CN209944638U - Roof type gas heat pump air conditioning unit - Google Patents
Roof type gas heat pump air conditioning unit Download PDFInfo
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- CN209944638U CN209944638U CN201920549860.9U CN201920549860U CN209944638U CN 209944638 U CN209944638 U CN 209944638U CN 201920549860 U CN201920549860 U CN 201920549860U CN 209944638 U CN209944638 U CN 209944638U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
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Abstract
The utility model discloses a roof formula gas heat pump air conditioning unit, including gas engine, condenser, compressor, cross valve, expansion valve, cooling system and evaporimeter, wherein, the first interface of cross valve passes through the pipeline through compressor rather than third interface connection, and the second interface of cross valve is in proper order through the fourth interface connection of evaporimeter, expansion valve, condenser and cross valve, and gas engine is connected with the compressor in order to drive its compression refrigerant, and gas engine still is connected with cooling system in order to cool off it. The utility model provides a relatively poor shortcoming of roof formula air-cooled heat pump air conditioning unit heating effect can be overcome to roof formula gas heat pump air conditioning unit.
Description
Technical Field
The utility model relates to an air conditioning equipment technical field especially relates to a roof formula gas heat pump air conditioning unit.
Background
The roof type air-cooled heat pump air conditioning units in the existing market all use electric power as driving energy, and cool or heat air by directly evaporating a refrigerant so as to achieve the purposes of refrigerating in summer and heating in winter. Due to the inherent characteristics of the electrically driven compressor and the refrigerant, although the indoor temperature requirement can be met by refrigeration in summer, for the area with lower outdoor temperature in winter, the heating capacity of the unit is reduced along with the reduction of the outdoor temperature, and meanwhile, the heat load requirement of the indoor air conditioner is increased, so the indoor temperature requirement cannot be guaranteed.
In the area that outdoor air conditioner calculates the dry bulb temperature lower winter, in order to overcome the relatively poor shortcoming of heating effect of roof formula air-cooled heat pump air conditioning unit, the utility model discloses a use the low pressure gas as the roof formula gas heat pump air conditioning unit of power energy, this unit can both satisfy the refrigeration demand in summer, can satisfy the heating demand in the area that outdoor temperature is lower winter again; meanwhile, the unit has high comprehensive utilization efficiency of primary energy, and can reduce the peak value of power demand in summer and fill the valley for the consumption of fuel gas.
SUMMERY OF THE UTILITY MODEL
The utility model mainly aims to provide a roof type gas heat pump air conditioning unit, which aims to overcome the defect of relatively poor heating effect of the roof type air cooling heat pump air conditioning unit.
In order to achieve the above object, the present invention provides a roof type gas heat pump air conditioning unit, which comprises a gas engine, a condenser, a compressor, a four-way valve, an expansion valve, a cooling system and an evaporator,
the first interface of the four-way valve is connected with the third interface of the four-way valve through a pipeline by a compressor, the second interface of the four-way valve is sequentially connected with the fourth interface of the four-way valve by an evaporator, an expansion valve and a condenser, the gas engine is connected with the compressor to drive the compressor to compress a refrigerant, and the gas engine is also connected with a cooling system to cool the gas engine.
Preferably, the cooling system comprises a radiator provided with a circulating water channel and a heat exchanger positioned between the condenser and the four-way valve, the heat exchanger is provided with a refrigerant circulating channel and a circulating water channel, two ends of the refrigerant circulating channel of the heat exchanger are respectively connected with the condenser and the four-way valve, the gas engine is provided with the circulating water channel, the outlet of the circulating water channel of the gas engine is connected with the circulating water channel of the radiator through the circulating water channel of the heat exchanger by a pipeline to form a cooling water circulating loop, and the cooling water is antifreeze solution.
Preferably, the roof type gas heat pump air conditioning unit further comprises a flue gas heat recoverer connected with a flue gas outlet of the gas engine, the flue gas heat recoverer is provided with a circulating water channel, a circulating water channel inlet of the flue gas heat recoverer is communicated with the gas engine, and a circulating water channel outlet of the flue gas heat recoverer is communicated with the heat exchanger.
Preferably, the roof-type gas heat pump air conditioning unit further comprises a three-way valve, a first port of the three-way valve is connected with an outlet of a circulating water channel of the flue gas heat recoverer, a second port of the three-way valve is connected with an inlet of the circulating water channel of the heat exchanger, and a third port of the three-way valve is connected with a node between the radiator and the heat exchanger.
Preferably, the three-way valve is an electric three-way valve, and the opening degree of the electric three-way valve is automatically adjusted according to the cooling water temperature.
Preferably, the roof type gas heat pump air conditioning unit further comprises a cooling water pump positioned on a pipeline between the outlet of the circulating water channel of the radiator and the inlet of the circulating water channel of the gas engine; the radiator is an air-cooled radiator.
Preferably, the roof-top gas heat pump air conditioning unit further comprises a gas-liquid separator on a pipeline between the first interface of the four-way valve and the compressor.
Preferably, the components of the roof type gas heat pump air conditioning unit comprise an air supply section, an air blower section, a surface cooling section, a primary effect filtering section, a mixing section and a condensing section which are arranged in sequence, wherein,
the evaporator is arranged in the surface cooling section, the condenser is arranged in the condensation section, an air supply interface is arranged on the air supply section, an air supply machine is arranged in the air supply machine section, a return air inlet and a fresh air inlet are arranged on the mixing section, and a filtering device is arranged in the primary effect filtering section.
Preferably, an intermediate-effect filtering section is further installed between the air supply section and the air blower section.
Preferably, a humidifying section is installed between the blower section and the surface cooling section, and a humidifying device used for humidifying air is installed in the humidifying section.
The utility model provides a roof formula gas heat pump air conditioning unit to low pressure gas is the power energy, drives compressor work through gas engine operation, retrieves engine cylinder sleeve water and the heat in discharging fume when heating simultaneously, can overcome the heating quantity decay that current roof formula air-cooled heat pump air conditioning unit arouses when outdoor temperature is lower, guarantees the indoor air conditioning effect in winter. The roof type gas heat pump air conditioning unit can meet the refrigerating requirement in summer and the heating requirement in the area with lower outdoor temperature in winter; meanwhile, the unit has high comprehensive utilization efficiency of primary energy, and can reduce the peak value of power demand in summer and fill the valley for the consumption of fuel gas.
Drawings
Fig. 1 is a schematic structural diagram of a roof type gas heat pump air conditioning unit according to the present invention;
FIG. 2 is a schematic view of the refrigeration principle of the roof type gas heat pump air conditioning unit of the present invention;
fig. 3 is a schematic view of the heating principle of the roof-type gas heat pump air conditioning unit of the present invention.
In the figure, 1, an air supply section, 2, a middle-effect filtering section, 3, a middle section, 4, an air blower section, 5, a humidifying section, 6, a surface cooling section, 7, a primary-effect filtering section, 8, a mixing section, 9, a condensing section, 10, a gas engine, 11, a compressor, 12, a gas-liquid separator, 13, a four-way valve, 14, a heat exchanger, 15, a condenser, 16, a radiator, 17, an expansion valve, 18, an evaporator, 19, a cooling water pump and 20, a flue gas heat recoverer are arranged.
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It should be noted that, in the description of the present invention, the terms "lateral", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Referring to fig. 1 to 3, in the present preferred embodiment, a roof-top gas heat pump air conditioning unit includes a gas engine 10, a condenser 15, a compressor 11, a four-way valve 13, an expansion valve 17, a cooling system, and an evaporator 18, wherein,
a first interface of the four-way valve 13 is connected with a third interface thereof through a pipeline by a compressor 11, a second interface of the four-way valve 13 is connected with a fourth interface of the four-way valve 13 by an evaporator 18, an expansion valve 17 and a condenser 15 in sequence, the gas engine 10 is connected with the compressor 11 to drive the gas engine to compress refrigerant, and the gas engine 10 is also connected with a cooling system to cool the gas engine.
The gas engine 10 is connected to a gas line. The embodiment proposes a specific structure of the cooling system: the cooling system comprises a radiator 16 provided with a circulating water channel and a heat exchanger 14 positioned between a condenser 15 and a four-way valve 13, wherein the heat exchanger 14 is provided with a refrigerant circulating channel and a circulating water channel, two ends of the refrigerant circulating channel of the heat exchanger 14 are respectively connected with the condenser 15 and the four-way valve 13, the gas engine 10 is provided with the circulating water channel, the outlet of the circulating water channel of the gas engine 10 is connected with the circulating water channel of the radiator 16 through the circulating water channel of the heat exchanger 14 through a pipeline to form a cooling water circulating loop, and the cooling water adopts an antifreeze solution.
Further, the roof type gas heat pump air conditioning unit further comprises a flue gas heat recoverer 20 connected with a flue gas outlet of the gas engine 10, the flue gas heat recoverer 20 is provided with a circulating water channel, a circulating water channel inlet of the flue gas heat recoverer 20 is communicated with the gas engine 10, and a circulating water channel outlet of the flue gas heat recoverer 20 is communicated with the heat exchanger 14.
Further, the roof type gas heat pump air conditioning unit further comprises a three-way valve, a first port of the three-way valve is connected with an outlet of a circulating water channel of the flue gas heat recoverer 20, a second port of the three-way valve is connected with an inlet of a circulating water channel of the heat exchanger 14, and a third port of the three-way valve is connected with a node between the radiator 16 and the heat exchanger 14. The three-way valve is an electric three-way valve, and the opening degree of the electric three-way valve is automatically adjusted according to the temperature of the cooling water.
The roof-top gas heat pump air conditioning unit further includes a cooling water pump 19 provided on a pipeline between the outlet of the circulating water passage of the radiator 16 and the inlet of the circulating water passage of the gas engine 10. The heat sink 16 is an air-cooled heat sink. The roof-top gas heat pump air conditioning unit further comprises a gas-liquid separator 12 in a pipeline between the first port of the four-way valve 13 and the compressor 11.
The roof type gas heat pump air conditioning unit comprises an air supply section 1, a middle section 3 (for air flow equalization), an air supply section 4, a surface cooling section 6, a primary filter section 7, a mixing section 8 and a condensing section 9 which are arranged in sequence,
the evaporator 18 is arranged in the surface cooling section 6, the condenser 15 is arranged in the condensation section 9, the air supply section 1 is provided with an air supply interface, the air supply machine section 4 is provided with an air supply machine, the mixing section 8 is provided with a return air inlet and a fresh air inlet, and the primary effect filtering section 7 is provided with a filtering device.
And a middle-effect filtering section 2 is also arranged between the air supply section 1 and the air feeder section 4, and a filtering device is arranged in the middle-effect filtering section 2. A humidifying section 5 is arranged between the blower section 4 and the surface cooling section 6, and a humidifying device for humidifying air is arranged in the humidifying section 5.
The working principle of the roof type gas heat pump air conditioning unit is as follows.
Referring to fig. 2, during cooling in summer: the gas engine 10 drives the compressor 11 to operate, a low-temperature low-pressure refrigerant is compressed by the compressor 11 and then becomes a high-temperature high-pressure gas, then the high-temperature high-pressure gas passes through the four-way valve 13 and the heat exchanger 14 to reach the condenser 15 for heat dissipation, the heat-dissipated refrigerant becomes a normal-temperature high-pressure liquid, the low-temperature low-pressure gas is decompressed by the expansion valve 17, the heat in the air is absorbed by the surface cooling section 6 (namely, the evaporator 18 in fig. 2) in fig. 1, and finally the low-temperature. Indoor return air and fresh air are mixed in a mixing section 8, filtered by a primary effect filtering section 7, cooled and cooled by a surface cooling section 6, and then sent into the room by an air feeder section 4, wherein an intermediate effect filtering section 2 can be selectively installed; the air return opening is closed, and the fresh air opening is opened to form the air conditioning fresh air unit. In fig. 2, the cooling water pump 19 is operated, and the cooling water absorbs heat of the liner water and the flue gas heat recoverer 20 of the gas engine 10, flows through the electric three-way valve to the radiator 16, and dissipates heat to maintain the normal temperature of the cooling water. The gas is burned and exhausted to the atmosphere through a chimney through a flue gas heat recovery device 20.
Heating in winter: in fig. 3, the gas engine 10 drives the compressor 11 to operate, the low-temperature and low-pressure refrigerant is compressed by the compressor 11 to become high-temperature and high-pressure gas, then the high-temperature and high-pressure gas passes through the four-way valve 13 and then enters the surface cooling section 6 (i.e., the condenser 15 in fig. 3) of fig. 1 to heat the air, and the cooled refrigerant returns to the compressor 11 after absorbing heat through the expansion valve 17, the evaporator 18 and the heat exchanger 14. Indoor return air and fresh air are mixed in a mixing section 8, filtered by a primary effect filtering section 7, heated and heated by a surface cooling section 6, and then sent into the room by an air feeder section 4, wherein a humidifying section 5 and an intermediate effect filtering section 2 can be selectively installed; the air return opening is closed, and the fresh air opening is opened to form the air conditioning fresh air unit. In fig. 3, the cooling water pump 19 operates to absorb heat from cylinder liner water and the flue gas heat recovery device 20 of the gas engine 10, flows through the electric three-way valve to the heat exchanger 14 to heat the refrigerant, and then dissipates heat or bypasses the heat through the radiator 16 to maintain the normal temperature of the cooling water. The gas is burned and exhausted to the atmosphere through a chimney through a flue gas heat recovery device 20.
The comprehensive utilization efficiency of primary energy when the roof type gas heat pump air conditioning unit refrigerates is basically the same as that of the roof type air cooling heat pump air conditioning unit. The unit is controlled by a microcomputer and mainly comprises: 1. controlling the temperature (humidity) of the air supply (return air); 2. stepless speed regulation control of the engine; 3. controlling the direct current speed regulation of the fan; 4. adjusting and controlling the cooling water temperature; 5. blower frequency conversion control, and the like.
The roof type gas heat pump air conditioning unit provided by the embodiment takes low-pressure gas as power energy, the compressor 11 is driven to work by the operation of the gas engine 10, and meanwhile, the heat in the water and the smoke of the cylinder sleeve of the engine is recovered during heating, so that the problem that the heating quantity of the existing roof type air cooling heat pump air conditioning unit is attenuated when the outdoor temperature is low can be overcome, and the indoor air conditioning effect in winter is ensured. The roof type gas heat pump air conditioning unit can meet the refrigerating requirement in summer and the heating requirement in the area with lower outdoor temperature in winter; meanwhile, the unit has high comprehensive utilization efficiency of primary energy, and can reduce the peak value of power demand in summer and fill the valley for the consumption of fuel gas.
The COP value of the existing roof type air-cooled heat pump air conditioning unit for heating in winter under the national standard working condition is about 3.2, the efficiency from the common fuel gas power generation to the user side is about 0.35, and therefore the primary energy utilization rate of the fuel gas is about 1.12. When the roof type gas heat pump air conditioning unit heats in winter, except that part of the residual heat of the flue gas is not absorbed, the rest is converted into the indoor effective heat, and simultaneously the heat in the outdoor air is absorbed, so the primary energy utilization rate of the unit is about 1.40. The data analysis can obtain that the comprehensive utilization efficiency of the primary energy in the unit heating process is improved by about 25 percent. If the roof type air-cooled heat pump air conditioning unit adopts other auxiliary heating modes to ensure the heating effect in winter, the comprehensive utilization efficiency of primary energy is improved more when the roof type gas heat pump air conditioning unit heats.
The above is only the preferred embodiment of the present invention, and not the scope of the present invention, all the equivalent structural changes made by the contents of the specification and the drawings, or the direct or indirect application in other related technical fields are included in the patent protection scope of the present invention.
Claims (10)
1. A roof type gas heat pump air conditioning unit is characterized by comprising a gas engine, a condenser, a compressor, a four-way valve, an expansion valve, a cooling system and an evaporator,
the first interface of the four-way valve is connected with the third interface of the four-way valve through a pipeline by a compressor, the second interface of the four-way valve is sequentially connected with the fourth interface of the four-way valve by an evaporator, an expansion valve and a condenser, the gas engine is connected with the compressor to drive the compressor to compress a refrigerant, and the gas engine is also connected with a cooling system to cool the gas engine.
2. The roof type gas heat pump air conditioning unit as claimed in claim 1, wherein the cooling system comprises a radiator provided with a circulating water channel and a heat exchanger positioned between the condenser and the four-way valve, the heat exchanger is provided with a refrigerant circulating channel and a circulating water channel, two ends of the refrigerant circulating channel of the heat exchanger are respectively connected with the condenser and the four-way valve, the gas engine is provided with the circulating water channel, the outlet of the circulating water channel of the gas engine is connected with the circulating water channel of the radiator through the circulating water channel of the heat exchanger by a pipeline to form a cooling water circulating loop, and the cooling water is antifreeze solution.
3. The rooftop gas heat pump air conditioning unit of claim 2, further comprising a flue gas heat recovery unit connected to the flue gas discharge port of the gas engine, the flue gas heat recovery unit having a circulating water passage, an inlet of the circulating water passage of the flue gas heat recovery unit being in communication with the gas engine, and an outlet of the circulating water passage of the flue gas heat recovery unit being in communication with the heat exchanger.
4. The roof type gas heat pump air conditioning unit according to claim 3, further comprising a three-way valve, a first port of the three-way valve being connected to an outlet of the circulating water passage of the flue gas heat recovery device, a second port of the three-way valve being connected to an inlet of the circulating water passage of the heat exchanger, and a third port of the three-way valve being connected to a node between the radiator and the heat exchanger.
5. The rooftop gas heat pump air conditioning unit of claim 4, wherein the three-way valve is an electric three-way valve, and the opening degree of the electric three-way valve is automatically adjusted according to the temperature of the cooling water.
6. A roof-top gas heat pump air conditioning unit as claimed in claim 2, further comprising a cooling water pump on a circulating water passage outlet line of the radiator and a circulating water passage inlet line of the gas engine; the radiator is an air-cooled radiator.
7. The roof top gas heat pump air conditioning unit of claim 1, further comprising a gas-liquid separator in line between the first connection of the four-way valve and the compressor.
8. A roof type gas heat pump air conditioning unit as claimed in any one of claims 1 to 7, wherein the components comprise an air supply section, an air blower section, a surface cooling section, a primary effect filtering section, a mixing section and a condensing section which are arranged in sequence,
the evaporator is arranged in the surface cooling section, the condenser is arranged in the condensation section, an air supply interface is arranged on the air supply section, an air supply machine is arranged in the air supply machine section, a return air inlet and a fresh air inlet are arranged on the mixing section, and a filtering device is arranged in the primary effect filtering section.
9. A roof top gas heat pump air conditioning unit as claimed in claim 8 wherein an intermediate efficiency filter section is also mounted between the blower section and the blower section.
10. The rooftop gas heat pump air conditioning unit of claim 8, wherein a humidification section is installed between the blower section and the surface cooling section, and a humidification device for humidifying air is installed in the humidification section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201920549860.9U CN209944638U (en) | 2019-04-22 | 2019-04-22 | Roof type gas heat pump air conditioning unit |
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| CN201920549860.9U CN209944638U (en) | 2019-04-22 | 2019-04-22 | Roof type gas heat pump air conditioning unit |
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| CN209944638U true CN209944638U (en) | 2020-01-14 |
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| CN201920549860.9U Active CN209944638U (en) | 2019-04-22 | 2019-04-22 | Roof type gas heat pump air conditioning unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113686022A (en) * | 2021-08-24 | 2021-11-23 | 南京天加环境科技有限公司 | Improved gas heat pump water chiller-heater unit |
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2019
- 2019-04-22 CN CN201920549860.9U patent/CN209944638U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113686022A (en) * | 2021-08-24 | 2021-11-23 | 南京天加环境科技有限公司 | Improved gas heat pump water chiller-heater unit |
| CN113686022B (en) * | 2021-08-24 | 2023-09-08 | 南京天加环境科技有限公司 | Improved gas heat pump cold and hot water unit |
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