Cold and heat combined supply system for motor home

Abstract

The utility model relates to the technical field of motor homes, in particular to a combined cooling and heating system for a motor home, the motor home comprises a shell, the shell defines an inner area located inside the motor home and an outer area located outside the motor home, and the combined cooling and heating system comprises a compressor, a heat exchanger, an expansion valve and a first evaporator. The heat exchanger is provided with a first branch and a second branch which can conduct heat exchange, the first evaporator is selectively in fluid communication with the interior area and the exterior area, and the compressor, the first branch, the expansion valve and the first evaporator are in fluid communication in sequence and form an air conditioner side loop for circulating flowing of refrigerants. The combined cooling and heating system further comprises a user water tank and a water pump, and the user water tank, the water pump and the second branch form a water side loop allowing domestic water to circularly flow. The combined cooling and heating system can effectively recycle and utilize heat generated and transferred by air conditioner refrigeration so as to provide the heat utilization rate of the motor home.

Description

Technical Field

[0001] The utility model relates to the technical field of recreational vehicles, in particular to a cooling and heating combined supply system for recreational vehicles. Background Art

[0002] RVs are vehicles equipped with living appliances for people, which can generally be divided into self-propelled and trailer-type. Living appliances equipped on RVs usually include air conditioners, water heaters, toilet facilities, televisions, stereos, etc. Among them, RVs have multiple cooling and heating needs such as air conditioning, showers, washing, and dishwashing. Traditional RVs mostly use independent air conditioning systems, and the heat generated and transferred by air conditioning is directly discharged into the external environment without being used, which reduces the heat utilization rate of RVs to a certain extent. Utility Model Content

[0003] In view of the technical problem that the heat utilization rate of the traditional RV is low, the utility model provides a combined cooling and heating system for the RV, which can recycle the heat generated and transferred by air conditioning refrigeration.

[0004] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a combined cooling and heating system for a recreational vehicle, the recreational vehicle comprising an outer shell, the outer shell defining an interior area located inside the recreational vehicle and an exterior area located outside the recreational vehicle, the combined cooling and heating system comprising a compressor, a heat exchanger, an expansion valve and a first evaporator, the heat exchanger having a first branch and a second branch for heat exchange, the first evaporator being selectively fluidly connected to the interior area and the exterior area, the compressor, the first branch, the expansion valve and the first evaporator being fluidly connected in sequence and forming an air-conditioning side loop for circulating refrigerant; the combined cooling and heating system further comprising a user water tank and a water pump, the user water tank, the water pump and the second branch forming a water side loop for circulating domestic water.

[0005] In the above technical solution, preferably, the combined heat and cold supply system also includes a second evaporator fluidically connected to the outside area of ​​the vehicle, the second branch, the second evaporator and the water pump are fluidically connected in sequence and form a bypass for domestic water bypassing the user water tank, and the combined heat and cold supply system can selectively open the bypass and the second evaporator.

[0006] In the above preferred scheme, it is further preferred that the combined heat and cold supply system also includes a first three-way valve and a second three-way valve, the first three-way valve includes a first flow port for fluid connection to the second branch, a second flow port for fluid connection to the user water tank, and a third flow port for fluid connection to the second evaporator; the second three-way valve includes a fourth flow port for fluid connection to the second evaporator, a fifth flow port for fluid connection to the user water tank, and a sixth flow port for fluid connection to the water pump, and the second flow port, the third flow port, the fourth flow port, and the fifth flow port can all independently adjust the opening degree.

[0007] In the above preferred solution, it is further preferred that a thermometer is arranged on the user water tank, and the combined cooling and heating system is constructed to selectively open the bypass and the second evaporator based on a signal from the thermometer.

[0008] In the above technical solution, preferably, the user water tank is equipped with a water outlet for outputting domestic water and a water level gauge for monitoring the water level, and the combined cooling and heating system is configured to selectively close the water outlet based on the signal of the water level gauge. It is also possible that the combined cooling and heating system further includes an electric heater, the inlet side fluid of the electric heater is connected to the water outlet of the user water tank, and the outlet side fluid of the electric heater is connected to the hot water equipment in the RV.

[0009] In the above technical solution, preferably, the outer shell forms an equipment room for placing the first evaporator, and the equipment room has a first movable door facing the interior area of ​​the vehicle and a second movable door facing the exterior area of ​​the vehicle, and the combined heat and cold supply system can selectively open the first movable door and the second movable door.

[0010] Compared with the air conditioning system of the traditional RV, the combined cooling and heating system provided by the technical solution of the utility model can transfer the heat generated and transferred by the air conditioning side loop in the refrigeration operation to the domestic water through the heat exchanger when the first evaporator is connected to the fluid in the vehicle area and refrigeration is performed, thereby realizing heat recovery and improving the heat utilization rate of the RV. In addition, when only domestic water heating is required and air conditioning refrigeration is not required, the first evaporator can be connected to the fluid outside the vehicle area, and the air conditioning side loop can transfer the heat from the outside area to the domestic water of the RV to heat the domestic water. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a system diagram of the combined cooling and heating system for a motor home provided by the utility model; wherein the direction indicated by the arrow in the diagram is the direction of refrigerant flow.

[0012] Note in the figure:

[0013] 10. Shell; 20. Inner area; 30. Outer area; 40. Equipment room; 50. Hot water equipment;

[0014] 1. compressor; 2. heat exchanger; 21. first branch; 22. second branch; 3. expansion valve; 4. first evaporator;

[0015] 5. User water tank; 51. Electric heater; 52. Water level gauge; 53. Thermometer;

[0016] 6. Water pump; 7. Second evaporator; 8. First three-way valve; 9. Second three-way valve. DETAILED DESCRIPTION

[0017] In order to explain in detail the technical content, structural features, objectives and effects of the present application, the technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0018] In this application, spatially relative terms such as "under", "below", "under", "lower", "above", "upper", "above", "higher", "side" (for example, as in "sidewall"), etc., are used to describe the relationship of one element to another (other) element as shown in the accompanying drawings. The spatially relative terms are intended to include different orientations of the device in use, operation and / or manufacture in addition to the orientation depicted in the accompanying drawings. For example, if the device in the accompanying drawings is turned over, the elements described as "under" or "beneath" other elements or features will then be positioned as "above" the other elements or features. Therefore, the exemplary term "under" can include both above and below orientations. In addition, the device can be positioned otherwise (for example, rotated 90 degrees or at other orientations), so the spatially relative descriptors used herein are interpreted accordingly.

[0019] In the present application, the term "hot water equipment" is a general term for equipment in an RV that requires hot water, such as shower heads, faucets for washing dishes, and the like.

[0020] Figure 1 The utility model shows a combined cooling and heating system for a motorhome (not shown in the figure), which can provide air conditioning refrigeration and domestic water heating for the motorhome at the same time. The domestic water can be used by users for showering, washing dishes, etc. For ease of description, the shell 10 structure of the motorhome will be shown as follows: Figure 1 As shown in the solid line frame in FIG. 1 , the housing 10 defines an interior area 20 located inside the RV and an exterior area 30 located outside the RV.

[0021] The combined cooling and heating system provided by the utility model is formed with an air conditioning side loop for circulating refrigerant and a water side loop for circulating domestic hot water. The combined cooling and heating system comprises a compressor 1, a heat exchanger 2 having a first branch 21 and a second branch 22, an expansion valve 3 and a first evaporator 4. The first and second branches of the heat exchanger 2 can respectively allow the refrigerant and domestic water to flow and perform heat exchange, and the air conditioning side loop is formed by the compressor 1, the first branch 21 of the heat exchanger 2, the expansion valve 3 and the first evaporator 4 being fluidly connected in sequence and connected end to end.

[0022] In the air-conditioning side circuit, the compressor 1 provides the power for the circulation of the refrigerant, and compresses the high-temperature and low-pressure refrigerant at the inlet into a high-temperature and high-pressure refrigerant; the heat exchanger 2 provides heat to the refrigerant to the outside, and converts the high-temperature and high-pressure refrigerant into a low-temperature and high-pressure refrigerant; the expansion valve 3 reduces the fluid pressure of the refrigerant to convert the low-temperature and high-pressure refrigerant into a low-temperature and low-pressure refrigerant; the evaporator 4 absorbs the heat of the refrigerant in the vehicle interior area 20 or the vehicle exterior area 30, and converts the low-temperature and low-pressure refrigerant into a high-temperature and low-pressure refrigerant.

[0023] The housing 10 of the RV is formed with an equipment room 40 for placing the evaporator 4, and the equipment room 40 has a first movable door (not shown in the figure) facing the vehicle interior area 20 and a second movable door (not shown in the figure) facing the vehicle exterior area 30. The combined cooling and heating system is configured to selectively open the first movable door or the second movable door. When the first movable door is opened, the first evaporator 4 located in the equipment room 40 is fluidly connected to the vehicle interior area 20; when the second movable door is opened, the first evaporator 4 located in the equipment room 40 is fluidly connected to the vehicle exterior area 30.

[0024] The combined cooling and heating system also includes a user water tank 5 for storing domestic water, a user water pump 6 for providing flow power for domestic water, and a second evaporator 7. The water side loop is formed by the user water tank 5, the water pump 6, and the second branch 22 of the heat exchanger 2 being fluidly connected in sequence and connected end to end. Among them, the user water tank 5 is provided with a water outlet (not shown in the figure) for conveying domestic water to the outside, and the second evaporator 7 is configured to be fluidly connected to the area outside the vehicle 30.

[0025] Furthermore, the combined heat and cold supply system also includes an electric heater 51 located downstream of the water outlet, the inlet side fluid of the electric heater 51 is connected to the water outlet of the user water tank 5, and the outlet side fluid of the electric heater 51 is connected to various hot water equipment 50 in the RV to improve the control accuracy of the water supply temperature of the RV.

[0026] The second branch 22 of the heat exchanger 2, the second evaporator 7 and the water pump 6 are fluidly connected in sequence and form a bypass (not shown in the figure) for domestic water to bypass the user's water tank 5. The combined heat and cold supply system is constructed to selectively open the bypass and cut off the fluid connection between the second branch 22 and the user's water tank 5.

[0027] This embodiment provides a technical solution that can realize the above-mentioned fluid path switching: the combined cooling and heating system also includes a first three-way valve 8 and a second three-way valve 9, the first three-way valve 8 has a first flow port for fluid connection to the second branch 22, a second flow port for fluid connection to the user water tank 5, and a third flow port for fluid connection to the second evaporator 7; the second three-way valve 9 has a fourth flow port for fluid connection to the second evaporator 7, a fifth flow port for fluid connection to the user water tank 5, and a sixth flow port for fluid connection to the second branch 22. Among them, the second and third flow ports of the first three-way valve 8 and the fourth and fifth flow ports of the second three-way valve 9 are all configured to be able to independently adjust the opening to realize the above-mentioned fluid path switching. In other embodiments, a valve group consisting of multiple independent valves can also be used to realize the above-mentioned fluid path switching.

[0028] The combined cooling and heating system of this embodiment has a combined cooling and heating mode that provides both air conditioning and domestic water heating. In this mode, the first movable door of the equipment room 40 is opened and the second movable door is closed, the compressor 1 and the water pump 6 are started at the same time, the bypass of the water side circuit is closed and the second evaporator 7 stops running. The water side circuit transfers part of the heat in the vehicle interior area 20 and the heat generated by itself to the domestic water of the RV through the heat exchanger 2, thereby realizing heat recovery and improving the heat utilization rate of the RV.

[0029] The combined cooling and heating system of this embodiment also has a single heating mode for heating domestic water. In this mode, the second movable door of the equipment room 40 is opened and the first movable door is closed, the compressor 1 and the water pump 6 are started at the same time, the bypass of the water side circuit is closed and the second evaporator 7 stops running. The water side circuit transfers part of the heat of the outside area 30 and the heat generated by itself to the domestic water of the RV through the heat exchanger 2 to heat the domestic water in the RV.

[0030] The combined cooling and heating system of this embodiment also has a single cooling mode for providing air conditioning refrigeration alone. In this mode, the first movable door of the equipment room 40 is opened and the second movable door is closed, the compressor 1, the water pump 6 and the second evaporator 7 are started at the same time, the bypass of the water side circuit is opened and the fluid path between the second branch 22 and the user water tank 5 is cut off. The water side circuit transfers part of the heat of the outside area 30 and the heat generated by itself to the domestic water of the RV through the heat exchanger 2, and then transfers the above heat to the outside area 30 through the second evaporator 7, thereby achieving a cooling effect on the inside area 20.

[0031] Furthermore, considering that too low a water level in the user water tank 5 may cause the water side circuit to be disconnected and the heat exchanger 2 to "burn dry", the user water tank 5 of the combined cooling and heating system is also equipped with a water level gauge 52 for monitoring the water level. The combined cooling and heating system is configured to selectively close the water outlet of the user water tank 5 based on a signal from the water level gauge 52 (e.g., the water level in the user water tank 52 is lower than a certain warning water level).

[0032] Furthermore, when the combined cooling and heating system is in the combined cooling and heating mode or the single heating mode, the temperature of the domestic water in the water side loop continues to rise, and the domestic water temperature may be too high, so that the air conditioning side loop cannot transfer heat to the domestic water, thereby causing various devices on the air conditioning loop to malfunction or even damage. For this reason, the user water tank 5 of the combined cooling and heating system is also equipped with a thermometer 53 that can measure the temperature of the domestic water. The combined cooling and heating system is configured to selectively open the bypass and the second evaporator 7 based on the signal of the thermometer 53 (such as the temperature of the domestic water in the user water tank 53 is higher than a certain warning temperature) to prevent the domestic water temperature from further rising.

[0033] The above embodiments are only for illustrating the technical concept and features of the present application, and their purpose is to enable people familiar with the technology to understand the content of the present application and implement it accordingly, and they cannot be used to limit the protection scope of the present application. Any equivalent changes or modifications made according to the spirit of the present application should be included in the protection scope of the present application.

Claims

1. A combined cooling and heating system for a motorhome, the motorhome comprising a housing, the housing defining an interior area located inside the motorhome and an exterior area located outside the motorhome, characterized in that: The combined cooling and heating system includes a compressor, a heat exchanger, an expansion valve and a first evaporator. The heat exchanger has a first branch and a second branch for heat exchange. The first evaporator can selectively fluidly connect the in-vehicle area and the outside of the vehicle. The compressor, the first branch, the expansion valve and the first evaporator are fluidly connected in sequence and form an air-conditioning side loop for circulating refrigerant. The combined cooling and heating system also includes a user water tank and a water pump. The user water tank, the water pump and the second branch form a water side loop for circulating domestic water.

2. The combined cooling and heating system according to claim 1, characterized in that: The combined heat and cold supply system also includes a second evaporator fluidly connected to the area outside the vehicle. The second branch, the second evaporator and the water pump are fluidly connected in sequence to form a bypass for domestic water to bypass the user water tank. The combined heat and cold supply system can selectively open the bypass and the second evaporator.

3. The combined cooling and heating system according to claim 2, characterized in that: It also includes a first three-way valve and a second three-way valve, the first three-way valve includes a first flow port for fluidly connecting to the second branch, a second flow port for fluidly connecting to the user water tank, and a third flow port for fluidly connecting to the second evaporator; the second three-way valve includes a fourth flow port for fluidly connecting to the second evaporator, a fifth flow port for fluidly connecting to the user water tank, and a sixth flow port for fluidly connecting to the water pump, and the second flow port, the third flow port, the fourth flow port, and the fifth flow port can all independently adjust the opening degree.

4. The combined cooling and heating system according to claim 2, characterized in that: The user water tank is provided with a thermometer, and the combined cooling and heating system is configured to selectively open the bypass and the second evaporator based on a signal from the thermometer.

5. The combined cooling and heating system according to claim 1, characterized in that: The user water tank is equipped with a water outlet for outputting domestic water and a water level gauge for monitoring the water level. The combined cooling and heating system is constructed to selectively close the water outlet based on a signal from the water level gauge.

6. The combined cooling and heating system according to claim 5, characterized in that: It also includes an electric heater, the inlet side fluid of the electric heater is connected to the water outlet of the user water tank, and the outlet side fluid of the electric heater is connected to the hot water equipment in the RV.

7. The combined cooling and heating system according to claim 1, characterized in that: The shell forms an equipment room for placing the first evaporator, and the equipment room has a first movable door facing the interior area of ​​the vehicle and a second movable door facing the exterior area of ​​the vehicle. The combined cooling and heating system can selectively open the first movable door and the second movable door.

Images