CN218600035U - Be suitable for frostproofing air source heat pump system of low temperature and ultra-low temperature environment - Google Patents
Be suitable for frostproofing air source heat pump system of low temperature and ultra-low temperature environment Download PDFInfo
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- CN218600035U CN218600035U CN202222986829.6U CN202222986829U CN218600035U CN 218600035 U CN218600035 U CN 218600035U CN 202222986829 U CN202222986829 U CN 202222986829U CN 218600035 U CN218600035 U CN 218600035U
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Abstract
An air source heat pump system suitable for freezing prevention in low-temperature and ultralow-temperature environments belongs to the technical field of heat pumps and comprises a chassis, a compressor, a four-way valve, an outdoor heat exchanger, an outdoor condensing fan, a drying filter, a two-way throttle valve, a gas-liquid separator and a liquid storage device; the indoor system comprises a liquid pipe stop valve, an indoor side heat exchanger and a gas pipe stop valve; the system also comprises a supercooling heat exchanger, a one-way valve A, a one-way valve B, a one-way valve C and a one-way valve D; the second port of the compressor, the outdoor heat exchanger, the one-way valve A, the supercooling heat exchanger, the drying filter, the two-way throttle valve, the one-way valve B, the liquid pipe stop valve, the indoor heat exchanger, the gas pipe stop valve, the gas-liquid separator and the first port of the compressor are sequentially connected in series through refrigerant pipelines to form a refrigerant main loop; the utility model has the advantages that: the cost is reduced, and the coating is suitable for low-temperature and ultralow-temperature environments and is antifreezing.
Description
Technical Field
The utility model relates to an air source heat pump system, in particular to be suitable for frostproofing air source heat pump system of low temperature and ultra-low temperature environment belongs to heat pump technical field.
Background
Condensed water of an air source heat pump system operating in low-temperature and ultralow-temperature environments can be condensed into ice to block a water outlet if the condensed water cannot be discharged in time, so that the ice can cause damage to a unit to different degrees due to the accumulation of the condensed water, and favorable anti-freezing measures must be reasonably taken, while the traditional design scheme is as follows: the first is to set antifreezing electric heating belt or electric heating pipe on the bottom of the outdoor machine, and the second is to insert a certain number of electric heating pipes in the heat exchange pipe at the bottom of the finned tube heat exchanger.
The disadvantages of the two design schemes are as follows: firstly, two schemes are additionally provided with control points and control logics on electrical control; secondly, the overall cost of the electric heating belt or the electric heating pipe is increased; thirdly, the voltage-resistant insulation requirement of the whole machine needs to be improved, otherwise, the danger of electric leakage and electric shock exists; the second scheme has quite obvious anti-freezing effect, but has obvious defects that the anti-freezing effect is obtained by sacrificing the heat exchange area or the heat exchanger overall dimension is increased to ensure the heat exchange effect; overall costs increase and the risk of leakage and electric shock also increases.
The traditional design is that the throttled two-phase flow refrigerant can enter the liquid separating device of the outdoor heat exchanger again through the liquid storage device and is distributed to each flow path in the heating process, the defect is that the two-phase flow refrigerant can continue to be flashed after passing through the liquid storage device, the dryness of the throttled two-phase flow is reduced, the flow resistance is increased, the distribution of the refrigerant in the next step is affected unevenly, and meanwhile, the heat exchange capacity of the heat exchanger is reduced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at among the above-mentioned prior art, defect with high costs, that the efficiency is low provides a be suitable for frostproofing air source heat pump system of low temperature and ultra-low temperature environment, can reach the cost is reduced, be applicable to low temperature and ultra-low temperature environment, frost-proof purpose.
In order to realize the purpose, the utility model adopts the technical scheme that: an air source heat pump system suitable for freezing prevention in low-temperature and ultralow-temperature environments is a single-press system and comprises an outdoor system and an indoor system; the outdoor system comprises a chassis, a compressor, a four-way valve, an outdoor heat exchanger, an outdoor condensing fan, a drying filter, a two-way throttle valve, a gas-liquid separator and a liquid storage device, wherein the outdoor condensing fan is arranged on one side of the outdoor heat exchanger; the indoor system comprises a liquid pipe stop valve, an indoor side heat exchanger and a gas pipe stop valve; the flow direction of the refrigeration working medium is controlled by a four-way valve and a two-way throttle valve;
the system also comprises a supercooling heat exchanger, a one-way valve A, a one-way valve B, a one-way valve C and a one-way valve D; the supercooling heat exchanger is arranged on the chassis;
the second port, the interface A, the interface B, the outdoor heat exchanger, the check valve A, the supercooling heat exchanger, the drying filter, the two-way throttle valve, the check valve B, the liquid pipe stop valve, the indoor heat exchanger, the air pipe stop valve, the interface C, the interface D, the gas-liquid separator and the first port of the compressor are sequentially connected in series through a refrigerant pipeline to form a refrigerant main loop; the third heat exchanger, namely the supercooling heat exchanger is used as an auxiliary condenser and is used as a supercooling device to raise the temperature of the chassis of the rack to be higher than 0 ℃, so that the condensed water is prevented from being frozen and used for preventing freezing, the condensed water of the air source heat pump system can be discharged in time, and can not be condensed into ice to block a water outlet; during refrigeration, because the circulation volume of the working medium is increased, the refrigerant stored in the liquid storage device can enter the system from the reverse direction for use under the action of pressure difference, so that the charging volume of the refrigeration system of the system is reduced;
the first port of the one-way valve B is connected with a refrigerant pipeline between the two-way throttle valve and the liquid pipe stop valve, and the connection point is E; the second port of the one-way valve C is connected with a refrigerant pipeline between the one-way valve A and the supercooling heat exchanger, and the connection point is F; the connecting point E, the one-way valve B, the liquid reservoir, the one-way valve C and the connecting point F form a bypass branch A;
the first port of the check valve D is connected with a connecting point E of a refrigerant pipeline, the second port of the check valve D is connected with the refrigerant pipeline between the connecting point F of the refrigerant pipeline and the outdoor heat exchanger, and the connecting point is G; the connection point E, the one-way valve D and the connection point G form a bypass branch B;
the air source heat pump system controls the flow direction of the refrigeration working medium by a one-way valve A, a one-way valve B, a one-way valve C and a one-way valve D;
when the refrigeration cycle runs, an outdoor heat exchanger is taken as a condenser, an indoor heat exchanger is taken as an evaporator to form a refrigeration loop, and a supercooling heat exchanger is taken as an auxiliary condenser; due to the action of the check valve D, the high-pressure liquid refrigerant which is cooled and released heat by the outdoor heat exchanger does not flow to the refrigerant pipeline at the connecting point E through the bypass branch B, and due to the action of the check valve C, the high-pressure liquid refrigerant which is cooled and released heat by the outdoor heat exchanger does not flow to the liquid storage device through the bypass branch A, but flows into the supercooling heat exchanger along the refrigerant main loop;
when the heating cycle operates, an outdoor heat exchanger is used as an evaporator, and an indoor heat exchanger is used as a condenser to form a heating loop; due to the action of the check valve B, the high-pressure liquid refrigerant which is cooled and released heat by the indoor side heat exchanger flows to the liquid storage device along the bypass branch A without passing through a refrigerant pipeline at the connecting point E after passing through the liquid pipe stop valve; due to the action of the check valve A, high-pressure liquid refrigerant which is cooled and released heat by the indoor side heat exchanger flows through the liquid pipe stop valve and the liquid storage device, does not flow to the outdoor side heat exchanger through the connecting point F, and enters the supercooling heat exchanger along the refrigerant main loop;
the device also comprises a high-voltage protection switch and a low-voltage protection switch; the high-pressure protection switch is arranged on the refrigerant main loop and between the compressor and the four-way valve; the low-pressure protection switch is arranged on the refrigerant main loop and between the gas-liquid separator and the compressor; in the process of refrigeration and heating circulation, high voltage and ultrahigh voltage or low voltage of the refrigeration system reach a set protection value, and the high-voltage switch or the low-voltage switch immediately acts to cut off the power supply to stop the refrigeration system, so that the refrigeration system is protected from being damaged.
A supercooling heat exchanger is arranged to serve as an auxiliary condenser to serve as a subcooler so as to serve as the temperature of a chassis of the lifting frame to reach 2-6 ℃.
The outdoor air conditioner is characterized by further comprising an electrical control system arranged on one side of the box body, and the outdoor system is electrically connected with the electrical control system.
It can also be designed as a double press system comprising 2 single press systems, each one completely identical to the one described above.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the supercooling heat exchanger arranged on the outdoor chassis is used as an auxiliary condenser and is used for supercooling and freezing prevention, the refrigeration/heat capacity of the system is improved, the integral design cost is not obviously increased, multiple purposes are achieved, and the problems of voltage resistance, insulation and electric leakage are not required to be solved; meanwhile, the heat area of the heat exchanger does not need to be increased, and a refrigeration system for cooling the supercooling degree can be increased, namely the air source heat pump refrigeration system of the supercooling cycle applied to the low-temperature and ultralow-temperature environment antifreezing technology.
2. The refrigerant main loop provided with the two-way throttle valve and the bypass branch provided with the liquid accumulator are adopted, the liquid accumulator is long in connecting pipeline, and the required supercooling degree is large; because the one-way valve for controlling the flow direction of the refrigerant is arranged on the bypass branch, the throttled two-phase flow refrigerant can not pass through the liquid storage device and directly enters the outdoor heat exchanger during heating, and the adverse factor is avoided.
3. According to the embodiment, the flow direction control of the refrigeration working medium is realized by only adopting the four-way valve and the plurality of one-way valves, so that the system is simplified, the cost is reduced, and meanwhile, the welding points of the system pipeline are reduced, and the leakage probability and risk are reduced.
Drawings
Fig. 1 is a schematic view of the single press system of the present invention;
FIG. 2 is a schematic diagram of the four-way valve interface A, interface B, interface C, and interface D.
Description of reference numerals: the system comprises an outdoor system 1, a compressor 101, a four-way valve 102, an A interface 102A, a B interface 102B, a C interface 102C, a D interface 102D, an outdoor heat exchanger 103, an outdoor condensing fan 104, a drying filter 105, a two-way throttle valve 106, a gas-liquid separator 107, a liquid storage device 108, a supercooling heat exchanger 109, a check valve A1010, a check valve B1011, a check valve C1012, a check valve D1013, an indoor system 2, an indoor heat exchanger 201, a liquid pipe stop valve 202, an air pipe stop valve 203, a high-pressure protection switch 3 and a low-pressure protection switch 4.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.
As shown in fig. 1 and fig. 2, an air source heat pump system suitable for freezing protection in low-temperature and ultra-low-temperature environments is a single-compressor system, and comprises an outdoor system 1 and an indoor system 2; the outdoor system 1 comprises a chassis (not shown in the figure), a compressor 101, a four-way valve 102, an outdoor heat exchanger 103, an outdoor condensing fan 104, a drying filter 105, a two-way throttle valve 106, a gas-liquid separator 107 and a liquid storage device 108, wherein the outdoor condensing fan 104 is arranged at one side of the outdoor heat exchanger 103, and the four-way valve 102 comprises an A interface 102A, a B interface 102B, a C interface 102C and a D interface 102D; the indoor system 2 comprises a liquid pipe stop valve 202, an indoor side heat exchanger 201 and a gas pipe stop valve 203; the four-way valve 102 and the two-way throttle valve 106 are used for controlling the flow direction of the refrigeration working medium;
the system also comprises a supercooling heat exchanger 109, a check valve A1010, a check valve B1011, a check valve C1012 and a check valve D1013; the supercooling heat exchanger 109 is arranged on the chassis;
the second port of the compressor 101, the interfaces a and B102A and 102B, the outdoor heat exchanger 103, the check valve a 1010, the supercooling heat exchanger 109, the drying filter 105, the two-way throttle valve 106, the check valve B1011, the liquid pipe stop valve 202, the indoor heat exchanger 201, the gas pipe stop valve 203, the interfaces C and D102D, the gas-liquid separator 107, and the first port of the compressor 101 are sequentially connected in series through a refrigerant pipeline to form a refrigerant main loop; the third heat exchanger, namely the supercooling heat exchanger 109 is arranged to serve as an auxiliary condenser and serve as a supercooling device to raise the temperature of the chassis of the rack to be higher than 0 ℃, so that condensed water is prevented from being frozen and used for preventing freezing, the condensed water of the air source heat pump system can be discharged in time, and the condensed water cannot be condensed into ice to block a water outlet; during refrigeration, because the circulation volume of the working medium is increased, the refrigerant stored in the liquid storage device 108 can enter the system from the reverse direction for use under the action of pressure difference, so that the charging volume of the system refrigeration system is reduced;
the first port of the check valve B1011 is connected with a refrigerant pipeline between the two-way throttle valve 106 and the liquid pipe stop valve 202, and the connection point is E; the second port of the check valve C1012 is connected with a refrigerant pipeline between the check valve A1010 and the supercooling heat exchanger 109, and the connection point is F; the connection point E, the check valve B1011, the reservoir 108, the check valve C1012 and the connection point F form a bypass branch A;
the first port of the check valve D1013 is connected to a connection point E of a refrigerant pipeline, and the second port of the check valve D1013 is connected to a refrigerant pipeline between the "connection point F of the refrigerant pipeline and the outdoor heat exchanger 103" and the connection point is G; the connecting point E, the one-way valve D1013 and the connecting point G form a bypass branch B;
the air source heat pump system controls the flow direction of the refrigeration working medium by a one-way valve A1010, a one-way valve B1011, a one-way valve C1012 and a one-way valve D1013;
when the refrigeration cycle is operated, the outdoor heat exchanger 103 is used as a condenser, the indoor heat exchanger 201 is used as an evaporator to form a refrigeration loop, and the supercooling heat exchanger 109 is used as an auxiliary condenser; due to the action of the check valve D1013, the high-pressure liquid refrigerant, which is cooled and released heat by the outdoor heat exchanger 103, does not flow to the refrigerant pipeline at the connection point E through the bypass branch B, and due to the action of the check valve C1012, the high-pressure liquid refrigerant, which is cooled and released heat by the outdoor heat exchanger 103, does not flow to the reservoir 108 through the bypass branch a, but enters the supercooling heat exchanger 109 along the refrigerant main loop;
when the heating cycle operates, the outdoor heat exchanger 103 is used as an evaporator, and the indoor heat exchanger 201 is used as a condenser to form a heating loop; due to the action of the check valve B1011, the high-pressure liquid refrigerant which is cooled and released heat by the indoor side heat exchanger 201 flows through the liquid pipe stop valve 202, does not pass through the refrigerant pipeline at the connection point E, and flows to the reservoir 108 along the bypass branch a; due to the action of the check valve a 1010, the high-pressure liquid refrigerant which is cooled and released heat by the indoor heat exchanger 201 flows through the liquid pipe stop valve 202 and the liquid reservoir 108, does not flow to the outdoor heat exchanger 103 through the connection point F, and instead enters the supercooling heat exchanger 109 along the refrigerant main loop;
the air source heat pump refrigerating system absorbs and emits heat by utilizing the reverse Carnot cycle principle, provides a cold/heat source for an air conditioning environment to achieve the purposes of cooling and heating, and has the following specific working process:
the refrigeration cycle is operated:
the compressor 101 outputs high-temperature and high-pressure gaseous refrigerant through a second port of the compressor 101 after being compressed, the high-temperature and high-pressure gaseous refrigerant is cooled to the outdoor heat exchanger 103 through the four-way valve 102A and the interface B102B to change heat release refrigerant into high-pressure liquid state, then enters the supercooling heat exchanger 109 arranged on an outdoor chassis through the one-way valve A1010 to further release heat and increase the supercooling degree, due to the stopping effect of the one-way valve C1012, the refrigerant directly enters the drying filter 105 without passing through the liquid reservoir 108, is changed into low-temperature and low-pressure two-phase flow refrigerant through the two-way throttle valve 106, enters the indoor heat exchanger 201 through the one-way valve B1011 and the liquid tube stop valve 202 to absorb heat for refrigeration and evaporate and vaporize into low-temperature and low-pressure gaseous refrigerant, returns to the gas-liquid separator 107 through the gas tube stop valve 203 and the four-way valve 102C and the interface D102D, and returns to the compressor 101 through a first port of the compressor 101 to perform gas compression and output the high-temperature and high-pressure gaseous refrigerant, and repeatedly circularly work, and convey a cold source indoors to achieve the refrigeration purpose;
(II) heating cycle operation:
after being compressed by the compressor 101, the high-temperature and high-pressure gaseous refrigerant is output through the second port of the compressor 101, and is released and heated to the indoor side heat exchanger 201 through the four-way valve 102A and the C interface 102C, and the refrigerant is changed into high-pressure and high-temperature liquid, because of the stopping action of the one-way valve a 1010 and the one-way valve B1011, the refrigerant can only enter the supercooling heat exchanger 109 arranged on the outdoor chassis through the liquid reservoir 108 to further release heat, so that the temperature of the chassis is raised, the freezing prevention effect is achieved in a low-temperature environment, the supercooling degree of the refrigerant is increased, the refrigeration/heat capacity of the system is raised, then the refrigerant directly enters the drying filter 105 to be changed into a low-temperature and low-pressure two-phase refrigerant through the two-way throttle valve 106, the refrigerant enters the outdoor side heat exchanger 103 through the one-way valve D1013 to absorb heat, evaporate and vaporize the low-temperature and low-pressure gaseous refrigerant, the refrigerant returns to the gas-liquid separator 107 through the four-way valve 102B and the D interface 102D, and then returns to the compressor 101 through the first port to perform gas compression, and the high-temperature and high-pressure gaseous refrigerant is output through the second port of the compressor 101, and the indoor heat source is repeatedly circulated and conveyed to achieve the purpose of heating.
The device also comprises a high-voltage protection switch 3 and a low-voltage protection switch 4; the high-pressure protection switch 3 is arranged on the refrigerant main loop and between the compressor 101 and the four-way valve 102; the low-pressure protection switch 4 is arranged on the refrigerant main loop and between the gas-liquid separator 107 and the compressor 101; in the process of refrigeration and heating circulation, high voltage and ultrahigh voltage or low voltage of the refrigeration system reach a set protection value, and the high-voltage switch or the low-voltage switch immediately acts to cut off the power supply to stop the refrigeration system, so that the refrigeration system is protected from being damaged.
The supercooling heat exchanger 109 is arranged to serve as an auxiliary condenser for a subcooler to raise the temperature of the chassis of the frame to 2-6 ℃.
And the outdoor system 1 is electrically connected with an electrical control system (not shown in the figure) arranged on one side of the box body.
The above-mentioned embodiments are only preferred embodiments of the present invention, and the ordinary changes and substitutions performed by those skilled in the art within the scope of the technical solution of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. An anti-freezing air source heat pump system suitable for low-temperature and ultralow-temperature environments is a single-press system and comprises an outdoor system and an indoor system; the outdoor system comprises a chassis, a compressor, a four-way valve, an outdoor heat exchanger, an outdoor condensing fan, a drying filter, a two-way throttle valve, a gas-liquid separator and a liquid storage device, wherein the outdoor condensing fan is arranged on one side of the outdoor heat exchanger; the indoor system comprises a liquid pipe stop valve, an indoor side heat exchanger and a gas pipe stop valve; the flow direction of the refrigeration working medium is controlled by a four-way valve and a two-way throttle valve, and the refrigeration working medium is characterized in that:
the system also comprises a supercooling heat exchanger, a one-way valve A, a one-way valve B, a one-way valve C and a one-way valve D; the supercooling heat exchanger is arranged on the chassis;
the second port, the interface A, the interface B, the outdoor heat exchanger, the one-way valve A, the supercooling heat exchanger, the drying filter, the two-way throttle valve, the one-way valve B, the liquid pipe stop valve, the indoor heat exchanger, the air pipe stop valve, the interface C and the interface D of the compressor, the gas-liquid separator and the first port of the compressor are sequentially connected in series through refrigerant pipelines to form a refrigerant main loop;
the first port of the one-way valve B is connected with a refrigerant pipeline between the two-way throttle valve and the liquid pipe stop valve, and the connection point is E; the second port of the one-way valve C is connected with a refrigerant pipeline between the one-way valve A and the supercooling heat exchanger, and the connection point is F; the connecting point E, the one-way valve B, the liquid reservoir, the one-way valve C and the connecting point F form a bypass branch A;
the first port of the check valve D is connected with a connecting point E of a refrigerant pipeline, the second port of the check valve D is connected with the refrigerant pipeline between the connecting point F of the refrigerant pipeline and the outdoor heat exchanger, and the connecting point is G; the connection point E, the one-way valve D and the connection point G form a bypass branch B;
the air source heat pump system controls the flow direction of the refrigeration working medium by using a one-way valve A, a one-way valve B, a one-way valve C and a one-way valve D.
2. The air source heat pump system suitable for freezing protection in low-temperature and ultra-low-temperature environments as claimed in claim 1, wherein: the device also comprises a high-voltage protection switch and a low-voltage protection switch; the high-voltage protection switch is arranged on the refrigerant main loop and between the compressor and the four-way valve; the low-pressure protection switch is arranged on the refrigerant main loop and between the gas-liquid separator and the compressor.
3. The air source heat pump system suitable for freezing protection in low-temperature and ultra-low-temperature environments as claimed in claim 1, wherein: the supercooling heat exchanger is used as an auxiliary condenser and used as a subcooler to raise the temperature of a chassis of the frame to 2-6 ℃.
4. The air source heat pump system suitable for freezing protection in low-temperature and ultra-low-temperature environments as claimed in claim 1, wherein: the outdoor air conditioner further comprises an electrical control system arranged on one side of the box body, and the outdoor system is electrically connected with the electrical control system.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222986829.6U CN218600035U (en) | 2022-11-08 | 2022-11-08 | Be suitable for frostproofing air source heat pump system of low temperature and ultra-low temperature environment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222986829.6U CN218600035U (en) | 2022-11-08 | 2022-11-08 | Be suitable for frostproofing air source heat pump system of low temperature and ultra-low temperature environment |
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| CN218600035U true CN218600035U (en) | 2023-03-10 |
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| CN202222986829.6U Active CN218600035U (en) | 2022-11-08 | 2022-11-08 | Be suitable for frostproofing air source heat pump system of low temperature and ultra-low temperature environment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113758048A (en) * | 2021-08-12 | 2021-12-07 | 深圳市派沃新能源科技股份有限公司 | Air energy heat pump low-temperature protection system |
-
2022
- 2022-11-08 CN CN202222986829.6U patent/CN218600035U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113758048A (en) * | 2021-08-12 | 2021-12-07 | 深圳市派沃新能源科技股份有限公司 | Air energy heat pump low-temperature protection system |
| CN113758048B (en) * | 2021-08-12 | 2024-04-19 | 深圳市派沃新能源科技股份有限公司 | Air source heat pump low temperature protection system |
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