Efficient air conditioning device used in winter

Abstract

An efficient air conditioning device used in a specific area in winter comprises a conventional air conditioning system and an ice slurry energy storage heat exchange system, the conventional air conditioning system comprises an indoor evaporator / condenser, an outdoor condenser / evaporator and a compressor, and the ice slurry energy storage heat exchange system comprises a simplex evaporator, a water tank and an air heater; the simplex evaporator is provided with a refrigerant channel and a water channel, the refrigerant channel is connected to a refrigerant pipeline in parallel, the refrigerant channel at the upper end of the simplex evaporator is connected to a second electromagnetic reversing valve, and the water tank is connected with the upper end of the water channel of the simplex evaporator through a first water return pipeline. The water tank is connected with a water channel of the simplex evaporator and connected with the air heater. According to the scheme, when the environmental condition is close to frosting, the outdoor condenser / evaporator of the air conditioner can be switched into the simplex evaporator through the second electromagnetic reversing valve, in the simplex evaporator, the lowest water temperature is not lower than-5 DEG C, freezing is avoided, and therefore the air conditioner always operates in the efficient heating state, and electric heating does not need to be started.

Description

Technical Field

[0001] The utility model relates to the technical field of air-conditioning equipment for refrigeration and heating, and in particular to a high-efficiency air-conditioning device used in winter. Background Art

[0002] There are two modes for air conditioning heating: heating mode and cooling mode. In heating mode, there are heat pump mode and electric heating mode. In winter, the heating mode is generally used. When the heating capacity is the same, the energy consumption of the heat pump mode is ⅓ to ¼ of that of the electric heating mode. It is an extremely energy-saving mode and is recommended to be used first.

[0003] The winter in the Yangtze River area often has such weather phenomenon: the temperature is about 10℃ during the day and -3~-5℃ at night. In this case, the air conditioner is basically in electric heating mode at night. The main reason is that when the outdoor unit of the air conditioner is running in a low temperature and humid air environment, the fin gap is prone to frost. Even if the air conditioner has a defrost function, the heating efficiency of the air conditioner decreases in the period from the beginning of frost to the end of defrost.

[0004] In view of this, how to solve the problems of increased air conditioning energy consumption and decreased heating efficiency caused by easy frost in the radiator fin gap when using air conditioning in winter in specific areas such as the Yangtze River area has become the subject to be studied and solved by the present utility model. Utility Model Content

[0005] The purpose of the utility model is to provide a high-efficiency air-conditioning device for use in winter, so as to solve the problems of increased air-conditioning energy consumption and decreased heating efficiency caused by easy frost in the gaps between radiator fins when using air-conditioning in winter in specific areas such as the Yangtze River area.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a high-efficiency air-conditioning device used in a specific area in winter, the air-conditioning device comprising an air-conditioning system and an ice slurry energy storage and heat exchange system;

[0007] The air conditioning system includes an indoor evaporator / condenser, an outdoor condenser / evaporator, and a compressor;

[0008] The lower end of the indoor evaporator / condenser is connected to the throttle valve through a refrigerant pipeline, and the lower end of the outdoor condenser / evaporator is connected to the throttle valve through a refrigerant pipeline via a three-way pipe fitting;

[0009] The upper end of the indoor evaporator / condenser is connected to the interface P1 of the electromagnetic reversing valve 1 through a pipeline, the upper end of the outdoor condenser / evaporator is connected to the interface A2 of the electromagnetic reversing valve 2 through a pipeline, one pipeline of the compressor is connected to the interface P1 of the electromagnetic reversing valve 1, and another pipeline is connected to the interface T1 of the electromagnetic reversing valve 1; the interface B1 of the electromagnetic reversing valve 1 is connected to the two interfaces P2 and T2 of the electromagnetic reversing valve 2;

[0010] The ice slurry energy storage and heat exchange system comprises a simplex evaporator, a water tank, and an air heater;

[0011] The simplex evaporator is provided with a refrigerant channel and a water channel. The refrigerant channel at the lower end of the simplex evaporator is connected to the refrigerant pipeline and the throttle valve at the lower end of the outdoor condenser / evaporator through a three-way pipe fitting, and the refrigerant channel at the upper end of the simplex evaporator is connected to the interface B2 of the electromagnetic reversing valve 2;

[0012] The water tank is connected to the water channel at the upper end of the simplex evaporator through a return water pipe 1; the water tank is connected to the water channel at the lower end of the simplex evaporator through a water outlet pipe 1, and a valve 1 and a pump 1 are arranged in series on the water outlet pipe 1;

[0013] One end of the water tank is connected to the air heater through a second return pipe, and the other end of the water tank is connected to the air heater through a second outlet pipe. A second valve and a second pump are arranged in series on the second outlet pipe.

[0014] The working principle of the technical solution of the utility model is:

[0015] In heating mode: when the outdoor air temperature is low, the outdoor condenser / evaporator works in the evaporator state, and the temperature of its pipes and fins is lower than 0℃, open the electromagnetic reversing valve 2 to switch the air conditioner outdoor condenser / evaporator to a simplex evaporator. Valve 1 and pump 1 are turned on. In the simplex evaporator, the refrigerant absorbs the heat of the water, turning the water from normal water into supercooled water. When the temperature is 0~-3℃, water can exist stably in a supercooled state without interference, and is converted into ice slurry after being sprayed into the water tank. The latent heat of phase change of water solidification is about 336KJ / Kg, which is much larger than the heat capacity of water rising and falling by 10℃ (specific heat 4.2KJ / KG·℃).

[0016] In ice melting mode: when the daytime temperature rises above 5°C, close the electromagnetic reversing valve 2, switch the air conditioner simplex evaporator to the outdoor condenser / evaporator, and at the same time close valve 1 and pump 1, open valve 2 and pump 2, and switch to ice melting mode. Heat the ice-water mixture in the water tank through the air heater to melt the ice slurry into water. When the ice slurry is completely melted, turn off the air heater, close valve 2 and pump 2, and the ice melting mode ends.

[0017] The relevant contents of this utility model are explained as follows:

[0018] 1. In the above technical solution of the utility model, by adding an ice slurry energy storage and heat exchange system on the basis of a conventional air conditioning system, when the environmental conditions are close to frosting, the air conditioning outdoor condenser / evaporator is switched to a simplex evaporator through the electromagnetic reversing valve 2. In the simplex evaporator, the water temperature is not lower than -5°C and will not freeze, so that the air conditioner is always kept in an efficient heating state without turning on the electric heating; and when the ambient temperature rises, the mode is switched, and the ice-water mixture in the water tank is heated by the air heater to melt the ice slurry into water, waiting for the next use of the heating mode. The phase change latent heat of water solidification is about 336KJ / Kg, which is much larger than the heat capacity of water rising and falling by 10°C (specific heat 4.2KJ / KG·℃). The utility model mainly stores energy through phase change, which has a large energy storage capacity compared to the simple water temperature rise and fall, and the required water tank volume is smaller.

[0019] 2. In the above technical solution, the air conditioning device is configured to have a cooling mode, a heating mode, and an ice melting mode; wherein:

[0020] In the heating mode, the electromagnetic reversing valve 2 is opened, the valve 1 and the pump 1 are turned on, the refrigerant channel of the simplex evaporator is connected with the outdoor condenser / evaporator to form a circulating refrigerant loop, and the water channel of the simplex evaporator is connected with the water tank, the water outlet pipe 1 and the water return pipe 1 to form a circulating water loop. The refrigerant absorbs the heat of the water, so that the water in the circulating water loop changes from normal water to supercooled water, and then is converted into ice slurry in the water tank;

[0021] In the ice melting mode, the electromagnetic reversing valve 2 is closed, the valve 1 and the pump 1 are closed, the valve 2 and the pump 2 are opened, and the air heater is connected with the water tank, the water outlet pipe 2 and the water return pipe 2 to form a circulating heating loop to melt the ice slurry in the water tank into water.

[0022] 3. In the above technical solution, the return water pipe is connected to the water outlet of the water tank located at the top of the water tank, and the supercooled water is sprayed into the water tank from the water outlet at the top of the water tank and converted into ice slurry, which effectively promotes the phase change process of supercooled water into ice slurry.

[0023] 4. In the above technical solution, the return pipe 2 is connected to the water outlet of the water tank located at the top of the water tank. The supercooled water is heated by the air heater to become normal water. The high-temperature normal water is sprayed into the water tank from the water outlet on the top of the water tank to heat the ice-water mixture in the water tank, effectively promoting the phase change process of melting the ice slurry into water.

[0024] 5. In the above technical solution, the electromagnetic reversing valve 1 and the electromagnetic reversing valve 2 are four-way electromagnetic reversing valves.

[0025] 6. In the above technical solution, the water tank is a container for containing ice slurry, water or a mixture of ice slurry and water. Since the implementation of this solution has a large energy storage capacity, a smaller water tank can meet the heat exchange requirements.

[0026] Due to the application of the above scheme, the utility model has the following advantages and effects compared with the prior art:

[0027] 1. It avoids the air conditioner being in electric heating mode, thereby improving the heating efficiency of the air conditioner.

[0028] 2. Channel phase change energy storage makes the water tank smaller in size.

[0029] 3. The medium is water, which is safe and environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Attached Figure 1 This is a schematic structural diagram of a high-efficiency air conditioning device used in a specific area in winter according to an embodiment of the utility model;

[0031] Attached Figure 2 It is a schematic diagram of the flow direction of the refrigerant in the circulating refrigerant circuit and the flow direction of the water in the circulating water circuit in the heating mode of the embodiment of the utility model;

[0032] Attached Figure 3 Schematic diagram of the flow direction of water in the circulating heating loop in the ice melting mode according to an embodiment of the present invention.

[0033] The various parts of the above drawings are shown as follows:

[0034] 100 Air conditioning system

[0035] 200 Ice Slurry Energy Storage and Heat Exchange System

[0036] 1 Indoor evaporator / condenser

[0037] 2 Solenoid reversing valve 1

[0038] 3 Outdoor condenser / evaporator

[0039] 4 Solenoid reversing valve 2

[0040] 5 Refrigerant circuit

[0041] 6 Simplex Evaporator

[0042] 7 Circulating water circuit

[0043] 8 Water tank

[0044] 9 Circulation heating circuit

[0045] 10 Air Heater

[0046] 11 Pump 2

[0047] 12 Valve 2

[0048] 13 Pump 1

[0049] 14 Valve 1

[0050] 15, 15a, 15b Water channel

[0051] 16, 16a, 16b Refrigerant channels

[0052] 17 Throttle valve

[0053] 18a, 18b Refrigerant pipes

[0054] 19 Compressor

[0055] 20 Water outlet pipe 1

[0056] 21 Water outlet pipe 2

[0057] 22 Return pipe 1

[0058] 23 Return pipe 2

[0059] 24, 25, 26a, 26b Pipe

[0060] 27 Tee fitting. DETAILED DESCRIPTION

[0061] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0062] Embodiment: The present invention will be clearly described below with diagrams and detailed descriptions. After understanding the embodiments of the present invention, any person skilled in the art can make changes and modifications based on the techniques taught by the present invention without departing from the spirit and scope of the present invention.

[0063] The terms used herein are only for describing specific embodiments and are not intended to be limiting of the present invention. Singular forms such as "a", "this", "here", "this" and "the" as used herein also include plural forms.

[0064] The terms “first”, “second”, etc. used in this document do not specifically refer to an order or sequence, nor are they used to limit the present case. They are only used to distinguish components or operations described with the same technical terms.

[0065] As used herein, “connected” or “positioned” may refer to two or more components or devices being in direct physical contact with each other, or being in indirect physical contact with each other, or may refer to two or more components or devices operating or moving with each other.

[0066] The terms “include,” “including,” “have,” etc. used in this document are open-ended terms, meaning including but not limited to.

[0067] The terms used in this document generally have the ordinary meaning of each term used in this field, in the context of the case and in the specific context, unless otherwise noted. Certain terms used to describe the present invention will be discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in describing the present invention.

[0068] The terms "front", "back", "up", "down", "left", "right", etc. used in this article are all directional terms. In this case, they are only used to illustrate the positional relationship between the various structures, and are not used to limit the protection plan of this case and the specific direction during actual implementation.

[0069] See attached Figure 1 As shown, the embodiment of the utility model proposes a high-efficiency air-conditioning device used in a specific area in winter, and the air-conditioning device includes a conventional air-conditioning system 100 and an ice slurry energy storage and heat exchange system 200;

[0070] The conventional air conditioning system 100 includes an indoor evaporator / condenser 1, an outdoor condenser / evaporator 3, and a compressor 19;

[0071] The lower end of the indoor evaporator / condenser 1 is connected to the throttle valve 17 through the refrigerant pipeline 18a, and the lower end of the outdoor condenser / evaporator 3 is connected to the throttle valve 17 through the refrigerant pipeline 18b via the three-way pipe fitting 27;

[0072] The upper end of the indoor evaporator / condenser 1 is connected to the interface P1 of the electromagnetic reversing valve 2 through a pipe 24, the upper end of the outdoor condenser / evaporator 3 is connected to the interface A2 of the electromagnetic reversing valve 4 through a pipe 25, a pipe 26a of the compressor 19 is connected to the interface P1 of the electromagnetic reversing valve 2, and another pipe 26b of the compressor 19 is connected to the interface T1 of the electromagnetic reversing valve 2; the interface B1 of the electromagnetic reversing valve 2 is connected to the interfaces P2 and T2 of the electromagnetic reversing valve 4;

[0073] The ice slurry energy storage and heat exchange system 200 comprises a simplex evaporator 6, a water tank 8, and an air heater 10;

[0074] The simplex evaporator 6 is provided with a refrigerant channel 16 and a water channel 15. The refrigerant channel 16b at the lower end of the simplex evaporator 6 is connected to the refrigerant pipe 18b and the throttle valve 17 at the lower end of the outdoor condenser / evaporator 3 via a three-way pipe fitting 27. The refrigerant channel 16a at the upper end of the simplex evaporator 6 is connected to the interface B2 of the electromagnetic reversing valve 2 4.

[0075] The water tank 8 is connected to the water channel 15a at the upper end of the simplex evaporator 6 through a return water pipe 22; the water tank 8 is connected to the water channel 15b at the lower end of the simplex evaporator 6 through a water outlet pipe 20, and a valve 14 and a pump 13 are arranged in series on the water outlet pipe 20;

[0076] One end of the water tank 8 is connected to the air heater 10 via a return pipe 23, and the other end of the water tank 8 is connected to the air heater 10 via a water outlet pipe 21. A valve 2 12 and a pump 2 11 are arranged in series on the water outlet pipe 21.

[0077] In an embodiment of the utility model, the air conditioning device is configured to have a cooling mode, a heating mode, and an ice melting mode; wherein:

[0078] In the heating mode, the electromagnetic reversing valve 24 is opened, the valve 14 and the pump 13 are turned on, the refrigerant channel 16 of the simplex evaporator 6 is connected with the outdoor condenser / evaporator 3 to form a circulating refrigerant loop 5, and the water channel 15 of the simplex evaporator 6 is connected with the water tank 8, the water outlet pipe 120, and the return pipe 122 to form a circulating water loop 7, and the refrigerant absorbs the heat of the water, so that the water in the circulating water loop 7 is converted from normal water to supercooled water and then converted into ice slurry in the water tank 8;

[0079] In the ice melting mode, the electromagnetic reversing valve 24 is closed, the valve 14 and the pump 13 are closed, the valve 2 12 and the pump 2 11 are opened, and the air heater 10 is connected with the water tank 8, the water outlet pipe 21 and the water return pipe 23 to form a circulating heating loop 9 to melt the ice slurry in the water tank 8 into water.

[0080] The cooling mode is not a mode that needs to be improved specifically by the present invention, and is used in conventional air conditioners, so it will not be described in detail here; similarly, the conventional air conditioner uses an electromagnetic reversing valve 2 to switch the heating / cooling mode, which is not a technical feature of this patent and will not be described in detail.

[0081] In an embodiment of the utility model, the return water pipe is connected to the water outlet of the water tank located at the top of the water tank. Supercooled water is sprayed into the water tank from the water outlet on the top of the water tank and converted into ice slurry, effectively promoting the phase change process of supercooled water into ice slurry.

[0082] In an embodiment of the utility model, the return pipe 2 is connected to the water outlet of the water tank located at the top of the water tank. The supercooled water is heated by the air heater to become normal water. The high-temperature normal water is sprayed into the water tank from the water outlet on the top of the water tank to heat the ice-water mixture in the water tank, effectively promoting the phase change process of melting the ice slurry into water.

[0083] In the embodiment of the utility model, the first solenoid reversing valve and the second solenoid reversing valve are four-way solenoid reversing valves.

[0084] In the embodiment of the utility model, the water tank is a container for containing ice slurry, water or a mixture of ice slurry and water. Since the implementation of this solution has a large energy storage capacity, a smaller water tank can meet the heat exchange demand.

[0085] The working principle of the embodiment of the utility model is:

[0086] In heating mode: See attached Figure 2 As shown, when the outdoor air temperature is low, the outdoor condenser / evaporator 3 works in the evaporator state, and the temperature of its pipes and fins is lower than 0°C, the electromagnetic reversing valve 24 is opened to switch the outdoor condenser / evaporator 3 of the air conditioner to the simplex evaporator 6, and the refrigerant circulates in the circulating refrigerant circuit 5 between the refrigerant channel 16 of the simplex evaporator 6 and the outdoor condenser / evaporator 3. Valve 14 and pump 13 are opened, and the liquid water in the water tank 8 is pumped by pump 13 to circulate in the circulating water circuit 7 from the water tank 8, the outlet pipe 20, the water channel 15, and the return pipe 22 to the water tank 8. In the simplex evaporator 6, the refrigerant absorbs the heat of the water, so that the water changes from normal water to supercooled water. When the temperature is 0 to -3°C, the water can exist stably in a supercooled state without interference, and is converted into ice slurry after being sprayed into the water tank 8. The latent heat of phase change of water solidification is about 336KJ / Kg, which is much larger than the heat capacity of water when it rises or falls by 10℃ (specific heat 4.2KJ / KG·℃).

[0087] In ice melting mode: see attached Figure 3 As shown, when the daytime temperature rises to above 5°C, the electromagnetic reversing valve 24 is closed, the air conditioner simplex evaporator 6 is switched to the outdoor condenser / evaporator 3, and the valve 14 and pump 13 are closed at the same time, and the valve 212 and pump 211 are opened, and the ice melting mode is switched. The liquid water in the water tank 8 is pumped by the pump 211, and circulates in the circulating water loop 7 from the water tank 8, the outlet pipe 21, the air heater 10, and the return pipe 23 to the water tank 8. The ice-water mixture in the water tank 8 is heated by the air heater 10 to melt the ice slurry into water. When the ice slurry is completely melted, the air heater 10 is closed, and the valve 212 and pump 211 are closed, and the ice melting mode ends.

[0088] In the above embodiment of the utility model, the water outlet of the return pipe 1 22 connected to the water tank 8 is located at the top of the water tank 8, and the supercooled water is sprayed into the water tank 8 from the water outlet at the top of the water tank 8 and then converted into ice slurry, effectively promoting the phase change process of supercooled water into ice slurry. The water outlet of the return pipe 2 23 connected to the water tank 8 is located at the top of the water tank 8, and the supercooled water is heated by the air heater 10 to become normal water. The normal water with high temperature is sprayed into the water tank 8 from the water outlet at the top of the water tank 8 to heat the ice-water mixture in the water tank 8, effectively promoting the phase change process of ice slurry melting into water.

[0089] Through the implementation of the above technical solution, by adding an ice slurry energy storage and heat exchange system 200 on the basis of the conventional air conditioning system 100, when the environmental conditions are close to frosting, the air conditioning outdoor condenser / evaporator 3 is switched to the simplex evaporator 6 through the electromagnetic reversing valve 24. In the simplex evaporator 6, the water temperature is not lower than -5°C and will not freeze, so that the air conditioner is always kept in a high-efficiency heating state without turning on the electric heating; and when the ambient temperature rises, the mode is switched, and the ice-water mixture in the water tank 8 is heated by the air heater 10 to melt the ice slurry into water, waiting for the next use of the heating mode. The phase change latent heat of water solidification is about 336KJ / Kg, which is much larger than the heat capacity of water rising and falling by 10°C (specific heat 4.2KJ / KG·℃). The utility model mainly stores energy through phase change, which has a large energy storage capacity than the simple water temperature rise and fall, and the required water tank 8 is smaller in volume.

[0090] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A high-efficiency air conditioning device for use in winter, characterized in that: The air conditioning device includes an air conditioning system and an ice slurry energy storage and heat exchange system; The air conditioning system includes an indoor evaporator / condenser, an outdoor condenser / evaporator, and a compressor; The lower end of the indoor evaporator / condenser is connected to the throttle valve through a refrigerant pipeline, and the lower end of the outdoor condenser / evaporator is connected to the throttle valve through a refrigerant pipeline via a three-way pipe fitting; The upper end of the indoor evaporator / condenser is connected to the interface of the electromagnetic reversing valve 1 through a pipeline, the upper end of the outdoor condenser / evaporator is connected to the interface of the electromagnetic reversing valve 2 through a pipeline, one pipeline of the compressor is connected to the interface of the electromagnetic reversing valve 1, and another pipeline is connected to the interface of the electromagnetic reversing valve 1; the interface of the electromagnetic reversing valve 1 is connected to the two interfaces of the electromagnetic reversing valve 2; The ice slurry energy storage and heat exchange system comprises a simplex evaporator, a water tank, and an air heater; The simplex evaporator is provided with a refrigerant channel and a water channel, the refrigerant channel at the lower end of the simplex evaporator is connected to the refrigerant pipeline and the throttle valve at the lower end of the outdoor condenser / evaporator through a three-way pipe fitting, and the refrigerant channel at the upper end of the simplex evaporator is connected to the interface of the electromagnetic reversing valve 2; The water tank is connected to the water channel at the upper end of the simplex evaporator through a return water pipe 1; the water tank is connected to the water channel at the lower end of the simplex evaporator through a water outlet pipe 1, and a valve 1 and a pump 1 are arranged in series on the water outlet pipe 1; One end of the water tank is connected to the air heater through a second return pipe, and the other end of the water tank is connected to the air heater through a second outlet pipe. A second valve and a second pump are arranged in series on the second outlet pipe.

2. A high-efficiency air conditioning device for use in winter according to claim 1, characterized in that: The air conditioning device is configured to have a cooling mode, a heating mode, and an ice melting mode; wherein: In the heating mode, the electromagnetic reversing valve 2 is opened, the valve 1 and the pump 1 are turned on, the refrigerant channel of the simplex evaporator is connected with the outdoor condenser / evaporator to form a circulating refrigerant loop, and the water channel of the simplex evaporator is connected with the water tank, the water outlet pipe 1 and the water return pipe 1 to form a circulating water loop. The refrigerant absorbs the heat of the water, so that the water in the circulating water loop changes from normal water to supercooled water, and then is converted into ice slurry in the water tank; In the ice melting mode, the electromagnetic reversing valve 2 is closed, the valve 1 and the pump 1 are closed, the valve 2 and the pump 2 are opened, and the air heater is connected with the water tank, the water outlet pipe 2 and the water return pipe 2 to form a circulating heating loop to melt the ice slurry in the water tank into water.

3. A high-efficiency air conditioning device for use in winter according to claim 2, characterized in that: The water return pipe is connected to the water outlet of the water tank and is located at the top of the water tank.

4. A high-efficiency air conditioning device for use in winter according to claim 2, characterized in that: The water outlet of the return pipe 2 connected to the water tank is located at the top of the water tank.

5. A high-efficiency air conditioning device for use in winter according to claim 1, characterized in that: The first electromagnetic reversing valve and the second electromagnetic reversing valve are four-way electromagnetic reversing valves.

Images