CN214841175U - Refrigerating system - Google Patents
Refrigerating system Download PDFInfo
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- CN214841175U CN214841175U CN202120689188.0U CN202120689188U CN214841175U CN 214841175 U CN214841175 U CN 214841175U CN 202120689188 U CN202120689188 U CN 202120689188U CN 214841175 U CN214841175 U CN 214841175U
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- 238000005057 refrigeration Methods 0.000 claims abstract description 59
- 239000007788 liquid Substances 0.000 claims abstract description 51
- 239000012530 fluid Substances 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 abstract description 30
- 238000007710 freezing Methods 0.000 abstract description 12
- 230000008014 freezing Effects 0.000 abstract description 12
- 239000003507 refrigerant Substances 0.000 description 58
- 238000001704 evaporation Methods 0.000 description 15
- 230000008020 evaporation Effects 0.000 description 12
- 238000001816 cooling Methods 0.000 description 11
- 230000006835 compression Effects 0.000 description 10
- 238000007906 compression Methods 0.000 description 10
- 239000003921 oil Substances 0.000 description 10
- 230000000694 effects Effects 0.000 description 7
- 238000004378 air conditioning Methods 0.000 description 5
- 238000000926 separation method Methods 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
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Abstract
The utility model provides a refrigeration system, which comprises an outdoor unit, a first gas side pipe, a second gas side pipe and a liquid side pipe; the refrigerating system also comprises at least one indoor unit, the indoor unit comprises an indoor heat exchanger, and the indoor unit is connected and arranged between at least two of the first air side pipe, the second air side pipe and the liquid side pipe; the refrigerating system further comprises at least one cold chain module, the cold chain module comprises a second compressor and a cold chain heat exchanger, the cold chain module is connected and arranged between at least two of the first air side pipe, the second air side pipe and the liquid side pipe, and the cold chain heat exchanger can provide cold energy for cold chain products. According to the utility model discloses in effectively also integrating refrigerating system with the cold chain system, can also provide the cold volume of cold-stored freezing needs when refrigerating and heating indoor, adopt one set of refrigerating system just can solve simultaneously and refrigerate the demand of heating and cold-stored freezing demand, can not have the problem that the pipeline is too much, occupation space and administrative cost increase.
Description
Technical Field
The utility model relates to a refrigeration technology field, concretely relates to refrigerating system.
Background
Refrigeration equipment is widely used as a cold chain system such as an air conditioner in a room for cooling and heating or a refrigerator for storing food. In places requiring both air conditioning and refrigeration, such as convenience stores, multiple sets of refrigeration systems are generally required to provide both the cold storage effect and the cooling and heating effect. And one set of refrigerating system is used for realizing refrigeration and refrigeration heating at the same time, so that the space can be effectively saved, and unified management is facilitated.
Because to not only requiring the air conditioner but also requiring refrigerated place among the prior art, use many sets of refrigerating system usually, such structure exists the pipeline too much, occupation space, and technical problem such as administrative cost increase, consequently the utility model discloses research and design a refrigerating system.
SUMMERY OF THE UTILITY MODEL
Therefore, the to-be-solved technical problem of the utility model lies in overcoming among the prior art to both requiring the air conditioner and requiring cold-stored place, use many sets of refrigerating system usually, such structure exists the pipeline too much, occupation space, and the defect that administrative cost increases to a refrigerating system is provided.
In order to solve the above problems, the present invention provides a refrigeration system, which comprises an outdoor unit, a first gas side pipe, a second gas side pipe and a liquid side pipe, wherein the outdoor unit comprises a first compressor and an outdoor heat exchanger, the first gas side pipe, the second gas side pipe and the liquid side pipe are respectively communicated between an indoor side and an outdoor side, and the pressure of the first gas side pipe is greater than the pressure of the second gas side pipe;
the refrigerating system also comprises at least one indoor unit, the indoor unit comprises an indoor heat exchanger, and the indoor unit is connected and arranged between at least two of the first air side pipe, the second air side pipe and the liquid side pipe;
the refrigerating system further comprises at least one cold chain module, the cold chain module comprises a second compressor and a cold chain heat exchanger, the cold chain module is connected and arranged between at least two of the first air side pipe, the second air side pipe and the liquid side pipe, and the cold chain heat exchanger can provide cold energy for cold chain products.
In some embodiments, the refrigeration system further comprises a first branch, a second branch, a third branch, a fourth branch, and a fifth branch:
the cold chain heat exchanger is communicated to the liquid side pipe through the first branch, the other end of the cold chain heat exchanger is communicated with one end of the second branch, the other end of the second branch is communicated with one end of the third branch, the other end of the second branch is communicated with one end of the fourth branch, the other end of the third branch is communicated to the second gas side pipe, the other end of the fourth branch can be communicated to a gas suction port of the second compressor, and a gas exhaust port of the second compressor can be communicated to the first gas side pipe through the fifth branch.
In some embodiments, a first throttling device is disposed on the first branch; and a first control valve is arranged on the third branch, and a second control valve is also arranged on the fourth branch.
In some embodiments, the first control valve is a solenoid valve and the second control valve is a solenoid valve; the first throttling device is an electronic expansion valve.
In some embodiments, the cold chain module further includes an oil component, an air component, and a check valve, the oil component is further communicated between the exhaust port of the second compressor and the fifth branch, the air component is disposed on the fourth branch and is communicated with the suction port of the second compressor, the check valve is disposed on the fifth branch, and the check valve only allows fluid to flow from the exhaust port of the second compressor to the first gas side pipe.
In some embodiments, the heat exchanger is disposed on the first branch and the second branch, such that the first branch and the second branch can exchange heat in the heat exchanger.
In some embodiments, the refrigeration system further includes a mode changer, and the indoor unit is connectively disposed between at least two of the first air side duct, the second air side duct, and the liquid side duct through the mode changer.
In some embodiments, the refrigeration system further includes a sixth branch, a seventh branch, an eighth branch, a ninth branch, and a tenth branch:
one end of the indoor heat exchanger is communicated with one end of the sixth branch, the other end of the sixth branch is communicated to the mode converter, the other end of the indoor heat exchanger is communicated with one end of the seventh branch, the other end of the seventh branch is communicated to the mode converter, the mode converter is communicated to the first gas side pipe through the eighth branch, the mode converter is communicated to the second gas side pipe through the ninth branch, and the mode converter is communicated to the liquid side pipe through the tenth branch.
In some embodiments, the indoor unit further includes a second throttling device, and the sixth branch is provided with the second throttling device.
The utility model provides a pair of refrigerating system has following beneficial effect:
the utility model provides a refrigerating system is through being connected to the indoor heat exchanger including the indoor set first gas side pipe, between second gas side pipe and at least two in the liquid side pipe, still connect the cold chain heat exchanger of cold chain module simultaneously and set up in first gas side pipe, between second gas side pipe and at least two in the liquid side pipe to effectively integrate the cold chain system also to refrigerating system, can also provide the cold volume that cold-stored freezing needs when refrigerating and heating indoor, simultaneously, the cold chain module sets up independent compressor, when freezing cold-stored alone, use the compressor of refrigerating system off-premises station to refrigerate, when freezing cold-stored and indoor set refrigeration were moved simultaneously, start the compressor of cold chain system, with the evaporation temperature separate control of cold chain system and air conditioning system, satisfy the refrigeration demand of different temperature points, to the cold-stored place of both requirement air conditioner requirement, the utility model discloses a one set of refrigerating system just can solve the refrigeration simultaneously and heat the demand and cold-stored freezing demand, can not have the problem that the pipeline is too much, occupation space and administrative cost increase.
Drawings
Fig. 1 is a system configuration diagram of a refrigeration system of the present invention;
fig. 2 is a partially enlarged structural view of an outdoor unit part of fig. 1;
FIG. 3 is an enlarged fragmentary structural view of a portion of the cold chain module of FIG. 1;
fig. 4 is a partially enlarged structural view of a part of the indoor unit of fig. 1.
The reference numerals are represented as:
1. an outdoor unit; 11. a first compressor; 12. an outdoor heat exchanger; 2. an indoor unit; 21. an indoor heat exchanger; 31. a first gas-side tube; 32. a second gas-side tube; 33. a liquid side pipe; 4. a cold chain module; 41. a second compressor; 42. a cold chain heat exchanger; 43. oil content; 44. gas separation; 45. a one-way valve; 46. a heat exchanger; 101. a first branch; 102. a second branch circuit; 103. a third branch; 104. a fourth branch; 105. a fifth branch; 106. a sixth branch; 107. a seventh branch; 108. an eighth branch; 109. a ninth branch; 110. A tenth branch; 51. a first control valve; 52. a second control valve; 61. a first throttling device; 62. a second throttling device; 7. a mode converter.
Detailed Description
As shown in fig. 1 to 4, the present invention provides a refrigeration system, which comprises an outdoor unit 1, a first gas side pipe 31, a second gas side pipe 32 and a liquid side pipe 33, wherein the outdoor unit 1 comprises a first compressor 11 and an outdoor heat exchanger 12, the first gas side pipe 31, the second gas side pipe 32 and the liquid side pipe 33 are respectively communicated between the indoor side and the outdoor side, and the pressure of the first gas side pipe 31 is greater than the pressure of the second gas side pipe 32; the first gas-side pipe 31 communicates with the discharge end of the first compressor 11;
the refrigerating system also comprises at least one indoor unit 2, the indoor unit comprises an indoor heat exchanger 21, and the indoor unit 2 is connected and arranged between at least two of the first air side pipe 31, the second air side pipe 32 and the liquid side pipe 33;
the refrigerating system further comprises at least one cold chain module 4, the cold chain module comprises a second compressor 41 and a cold chain heat exchanger 42, the cold chain module 4 is connected and arranged between at least two of the first air side pipe 31, the second air side pipe 32 and the liquid side pipe 33, and the cold chain heat exchanger 42 can provide cold energy for cold chain products.
The utility model provides a refrigerating system is through being connected to the indoor heat exchanger including the indoor set first gas side pipe, between second gas side pipe and at least two in the liquid side pipe, still connect the cold chain heat exchanger of cold chain module simultaneously and set up in first gas side pipe, between second gas side pipe and at least two in the liquid side pipe to effectively integrate the cold chain system also to refrigerating system, can also provide the cold volume that cold-stored freezing needs when refrigerating and heating indoor, simultaneously, the cold chain module sets up independent compressor, when freezing cold-stored alone, use the compressor of refrigerating system off-premises station to refrigerate, when freezing cold-stored and indoor set refrigeration were moved simultaneously, start the compressor of cold chain system, with the evaporation temperature separate control of cold chain system and air conditioning system, satisfy the refrigeration demand of different temperature points, to the cold-stored place of both requirement air conditioner requirement, the utility model discloses a one set of refrigerating system just can solve the refrigeration simultaneously and heat the demand and cold-stored freezing demand, can not have the problem that the pipeline is too much, occupation space and administrative cost increase.
The utility model discloses add a cold chain system in conventional three-pipe heating recovery system, mainly include first throttling arrangement 61, cold chain heat exchanger 42, first control valve 51, second control valve 52, compressor, check valve, other auxiliary components and parts include heat exchanger, vapour and liquid separator, oil pipe, return solenoid valve all. As shown in fig. 3.
The first throttling device is used for throttling the refrigerant and providing a low-temperature and low-pressure liquid refrigerant; the cold chain heat exchanger is used for evaporating low-temperature low-pressure liquid refrigerant and providing refrigerating capacity; the heat exchanger is used for exchanging heat between the evaporated gaseous refrigerant and the liquid refrigerant before throttling, providing supercooling degree and preventing liquid return; the gas-liquid separator is used for separating gaseous refrigerant and liquid refrigerant to prevent the compressor from being damaged by liquid impact; the compressor is used for compressing gaseous refrigerant; the oil content is used for separating lubricating oil in the refrigerant, and the lubricating oil is returned to the compressor through an oil return pipeline; the check valve is used for preventing the pressure at the exhaust port of the compressor from being too high to start.
In some embodiments, the refrigeration system further includes a first branch 101, a second branch 102, a third branch 103, a fourth branch 104, and a fifth branch 105:
the cold chain heat exchanger 42 is communicated to the liquid side pipe 33 through the first branch 101, the other end of the cold chain heat exchanger 42 is communicated with one end of the second branch 102, the other end of the second branch 102 is communicated with one end of the third branch 103, the other end of the second branch 102 is also communicated with one end of the fourth branch 104, the other end of the third branch 103 is communicated to the second gas side pipe 32, the other end of the fourth branch 104 is also communicated to the gas suction port of the second compressor 41, and the gas discharge port of the second compressor 41 is communicated to the first gas side pipe 31 through the fifth branch 105.
The utility model discloses still can be connected to the liquid side pipe with the cold chain heat exchanger effectively through first branch road on, can be connected to the cold chain heat exchanger on the second gas side pipe through second branch road and third branch road, can be connected to the induction port of compressor with the cold chain heat exchanger through second branch road and fourth branch road, and be connected to the compressor gas vent through the fifth branch road on the first gas side pipe, accomplish the cold chain module with first gas side pipe, effective connection between second gas side pipe and the liquid side pipe, the realization utilizes the cold chain heat exchanger to refrigerate the refrigeration, the switch-on through the third branch road can not step up through the compression of second compressor, the switch-on through the fourth branch road can step up through the compression of second compressor.
In some embodiments, a first throttling device 61 is provided on the first branch 101; the third branch 103 is provided with a first control valve 51, and the fourth branch 104 is further provided with a second control valve 52. The utility model discloses a first throttling arrangement that sets up on the first branch road can carry out the throttle pressure reduction to the refrigerant of cold chain heat exchanger front end, and then reaches the inside evaporation heat absorption that carries out of cold chain heat exchanger, forms the refrigeration, can control the third branch road through the first control valve and switch on or close, can control the fourth branch road through the second control valve and switch on or close to control whether the second compressor inserts in the refrigeration connecting line; whether the second compressor is switched on or not depends on whether an indoor unit refrigerates in the refrigerating system, namely if the indoor heat exchanger refrigerates, the cold chain heat exchanger has insufficient cold quantity to drive the indoor heat exchanger to effectively freeze or refrigerate, so that the second compressor needs to be switched on to effectively improve the compression capacity and reduce the evaporation temperature.
In some embodiments, the first control valve 51 is a solenoid valve and the second control valve 52 is a solenoid valve; the first throttle device 61 is an electronic expansion valve. This is the utility model discloses a preferred structural style of first control valve and second control valve, the preferred electronic expansion valve of first throttling arrangement plays the effect of intelligent control throttle step-down.
In some embodiments, the cold chain module 4 further includes an oil component 43, an air component 44, and a check valve 45, the oil component 43 is further disposed in communication between the exhaust port of the second compressor 41 and the fifth branch 105, the air component 44 is disposed on the fourth branch 104 and is in communication with the suction port of the second compressor 41, the check valve 45 is disposed on the fifth branch 105, and the check valve 45 only allows fluid to flow from the exhaust port of the second compressor 41 to the first gas side pipe 31. The further preferable structure form of the cold chain module of the utility model is that the oil can be recycled to the exhaust of the second compressor through the oil separation, and the gas separation can be used for gas-liquid separation to the suction of the second compressor; the check valve can effectively prevent the high-pressure gas of the first gas side pipe from entering the exhaust port of the second compressor to form reverse flow when the second compressor is not allowed.
In some embodiments, further comprising a heat exchanger 46, said heat exchanger 46 is disposed on said first branch 101 and said second branch 102, such that said first branch 101 and said second branch 102 can exchange heat in said heat exchanger 46. The utility model discloses still can carry out the heat exchange to the refrigerant of cold chain heat exchanger front end and the refrigerant of cold chain heat exchanger rear end through heat exchanger, effectively reduce the enthalpy value of the refrigerant before the throttle step-down, improve the super-cooled rate, improve evaporation efficiency.
In some embodiments, the refrigeration system further includes a mode switch 7, and the indoor unit 2 is connected and disposed between at least two of the first air side tube 31, the second air side tube 32, and the liquid side tube 33 through the mode switch 7. This is a further preferred form of the present invention, and two pipes in the indoor unit can be led out and connected between the first air-side pipe, the second air-side pipe, and the liquid-side pipe by the mode converter.
In some embodiments, the refrigeration system further includes a sixth branch 106, a seventh branch 107, an eighth branch 108, a ninth branch 109, and a tenth branch 110:
one end of the indoor heat exchanger 21 communicates with one end of the sixth branch 106, the other end of the sixth branch 106 communicates with the mode converter 7, the other end of the indoor heat exchanger 21 communicates with one end of the seventh branch 107, the other end of the seventh branch 107 communicates with the mode converter 7, the mode converter 7 communicates with the first gas-side pipe 31 through the eighth branch 108, the mode converter 7 communicates with the second gas-side pipe 32 through the ninth branch 109, and the mode converter 7 communicates with the liquid-side pipe 33 through the tenth branch 110.
This is a further preferred connection form of the indoor unit part of the present invention, the indoor heat exchanger can be effectively connected to the mode converter through the sixth branch and the seventh branch, and the mode converter can be connected between the first air side pipe, the second air side pipe and the liquid side pipe through the eighth branch, the ninth branch and the tenth branch.
In some embodiments, the indoor unit 2 further includes a second throttling device 62, and the sixth branch 106 is provided with the second throttling device 62. The utility model discloses a setting up of second throttling arrangement can get into the indoor heat exchanger evaporation heat absorption after the refrigerant throttle step-down, or get into second throttling arrangement with the refrigerant after the indoor heat exchanger is exothermic and throttle the step-down.
The utility model relates to a refrigerating system's control method as preceding any one, it includes:
a detection step for detecting whether all the indoor heat exchangers are heating, cooling or not working;
a judging step, which is used for judging the size between the total heating requirement energy of the indoor heat exchangers used for heating and the total refrigerating requirement energy of the indoor heat exchangers used for refrigerating when at least one indoor heat exchanger is used for heating and at least one indoor heat exchanger is used for refrigerating;
and a control step, which is used for controlling whether the second compressor is started or not according to the working mode of the indoor heat exchanger and the size relation between the total heating energy and the total refrigerating energy.
This is the utility model discloses a refrigerating system's preferred control method, whether the second compressor in judging and controlling the cold chain module through indoor heat exchanger's mode and the total energy consumption (or demand) that heats promptly starts, the cold chain module sets up independent compressor, when freezing cold storage alone, use the compressor of refrigerating system off-premises station to refrigerate, when freezing cold storage and indoor set refrigeration move simultaneously, start the compressor of cold chain system, with cold chain system and air conditioning system's evaporating temperature separate control, satisfy the refrigeration demand of different temperature points, to requesting the refrigerated place again of air conditioner, the utility model discloses a one set of refrigerating system just can solve simultaneously, can not have the pipeline too much, occupation space and administrative cost increase's problem.
The utility model integrates the cold chain system into the heat recovery system through 1, so that a set of refrigeration system can provide the refrigeration effect and the refrigeration and heating effect simultaneously;
2. when the refrigeration and cold storage have requirements, different evaporation temperatures can be controlled, and the refrigeration requirements of different temperature points are met.
The problems are solved: for places requiring both air conditioning and refrigeration, multiple sets of refrigeration systems are used, so that pipelines are too many, space is occupied, and management cost is increased.
In some embodiments, when the first control valve 51 and the second control valve 52 are included:
and the control step is used for controlling the first control valve 51 to be opened, the second control valve 52 to be closed, the second compressor 41 not to be started and the first compressor 11 to be started when all the indoor heat exchangers 21 do not work, that is, the indoor heat exchangers do not have heating and cooling requirements, and the refrigerant discharged from the first compressor 11 enters the outdoor heat exchanger 12 to release heat and then enters the cold chain heat exchanger 42 to be cooled.
When the indoor unit in the system has no heating and cooling requirements, the first control valve 51 is opened, the second control valve 52 is closed, and the compressor of the cold chain system is not started. At the moment, high-temperature and high-pressure gaseous refrigerant from an exhaust port of the outdoor unit compressor enters the outdoor heat exchanger to be condensed and release heat to form intermediate-pressure liquid refrigerant, the liquid refrigerant enters the cold chain system, is throttled by the electronic expansion valve and evaporated and absorbed in the heat exchanger to provide cold energy required by the cold chain system, then becomes low-temperature and low-pressure gaseous refrigerant, and returns to the outdoor unit compressor through the low-pressure air pipe to be compressed. When the evaporation temperature required by the cold chain system is lower, the compressor of the cold chain system can be started, and the refrigeration effect is enhanced.
In some embodiments, when the first control valve 51 and the second control valve 52 are included:
the control step is used for controlling the first control valve 51 to be opened, the second control valve 52 to be closed, the second compressor 41 not to be started and the first compressor 11 to be started when all the indoor heat exchangers 21 are heating, that is, when the indoor heat exchangers 21 have no cooling demand, the refrigerant discharged from the first compressor 11 enters the indoor heat exchangers 21 needing heating to release heat, and then part of the refrigerant enters the cold chain heat exchanger 42 to be cooled and part of the refrigerant enters the outdoor heat exchanger 12 to be cooled and absorb heat.
When the internal machines in the system are all heating, the first control valve 51 is opened, the second control valve 52 is closed, and the compressor of the cold chain system is not started. At the moment, high-temperature and high-pressure gaseous refrigerant discharged from an exhaust port of the outdoor unit compressor enters the indoor heat exchanger to be condensed and released to become liquid refrigerant with intermediate pressure; part of the liquid refrigerant directly returns to the outdoor unit and is evaporated and absorbed in the outdoor heat exchanger to become a low-temperature and low-pressure gaseous refrigerant; part of liquid refrigerant enters the cold chain system, is throttled by the electronic expansion valve, evaporates and absorbs heat in the heat exchanger to provide cold energy required by the cold chain system, then becomes low-temperature and low-pressure gaseous refrigerant, returns to the outdoor unit, is converged with the evaporated gaseous refrigerant in the outdoor heat exchanger, and enters the compressor for compression. When the evaporation temperature required by the cold chain system is lower, the compressor of the cold chain system can be started, and the refrigeration effect is enhanced.
In some embodiments, the detecting step is further configured to detect an evaporation temperature of the cold chain module 4;
the judging step is also used for judging the relation between the evaporation temperature of the cold chain module 4 and the preset temperature;
the controlling step is further configured to control the second compressor 41 to be opened when the evaporation temperature is lower than the preset temperature, that is, control both the first control valve 51 and the second control valve 52 to be opened.
In some embodiments, when the first control valve 51 and the second control valve 52 are included:
the control step is used for controlling the total energy of the total heating requirement of the indoor heat exchangers 21 for heating to be greater than the total energy of the total cooling requirement of the indoor heat exchangers 21 for cooling when the refrigeration requirement exists in the indoor units in the system, the first control valve 51 is controlled to be closed, the second control valve 52 is controlled to be opened, the second compressor 41 is started, meanwhile, the first compressor 11 is controlled to start, the refrigerant discharged from the first compressor 11 enters the indoor heat exchanger 21 needing heating to release heat, then part of the refrigerant enters the indoor heat exchanger 21 needing cooling to be cooled, part of the refrigerant enters the cold chain heat exchanger 42 to be cooled, and part of the refrigerant enters the outdoor heat exchanger 12 to be cooled to absorb heat, and the refrigerant after being cooled and absorbed by the cold chain heat exchanger 42 enters the second compressor 41 for compression, and then enters the first gas-side tube 31.
The starting judgment standard of the second compressor is whether a refrigerating indoor unit and a heating indoor unit exist at the same time, if the refrigerating and refrigerating indoor units have time for refrigerating and refrigerating at the same time, the second compressor is started, and the compressor of the cold chain system plays an auxiliary role in the whole system and is used for secondary compression, so that the evaporating temperatures of the cold chain system and the air conditioner indoor unit can be independently controlled.
When the indoor unit in the system has a refrigeration demand and the heating demand is greater than the refrigeration demand, the first control valve 51 is closed, the second control valve 52 is opened, and the compressor of the cold chain system is started. At the moment, high-temperature and high-pressure gaseous refrigerant discharged from an exhaust port of an outdoor unit compressor enters an indoor heat exchanger with heating requirements to be condensed and released, and becomes intermediate-pressure liquid refrigerant; part of liquid refrigerant directly returns to the outdoor unit, is evaporated and absorbs heat in the outdoor heat exchanger to become low-temperature and low-pressure gaseous refrigerant, returns to the outdoor unit, and enters the compressor for compression; part of liquid refrigerant enters an indoor unit with refrigeration requirement, is evaporated and absorbs heat in an indoor heat exchanger to become low-temperature and low-pressure gaseous refrigerant, returns to an outdoor unit, and enters a compressor for compression; part of liquid refrigerant enters the cold chain system, is throttled by the electronic expansion valve, evaporates and absorbs heat in the heat exchanger to provide cold energy required by the cold chain system, then becomes low-temperature and low-pressure gaseous refrigerant, becomes high-temperature and high-pressure gaseous refrigerant after being compressed by the compressor of the cold chain system, and is converged with the high-temperature and high-pressure gaseous refrigerant discharged by the outdoor unit compressor.
In some embodiments, when the first control valve 51 and the second control valve 52 are included:
the control step is used for controlling the first control valve 51 to be closed, the second control valve 52 to be opened, the second compressor 41 to be started and the first compressor 11 to be started when the refrigeration requirement of the internal machine in the system exists and the total refrigeration requirement total energy of the indoor heat exchanger 21 for refrigeration is larger than the total heating requirement total energy of the indoor heat exchanger 21 for heating, part of the refrigerant discharged from the first compressor 11 enters the indoor heat exchanger 21 for heating to release heat and part of the refrigerant enters the outdoor heat exchanger 12 to release heat, then part of the refrigerant enters the indoor heat exchanger 21 for refrigeration and part of the refrigerant enters the cold chain heat exchanger 42 for refrigeration, and the refrigerant after heat absorption by the cold chain heat exchanger 42 enters the second compressor 41 for compression, and then into the first gas side tube 31.
When the cooling demand exists in the inner machine in the system and the cooling demand is larger than the heating demand, the first control valve 51 is closed, the second control valve 52 is opened, and the compressor of the cold chain system is started. At the moment, high-temperature and high-pressure gaseous refrigerant discharged from an exhaust port of the outdoor unit compressor enters the outdoor heat exchanger and the indoor heat exchanger with heating requirements to be condensed and released, and becomes liquid refrigerant with intermediate pressure; part of liquid refrigerant enters an indoor unit with refrigeration requirement, evaporates and absorbs heat in an indoor heat exchanger to become low-temperature and low-pressure gaseous refrigerant, and returns to an outdoor unit compressor for compression; part of liquid refrigerant enters the cold chain system, is throttled by the electronic expansion valve, evaporates and absorbs heat in the heat exchanger to provide cold energy required by the cold chain system, then becomes low-temperature and low-pressure gaseous refrigerant, becomes high-temperature and high-pressure gaseous refrigerant after being compressed by the compressor of the cold chain system, and is converged with the high-temperature and high-pressure gaseous refrigerant discharged by the outdoor unit compressor.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention. The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (9)
1. A refrigeration system, characterized by:
the outdoor unit (1) comprises a first compressor (11) and an outdoor heat exchanger (12), the first air side pipe (31), the second air side pipe (32) and the liquid side pipe (33) are communicated between the indoor side and the outdoor side respectively, and the pressure of the first air side pipe (31) is greater than that of the second air side pipe (32);
the refrigeration system also comprises at least one indoor unit (2), the indoor unit comprises an indoor heat exchanger (21), and the indoor unit (2) is connected and arranged between at least two of the first air side pipe (31), the second air side pipe (32) and the liquid side pipe (33);
the refrigerating system further comprises at least one cold chain module (4), the cold chain module comprises a second compressor (41) and a cold chain heat exchanger (42), the cold chain module (4) is connected and arranged between at least two of the first air side pipe (31), the second air side pipe (32) and the liquid side pipe (33), and the cold chain heat exchanger (42) can provide cold energy for cold chain products.
2. The refrigeration system of claim 1, wherein:
the refrigeration system further comprises a first branch (101), a second branch (102), a third branch (103), a fourth branch (104) and a fifth branch (105):
the cold chain heat exchanger (42) is communicated to the liquid side pipe (33) through the first branch (101), the other end of the cold chain heat exchanger (42) is communicated with one end of the second branch (102), the other end of the second branch (102) is communicated with one end of the third branch (103), the other end of the second branch (102) is also communicated with one end of the fourth branch (104), the other end of the third branch (103) is communicated to the second gas side pipe (32), the other end of the fourth branch (104) can also be communicated to a gas suction port of the second compressor (41), and a gas discharge port of the second compressor (41) can be communicated to the first gas side pipe (31) through the fifth branch (105).
3. The refrigeration system of claim 2, wherein:
a first throttling device (61) is arranged on the first branch (101); the third branch (103) is provided with a first control valve (51), and the fourth branch (104) is also provided with a second control valve (52).
4. The refrigeration system of claim 3, wherein:
the first control valve (51) is an electromagnetic valve, and the second control valve (52) is an electromagnetic valve; the first throttling device (61) is an electronic expansion valve.
5. The refrigeration system of claim 2, wherein:
the cold chain module (4) further comprises an oil component (43), an air component (44) and a check valve (45), the oil component (43) is communicated and arranged between the exhaust port of the second compressor (41) and the fifth branch (105), the air component (44) is arranged on the fourth branch (104) and communicated with the suction port of the second compressor (41), the check valve (45) is arranged on the fifth branch (105), and the check valve (45) only allows fluid to flow from the exhaust port of the second compressor (41) to the first air side pipe (31).
6. The refrigeration system according to any one of claims 2 to 5, wherein:
further comprising a heat exchanger (46), the heat exchanger (46) being arranged on the first branch (101) and the second branch (102) such that the first branch (101) and the second branch (102) are capable of exchanging heat in the heat exchanger (46).
7. The refrigeration system according to any one of claims 1 to 5, wherein:
the refrigeration system further comprises a mode converter (7), and the indoor unit (2) is connected and arranged between at least two of the first air side pipe (31), the second air side pipe (32) and the liquid side pipe (33) through the mode converter (7).
8. The refrigeration system of claim 7, wherein:
the refrigeration system further comprises a sixth branch (106), a seventh branch (107), an eighth branch (108), a ninth branch (109) and a tenth branch (110):
one end of the indoor heat exchanger (21) is communicated with one end of the sixth branch (106), the other end of the sixth branch (106) is communicated to the mode converter (7), the other end of the indoor heat exchanger (21) is communicated with one end of the seventh branch (107), the other end of the seventh branch (107) is communicated to the mode converter (7), the mode converter (7) is communicated to the first gas side pipe (31) through the eighth branch (108), the mode converter (7) is communicated to the second gas side pipe (32) through the ninth branch (109), and the mode converter (7) is communicated to the liquid side pipe (33) through the tenth branch (110).
9. The refrigeration system of claim 8, wherein:
the indoor unit (2) further comprises a second throttling device (62), and the sixth branch (106) is provided with the second throttling device (62).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120689188.0U CN214841175U (en) | 2021-04-02 | 2021-04-02 | Refrigerating system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120689188.0U CN214841175U (en) | 2021-04-02 | 2021-04-02 | Refrigerating system |
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| Publication Number | Publication Date |
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| CN214841175U true CN214841175U (en) | 2021-11-23 |
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| CN202120689188.0U Active CN214841175U (en) | 2021-04-02 | 2021-04-02 | Refrigerating system |
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| CN (1) | CN214841175U (en) |
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