Multi-stage heating and defrosting cascade machine

Abstract

The utility model relates to the technical field of defrosting machines, in particular to a multi-stage heating and defrosting cascade machine, which comprises a double-pipe heat exchanger sleeved outside a water pipe, an input end of the double-pipe heat exchanger is connected with a liquid storage tank, and an output end of the double-pipe heat exchanger is connected with an ultrahigh-temperature compressor through a high-temperature four-way valve; the economizer is connected with the liquid storage tank and is used for improving the circulating efficiency of the refrigerant; the evaporation heat exchanger is connected with the economizer through a low-temperature four-way valve and used for absorbing heat in air to evaporate a refrigerant into gas; the input end of the low-temperature compressor is connected with the evaporation heat exchanger, and the low-temperature compressor is used for compressing the low-temperature and low-pressure refrigerant gas into high-temperature and high-pressure refrigerant gas; and the ultra-high temperature compressor is connected with the economizer and the double-pipe heat exchanger and used for converting the medium-temperature heat energy in the economizer into an ultra-high temperature heat source and transmitting the ultra-high temperature heat source to the double-pipe heat exchanger, multi-stage heating is achieved, and the defrosting efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to defroster technical field especially relates to a multistage heating defrosting cascade machine. BACKGROUND

[0002] A kind of multistage heating defrosting cascade machine, refers to the equipment that high-efficiency defrosting effect is played in heating process using multistage compression technology. Through multistage compression, refrigerant can evaporate under higher pressure, thereby absorbing more heat. This helps to improve the heating efficiency of the equipment, so that it can operate at lower ambient temperature, at the same time, multistage heating technology reduces unnecessary energy consumption by optimizing the circulation process of refrigerant, compared with single-stage heating system, multistage heating system generally has lower energy consumption and higher energy efficiency ratio.

[0003] Chinese patent publication number: CN208091016U, discloses a kind of automatic defrosting heat pump unit. The unit includes: compressor;Condenser, the medium side of its inlet end is connected with the output end of compressor;Throttling element, is connected with the outlet end of condenser medium side;Evaporator, its inlet end is connected with throttling element, outlet end is connected with the input end of compressor;Check valve, is installed on the connecting pipeline of condenser and throttling element, refrigerant in condenser can flow into throttling element by check valve;At least one set of defrosting coil, its inlet end is connected with the connecting pipeline between check valve and condenser, outlet end is connected with the pipeline between check valve and throttling element;Defrosting coil is used to melt the frost layer on the surface of evaporator, it can be seen that the above technical solution single heating path leads to low defrosting efficiency. UTILITY MODEL CONTENT

[0004] Therefore, the utility model provides a kind of multistage heating defrosting cascade machine to overcome the problem of low defrosting efficiency and high cost caused by the defroster consuming a large amount of electric energy in the prior art.

[0005] To achieve the above object, the utility model provides a kind of multistage heating defrosting cascade machine, comprising:

[0006] Double-pipe heat exchanger, its sleeve is connected outside water pipe, its input end is connected with storage tank, its output end is connected with ultrahigh-temperature compressor by high-temperature four-way valve;

[0007] Economizer, it is connected with the storage tank to improve the circulation efficiency of refrigerant;

[0008] Evaporative heat exchanger, it is connected with the economizer by low-temperature four-way valve to evaporate refrigerant into gas by absorbing heat in air;

[0009] Low-temperature compressor, its input end is connected with the evaporative heat exchanger to compress low-temperature low-pressure refrigerant gas into high-temperature high-pressure refrigerant gas;

[0010] A super-high temperature compressor is connected with the economizer and the double-pipe heat exchanger respectively, and is used to convert the medium-temperature heat energy in the economizer into a super-high temperature heat source and transmit the super-high temperature heat source to the double-pipe heat exchanger.

[0011] Further, the water pipe comprises a water inlet for inputting cold water and a water outlet for outputting hot water.

[0012] Further, the low-temperature compressor is further connected with a low-temperature gas-liquid separator.

[0013] Further, the super-high temperature compressor is further connected with a high-temperature gas-liquid separator.

[0014] Further, the low-temperature four-way valve is connected with the economizer, the low-temperature gas-liquid separator, the evaporation heat exchanger and the condenser respectively.

[0015] Further, the high-temperature four-way valve is connected with the economizer, the high-temperature gas-liquid separator, the double-pipe heat exchanger and the super-high temperature compressor respectively.

[0016] Further, the evaporation heat exchanger is provided with an evaporation fan.

[0017] Further, the evaporation heat exchanger is a finned evaporation heat exchanger.

[0018] Further, the high-temperature gas-liquid separator is further connected with a refrigerant channel used to transport refrigerant medium.

[0019] Further, the refrigerant medium is R245FA refrigerant.

[0020] Compared with the prior art, the beneficial effects of the utility model lie in that the utility model combines the super-high temperature compressor and the double-pipe heat exchanger through the multi-stage heating system, can efficiently convert the medium-temperature heat energy in the economizer into a super-high temperature heat source, and improves the heating efficiency.

[0021] Further, the utility model is provided with the economizer, optimizes the circulating path of the refrigerant, improves the circulating efficiency of the refrigerant, and reduces the energy consumption.

[0022] Further, the settings of the low-temperature gas-liquid separator and the high-temperature gas-liquid separator effectively prevent the liquid knock phenomenon of the compressor and prolong the service life of the compressor.

[0023] Further, the combination of the finned evaporation heat exchanger and the evaporation fan improves the heat exchange efficiency of the evaporator and simultaneously enhances the air side heat exchange capacity of the system.

[0024] Further, the R245FA refrigerant as an environmentally-friendly refrigerant has a low global warming potential, helps to reduce the greenhouse gas emission, and meets the requirements of environmental protection and sustainable development. Attached Figure Description

[0025] Fig. 1 This is a front view of a multi-stage heating and defrosting cascade machine according to an embodiment of the present invention;

[0026] Fig. 2 This is a partial structural diagram of the cryogenic compressor according to an embodiment of the present invention;

[0027] Fig. 3 This is a partial structural diagram of the ultra-high temperature compressor according to an embodiment of the present invention;

[0028] Fig. 4 This is a partial structural diagram of the shell-and-tube heat exchanger according to an embodiment of the present utility model;

[0029] In the diagram: 1. Shell-and-tube heat exchanger; 2. Liquid receiver; 3. Refrigerant passage; 4. Economizer; 5. Evaporator heat exchanger; 6. Low-temperature compressor; 7. Ultra-high temperature compressor; 8. Low-temperature four-way valve; 9. Low-temperature gas-liquid separator; 10. Condenser; 11. High-temperature four-way valve; 12. High-temperature gas-liquid separator; 13. Water inlet; 14. Water outlet; 15. Evaporator fan. Detailed Implementation

[0030] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions in the embodiments of this utility model are clearly and completely described. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0031] It should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0032] In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0033] In the description of the embodiments of the utility model, it needs to be explained that, unless there is definite stipulation and limitation, the terms "mount", "connect", "connection" should be understood in broad sense, for example, it can be fixed connection, also can be detachable connection, or integrally connected, it can be mechanical connection, also can be electrical connection, it can be direct connection, also can be indirect connection through intermediate medium, it can be the intercommunication of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the embodiments of the utility model can be understood according to specific circumstances.

[0034] Please refer to Figs. 1 to 4 It is respectively the front view of the utility model embodiment one multistage heating defrosting cascade machine, the partial structure diagram of the utility model embodiment low temperature compressor, the partial structure diagram of the utility model embodiment ultrahigh temperature compressor, the partial structure diagram of the utility model embodiment double-pipe heat exchanger.

[0035] The utility model embodiment one multistage heating defrosting cascade machine, comprising:

[0036] Double-pipe heat exchanger 1, its sleeve is connected in water pipe outside, its input end is connected with storage tank 2, and its output end is connected with ultrahigh temperature compressor 7 through high temperature four-way valve 11;

[0037] Economizer 4, it is connected with the storage tank 2, to improve the circulating efficiency of refrigerant;

[0038] Evaporative heat exchanger 5, it is connected with the economizer 4 through low temperature four-way valve 8, to evaporate refrigerant into gas by absorbing the heat in air;

[0039] Low temperature compressor 6, its input end is connected with the evaporative heat exchanger 5, to compress low temperature low pressure refrigerant gas into high temperature high pressure refrigerant gas;

[0040] Ultrahigh temperature compressor 7, it is connected with the economizer 4 and the double-pipe heat exchanger 1 respectively, to convert the medium temperature heat energy in economizer 4 into ultrahigh temperature heat source and transmit to double-pipe heat exchanger 1.

[0041] Specifically, the water pipe includes water inlet 13 for inputting cold water and water outlet 14 for outputting hot water.

[0042] Specifically, the low temperature compressor 6 is also connected with low temperature gas-liquid separator 9, so that liquid knock can be prevented, and only pure gaseous refrigerant can enter the low temperature compressor 6, so that the compressor is protected.

[0043] Specifically, the ultrahigh temperature compressor 7 is also connected with high temperature gas-liquid separator 12.

[0044] Specifically, the low-temperature four-way valve 8 is connected with the economizer 4, the low-temperature gas-liquid separator 9, the evaporative heat exchanger 5 and the condenser 10 respectively.

[0045] Specifically, the high-temperature four-way valve 11 is connected with the economizer 4, the high-temperature gas-liquid separator 12, the double-pipe heat exchanger 1 and the ultra-high-temperature compressor 7 respectively.

[0046] Specifically, the evaporative heat exchanger 5 is provided with an evaporative fan 15.

[0047] Specifically, the evaporative heat exchanger 5 is a finned evaporative heat exchanger.

[0048] Specifically, the high-temperature gas-liquid separator 12 is further connected with a refrigerant channel 3 for conveying refrigerant medium.

[0049] Specifically, the refrigerant medium is R245FA refrigerant.

[0050] The working process of the utility model is as follows: the economizer 4 passes the refrigerant in the liquid storage tank 2 into the evaporative heat exchanger 5, the refrigerant is changed into refrigerant gas by absorbing heat from air through the evaporative process, the low-temperature and low-pressure refrigerant gas enters the low-temperature compressor 6 through the low-temperature four-way valve 8 and is compressed into high-temperature and high-pressure refrigerant gas, then enters the economizer 4, the economizer 4 exchanges heat with the high-temperature and high-pressure refrigerant gas, then the ultra-high-temperature compressor 7 further compresses the medium-temperature heat energy in the economizer 4 to convert into an ultra-high-temperature heat source which is transmitted to the double-pipe heat exchanger 1 through the high-temperature four-way valve 11, the double-pipe heat exchanger 1 converts cold water into hot water by exchanging heat between the cold water and the high-temperature heat source, so that the hot water pipeline has the effect of defrosting.

[0051] For those skilled in the art, according to the idea of the utility model embodiment, there will be changes in the specific implementation and application range, and the above description should not be understood as a limitation of the utility model.

Claims

1. A multi-stage heat pump defrosting cascade machine characterized by, The application relates to a high-temperature heat pump system. The application relates to a high-temperature heat pump system. The application relates to a high-temperature heat pump system. The application relates to a high-temperature heat pump system. The application relates to a high-temperature heat pump system. The application relates to a high-temperature heat pump system.

2. The multi-stage heating defrost cascade machine of claim 1, wherein, The application relates to a high-temperature heat pump system.

3. The multi-stage heating defrost cascade machine of claim 1, wherein, The application relates to a high-temperature heat pump system.

4. The multi-stage heating defrost cascade machine of claim 1, wherein, The application relates to a high-temperature heat pump system.

5. The multi-stage heating defrost cascade machine of claim 1, wherein, The application relates to a high-temperature heat pump system.

6. The multi-stage heating defrost cascade machine of claim 1, wherein, The application relates to a high-temperature heat pump system.

7. The multi-stage heating defrost cascade machine of claim 1, wherein, The application relates to a high-temperature heat pump system.

8. The multi-stage heating defrost cascade machine of claim 1, wherein, The application relates to a high-temperature heat pump system.

9. The multi-stage heating defrosting cascade machine of claim 6, wherein, The application relates to a high-temperature heat pump system.

10. The multi-stage heating defrost cascade machine of claim 9, wherein, The application relates to a high-temperature heat pump system. The application relates to a high-temperature heat pump system. The application relates to a high-temperature heat pump system. The application relates to a high-temperature heat pump system. The application relates to a high-temperature heat pump system. The application relates to a high-temperature heat pump system. The application relates to a high-temperature heat pump system. The application relates to a high-temperature heat pump system. The application relates to a high-temperature heat pump system. The application relates to a high-temperature heat pump system. The application relates to a high-temperature heat pump system. The application relates to a high-temperature heat pump system. The application relates to a high-temperature heat pump system. The application relates to a high-temperature heat pump system. The application relates to a high-temperature heat pump system. The application relates to a high-temperature heat pump system. The application relates to a high-temperature heat pump system. The application relates to a high-temperature heat pump system. The application relates to a high-temperature heat pump system. The application relates to a high-temperature heat pump system. The application relates to a high-temperature heat pump system. The application relates to a high-temperature heat pump system. The application relates to a high-temperature heat pump system. The application relates to a high-temperature heat pump system. The application relates to a high-temperature heat pump system. The application relates to a high-temperature heat pump system. The application relates to a high-temperature heat pump system. The application relates to a high-temperature heat pump system. The application relates to a high-temperature heat pump system. The application relates to a high-temperature heat pump system. The application relates to a high-temperature heat pump system. The application relates to a high-temperature heat pump system. The application relates to a high-temperature heat pump system. The application relates to a high-temperature heat pump system. The application relates to a high-temperature heat pump system. The application relates to a high-temperature heat pump system. The application relates to a high-temperature heat pump system. The application relates to a high-temperature heat pump system. The application relates to a high-temperature heat pump system. The application relates to a high-temperature heat pump system. The application relates to a high-temperature heat pump system. The application relates to a high-temperature heat pump system. The application relates to a high-temperature heat pump system. The application relates to a high-temperature heat pump system. The application relates to a high-temperature heat pump system. The application relates to a high-temperature heat pump system. The application relates to a high-temperature heat pump system. The application relates to a high-temperature heat pump system. The application relates to a high-temperature heat pump system. The application relates to a high-temperature heat pump system. The application relates to a high-temperature heat pump system. The application relates to a high-temperature heat pump system. The application relates to a high-temperature heat pump system. The application relates to a high-temperature heat pump system. The application relates to a high-temperature heat pump system. The application relates to a high-temperature heat pump system. The application relates to a high-temperature heat pump system. The application

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