Waste heat recovery type refrigeration appliance

Abstract

The utility model relates to the technical field of refrigeration equipment, and provides a waste heat recovery type refrigeration appliance, which comprises an ORC (organic Rankine cycle) system used for recovering heat generated by an equipment condenser of the refrigeration appliance; the ORC system comprises an ORC evaporator, an expansion machine, an ORC condenser and a working medium pump which are circularly connected in sequence; the ORC evaporator is configured to form a heat exchange relation with the equipment condenser and absorb heat generated by the equipment condenser; the expansion machine is configured to convert heat absorbed by the ORC evaporator into mechanical energy; a containing cavity is formed in the lower side of the back of the box body. An equipment condenser is installed in the containing cavity, and an ORC evaporator, an expansion machine and a working medium pump of an ORC system are further installed in the containing cavity. The ORC evaporator and the equipment condenser are in heat exchange connection through heat exchange fins. Therefore, heat generated by the condenser of the equipment is absorbed through the ORC evaporator of the ORC system, and the heat is converted into mechanical energy through the expansion machine. And the recycling of low-grade waste heat of the refrigeration appliance is realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of refrigeration equipment, and in particular relates to a waste heat recovery refrigeration appliance. Background Art

[0002] The working process of refrigerators, freezers and other refrigeration equipment generates a lot of waste heat. For example, the heat dissipation temperature of the condenser can reach above 50°C. However, as a low-grade heat source, this heat is difficult to recycle and can only be dissipated into the air, which is wasted.

[0003] In recent years, the market for refrigerators and other refrigeration appliances has become saturated, resulting in a huge number of household refrigerators, commercial refrigerators, and industrial refrigeration equipment. In addition, with the popularity of large-volume refrigerators, the amount of heat wasted by condensers each year cannot be ignored. At the same time, there is a lack of solutions for recycling this heat.

[0004] In summary, the prior art obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0005] In view of the above-mentioned defects, the utility model mainly provides a waste heat recovery refrigeration appliance to solve the technical problem of recycling the heat consumed by the condenser.

[0006] In order to solve the above problems, the utility model provides a waste heat recovery refrigeration appliance, including an ORC system, which is used to recover the heat generated by the condenser of the refrigeration appliance; the ORC system includes an ORC evaporator, an expander, an ORC condenser and a working fluid pump which are cyclically connected in sequence;

[0007] The ORC evaporator is configured to: form a heat exchange relationship with the device condenser to absorb heat generated by the device condenser;

[0008] The expander is configured to convert heat absorbed by the ORC evaporator into mechanical energy.

[0009] According to the waste heat recovery refrigeration appliance of the utility model, the refrigeration appliance has a box body, and a accommodating cavity is opened on the lower back side of the box body; the equipment condenser is installed in the accommodating cavity, and the ORC evaporator, expander and working fluid pump of the ORC system are also installed; the ORC evaporator and the equipment condenser are connected to each other for heat exchange through heat exchange fins.

[0010] According to the waste heat recovery refrigeration appliance of the utility model, the ORC evaporator and the equipment condenser are both tubular, and both include a plurality of straight segments, each of which is sequentially connected by arc segments; each of the straight segments of the ORC evaporator and the equipment condenser is connected with a plurality of heat exchange fins arranged in parallel.

[0011] According to the waste heat recovery refrigeration appliance of the utility model, a compressor is further arranged in the accommodating chamber, and the heat exchange fins are fixed on the outer shell of the compressor.

[0012] According to the waste heat recovery refrigeration appliance of the utility model, the ORC condenser is arranged in a heat accumulator, and a liquid heat storage medium circulates in the heat accumulator.

[0013] According to the waste heat recovery refrigeration appliance of the utility model, the heat accumulator is provided on the top of the box body, and the heat storage medium is water or kerosene.

[0014] According to the waste heat recovery refrigeration appliance of the utility model, the expansion machine is connected to the fan.

[0015] According to the waste heat recovery refrigeration appliance of the utility model, the expander is connected to the generator, the generator is connected to the battery; the battery is electrically connected to the fan.

[0016] According to the waste heat recovery refrigeration appliance of the utility model, a storage compartment is provided in the box body, and the fan is provided on the inner wall of the storage compartment.

[0017] According to the waste heat recovery refrigeration appliance of the utility model, the fan is a centrifugal fan.

[0018] In summary, the utility model absorbs the heat generated by the condenser of the equipment through the ORC evaporator of the ORC system, and converts the heat into mechanical energy for reuse through the expander, thereby realizing the recovery and reuse of low-grade waste heat of refrigeration appliances. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of an embodiment of an ORC system of the utility model;

[0020] Figure 2 It is a structural schematic diagram of an embodiment of an ORC system of the utility model;

[0021] Figure 3 It is a structural schematic diagram of an embodiment of a refrigeration appliance of the utility model;

[0022] Figure 4 yes Figure 3 The structural diagram of the middle A direction;

[0023] Figure 5 yes Figure 4 Schematic diagram of the structure of the middle B area;

[0024] Figure 6 yes Figure 5 Schematic diagram of the structure of the local area;

[0025] Figure 7 yes Figure 6 Schematic diagram of the structure of the ORC evaporator and the equipment condenser;

[0026] In the figure: 1-ORC system, 11-ORC evaporator, 12-expander, 13-ORC condenser, 14-working fluid pump, 15-heat exchange fins; 2-box, 21-equipment condenser, 22-accommodation chamber; 3-fan, 4-heat storage device, 5-generator, 51-battery. DETAILED DESCRIPTION

[0027] See also Figure 1 The utility model provides a waste heat recovery refrigeration appliance, including an ORC system 1, i.e., an organic Rankine cycle system; used to recover the heat generated by the condenser 21 of the refrigeration appliance; the ORC system 1 includes an ORC evaporator 11, an expander 12, an ORC condenser 13 and a working fluid pump 14 which are cyclically connected in sequence;

[0028] The ORC evaporator 11 is configured to: form a heat exchange relationship with the device condenser 21 and absorb the heat generated by the device condenser 21;

[0029] The expander 12 is configured to: convert the heat absorbed by the ORC evaporator 11 into mechanical energy;

[0030] An organic working fluid is introduced into the ORC system 1 and circulated by a working fluid pump 14 to recover and utilize the waste heat generated by the refrigeration appliance.

[0031] More preferably, the ORC condenser 13 of the utility model is arranged in the heat accumulator 4, and a liquid heat storage medium circulates in the heat accumulator 4; the heat dissipated by the liquefied organic working fluid in the ORC condenser 13 is absorbed and stored by the heat storage medium.

[0032] Optionally, the heat storage medium of the present invention is water. The water is heated by the ORC condenser 13 and stored in the heat storage device 4, and released when used, thereby reducing the duration and frequency of electric heating and reducing energy consumption.

[0033] Optionally, the heat storage medium of the utility model can also be kerosene. The kerosene is heated by the ORC condenser 13 to increase its temperature, and then the heat of the kerosene is dissipated into the indoor air through the shell of the heat storage device 4, thereby increasing the room temperature and reducing the energy consumption of indoor heating.

[0034] The utility model absorbs the heat generated by the equipment condenser 21 through the ORC evaporator 11 of the ORC system 1, and converts the heat into mechanical energy for reuse through the expander 12, thereby realizing the recovery and reuse of low-grade heat of refrigeration appliances.

[0035] As an embodiment, the expander 12 of the utility model is connected to the fan 3; the mechanical energy generated by the expander 12 drives the fan 3 to rotate. The fan 3 of the utility model can be a refrigeration fan of a refrigeration appliance, which recovers the waste heat of the refrigeration appliance and then drives the refrigeration fan, thereby reducing the power-on driving time and reducing the overall energy consumption.

[0036] Optionally, the fan 3 of the utility model can also be a circulating fan in the storage room of the refrigeration appliance, and the temperature in the room can be made uniform through its rotation, thereby improving the storage effect.

[0037] See also Figure 2 As an embodiment, the expander 12 of the utility model is connected to the generator 5, and the generator 5 is connected to the battery 51; the mechanical energy generated by the expander 12 is converted into electrical energy for storage and reuse.

[0038] Optionally, the battery 51 can be connected to the aforementioned fan 3; by optimizing the control strategy, when the fan 3 needs to be turned on, the battery 51 is used first to drive it, thereby reducing energy consumption. Optionally, the battery 51 can also be connected to other electrical devices of the refrigeration appliance, such as the lighting in the storage room or the indicator light of the refrigeration appliance.

[0039] Recovering the waste heat from refrigeration appliances and reusing them in refrigeration appliances can reduce energy consumption, maintain the functions of refrigeration appliances, and improve the cost-effectiveness of the products.

[0040] See also Figure 3 and Figure 4 As an embodiment, the refrigeration appliance of the utility model has a box body 2, and a receiving cavity 22 is opened on the lower back side of the box body 2; Figure 5 The accommodating chamber 22 is provided with a device condenser 21, and is also provided with an ORC evaporator 11, an expander 12 and a working fluid pump 14 of the ORC system 1; the ORC evaporator 11 and the device condenser 21 are connected to each other for heat exchange via a heat exchange fin 15;

[0041] The equipment condenser 21 exchanges the generated heat to the heat exchange fins 15, and the heat exchange fins 15 then exchange the heat to the ORC evaporator 11;

[0042] See also Figure 7 The ORC evaporator 11 and the equipment condenser 21 are both tubular, and both include a plurality of straight segments, each of which is sequentially connected by arc segments to form a coiled structure.

[0043] Combination Figure 6 Each straight line segment of the ORC evaporator 11 and the equipment condenser 21 is connected with a plurality of heat exchange fins 15 arranged in parallel; heat is transferred between adjacent straight line segments of the ORC evaporator 11 and the equipment condenser 21 through the heat exchange fins 15 .

[0044] Preferably, a compressor is also arranged in the accommodation chamber 22, and the heat exchange fins 15 are fixed on the shell of the compressor; the ORC evaporator 11 can absorb the heat generated by the compressor while absorbing the heat generated by the equipment condenser 21, thereby increasing the waste heat recovery amount and recovery efficiency, so that the heat generated by the refrigeration appliance can be fully recovered and utilized.

[0045] As an implementation, the heat accumulator 4 is provided on the top of the box 2; the space above the box 2 is fully utilized to install the heat accumulator 4. Optionally, the heat accumulator 4 can also be fixed on the wall of the room where the refrigeration appliance is placed. Those skilled in the art can make adaptive responses according to the actual situation of the user.

[0046] Furthermore, a storage compartment is provided in the box body 2, and the fan 3 is provided on the inner wall of the storage compartment; the temperature in the storage compartment is made uniform by the fan 3. Preferably, the fan 3 of the utility model is a centrifugal fan, and the air flow blown out flows parallel to the inner wall and forms a wind film along the inner wall to reduce the loss of cooling capacity.

[0047] As an embodiment, the refrigeration appliance of the present invention may be a refrigerator or a freezer.

[0048] Those skilled in the art can select known expanders, working fluid pumps, generators, batteries and other devices of suitable sizes according to the specifications of the refrigeration appliance so that they can be adapted to the refrigeration appliance.

[0049] In summary, the utility model provides a waste heat recovery refrigeration appliance, which absorbs the heat generated by the condenser of the equipment through the ORC evaporator of the ORC system, and converts the heat into mechanical energy for reuse through the expander, thereby realizing the recovery and reuse of low-grade waste heat of the refrigeration appliance.

[0050] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, technicians familiar with the field can make various corresponding changes and deformations based on the present invention, but these corresponding changes and deformations should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. A waste heat recovery refrigeration appliance, characterized in that: An ORC system is included for recovering heat generated by a condenser of the refrigeration appliance; the ORC system includes an ORC evaporator, an expander, an ORC condenser and a working fluid pump which are cyclically connected in sequence; The ORC evaporator is configured to: form a heat exchange relationship with the device condenser to absorb heat generated by the device condenser; The expander is configured to convert heat absorbed by the ORC evaporator into mechanical energy.

2. The waste heat recovery refrigeration appliance according to claim 1, characterized in that: The refrigeration appliance has a box body, and a accommodating cavity is opened on the lower back side of the box body; the equipment condenser is installed in the accommodating cavity, and the ORC evaporator, expander and working fluid pump of the ORC system are also installed; the ORC evaporator and the equipment condenser are connected to each other for heat exchange through heat exchange fins.

3. The waste heat recovery refrigeration appliance according to claim 2, characterized in that: The ORC evaporator and the equipment condenser are both tubular, and both include a plurality of straight segments, each of which is sequentially connected by arc segments; each of the straight segments of the ORC evaporator and the equipment condenser is connected with a plurality of heat exchange fins arranged in parallel.

4. The waste heat recovery refrigeration appliance according to claim 2, characterized in that: A compressor is also arranged in the accommodating cavity, and the heat exchange fins are fixed on the outer shell of the compressor.

5. The waste heat recovery refrigeration appliance according to claim 2, characterized in that: The ORC condenser is arranged in a heat accumulator, and a liquid heat storage medium circulates in the heat accumulator.

6. The waste heat recovery refrigeration appliance according to claim 5, characterized in that: The heat accumulator is arranged on the top of the box body, and the heat storage medium is water or kerosene.

7. The waste heat recovery refrigeration appliance according to claim 2, characterized in that: The expander is connected to the fan.

8. The waste heat recovery refrigeration appliance according to claim 7, characterized in that: The expander is connected to a generator, the generator is connected to a battery; and the battery is electrically connected to the fan.

9. The waste heat recovery refrigeration appliance according to claim 7 or 8, characterized in that: A storage chamber is provided in the box body, and the fan is provided on the inner wall of the storage chamber.

10. The waste heat recovery refrigeration appliance according to claim 9, characterized in that: The fan is a centrifugal fan.

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