CN216769651U - Heat pump EVI system suitable for low temperature air conditioner - Google Patents
Heat pump EVI system suitable for low temperature air conditioner Download PDFInfo
- Publication number
- CN216769651U CN216769651U CN202122784417.XU CN202122784417U CN216769651U CN 216769651 U CN216769651 U CN 216769651U CN 202122784417 U CN202122784417 U CN 202122784417U CN 216769651 U CN216769651 U CN 216769651U
- Authority
- CN
- China
- Prior art keywords
- valve
- compressor
- refrigerant
- way
- evaporator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
A heat pump EVI system suitable for a low-temperature air conditioner belongs to the field of indoor air conditioning. The utility model injects steam, increases the effective flow of the circulating refrigerant, improves the efficiency of the heat pump system, and solves the problem of heat production quantity decline caused by the flow reduction of the evaporator in a low-temperature environment. The main components comprise a blower, an evaporator, a temperature sensing bulb, a drying filter, a liquid storage device, an oil separator and a compressor condensing fan. When the heat pump system operates, the liquid refrigerant condensed by the condenser is exhausted by the compressor, the refrigerant of the injection loop is throttled, is gasified after being subjected to heat exchange with the refrigerant of the main loop in the economizer and absorbing heat, and enters the middle cavity of the compressor through the vapor injection port, and the refrigerant of the main loop is subjected to heat exchange and supercooling by the economizer, is throttled, enters the evaporator and is evaporated and sucked into the compressor. The system fully utilizes the injection loop to improve the working efficiency of the system, solves the problem of heat generation quantity decline caused by the flow reduction of the evaporator in a low-temperature environment, and is an energy-saving and environment-friendly heat pump EVI system.
Description
Technical Field
The utility model relates to a heat pump EVI system suitable for a low-temperature air conditioner, and belongs to the field of indoor air conditioning.
Background
With the development of human society, the utilization level of energy is higher and higher, and a heat pump is used as a device for transferring the heat energy of a low-level heat source to a high-level heat source, can obtain the heat energy with low grade from the nature, and can convert the heat energy into the heat energy with high grade by electric power acting.
The working principle of the heat pump device is consistent with that of compression type refrigeration, and in a small air conditioner, the air conditioner is used for cooling in summer or heating in winter and is completed by the same set of equipment. For example, in patent 201911108239.X heat pump system and a heat pump system control method, when a heat pump system is in a low-temperature heating starting state, a refrigerant heater is started, a compressor does not need to be preheated, the compressor is directly started at high frequency, during defrosting, the refrigerant heater is started, the exhaust temperature is increased, defrosting time is shortened, but energy is wasted due to the additional arrangement of the refrigerant heater; for example, in patent 200510101708.7, a low-temperature air conditioning heat pump system and a method for reducing regulation temperature regulation fluctuation by using the system, a compressor supplementing system is used for realizing double-stage compression, so that the refrigerating capacity and the energy efficiency ratio of a unit are improved, but the problem of improving the system efficiency under the refrigerating working condition is not considered.
When the system of the utility model is in operation, the liquid refrigerant condensed by the condenser is exhausted by the compressor, and the refrigerant of the injection loop is throttled by the throttle valve and then becomes a medium-pressure gas-liquid mixture to exchange heat with the high-temperature refrigerant liquid from the main loop in the economizer. The refrigerant liquid of the injection loop absorbs heat and then becomes gas, the gas passes through the steam injection port and enters the middle cavity of the compressor, meanwhile, the refrigerant of the main loop is subcooled through the heat exchange of the economizer and throttled into a gas-liquid mixture through the expansion valve, and the gas-liquid mixture enters the evaporator to be evaporated and then is sucked into the suction cavity of the compressor. The part of the injected vapor increases the effective flow of the circulating refrigerant, thereby effectively solving the problem of heat production quantity decline caused by the flow reduction in the evaporator under low ambient temperature and simultaneously reducing the frequency of the failure mode of overhigh discharge temperature of the compressor.
Disclosure of Invention
The utility model aims to provide a heat pump EVI system suitable for a low-temperature air conditioner.
The utility model consists of a blower (1), an evaporator (2), a system expansion valve (3), a plate-type economizer (4), an economizer expansion valve (5), a first temperature sensing bulb (6), a first ball valve (7), a drying filter (8), a second ball valve (9), a liquid storage device (10), a first one-way valve (11), a second one-way valve (12), a third one-way valve (13), a fourth one-way valve (14), a high-pressure gauge (15), a first needle valve (16), a single-pressure controller (17), a four-way reversing valve (18), an oil separator (19), a double-pressure controller (20), a second needle valve (21), a low-pressure gauge (22), a compressor (23), an oil way ball valve (24), a gas-liquid separator (25), a condenser (26), a condensing fan (27) and a second temperature sensing bulb (28);
the compressor (23) is respectively connected with the four-way reversing valve (18), the single-pressure controller (17) and the double-pressure controller (20), the single-pressure controller (17) is connected with the first needle valve (16), the first needle valve (16) is connected with the high-pressure gauge (15), the double-pressure controller (20) is connected with the low-pressure gauge (22) and the second needle valve (21), and the second needle valve (21) is connected with the compressor (23);
the four-way reversing valve (18) is respectively connected with the evaporator (2), the gas-liquid separator (25) and the oil separator (19), the evaporator (2) is connected with the second one-way valve (12), the second one-way valve (12) is connected with the liquid storage device (10), the liquid storage device (10) is connected with the second ball valve (9), the second ball valve (9) is connected with the drying filter (8), the drying filter (8) is connected with the first ball valve (7), the first ball valve (7) is connected with the plate economizer (4), the plate economizer (4) is connected with the system expansion valve (3), the system expansion valve (3) is connected with the fourth one-way valve (14), the fourth one-way valve (14) is connected with the evaporator (2), the evaporator (2) is connected with the four-way reversing valve (18), the four-way reversing valve (18) is connected with the compressor (23), the gas-liquid separator (25) is connected with an inlet of the compressor (23), the plate type economizer (4) is connected with an economizer expansion valve (5), the economizer expansion valve (5) is connected with a first ball valve (7), a system expansion valve (3) is connected with a third one-way valve (13), the third one-way valve (13) is connected with a condenser (26), an oil separator (19) is respectively connected with an oil-way ball valve (24) and the condenser (26), the oil-way ball valve (24) is connected with an inlet of a compressor (23), the condenser (26) is connected with a first one-way valve (11), the first one-way valve (11) is connected with a liquid storage device (10), a blower (1) is fixed on an evaporator (2), and a condensing fan (27) is fixed on the condenser (26);
under the refrigeration working condition, a compressor (23) is started, after a refrigerant of the compressor becomes high-temperature high-pressure vapor, the vapor of the refrigerant flows into an oil separator (19), the lubricating oil in the refrigerant is filtered and flows into a condenser (26), the filtered lubricating oil flows through an oil way ball valve (24) and flows back to the compressor (23), the vapor of the refrigerant is condensed by the condenser (26) and then becomes refrigerant liquid, the refrigerant liquid flows through a first one-way valve (11) and flows into a liquid reservoir (10) for throttling, then flows through a second ball valve (9) and flows into a drying filter (8) for processing the vapor in the refrigerant, a first part of the refrigerant flows into an economizer after flowing through a first ball valve (7), a second part of the refrigerant flows through an economizer expansion valve (5) and enters a plate type economizer (4) for partial evaporation and heat absorption, and after the temperature of the first part of the refrigerant is reduced, the refrigerant enters a medium-pressure cavity of the compressor (23) to be mixed with the refrigerant, the exhaust temperature of the compressor (23) is reduced and then the refrigerant is circulated, a first part of refrigerant flows into the evaporator (2) to be evaporated and absorb heat after flowing through the system expansion valve (3) and the fourth one-way valve (14) after being further cooled in the economizer, the air cooled by the blower (1) flows into the four-way reversing valve (18) and flows into the gas-liquid separator (25) to separate liquid refrigerant, and refrigerant vapor flows into the compressor (23) to be circulated again;
under the heating working condition, the evaporator (2) plays a role of a condenser, the condenser (26) plays a role of an evaporator, the compressor (23) is started, after the refrigerant of the compressor becomes high-temperature and high-pressure vapor, the vapor of the refrigerant flows into the evaporator (2) to be condensed and released into liquid refrigerant, the air which flows through the evaporator (2) is heated and flows through the second one-way valve (12), the air flows into the liquid storage device (10) and flows through the second ball valve (9), after the water vapor in the refrigerant is filtered out in the drying filter (8), the first part of the refrigerant flows through the first ball valve (7) and flows into the economizer, the second part of the refrigerant flows through the economizer expansion valve (5) and enters the plate economizer (4) to be partially evaporated and absorbed, after the temperature of the first part of the refrigerant is reduced, the first part of the refrigerant enters the medium-pressure cavity of the compressor (23) to be mixed with the refrigerant, the exhaust temperature of the compressor (23) is reduced and then the circulation is carried out, a first part of refrigerant flows into a condenser (26) after being cooled in the economizer and flows through a system expansion valve (3) and a third one-way valve (13) to be evaporated, then flows into an oil separator (19), lubricating oil in the refrigerant is filtered, then flows into a gas-liquid separator (25) to be separated into liquid refrigerant, and refrigerant vapor flows into a compressor (23) to be recycled.
Drawings
FIG. 1 is a schematic diagram of the present invention.
Reference designations in fig. 1: the system comprises a blower 1, a blower 2, an evaporator 3, a system expansion valve 4, a plate economizer 5, an economizer expansion valve 6, a first temperature sensing bulb 7, a first ball valve 8, a drying filter 9, a second ball valve 10, a liquid storage device 11, a first one-way valve 12, a second one-way valve 13, a third one-way valve 14, a fourth one-way valve 15, a high pressure gauge 16, a first needle valve 17, a single pressure controller 17, a four-way reversing valve 18, a four-way reversing valve 19, an oil separator 20, a double pressure controller 21, a second needle valve 22, a low pressure gauge 23, a compressor 24, an oil way ball valve 24, a 25, a gas-liquid separator 26, a condenser 27, a condensing fan 28 and a second temperature sensing bulb 28.
Detailed Description
As shown in fig. 1, a heat pump EVI system suitable for a low temperature air conditioner mainly includes a blower 1, an evaporator 2, a system expansion valve 3, a plate economizer 4, an economizer expansion valve 5, a first temperature sensing bulb 6, a first ball valve 7, a drying filter 8, a second ball valve 9, a reservoir 10, a first check valve 11, a second check valve 12, a third check valve 13, a fourth check valve 14, a high pressure gauge 15, a first needle valve 16, a single pressure controller 17, a four-way reversing valve 18, an oil separator 19, a dual pressure controller 20, a second needle valve 21, a low pressure gauge 22, a compressor 23, an oil way ball valve 24, a gas-liquid separator 25, a condenser 26, a condensing fan 27, and a second temperature sensing bulb 28.
Under the refrigeration working condition, the compressor 23 is started, refrigerant of the compressor is high-temperature and high-pressure vapor, the refrigerant vapor flows into the oil separator 19, the lubricating oil in the refrigerant is filtered and flows into the condenser 26, the filtered lubricating oil flows through the oil way ball valve 24 and flows back to the compressor 23, the refrigerant vapor is condensed by the condenser 26 to become refrigerant liquid, flows through the first one-way valve 11 and flows into the liquid reservoir 10 for throttling, then flows through the second ball valve 9 and flows into the drying filter 8 for treating the water vapor in the refrigerant, the first part of refrigerant flows through the first ball valve 7 and flows into the economizer, the second part of refrigerant flows through the economizer expansion valve 5 and enters the plate economizer 4 for partial evaporation and heat absorption, the temperature of the first part of refrigerant is reduced, the first part of refrigerant enters a medium-pressure cavity of the compressor 23 to be mixed with the refrigerant, the exhaust temperature of the compressor 23 is reduced and then is circulated, the first part of refrigerant flows through the system expansion valve 3 after being further cooled in the economizer, After the fourth check valve 14, the refrigerant flows into the evaporator 2 to evaporate and absorb heat, cools the air passing through the blower 1, flows into the four-way reversing valve 18, flows into the gas-liquid separator 25 to separate liquid refrigerant, and flows into the compressor 23 to circulate;
under the heating working condition, the evaporator 2 plays a role of a condenser, the condenser 26 plays a role of an evaporator, the compressor 23 is started, after the refrigerant of the compressor becomes high-temperature high-pressure vapor, the vapor of the refrigerant flows into the evaporator 2 to be condensed and discharged into liquid refrigerant, the air which flows through the evaporator 2 is heated and flows through the second one-way valve 12, then flows into the liquid storage device 10, flows through the second ball valve 9, after the vapor in the refrigerant is filtered out in the drying filter 8, the first part of the refrigerant flows into the economizer after flowing through the first ball valve 7, the second part of the refrigerant flows through the economizer expansion valve 5 to enter the plate economizer 4 to be partially evaporated and absorbed, after the temperature of the first part of the refrigerant is reduced, the first part of the refrigerant enters a medium-pressure cavity of the compressor 23 to be mixed with the refrigerant, the exhaust temperature of the compressor 23 is reduced and then is circulated, after the first part of the refrigerant is cooled in the economizer, the first part of the refrigerant flows through the system expansion valve 3, The third check valve 13 flows into the condenser 26, evaporates, flows into the oil separator 19, filters the lubricating oil in the refrigerant, flows into the gas-liquid separator 25, separates the liquid refrigerant, and circulates the refrigerant vapor in the compressor 23.
The system obtains higher refrigerating and heating quantity by adding an economizer loop in the traditional heat pump air conditioning system, improves the refrigerating and heating efficiency of the whole heat pump system, solves the problem of heat quantity decline caused by flow reduction in an evaporator under low ambient temperature, and reduces the frequency of failure modes with overhigh compressor exhaust temperature.
Claims (2)
1. A heat pump EVI system suitable for a low-temperature air conditioner is characterized in that:
the device comprises a blower (1), an evaporator (2), a system expansion valve (3), a plate economizer (4), an economizer expansion valve (5), a first temperature sensing bag (6), a first ball valve (7), a drying filter (8), a second ball valve (9), a liquid storage device (10), a first one-way valve (11), a second one-way valve (12), a third one-way valve (13), a fourth one-way valve (14), a high-pressure meter (15), a first needle valve (16), a single-pressure controller (17), a four-way reversing valve (18), an oil separator (19), a double-pressure controller (20), a second needle valve (21), a low-pressure meter (22), a compressor (23), an oil way ball valve (24), a gas-liquid separator (25), a condenser (26), a condensing fan (27) and a second temperature sensing bag (28);
the compressor (23) is respectively connected with the four-way reversing valve (18), the single-pressure controller (17) and the double-pressure controller (20), the single-pressure controller (17) is connected with the first needle valve (16), the first needle valve (16) is connected with the high-pressure gauge (15), the double-pressure controller (20) is connected with the low-pressure gauge (22) and the second needle valve (21), and the second needle valve (21) is connected with the compressor (23);
the four-way reversing valve (18) is respectively connected with the evaporator (2), the gas-liquid separator (25) and the oil separator (19), the evaporator (2) is connected with the second one-way valve (12), the second one-way valve (12) is connected with the liquid storage device (10), the liquid storage device (10) is connected with the second ball valve (9), the second ball valve (9) is connected with the drying filter (8), the drying filter (8) is connected with the first ball valve (7), the first ball valve (7) is connected with the plate economizer (4), the plate economizer (4) is connected with the system expansion valve (3), the system expansion valve (3) is connected with the fourth one-way valve (14), the fourth one-way valve (14) is connected with the evaporator (2), the evaporator (2) is connected with the four-way reversing valve (18), the four-way reversing valve (18) is connected with the compressor (23), the gas-liquid separator (25) is connected with an inlet of the compressor (23), the plate type economizer (4) is connected with an economizer expansion valve (5), the economizer expansion valve (5) is connected with a first ball valve (7), a system expansion valve (3) is connected with a third one-way valve (13), the third one-way valve (13) is connected with a condenser (26), an oil separator (19) is respectively connected with an oil-way ball valve (24) and the condenser (26), the oil-way ball valve (24) is connected with an inlet of a compressor (23), the condenser (26) is connected with a first one-way valve (11), the first one-way valve (11) is connected with a liquid storage device (10), a blower (1) is fixed on an evaporator (2), and a condensing fan (27) is fixed on the condenser (26).
2. A heat pump EVI system for a low temperature air conditioner as set forth in claim 1, wherein:
the refrigerant type used in the system is R407C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122784417.XU CN216769651U (en) | 2021-11-14 | 2021-11-14 | Heat pump EVI system suitable for low temperature air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122784417.XU CN216769651U (en) | 2021-11-14 | 2021-11-14 | Heat pump EVI system suitable for low temperature air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216769651U true CN216769651U (en) | 2022-06-17 |
Family
ID=81963835
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122784417.XU Active CN216769651U (en) | 2021-11-14 | 2021-11-14 | Heat pump EVI system suitable for low temperature air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216769651U (en) |
-
2021
- 2021-11-14 CN CN202122784417.XU patent/CN216769651U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103148629B (en) | Gas-liquid phase ejector synergy refrigeration system for double temperature direct cooling-type refrigerator | |
| CN106642789B (en) | Heat source tower heat pump system for realizing comprehensive utilization of solar energy and seasonal soil energy storage | |
| CN203132224U (en) | Air conditioner | |
| CN201666686U (en) | Throttling air supply system with ejectors | |
| CN101776353A (en) | Cooling tower-based solution type cold and hot water unit | |
| CN2913969Y (en) | Compression type and absorption type associated refrigerating plant | |
| CN113776215A (en) | Circulating system applied to cascade refrigeration or heat pump system and supercooling method | |
| WO2023065699A1 (en) | Adjustable combined cooling and power supply system, process thereof and operation method therefor | |
| CN111707017A (en) | Low-temperature strong-heat air source heat pump system | |
| CN103759449A (en) | Two-stage steam compression circulating system with two ejectors for efficiency enhancement | |
| CN109869940A (en) | Injecting type critical-cross carbon dioxide double-stage compressive refrigerating system | |
| CN104457019A (en) | Conventional compression heat pump/two-stage absorption compound refrigerating system with internal heat recycling | |
| WO2014168785A1 (en) | Combined vapor absorption and mechanical compression cycle design | |
| CN210089175U (en) | Jet type transcritical carbon dioxide two-stage compression refrigeration system | |
| CN111288679A (en) | Single-stage and double-stage switching evaporation supercooling ejector refrigeration heat pump circulation system | |
| CN105004095A (en) | Compound heat pump system for co-production by adopting trans-critical circle and two-stage absorption type heat pump cycle | |
| CN210089181U (en) | Absorption type transcritical carbon dioxide two-stage compression refrigeration system | |
| CN216769651U (en) | Heat pump EVI system suitable for low temperature air conditioner | |
| CN218380059U (en) | Overlapping hot fluorine defrosting type refrigeration and hot water dual supply unit | |
| CN111238079A (en) | Heat pump system with ejector | |
| CN115183517A (en) | Cascade hot fluorine defrosting type freezing and hot water dual supply unit | |
| CN112629067B (en) | Two-stage compression composite refrigeration system with parallel thermal compression and mechanical compression and method thereof | |
| CN205718040U (en) | Solar energy, geothermal energy auxiliary CO2trans-critical cycle refrigerating and heat-supplying system | |
| CN212029923U (en) | Absorption type supercooling transcritical CO2 system | |
| CN100383473C (en) | Solar-auxiliary-driven cold-heat combined generator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |