Refrigerating system

Abstract

A refrigerating system is characterized in that a heater is used for heating refrigerant gas in a refrigerant gas heat preservation box, a gas outlet of the refrigerant gas heat preservation box is communicated with a first inlet of an ejector, an outlet of the ejector is communicated with an inlet of a gas-liquid separator through a condenser, and an outlet of the gas-liquid separator is divided into two paths, wherein one path is communicated with a second inlet of the ejector through an electronic expansion valve and an evaporator in sequence, and the other path is communicated with a backflow port of the refrigerant gas heat preservation box through a one-way valve and a circulating pump. In the working process, high-temperature and high-pressure refrigerant gas serves as primary fluid to enter a nozzle opening of the ejector, low-temperature and low-pressure refrigerant gas from the evaporator side is sucked through ejection, the two streams of fluid are mixed and then enter a condenser to be cooled to refrigerant supercooled liquid with the middle pressure, and one part of the fluid enters the condenser to be cooled to the middle pressure through the throttling and pressure reducing effect of the electronic expansion valve. And after absorbing heat at the evaporator, the low-temperature low-pressure refrigerant enters the circulation as a secondary fluid, and the other part of the low-temperature low-pressure refrigerant is sucked and pressurized by the circulating pump and enters the circulation as a primary fluid.

Description

TECHNICAL FIELD

[0001] The utility model relates to a refrigeration system. BACKGROUND

[0002] A large amount of heat is generated during cooking, which causes the temperature inside the kitchen to be too high, seriously affecting human comfort, especially in summer, the phenomenon of stuffy kitchen is more prominent, therefore, people have invented various kitchen air conditioners to cool the kitchen air in summer to improve cooking comfort. If a large amount of waste heat generated during cooking is not reasonably recycled, it will cause a certain waste of energy. At present, the existing kitchen air conditioners on the market are still the common vapor compression type refrigeration, the difference from ordinary household air conditioners is that they have been treated to resist oil stains, but they do not have the function of recycling kitchen waste heat, and directly using the vapor compression type refrigeration method for kitchen refrigeration has a compressor as a moving part, the system is complex, additional input power is required, and it is not energy-saving. Most of the waste heat recovery devices disclosed in the prior art are heat from stoves and flue gas and heat from air conditioner condensers, which are absorbed through a water loop and used as a heat source for domestic hot water. For example, the Chinese invention patent with the patent number 201210063400.8 (the authorized announcement number is CN 102840717A) discloses a heat energy recovery device, which is composed of an exhaust air heat absorber, a drain water heat absorber, a circulating water pump, a water storage device, a room air conditioner, a refrigeration system and a power distribution control system. The exhaust air heat absorber is installed in the kitchen exhaust hood, smoke exhaust hood and other equipment for removing high temperature waste gas, and exchanges heat with the oil smoke and other high temperature waste gas. The drain water heat absorber is installed at the position where the high temperature waste water flows through, and exchanges heat with the high temperature waste water. The exhaust air heat absorber and the drain water heat absorber contain water or refrigerant, which is collected in the water storage device through the circulating water pump or the refrigeration system, to provide domestic hot water and air conditioning hot water for users. It can be seen that the heat energy recovery device does not directly utilize waste heat for refrigeration. UTILITARIAN CONTENT

[0003] The technical problem to be solved by the utility model is to provide a refrigeration system that realizes refrigeration by driving the refrigerant flow on the evaporator side through the entraining effect of the ejector in view of the above prior art status.

[0004] The utility model discloses a technical scheme that solves the above technical problem is as follows: a refrigeration system, characterized in that: including refrigerant gas heat preservation box, heater, ejector, condenser, gas-liquid separator, electronic expansion valve, evaporator, check valve and circulating pump, the heater is used to heat the refrigerant gas in refrigerant gas heat preservation box, the air outlet of refrigerant gas heat preservation box is linked with the first inlet of ejector, and the outlet of ejector is linked with the inlet of gas-liquid separator through condenser, and the outlet of gas-liquid separator is divided into two ways, one of which is communicated with the second inlet of ejector in turn through electronic expansion valve and evaporator, and the other is communicated with the backflow port of refrigerant gas heat preservation box in turn through check valve and circulating pump.

[0005] In order to heat the refrigerant gas in the refrigerant gas heat preservation box, the heater comprises a first heater for heating the low-temperature high-pressure refrigerant gas to high-temperature high-pressure refrigerant gas, and the first heater is communicated with the refrigerant gas heat preservation box through a first pipeline, and a first valve is installed on the first pipeline.

[0006] Further preferably, the heater further comprises a second heater for heating the low-temperature high-pressure refrigerant gas to high-temperature high-pressure refrigerant gas, and the second heater is communicated with the refrigerant gas heat preservation box through a second pipeline, and a second valve is installed on the second pipeline.

[0007] The refrigeration system can be applied in multiple different occasions, and preferably, the refrigeration system is applied in a kitchen, a gas stove is installed in the kitchen, the gas stove has a first burner and a second burner, the first heater is heated in the first burner ignition state, and the second heater is heated in the second burner ignition state. By such arrangement, on the one hand, waste heat of the gas stove can be utilized to realize heat-driven refrigeration, and the heat source of the waste heat recovery refrigeration system is stable, and on the other hand, the refrigeration system applied in the kitchen environment can solve the problem of hot kitchen in summer, and greatly improve the user's cooking experience.

[0008] In order to enable the heat of the gas stove to be transmitted to the heater in time, preferably, the first heater and the second heater are both coil heaters installed near the gas stove.

[0009] In order to realize auxiliary heating and ensure that the temperature of the refrigerant gas heat preservation box is constant, the heater further comprises a third heater, a first end of the third heater is communicated with the refrigerant gas heat preservation box through a third pipeline, a third valve is installed on the third pipeline, and a second end of the third heater is communicated with the first inlet of the ejector.

[0010] The third heater can be of multiple types, and preferably, the third heater is a PTC heater.

[0011] Further preferably, the third valve opens when the vapor temperature inside the refrigerant gas insulation box reaches 100°C. This configuration ensures that when the cooling function is required, the third valve opens when the vapor temperature inside the refrigerant gas insulation box reaches 100°C, guaranteeing the continuous and normal operation of the injection system.

[0012] The first valve, the second valve, and the third valve can take many forms. For ease of control, preferably, the first valve, the second valve, and the third valve are all solenoid valves.

[0013] As a preferred embodiment of any of the above solutions, a drying filter is installed on the pipeline between the check valve and the circulating pump.

[0014] Compared with the prior art, the advantages of this utility model are as follows: When the refrigeration system is working, the refrigerant gas in the refrigerant gas insulation box is heated to a high temperature and high pressure. The refrigerant gas enters the nozzle of the ejector as a primary fluid. Through the ejector action, the low temperature and low pressure refrigerant gas from the evaporator side as a secondary fluid is drawn in. The two fluids mix into a mixed fluid and enter the condenser to cool down to an intermediate pressure refrigerant subcooled liquid. Part of it is converted into a low temperature and low pressure refrigerant through the throttling and pressure reduction action of the electronic expansion valve. After absorbing heat at the evaporator, it enters the circulation as a secondary fluid. The other part is sucked in and pressurized by the circulation pump and enters the circulation as a primary fluid. It can be seen that this refrigeration system uses heat-driven refrigeration technology and uses the ejector action to drive the flow of refrigerant on the evaporator side to achieve refrigeration. The refrigeration method is relatively novel. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the refrigeration system according to an embodiment of the present invention. Detailed Implementation

[0016] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0017] like Figure 1 As shown, the refrigeration system of this embodiment includes components such as a refrigerant gas insulation box 1, a heater, an ejector 3, a condenser 4, a gas-liquid separator 5, an electronic expansion valve 6, an evaporator 7, a one-way valve 8, a circulating pump 10, and a dryer filter 11. The heater heats the refrigerant gas inside the refrigerant gas insulation box 1. The outlet of the refrigerant gas insulation box 1 is connected to the first inlet of the ejector 3. The outlet of the ejector 3 is connected to the inlet of the gas-liquid separator 5 via the condenser 4. The outlet of the gas-liquid separator 5 is divided into two paths: one path is connected to the second inlet of the ejector 3 via the electronic expansion valve 6 and the evaporator 7, and the other path is connected to the return port of the refrigerant gas insulation box 1 via the one-way valve 8 and the circulating pump 10. The dryer filter 11 is installed on the pipeline between the one-way valve 8 and the circulating pump 10.

[0018] The heater is used to heat the low-temperature, high-pressure refrigerant gas in the hot refrigerant gas insulation box 1 to a high-temperature, high-pressure refrigerant gas. For refrigeration systems, the concepts of low temperature, high temperature, and high pressure in low-temperature, high-pressure refrigerant and high-temperature, high-pressure refrigerant are common knowledge in the field, and will be explained in detail in this step.

[0019] The heater specifically includes a first heater 21, a second heater 22, and a third heater 23. The first heater 21 is connected to the refrigerant gas insulation box 1 via a first pipe 101, and a first valve 91 is installed on the first pipe 101. The second heater 22 is connected to the refrigerant gas insulation box 1 via a second pipe 102, and a second valve 92 is installed on the second pipe 102. The first end of the third heater 23 is connected to the refrigerant gas insulation box 1 via a third pipe 103, and a third valve 93 is installed on the third pipe 103. The second end of the third heater 23 is connected to the first inlet of the ejector 3.

[0020] To utilize waste heat from a gas stove for heat-driven refrigeration, the refrigeration system in this embodiment is applied to a kitchen. A gas stove with a first burner and a second burner is installed in the kitchen. When the first burner is ignited, the first heater 21 is heated, and when the second burner is ignited, the second heater 22 is heated. Both the first heater 21 and the second heater 22 are coil-type heaters installed near the gas stove to ensure a stable heat source for the waste heat recovery refrigeration system.

[0021] In this embodiment, the third heater 23 is a PTC heater. The PTC heater provides auxiliary heating. When the cooling function is required, the third valve 93 opens when the steam temperature inside the refrigerant gas insulation box reaches 100°C, ensuring the continuous normal operation of the injection system.

[0022] In this embodiment, the first valve 91, the second valve 92, and the third valve 93 are all solenoid valves.

[0023] The working process of the refrigeration system is as follows: The first heater 21 and the second heater 22 near the gas stove heat the low-temperature and high-pressure refrigerant gas to a high-temperature and high-pressure refrigerant gas. As a primary fluid, it enters the nozzle of the ejector 3. Through the ejector action, it draws in the low-temperature and low-pressure refrigerant gas from the evaporator 7 side as a secondary fluid. The two fluids mix into a mixed fluid and enter the condenser 4 to cool down to an intermediate pressure refrigerant subcooled liquid. Part of it is converted into a low-temperature and low-pressure refrigerant through the throttling and pressure reduction action of the electronic expansion valve 6. After absorbing heat at the evaporator 7, it enters the circulation as a secondary fluid. The other part is sucked in and pressurized by the circulation pump 10 and enters the circulation as a primary fluid.

[0024] When the first burner of the gas stove is successfully ignited, the first heater 21 is heated, the first valve 91 is opened, and the refrigerant gas insulation box 1 is heated. After the first burner is turned off, the first valve 91 is closed. The second burner is operated in the same way. If neither the first nor the second burner is turned on, the third heater 23, i.e., the PTC heater, is responsible for heating. When the cooling function is needed, the third valve 93 is opened when the temperature of the refrigerant gas insulation box 1 reaches 100°C to ensure the continuous normal operation of the injection system.

Claims

1. A refrigeration system, characterized in that: The refrigerant gas insulation box (1), heater, ejector (3), condenser (4), gas-liquid separator (5), electronic expansion valve (6), evaporator (7), check valve (8) and circulation pump (10) are included. The heater is used to heat the refrigerant gas in the refrigerant gas insulation box (1). The outlet of the refrigerant gas insulation box (1) is connected to the first inlet of the ejector (3). The outlet of the ejector (3) is connected to the inlet of the gas-liquid separator (5) through the condenser (4). The outlet of the gas-liquid separator (5) is divided into two paths. One path is connected to the second inlet of the ejector (3) through the electronic expansion valve (6) and the evaporator (7) in sequence. The other path is connected to the return port of the refrigerant gas insulation box (1) through the check valve (8) and the circulation pump (10) in sequence.

2. The refrigeration system according to claim 1, characterized in that: The heater includes a first heater (21) for heating the low-temperature, high-pressure refrigerant gas to a high-temperature, high-pressure refrigerant gas. The first heater (21) is connected to the refrigerant gas insulation box (1) through a first pipeline (101), and a first valve (91) is installed on the first pipeline (101).

3. The refrigeration system according to claim 2, characterized in that: The heater also includes a second heater (22) for heating the low-temperature, high-pressure refrigerant gas to a high-temperature, high-pressure refrigerant gas. The second heater (22) is connected to the refrigerant gas insulation box (1) through a second pipeline (102), and a second valve (92) is installed on the second pipeline (102).

4. The refrigeration system according to claim 3, characterized in that: The refrigeration system is applied in a kitchen, where a gas stove is installed. The gas stove has a first burner and a second burner. When the first burner is ignited, the first heater (21) is heated, and when the second burner is ignited, the second heater (22) is heated.

5. The refrigeration system according to claim 4, characterized in that: The first heater (21) and the second heater (22) are both coil heaters installed near the gas stove.

6. The refrigeration system according to claim 2, characterized in that; The heater also includes a third heater (23), the first end of which is connected to the refrigerant gas insulation box (1) through a third pipeline (103), a third valve (93) is installed on the third pipeline (103), and the second end of the third heater (23) is connected to the first inlet of the ejector (3).

7. The refrigeration system according to claim 6, characterized in that: The third heater (23) is a PTC heater.

8. The refrigeration system according to claim 6, characterized in that: When the steam temperature in the refrigerant gas insulation box (1) reaches 100°C, the third valve (93) is opened.

9. The refrigeration system according to claim 6, characterized in that: The first valve (91), the second valve (92) and the third valve (93) are all solenoid valves.

10. The refrigeration system according to any one of claims 1 to 9, characterized in that: A drying filter (11) is installed on the pipeline between the one-way valve (8) and the circulating pump (10).

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