Air-cooling cold-storage composite refrigeration device
By designing an air-cooled cold storage composite refrigeration device, combining the refrigeration system and the cold storage system, the problem of complex structure, low reliability, and high power consumption of the refrigeration device in special equipment is solved, and flexible control of electric heating is achieved, improving the reliability of the system. sex and efficiency.
Patent Information
- Application Number
- CN202411690750.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-25
- Publication Date
- 2025-01-24
AI Technical Summary
Two independent refrigeration devices are used in existing special equipment, resulting in complex structure, low reliability, large electrical power, and the electrical heating method cannot be turned on and off.
A kind of cold -cooling and refrigeration composite refrigeration device is designed, including the refrigeration system and cooling system. The compressor, condenser, liquid storage, evaporator and other components in the refrigeration system realize the cooling and refrigeration. , Pumps and other components to achieve cooling and cooling, and use PTC electric heater to achieve flexible control of electric heating.
When it is needed, the wind is cold and cooling, when not needed, the cooling and cooling, simplifying the structure, reducing costs and electricity power, improving reliability, and electric heating can be stopped.
Smart Images
Figure CN119353812A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of refrigeration devices for special equipment, in particular to an air-cooled cold storage composite refrigeration device. Background Art
[0002] The refrigeration device for air and liquid cooling of special equipment requires cooling of different spaces and equipment, and the cooling forms are different. Some spaces, such as the cab, are cooled by air cooling, and other heating equipment needs to be cooled by low-temperature coolant. At present, two independent refrigeration devices are used for refrigeration devices for air and liquid cooling. This design has many components, complex pipelines, high cost, low reliability, and high power consumption. Since special equipment is powered by oil engines, the power it can provide is limited, and it is difficult to meet the power requirements of two independent refrigeration devices at the same time.
[0003] In addition, currently there are heat pump heating, fuel heating, and electric heating. Usually, since the air conditioning heating devices of various special equipment (such as vehicles) need to work in low-temperature environments outdoors, higher requirements are placed on the air conditioning heating devices. However, the heating effect of heat pump heating is very poor at low temperatures of -45°C; fuel heaters need to add corresponding fin heat exchangers, which have a more complex structure, more failure points, and low reliability; electric heating uses the Joule effect of electric current to convert electrical energy into thermal energy to heat the air flowing through the heater, and the electric heating tube and the heat exchanger are tightly connected together, but the electric heating tube cannot be turned on and off at will. Summary of the invention
[0004] The present invention provides an air-cooled cold storage composite refrigeration device to solve the problems of complex structure, low reliability and high power consumption of two sets of independent refrigeration devices used in the prior art special equipment, and the problem that the electric heating method cannot be started and stopped at will.
[0005] In order to achieve the above object, the technical solution adopted by the present invention is: An air-cooled cold storage composite refrigeration device comprises a refrigeration system and a cold storage system; the refrigeration system comprises a compressor (101), a condenser (102) equipped with a condensing fan (3), a liquid storage device (103), a solenoid valve (106), an expansion valve (107), an evaporator (108) equipped with an evaporating air duct unit (2), a gas-liquid separator (109), a solenoid valve (110), an expansion valve (111), and a plate heat exchanger (112); In a refrigeration system, the outlet of a compressor (101) is connected to the inlet of a condenser (102) through a pipeline, the outlet of the condenser (102) is connected to the inlet of a liquid storage device (103) through a pipeline, the outlet of the liquid storage device (103) is connected to the inlet of a solenoid valve (106) through a pipeline, the outlet of the solenoid valve (106) is connected to the inlet of an expansion valve (107) through a pipeline, the outlet of the expansion valve (107) is connected to the inlet of an evaporator (108) through a pipeline, the outlet of the evaporator (108) is connected to the inlet of a gas-liquid separator (109) through a pipeline, and the outlet of the gas-liquid separator (109) is connected to the compressor (101) through a pipeline. The outlet of the liquid storage device (103) is also connected to the inlet of the second solenoid valve (110) through a pipeline, and the second solenoid valve (110) and the first solenoid valve (106) are interlocked, and the outlet of the second solenoid valve (110) is connected to the inlet of the second expansion valve (111) through a pipeline; the plate heat exchanger (112) has two groups of flow channels, the outlet of the second expansion valve (111) is connected to the inlet of the first group of flow channels of the plate heat exchanger (112) through a pipeline, and the outlet of the first group of flow channels of the plate heat exchanger (112) is connected to the inlet of the gas-liquid separator (109) through a pipeline; The cold storage system comprises a cold storage box (201) and a water pump (204); the outlet of the cold storage box (201) is connected to the inlet of the second group of flow channels of the plate heat exchanger (112) via a pipeline; the outlet of the second group of flow channels of the plate heat exchanger (112) is connected to the inlet of the water pump (204) via a pipeline; and the outlet of the water pump (204) is connected to the return port of the cold storage box (201) via a pipeline.
[0006] Furthermore, in the refrigeration system, solenoid valve one (106) is a normally closed solenoid valve, and solenoid valve two (110) is a normally open solenoid valve.
[0007] Furthermore, in the refrigeration system, a PTC electric heater (3) is installed on the air inlet side of the evaporator (108), and an external controller is electrically connected to the PTC electric heater (3).
[0008] Furthermore, in the refrigeration system, a pressure sensor (116) is installed on the inlet pipeline of the liquid storage device (103) through a second needle valve (115), and a pressure protector (114) is installed on the inlet pipeline of the gas-liquid separator. The pressure sensor (116) and the pressure protector (114) are respectively electrically connected to an external controller.
[0009] Furthermore, in the refrigeration system, the air inlet side of the evaporator (108) is provided with a temperature sensor 1 (117), the evaporator (108) is provided with a temperature sensor 2 (118), and the condenser (102) is provided with a temperature sensor 3 (109), and the temperature sensor 1 (117), the temperature sensor 2 (118), and the temperature sensor 3 (109) are respectively electrically connected to an external controller.
[0010] Furthermore, in the cold storage system, the inlet pipeline of the water pump (204) is connected to the first stop valve (202), and the outlet pipeline of the water pump (204) is connected to the second stop valve (205).
[0011] Furthermore, in the cold storage system, the water storage tank (201) is provided with a temperature sensor (209) and a photoelectric liquid level switch, and the temperature sensor (209) and the photoelectric liquid level switch are respectively electrically connected to an external controller.
[0012] The present invention adopts the combination of refrigeration and cold storage, which can be air-cooled when air cooling is needed, and cold storage refrigeration works as liquid storage tank cold storage when air cooling is not needed. This kind of adjustment is simple, low cost and high reliability. In addition, the present invention adopts PTC electric heater, which can realize that the fan can be stopped immediately when the electric heating stops.
[0013] Compared with the prior art, the present invention has the following advantages: 1) The present invention uses fewer components, fewer connecting pipelines, simple structure, and convenient control.
[0014] 2) The present invention can realize air cooling and cold storage cooling, and the air cooling and cold storage cooling are interlocked, realizing the requirements of air cooling and cold storage cooling, and solving the problem of power consumption.
[0015] 3) The present invention selects a normally closed solenoid valve 1 and a normally open solenoid valve 2, thereby avoiding frequent operation of the solenoid valve 1 and the solenoid valve 2, and interlocking of the solenoid valve 1 and the solenoid valve 2, thereby solving the problem of reliable cold storage without air cooling.
[0016] 4) The present invention uses PTC electric heating to stop electric heating, and the fan can be stopped immediately.
[0017] 5) The present invention adopts a photoelectric liquid level switch alarm, which is simple and reliable.
[0018] 6) The pressure sensor of the present invention is fixed on the needle valve, which is convenient for the maintenance and repair of the pressure sensor. The evaporator outlet branch enters the needle valve through the pipeline, which is convenient for the system to be charged with refrigerant.
[0019] 7) The pressure protector installed in the present invention can effectively protect the refrigeration system, which is safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a structural principle diagram of an embodiment of the present invention. DETAILED DESCRIPTION
[0021] The present invention is further described below in conjunction with the accompanying drawings and embodiments.
[0022] like Figure 1As shown, this embodiment discloses an air-cooled cold storage composite refrigeration device, including a refrigeration system and a cold storage system, wherein: The refrigeration system includes a compressor 101, a condenser 102 equipped with a condensing fan 3, a liquid storage tank 103, a filter 104, a sight glass 105, a solenoid valve 106, an expansion valve 107, an evaporator 108 equipped with an evaporating air duct machine 2, a gas-liquid separator 109, a solenoid valve 110, an expansion valve 111, and a plate heat exchanger 112. The solenoid valve 106 is a normally closed solenoid valve, the solenoid valve 110 is a normally open solenoid valve, and the solenoid valve 106 and the solenoid valve 110 are interlocked. The plate heat exchanger 112 has two sets of flow channels, and the media flowing in the two sets of flow channels are heat exchanged through the plate heat exchanger 112 body.
[0023] In the refrigeration system, the outlet of the compressor 101 is connected to the inlet of the condenser 102 through a pipeline, a temperature sensor 119 is arranged on the air inlet side of the condenser 102, the outlet of the condenser 102 is connected to the inlet of the liquid reservoir 103 through a pipeline, and a pressure sensor 116 is installed on the inlet pipeline of the liquid reservoir 103 through a bypass of a needle valve 115, and the needle valve 115 facilitates the maintenance and repair of the pressure sensor 116.
[0024] The outlet of the liquid reservoir 103 is connected to the inlet of the filter 104 through a pipeline, the outlet of the filter 104 is connected to the inlet of the sight glass 105 through a pipeline, and the outlet of the sight glass 105 is connected to the inlet of the solenoid valve 106 through a pipeline, so that the outlet of the liquid reservoir 103 is connected to the inlet of the solenoid valve 106 through the filter 104 and the sight glass 105. The outlet of the solenoid valve 106 is connected to the inlet of the expansion valve 107 through a pipeline, and the outlet of the expansion valve 107 is connected to the inlet of the evaporator 108 through a pipeline. The air inlet side of the evaporator 108 is installed with a PTC electric heater 3 and a temperature sensor 117, and the coil of the evaporator 108 is installed with a temperature sensor 2 118, and the outlet of the evaporator 108 is connected to the inlet of the gas-liquid separator 109 through a pipeline.
[0025] The outlet of the gas-liquid separator 109 is connected to the return port of the compressor 101 through a pipeline. A pressure protector 114 is installed in the pipeline between the return port of the compressor 101 and the outlet of the gas-liquid separator 109. The shutdown of the refrigeration compressor 101 is controlled by the pressure protector 114, which effectively prevents the compressor 101 from idling without refrigerant. In addition, a needle valve 113 is also bypassed in the pipeline between the return port of the compressor 101 and the outlet of the gas-liquid separator 109 to facilitate the system to be charged with refrigerant.
[0026] The outlet of the sight glass 105 is also connected to the inlet of the second solenoid valve 110 through another pipeline, so that the outlet of the liquid storage 103 is also connected to the inlet of the second solenoid valve 110 through the filter 104 and the sight glass 105. The outlet of the second solenoid valve 110 is connected to the inlet of the second expansion valve 111 through a pipeline, and the outlet of the second expansion valve 111 is connected to the inlet of the first group of flow channels of the plate heat exchanger 112 through a pipeline, and the outlet of the first group of flow channels of the plate heat exchanger 112 is connected to the inlet of the gas-liquid separator 109 through a pipeline.
[0027] The cold storage system includes a cold storage tank 201, a stop valve 1 202, a filter 203, a water pump 204, and a stop valve 2 205. A photoelectric liquid level switch 2 207 is installed at the upper part of the cold storage tank 201, a photoelectric liquid level switch 1 206 is installed at the lower part of the water storage tank 201, an automatic exhaust valve 208 is installed at the top of the water storage tank 201, and a temperature sensor 209 is also installed inside the water storage tank 201. The outlet of the water storage tank 201 is connected to the inlet of the second group of flow channels of the plate heat exchanger 112 in the refrigeration system through a pipeline, the outlet of the second group of flow channels of the plate heat exchanger 112 is connected to the inlet of the stop valve 1 202 through a pipeline, the outlet of the stop valve 1 202 is connected to the inlet of the filter 203 through a pipeline, the outlet of the filter 203 is connected to the inlet of the water pump 204 through a pipeline, the outlet of the water pump 204 is connected to the inlet of the stop valve 2 205 through a pipeline, and the outlet of the stop valve 205 is connected to the return port of the cold storage tank 201 through a pipeline.
[0028] In this embodiment, the pressure sensor 116, the pressure protector 114, the temperature sensor 1 117, the temperature sensor 2 118, the temperature sensor 3 109 of the refrigeration system, and the temperature sensor 209, the photoelectric liquid level switch 1 206, and the photoelectric liquid level switch 2 207 of the cold storage system are respectively electrically connected to the external controller for signal transmission. The external controller is also electrically connected to the PTC electric heater 3 in the refrigeration system.
[0029] This embodiment has an air-cooling refrigeration mode and a cold-storage refrigeration mode.
[0030] In air-cooled refrigeration mode, solenoid valve 106 is opened and solenoid valve 2 110 is closed, and the refrigerant of compressor 101 flows as follows: compressor 101 → condenser 102 → liquid storage tank 103 → filter 104 → sight glass 105 → solenoid valve 106 → expansion valve 107 → evaporator 108 → gas-liquid separator 109 → compressor 101. At this time, the refrigerant exchanges heat with the outside through the condensing fan 3 configured in the condenser 102, and then continues to cool down through the expansion valve 107 before entering the evaporator 108. The evaporating fan 2 configured in the evaporator 108 works to realize heat exchange between the refrigerant and the indoor air of the special equipment, thereby realizing refrigeration.
[0031] In the cold storage refrigeration mode, the solenoid valve 106 is closed, the solenoid valve 2 110 is opened, and the refrigerant of the compressor 101 flows as follows: compressor 101 → condenser 102 → liquid storage tank 103 → filter 104 → sight glass 105 → solenoid valve 2 110 → expansion valve 2 111 → the first group of flow channels of the plate heat exchanger 112 → gas-liquid separator 109 → compressor 101. At this time, the cold storage system is working, and the coolant in the cold storage tank 201 flows as follows: cold storage tank 201 → the second group of flow channels of the plate heat exchanger 112 → stop valve 1 202 → filter 203 → water pump 204 → stop valve 2 205 → cold storage tank 201. In the cold storage refrigeration mode, the refrigerant performs heat exchange with the coolant output by the cold storage system in the plate heat exchanger 112, thereby realizing the cold storage refrigeration of the cold storage tank by removing the temperature of the coolant.
[0032] When the air-cooling refrigeration mode needs to be turned on, the cold storage refrigeration mode is turned off; when the cold storage refrigeration mode needs to be turned on, the air-cooling refrigeration mode is turned off. The compressor 101, condenser 102, liquid storage tank 103, filter 104, sight glass 105, gas-liquid separator 109, and condensing fan 1 are shared by air-cooling refrigeration and cold storage refrigeration, with a small number of components, few connecting pipes, simple structure, and convenient control. It also realizes the requirements of air-cooling and cold storage cooling, and solves the problem of power consumption. The selection of normally closed solenoid valve 1 106 and normally open solenoid valve 2 110 avoids frequent operation of solenoid valve 1 106 and solenoid valve 2 110, solves the two-way interlocking in the system circuit, and solves the reliable cold storage when air cooling is not required.
[0033] The load start and stop sequence of the system in this embodiment is as follows: air cooling is started in the order of evaporator fan 2, solenoid valve 106, condenser fan 1, and compressor 101, and the order of shutdown is the opposite. Cold storage refrigeration is started by water pump 204, and the cold storage refrigeration system is started in the order of condenser fan 1 and compressor 101, and the order of shutdown is the opposite. This avoids system failure, solves the problem of oil return of the compressor, and improves the reliability of the system.
[0034] During the heating operation of this embodiment, the air transported by the evaporating fan 2 is heated by the PTC electric heater. The electric heating can be stopped by the PTC electric heater, and the fan can be stopped immediately without delaying the evaporating fan 2 during power outage heating.
[0035] In this embodiment, the cold storage box 201 can also perform drainage work through the drainage valve 210.
[0036] In this embodiment, photoelectric liquid level switch 1 206 and photoelectric liquid level switch 207 are placed on the cold storage box 201. Photoelectric liquid level switch 1 206 and photoelectric liquid level switch 207 sense different liquid levels in the cold storage box 201. When the liquid level is too high or too low, the photoelectric liquid level switch alarm is simple and reliable.
[0037] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. The embodiments described in the present invention are merely descriptions of the preferred embodiments of the present invention, and do not limit the concept and scope of the present invention. The various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction, and such combinations should also be regarded as the contents disclosed in the present disclosure as long as they do not violate the concept of the present invention. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.
[0038] The present invention is not limited to the specific details of the above-mentioned embodiments. Within the technical concept of the present invention and without departing from the design concept of the present invention, various modifications and improvements made to the technical solution of the present invention by technical personnel in this field should fall within the protection scope of the present invention. The technical contents for which protection is sought in the present invention have been fully recorded in the claims.
Claims
1. Air-cooled cold storage compound refrigeration device, characterized in that: It comprises a refrigeration system and a cold storage system; the refrigeration system comprises a compressor (101), a condenser (102) equipped with a condensing fan (3), a liquid storage device (103), a solenoid valve (106), an expansion valve (107), an evaporator (108) equipped with an evaporating air duct unit (2), a gas-liquid separator (109), a solenoid valve (110), an expansion valve (111), and a plate heat exchanger (112); In a refrigeration system, the outlet of a compressor (101) is connected to the inlet of a condenser (102) through a pipeline, the outlet of the condenser (102) is connected to the inlet of a liquid storage device (103) through a pipeline, the outlet of the liquid storage device (103) is connected to the inlet of a solenoid valve (106) through a pipeline, the outlet of the solenoid valve (106) is connected to the inlet of an expansion valve (107) through a pipeline, the outlet of the expansion valve (107) is connected to the inlet of an evaporator (108) through a pipeline, the outlet of the evaporator (108) is connected to the inlet of a gas-liquid separator (109) through a pipeline, and the outlet of the gas-liquid separator (109) is connected to the compressor (101) through a pipeline. The outlet of the liquid storage device (103) is also connected to the inlet of the second solenoid valve (110) through a pipeline, and the second solenoid valve (110) and the first solenoid valve (106) are interlocked, and the outlet of the second solenoid valve (110) is connected to the inlet of the second expansion valve (111) through a pipeline; the plate heat exchanger (112) has two groups of flow channels, the outlet of the second expansion valve (111) is connected to the inlet of the first group of flow channels of the plate heat exchanger (112) through a pipeline, and the outlet of the first group of flow channels of the plate heat exchanger (112) is connected to the inlet of the gas-liquid separator (109) through a pipeline; The cold storage system comprises a cold storage box (201) and a water pump (204); the outlet of the cold storage box (201) is connected to the inlet of the second group of flow channels of the plate heat exchanger (112) via a pipeline; the outlet of the second group of flow channels of the plate heat exchanger (112) is connected to the inlet of the water pump (204) via a pipeline; and the outlet of the water pump (204) is connected to the return port of the cold storage box (201) via a pipeline.
2. The air-cooled cold storage compound refrigeration device according to claim 1, characterized in that: In the refrigeration system, solenoid valve 1 (106) is a normally closed solenoid valve, and solenoid valve 2 (110) is a normally open solenoid valve.
3. The air-cooled cold storage compound refrigeration device according to claim 1, characterized in that: In the refrigeration system, a PTC electric heater (3) is installed on the air inlet side of the evaporator (108), and an external controller is electrically connected to the PTC electric heater (3).
4. The air-cooled cold storage compound refrigeration device according to claim 1, characterized in that: In the refrigeration system, a pressure sensor (116) is installed on the inlet pipeline of the liquid storage device (103) via a second needle valve (115), and a pressure protector (114) is installed on the inlet pipeline of the gas-liquid separator. The pressure sensor (116) and the pressure protector (114) are respectively electrically connected to an external controller.
5. The air-cooled cold storage compound refrigeration device according to claim 1, characterized in that: In the refrigeration system, the air inlet side of the evaporator (108) is provided with a temperature sensor 1 (117), the evaporator (108) is provided with a temperature sensor 2 (118), and the condenser (102) is provided with a temperature sensor 3 (109). The temperature sensor 1 (117), the temperature sensor 2 (118), and the temperature sensor 3 (109) are respectively electrically connected to an external controller.
6. The air-cooled cold storage compound refrigeration device according to claim 1, characterized in that: In the cold storage system, the inlet pipeline of the water pump (204) is connected to a first stop valve (202), and the outlet pipeline of the water pump (204) is connected to a second stop valve (205).
7. The air-cooled cold storage compound refrigeration device according to claim 1, characterized in that: In the cold storage system, the water storage tank (201) is provided with a temperature sensor (209) and a photoelectric liquid level switch, and the temperature sensor (209) and the photoelectric liquid level switch are respectively electrically connected to an external controller.