, if be discharged not in time, can make At the liquid that is switched on back.For this purpose, a kind of the relevant technologies that inventor is known are to add drain bucket in systems, drain into defrost liquid In drain bucket, drain bucket is connect with system low-voltage.

If this partially liq returned in system by Electric heating gasification, it may be desirable to consume additional electric energy；Such as Fruit will drain into this partially liq in the evaporator of other freezers, usually be operated by complicated valve group and control logic, Keep defrosting system pipeline and control complicated, it is at high cost, easily there is back the problems such as liquid in misoperation and it is necessary to have one Above freezer is freezing, and can not achieve on-demand defrosting.

Summary of the invention

The purpose of the present invention is to propose to a kind of hot fluoridation cream system, control method and refrigeration system for refrigeration system, On-demand defrost can be realized on the basis of saving electric energy.

According to an aspect of the invention, it is proposed that a kind of hot fluoridation cream system for refrigeration system, comprising:

Compressor；

Condenser；

At least two first evaporators selectively work in refrigerating state or defrost state；With

Second evaporator, for the first evaporator to be evaporated to gaseous coolant in the liquid refrigerants that defrost state generates；

Wherein, the liquid refrigerants communication port of each first evaporator is connected under refrigerating state with condenser, in defrost state It is lower to be connected to the second evaporator；The gaseous coolant communication port of each first evaporator connects under refrigerating state with the air entry of compressor It is logical, it is connected under defrost state with the exhaust outlet of compressor.

In some embodiments, when first evaporator is in defrost state, in remaining first evaporator at least one It is a to be in refrigerating state.

In some embodiments, liquid supply pipe group is equipped between the liquid refrigerants communication port and condenser of each first evaporator, Liquid supply pipe group includes:

The first end of general piping for liquids, general piping for liquids is connected to condenser；

The first end of multiple feed flow branch pipes, each feed flow branch pipe is connected to the second end of general piping for liquids, each feed flow branch pipe Second end is connected to the liquid refrigerants communication port of each first evaporator respectively；With

Multiple first on-off valves are respectively provided at each feed flow branch pipe；On, the on-off for feed flow branch pipe where controlling.

In some embodiments, it is equipped with and supplies between the gaseous coolant communication port of each first evaporator and the exhaust outlet of compressor Tracheae group, air supply pipe group include:

Air supply header, the first end of air supply header are connected to the exhaust outlet of compressor；

Multiple gas manifolds, the first end of each gas manifold are connected to the second end of air supply header, each gas manifold Second end is connected to the gaseous coolant communication port of each first evaporator respectively；With

Multiple second on-off valves, are respectively provided at each gas manifold；On, the on-off for gas manifold where controlling.

In some embodiments, drain pipe is equipped between the liquid refrigerants communication port and the second evaporator of each first evaporator Group, drain pipe group include:

Multiple drain branch pipes, the first end of each drain branch pipe are connected to the liquid refrigerants communication port of the first evaporator；

Liquid header, the first end of liquid header are connected to the second end of each drain branch pipe, the second end of liquid header It is connected to the second evaporator；With

Multiple third on-off valves, are respectively provided at each drain branch pipe；On, the on-off for drain branch pipe where controlling.

In some embodiments, under defrost state, liquid refrigerants communication port and the first evaporator of the second evaporator The connection of liquid refrigerants communication port, the gaseous coolant communication port of the second evaporator are connected to the air entry of compressor.

In some embodiments, hot fluoridation cream system further includes liquid storage device, the liquid refrigerants circulation of liquid storage device and condenser Mouth connection, the liquid refrigerants communication port of each first evaporator communicate with the liquid storage device under refrigerating state.

In some embodiments, hot fluoridation cream system further include:

First expansion valve is located on the pipe between the liquid refrigerants communication port of the first evaporator and condenser；And/or

Second expansion valve is located at the liquid refrigerants communication port of the first evaporator and the liquid refrigerants communication port of the second evaporator Between pipe on.

In some embodiments, hot fluoridation cream system further include:

First check valve is located on the pipe between condenser and the liquid refrigerants communication port of the first evaporator, cold for making Matchmaker is from condenser to the first evaporator one-way flow；

Second one-way valve is located at the liquid refrigerants communication port of the first evaporator and the liquid refrigerants communication port of the second evaporator Between pipe on, for making refrigerant from the first evaporator to the second evaporator one-way flow；

Third check valve is located on the pipe between the gaseous coolant communication port of the second evaporator and the air entry of compressor, For making refrigerant from the second evaporator to compressor one-way flow；And/or

4th check valve is located on the pipe between the exhaust outlet of compressor and the gaseous coolant communication port of the first evaporator, For making refrigerant from compressor to the first evaporator one-way flow.

According to another aspect of the invention, it is proposed that a kind of refrigeration system, including above-described embodiment for refrigeration system Hot fluoridation cream system.

In some embodiments, refrigeration system includes freezer.

In some embodiments, the second evaporator is located at outside freezer.

In accordance with a further aspect of the present invention, it proposes a kind of to use instead based on above-mentioned in the control of the hot fluoridation cream system of refrigeration system Method processed, comprising:

Under refrigerating state, it is connected to the liquid refrigerants communication port of the first evaporator with condenser, gaseous coolant communication port It is connected to the air entry of compressor；

Under defrost state, it is connected to the liquid refrigerants communication port of the first evaporator to defrost with the second evaporator, gas State refrigerant communication port is connected to the exhaust outlet of compressor.

In some embodiments, when the first evaporator of defrost is in defrost state, further includes:

At least one of remaining first evaporator is set to be in refrigerating state.

Based on the above-mentioned technical proposal, the hot fluoridation cream system for refrigeration system of the embodiment of the present invention passes through setting the First evaporator can be evaporated to gaseous coolant in the liquid refrigerants that defrost state is discharged to add to compressor by two evaporators In, setting electric heater is eliminated by liquid refrigerants and is converted into gaseous coolant, can save electric energy；And it can be in the first evaporator It is converted into gaseous coolant in real time in the liquid refrigerants that defrost state generates, it is other in refrigeration it is not necessary that liquid refrigerants to be introduced into Defrosting can be neatly realized in first evaporator of state as needed.

Detailed description of the invention

The drawings described herein are used to provide a further understanding of the present invention, constitutes part of this application, this hair Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.In the accompanying drawings:

Fig. 1 is structural schematic diagram of the present invention for one embodiment of the hot fluoridation cream system of refrigeration system；

Fig. 2 is the operation principle schematic diagram that the shown hot fluoridation cream system for refrigeration system of Fig. 1 is in refrigerating state；

Fig. 3 is the operation principle schematic diagram that the shown hot fluoridation cream system for refrigeration system of Fig. 1 is in defrost state.

Specific embodiment

The present invention described further below.In the following paragraphs, the different aspect of embodiment is defined in more detail.So The various aspects of restriction can be combined with any other one aspect or many aspects, can not be combined unless explicitly stated otherwise.Especially, It is considered as preferred or advantageous any feature can be considered as preferred or advantageous feature group with other one or more It closes.

The invention proposes a kind of hot fluoridation cream system for refrigeration system, subsequent abbreviation " hot fluoridation cream system ", example Such as, refrigeration system can be freezer or the container with refrigerating function etc..In some embodiments, as shown in Figure 1, heat fluorination Defrosting system includes: compressor 1, condenser 2, at least two first evaporators 5 and the second evaporator 6.

Wherein, compressor 1 can be equipped with one, can also be equipped with multiple formation compressor sets, and compressor 1 can be piston Compressor, helical-lobe compressor, centrifugal compressor or linear compressor etc..Condenser 2 is used for the high temperature and pressure for generating compressor 1 Gas is condensed into liquid and is provided to each first evaporator 5, within the system, corresponding multiple first evaporators 5 of a condenser 2. Condenser 2 may be provided in and be located at outdoor or interior as needed, also settable in order to play buffer function when operating condition changes greatly Liquid storage device 3, liquid storage device 3 are connected to the liquid refrigerants communication port of condenser 2, and the liquid refrigerants communication port of each first evaporator 5 exists It is connected under refrigerating state with liquid storage device 3.

Each first evaporator 5 selectively works in refrigerating state or defrost state, and the second evaporator 6 is used for first Evaporator 5 is evaporated to the air entry that gaseous coolant is back to compressor 1 in the liquid refrigerants that defrost state generates.First evaporator 5 and second evaporator 6 be alternatively referred to as air-cooler.

The liquid refrigerants communication port of each first evaporator 5 is connected under refrigerating state with condenser 2, to make condenser 2 The liquid refrigerants of generation enters the first evaporator；The liquid refrigerants communication port of each first evaporator 5 is under defrost state with second Evaporator 6 is connected to, so that the liquid refrigerants for generating the first evaporator 5 in defrost state enters the second evaporator 6.Each first steams The gaseous coolant communication port of hair device 5 is connected under refrigerating state with the air entry of compressor 1, to generate the first evaporator 5 Low-temp low-pressure gaseous coolant enter the air entry of compressor 1；The gaseous coolant communication port of each first evaporator 5 is in defrost state It is lower to be connected to the exhaust outlet of compressor 1, changed so that the high temperature and high pressure gas for generating compressor 1 enters the first evaporator 5 Frost.

Further, under defrost state, the liquid of the liquid refrigerants communication port of the second evaporator 6 and the first evaporator 5 Refrigerant communication port connection, so that the liquid refrigerants that 5 defrost of the first evaporator generates is flow in the second evaporator 6；Second evaporator 6 Gaseous coolant communication port be connected to the air entry of compressor 1, it is straight that the liquid refrigerants that defrost is generated is converted into gaseous coolant It connects and adds in compressor 1.

The embodiment of the invention at least has one of following advantage:

1, by the second evaporator 6 of setting, the first evaporator 5 can be evaporated in the liquid refrigerants that defrost state generates Gaseous coolant eliminates setting electric heater for liquid refrigerants and is converted into gaseous coolant, can save electricity to add in compressor Energy.

2, by the second evaporator 6 of setting, the liquid refrigerants that can be generated when the first evaporator 5 is in defrost state is real When convert gaseous coolant for liquid refrigerants, it is other in refrigerating state it is not necessary that the liquid refrigerants in liquid storing barrel to be introduced into The first evaporator in first evaporator, such as other freezers can as needed flexibly without requiring other freezers working Realize defrosting in ground.

3, it is connect in the prior art due to liquid storing barrel with system low-voltage, if the liquid refrigerants in liquid storing barrel is introduced into it It is in the first evaporator of refrigerating state, and it is suitable to need to establish by the combination and complicated control logic of series of valves Pressure difference is difficult liquid refrigerant introducing other first evaporators by longer pipeline if control parameter is improper, is easy Cause the liquid that is switched on back.And the embodiment of the present invention then eliminates liquid storing barrel, the liquid refrigerants that can in real time generate defrosting gasifies, Without establishing pressure difference, more thoroughly liquid refrigerants gasification can be added in compressor, the liquid that is switched on back can be prevented.

Following working method can be used in hot fluoridation cream system of the invention.

First, each first evaporator 5 is in refrigerating state, i.e., each refrigeration system is working, such as each freezer It is in refrigerating state.

Second, when the first evaporator 5 of defrost is in defrost state, at least one of remaining first evaporator 5 place In refrigerating state.Wherein, the first evaporator 5 in defrost state can be one, two or more, while need to A few evaporator 5 is in refrigerating state, the reason is that the gas for needing that compressor 1 is made to generate high temperature and pressure by refrigeration cycle.

Each first evaporator 5 can be correspondingly arranged frost thickness detection part, when the frost layer for detecting certain the first evaporator 5 is thick When degree is more than preset thickness or when refrigerating efficiency is lower than default efficiency, first evaporator 5 can be made to enter defrost state.

Such defrost mode neither influences the normal work of other first evaporators 5, and can utilize first to work The exhaust of compressor 1 carries out defrost when evaporator 5 freezes, and can make full use of system capacity.

The piping connection relationship in hot fluoridation cream system is described below.

As shown in Figure 1, being equipped with liquid supply pipe group, feed flow between the liquid refrigerants communication port and condenser 2 of each first evaporator 5 Pipe group includes: general piping for liquids 10, multiple feed flow branch pipes and multiple first on-off valves.Wherein, the first end of general piping for liquids 10 with it is cold Condenser 2 is connected to, and the first end of each feed flow branch pipe is connected to the second end of general piping for liquids 10, the second end difference of each feed flow branch pipe It is connected to the liquid refrigerants communication port of each first evaporator 5；Each first on-off valve is respectively correspondingly located on each feed flow branch pipe, is used The on-off of feed flow branch pipe where control.

By the way that the first on-off valve is arranged on the corresponding feed flow branch pipe of each first evaporator 5, each confession can be independently controlled The on-off of liquid branch pipe, when the first evaporator 5 is in refrigerating state, feed flow branch where corresponding first on-off valve is connected, with The liquid refrigerants that condenser 2 generates is supplied to the first evaporator 5；When the first evaporator 5 is in defrost state, corresponding Feed flow branch where one on-off valve disconnects.

Still referring to FIG. 1, being equipped with gas supply between the gaseous coolant communication port of each first evaporator 5 and the exhaust outlet of compressor 1 Pipe group, air supply pipe group include: air supply header 20, multiple gas manifolds and multiple second on-off valves.Wherein, the of air supply header 20 One end is connected to the exhaust outlet of compressor 1；The first end of each gas manifold is connected to the second end of air supply header 20, each to supply The second end of branch pipe is connected to the gaseous coolant communication port of each first evaporator 5 respectively；Each second on-off valve is respectively provided at each confession On-off on gas branch pipe, for gas manifold where controlling.

By the way that the second on-off valve is arranged on the corresponding gas manifold of each first evaporator 5, each confession can be independently controlled The on-off of gas branch pipe, when the first evaporator 5 is in refrigerating state, gas manifold where corresponding second on-off valve disconnects；In When first evaporator 5 is in defrost state, gas manifold where corresponding second on-off valve is connected, by the high temperature of compressor 1 High pressure gas is provided to the first evaporator 5 to carry out defrost.

Still referring to FIG. 1, drain pipe group is equipped between the liquid refrigerants communication port of each first evaporator 5 and the second evaporator 6, Drain pipe group includes: liquid header 30, multiple drain branch pipes and multiple third on-off valves.Wherein, the first end of each drain branch pipe It is connected to the liquid refrigerants communication port of the first evaporator 5；The first end of liquid header 30 and the second end of each drain branch pipe are equal Connection, the second end of liquid header 30 are connected to the second evaporator 6；Each third on-off valve is respectively provided on each drain branch pipe, is used The on-off of drain branch pipe where control.

By the way that third on-off valve is arranged on the corresponding drain branch pipe of each first evaporator 5, each row can be independently controlled The on-off of liquid branch pipe, when the first evaporator 5 is in refrigerating state, drain branch pipe where corresponding third on-off valve disconnects；In When first evaporator 5 is in defrost state, drain branch pipe where corresponding third on-off valve is connected changes the first evaporator 5 The liquid refrigerants generated after frost is expelled to the second evaporator 6.

Still referring to FIG. 1, being equipped with return-air between the gaseous coolant communication port of each first evaporator 5 and the air entry of compressor 1 Pipe group, muffler group include: return-air general pipeline 40, multiple return-air arms and multiple 4th on-off valves.Wherein, the one of each return-air arm End is connected to the gaseous coolant communication port of each first evaporator 5, and the second end of the first end of return-air general pipeline and each return-air arm connects Logical, the second end of return-air general pipeline is connected to the air entry of compressor；Each 4th on-off valve is respectively provided in each return-air arm, is used for The on-off of return-air arm where control.

By the way that the 4th on-off valve is arranged in the corresponding return-air arm of each first evaporator 5, can independently control each time The on-off of gas branch pipe, when the first evaporator 5 is in refrigerating state, return-air arm where corresponding 4th on-off valve is connected, with The gaseous coolant for generating evaporation enters compressor 1；When the first evaporator 5 is in defrost state, corresponding 4th on-off valve Return-air arm where disconnecting, so that the high temperature and high pressure gas of 1 exhaust outlet of compressor is directly entered the first evaporator 5.

Further, as shown in Figure 1, hot fluoridation cream system of the invention may also include that the first expansion valve 77, it is located at first On pipe between the liquid refrigerants communication port and condenser 2 of evaporator 5, for throttling to the liquid refrigerants in liquid storage device 3 Decompression, to freeze into the first evaporator 5；And/or second expansion valve 78, it is located at the liquid refrigerants of the first evaporator 5 Liquid on pipe between communication port and the liquid refrigerants communication port of the second evaporator 6, for being generated to 5 defrost of the first evaporator Refrigerant carries out reducing pressure by regulating flow, to convert gaseous coolant for liquid refrigerants into the second evaporator 6.For example, the first expansion valve 77 and second expansion valve 78 temperature sensor detection refrigerant temperature can be used, and according to refrigerant temperature variable expansion valve aperture.

Further, as shown in Figure 1, hot fluoridation cream system of the invention may also include that the first check valve 81, it is located at condensation On pipe between device 2 and the liquid refrigerants communication port of the first evaporator 5, for keeping refrigerant single from 2 to the first evaporator of condenser 5 To circulation；Second one-way valve 82 is located at the liquid refrigerants communication port of the first evaporator 5 and the liquid refrigerant stream of the second evaporator 6 On pipe between port, for making refrigerant from 5 to the second evaporator of the first evaporator, 6 one-way flow；Third check valve 83, is located at On pipe between the gaseous coolant communication port of second evaporator 6 and the air entry of compressor 1, for making refrigerant from the second evaporator 6 to 1 one-way flow of compressor；And/or the 4th check valve 84, the gaseous state for being located at the exhaust outlet and the first evaporator 5 of compressor 1 are cold On pipe between matchmaker's communication port, for making refrigerant from 1 to the first evaporator of compressor, 5 one-way flow.

The safety of refrigerant flowing can be improved in the setting of above-mentioned check valve, prevents refrigerant reverse flow, improves system work Safety.

Below for two the first evaporators 5 are set in freezer, respectively the first evaporator A 51 and the first evaporation Device B 52 illustrates the working principle of hot fluoridation cream system of the present invention in conjunction with Fig. 1.

Three compressors 1 are set at the top of installation frame 1A, form compressor set, the bottom of installation frame 1A is equipped with storage Liquid device 3, condenser 2 may be provided in 3 top of liquid storage device, and the outlet of compressor 1 is equipped with gs-oil separator 4, to reduce lubricating oil with gas State refrigerant enters refrigeration cycle or defrosting circulation loop, guarantees the greasy property that compressor 1 works.

Each first evaporator 5 is correspondingly arranged a feed flow branch pipe, a gas manifold and one time liquid branch pipe.

The first end of general piping for liquids 10 is connected to by liquid storage device 3 with condenser 2, and two feed flow branch pipes include: the first feed flow The first end of branch pipe 11 and the second feed flow branch pipe 12, the first feed flow branch pipe 11 and the second feed flow branch pipe 12 with general piping for liquids 10 The second end of second end connection, the first feed flow branch pipe 11 and the second feed flow branch pipe 12 is steamed with the first evaporator A 51 and first respectively Send out the liquid refrigerants communication port connection of device B 52.First feed flow branch pipe 11 is equipped with the first on-off valve A 71, for controlling first The on-off of feed flow branch pipe 11；Second feed flow branch pipe 12 is equipped with the first on-off valve B 72, for controlling the second feed flow branch pipe 12 On-off.For example, can be electromagnetism on-off valve, manual on-off valve etc. with on-off valve cited below herein.

Further, also settable shut-off valve 84, the first check valve on the first feed flow branch pipe 11 and the second feed flow branch pipe 12 81, the first expansion valve 77 and/or filter 86, shut-off valve 84 can cut off pipeline when overhauling the first evaporator 5, in Fig. 1, the On one feed flow branch pipe 11 and the second feed flow branch pipe 12 from close to the first evaporator position, shut-off valve 85, the first check valve 81, First expansion valve 77, filter 86 and the first on-off valve 72 are set gradually.

The first end of air supply header 20 is connected to the exhaust outlet of compressor 1, and two gas manifolds include: the first gas manifold 21 and second gas manifold 22, the first end of the first gas manifold 21 and the second gas manifold 22 with air supply header 20 second End connection, second end are connected to the gaseous coolant communication port of the first evaporator A 51 and the first evaporator B 52 respectively.First supplies Gas branch pipe 21 is equipped with the second on-off valve A 73, for controlling the on-off of the first gas manifold 21；It is set on second gas manifold 22 There is the second on-off valve B 74, for controlling the on-off of the second gas manifold 22.The 4th check valve 84 is equipped on air supply header 20, Flow gaseous coolant can only from the exhaust outlet of compressor 1 to the first evaporator 5.

Two drain branch pipes include: the first drain branch pipe 31 and the second drain branch pipe 32, the first drain branch pipe 31 and second The first end of drain branch pipe 32 is connected to the liquid refrigerants communication port of the first evaporator A 51 and the first evaporator B 52 respectively；Row The first end of liquid general pipeline 30 is connected to the second end of the first drain branch pipe 31 and the second drain branch pipe 32, and the of liquid header 30 Two ends are connected to the liquid refrigerants communication port of the second evaporator 6, gaseous coolant communication port and the compressor 1 of the second evaporator 6 Air entry connection.Third on-off valve A 75 is set on first drain branch pipe 31, for controlling the on-off of the first drain branch pipe 31.In Third on-off valve B 76 is set on second drain branch pipe 32, for controlling the on-off of the second drain branch pipe 32.In the first drain branch Also settable second one-way valve 82 on pipe 31 and the second drain branch pipe 32, so that liquid refrigerants can only be from the first evaporator 5 to The flowing of two evaporators 6.

Two return-air arms include: the first return-air arm 41 and the second return-air arm 42, the first return-air arm 41 and second The first end of return-air arm 42 is connected to the gaseous coolant communication port of the first evaporator A 51 and the first evaporator B 52 respectively, is returned The first end of gas general pipeline 40 is connected to the second end of the first return-air arm 41 and the second return-air arm 42, and the second of return-air general pipeline 40 End is connected to the air entry of compressor 1；First return-air arm 41 is equipped with the 4th on-off valve A 87, for controlling the first return-air branch The on-off of pipe 41, the second return-air arm 42 is equipped with the 4th on-off valve B 88, for controlling the on-off of the second return-air arm 42.

Wherein, feed flow branch pipe second end is connected in the return-air arm between the 4th on-off valve and the first evaporator 5；Drain The first end of branch pipe is connected on the feed liquor branch pipe between the first evaporator 5 and the first on-off valve, it is preferable that is attached to first On feed liquor branch pipe between evaporator 5 and shut-off valve 85；The gaseous coolant communication port and return-air general pipeline 40 of second evaporator 6 connect It is logical.

As shown in Fig. 2, when two the first evaporators 5 are in refrigerating state, where two the first on-off valves are turned on Feed flow branch pipe, return-air arm where two the 4th on-off valves are turned on, gas manifold where two the second on-off valves disconnect, two Drain branch pipe where a third on-off valve disconnects.

Liquid refrigerants for the first evaporator A 51, as shown in refrigerant flowing lines thicker in Fig. 2, in liquid storage device 3 Enter the first feed flow branch pipe 11 by general piping for liquids 10, subsequently enters the first evaporator A 51 and be evaporated heat exchange to form gaseous state cold Matchmaker；As shown in refrigerant thinner in Fig. 2 flowing lines, gaseous coolant enters return-air general pipeline 40 by the first return-air arm 41, it Compressed afterwards into the air entry of compressor 1, compressed gas from the exhaust outlet of compressor 1 enter condenser 2 carry out it is cold It is solidifying to exchange heat and enter liquid storage gas 3.

Liquid refrigerants for the first evaporator B 52, as shown in refrigerant flowing lines thicker in Fig. 2, in liquid storage device 3 Enter the second feed flow branch pipe 12 by general piping for liquids 10, subsequently enters the first evaporator B 52 and be evaporated heat exchange to form gaseous state cold Matchmaker；As shown in refrigerant thinner in Fig. 2 flowing lines, gaseous coolant enters return-air general pipeline 40 by the second return-air arm 42, it Compressed afterwards into the air entry of compressor 1, compressed gas from the exhaust outlet of compressor 1 enter condenser 2 carry out it is cold It is solidifying to exchange heat and enter liquid storage gas 3.

As shown in figure 3, when the first evaporator A 51 is in defrost state, and the first evaporator B 52 is in refrigerating state When, the first on-off valve A 71 disconnects the first feed flow branch pipe 11, and the second on-off valve B 71 connects the second feed flow branch pipe 12；4th on-off Valve A 87 disconnects the first return-air arm 41, and the 4th on-off valve B 88 connects the second return-air arm 42；Second on-off valve A 73 is connected First gas manifold 21, the second on-off valve B 74 disconnect the second gas manifold 22；Third on-off valve A 75 connects the first drain branch Pipe 31, third on-off valve B 76 disconnect the second drain branch pipe 32.

For being in the first evaporator B 52 of refrigerating state, refrigerant flow path is thinner lines in Fig. 3, with figure 2 description it is consistent.

For being in the first evaporator A 51 of defrost state, refrigerant flow path is lines thicker in Fig. 3, compression The high pressure gaseous refrigerant that machine 1 is discharged successively passes through exhaust main 20 and first exhaust branch pipe 21 enters the first evaporator B 52 Defrost is carried out, the liquid refrigerants that defrost generates successively passes through the first drain branch pipe 31 and liquid header 30 enters the second evaporator 6 Liquid refrigerants communication port, after pervaporation gaseous coolant from the gaseous coolant communication port of the second evaporator 6 flow out, and via return The air entry of the return compressor 1 of gas general pipeline 40.

Secondly, the present invention also provides a kind of refrigeration system, the heat fluorination for refrigeration system including above-described embodiment Defrosting system.

For example, refrigeration system includes freezer.Since a condenser 2 in freezer corresponds to multiple first evaporators 5, It can not be defrosted by the way of the commutation of domestic air conditioning four-way valve to the first evaporator of part 5.Hot fluoridation cream system energy of the invention It is enough that defrosting on demand is realized in the case where saving electric energy.

For above-described embodiment, the second evaporator 6 is located at outside freezer, changes the first evaporator 5 convenient for absorbing external heat The liquid refrigerants that frost generates is converted into gaseous coolant.

Again, the present invention also provides a kind of control method of heat exchange equipment hot fluoridation cream system based on the above embodiment, In some embodiments, comprising:

Under refrigerating state, it is connected to the liquid refrigerants communication port of the first evaporator 5 with condenser 2, gaseous coolant circulation Mouth is connected to the air entry of compressor 1；

Under defrost state, it is connected to the liquid refrigerants communication port of the first evaporator 5 to defrost with the second evaporator 6, Gaseous coolant communication port is connected to the exhaust outlet of compressor 1.

Further, when the first evaporator 5 of defrost is in defrost state, further includes: make remaining first evaporator 5 At least one of be in refrigerating state.The exhaust of compressor 1 when can be freezed in this way using the first evaporator 5 to work Defrost is carried out, system capacity can be made full use of.

Above to a kind of hot fluoridation cream system, control method and refrigeration system for refrigeration system provided by the present invention It is described in detail.Principle and implementation of the present invention are described for specific embodiment used herein, with The explanation of upper embodiment is merely used to help understand method and its core concept of the invention.It should be pointed out that being led for this technology For the those of ordinary skill in domain, without departing from the principle of the present invention, can also to the present invention carry out it is several improvement and Modification, these improvements and modifications also fall within the scope of protection of the claims of the present invention.