CN201106956Y - Multiple source heat energy unit - Google Patents

Abstract

The utility model discloses a multiple source heat energy unit, including the compressor, first shell and tube heat exchanger, fin type heat exchanger, filter, refrigeration expansion valve, check valve, second shell and tube heat exchanger that connect gradually with the compressor, vapour and liquid separator still include with first shell and tube heat exchanger, fin type heat exchanger, second shell and tube heat exchanger, the cross valve that vapour and liquid separator connects, still be equipped with the regulation branch road of heating that comprises filter, heating expansion valve, check valve on the return circuit that fin type heat exchanger is connected with second shell and tube heat exchanger, this regulation branch road of heating and the refrigeration regulation branch road parallel connection who comprises filter, refrigeration expansion valve, check valve. The central air conditioning system integrates the functions of refrigeration, heating, refrigeration heat recovery, heating heat recovery, total heat and the like, and can defrost by using the defrosting electromagnetic valve when the central air conditioning system operates, so that the heat utilization efficiency of the unit is improved, the energy is saved, the environment is protected, and the central air conditioning system is convenient to use.

Description

Compound source thermal energy unit

technical field

The utility model relates to a central air-conditioning system, more specifically, relates to a system that integrates functions such as refrigeration, heating, heating, refrigeration heat recovery, heating heat recovery, and full heat, and can be operated in the central air-conditioning system. A compound source thermal energy unit that defrosts at any time.

Background technique

The functions of the existing central air-conditioning system are relatively single, and the functions of heating, heating, cooling heat recovery, heating heat recovery, and total heating are not integrated into one, which is not conducive to the full utilization of the central air-conditioning system, resulting in energy waste and is not conducive to energy conservation. ,protect environment. In addition, when defrosting the traditional central air-conditioning system, it needs to be shut down first, and then use the reverse cycle to defrost. The defrosting operation cannot be performed while the central air-conditioning system is running, which brings inconvenience to the user.

Utility model content

The purpose of this utility model is to overcome the above-mentioned defects in the prior art, and provide a system that integrates the functions of refrigeration, heating, heating, cooling heat recovery, heating heat recovery, and full heat, and can be used when the central air-conditioning system is running. A composite source thermal energy unit for defrosting.

In order to achieve the above purpose, the technical solution provided by the utility model is as follows: construct a composite source thermal energy unit, including a compressor, a first shell-and-tube heat exchanger, a finned heat exchanger, and a filter connected to the compressor in sequence , refrigeration expansion valve, one-way valve, second shell-and-tube heat exchanger, vapor-liquid separator, and also includes the first shell-and-tube heat exchanger, finned heat exchanger, and second shell-and-tube heat exchanger , the four-way valve connected to the gas-liquid separator, and the loop connecting the finned heat exchanger and the second shell-and-tube heat exchanger is also equipped with a system consisting of a filter, a heating expansion valve, and a one-way valve. The heat regulation branch is connected in parallel with the refrigeration regulation branch composed of a filter, a refrigeration expansion valve and a one-way valve. The first shell-and-tube heat exchanger is connected to the domestic water pump, and the second The double shell and tube heat exchanger is connected with the air conditioning water pump.

The outlet pipeline of the compressor is also connected with a defrosting solenoid valve, one end of the defrosting solenoid valve is connected with the outlet pipeline of the compressor, and the other end is connected with the defrosting inlet pipeline of the finned heat exchanger. The defrosting outlet pipe of the heat exchanger is connected with the outlet of the first shell and tube heat exchanger.

The beneficial effect of the composite source thermal energy unit described in the utility model is: by integrating the functions of refrigeration, heating, heating, refrigeration heat recovery, heating heat recovery, and full heat, it can be used to defrost when the central air-conditioning system is running. The solenoid valve is used for defrosting, which improves the heat utilization efficiency of the unit, is beneficial to energy saving, environmental protection, and is easy to use.

The combined source thermal energy unit described in the utility model will be further described below in conjunction with the accompanying drawings and embodiments:

Description of drawings

Fig. 1 is a schematic diagram of the system structure under the refrigeration mode of the composite source thermal energy unit described in the utility model;

Fig. 2 is a schematic diagram of the system structure of the heating sub-mode of the heating mode of the composite source thermal energy unit described in the present invention;

Fig. 3 is a schematic diagram of the system structure of the full heat sub-mode of the heating mode of the composite source thermal energy unit described in the utility model.

Detailed ways

Explanation of reference signs:

1. Compressor; 2. First shell and tube heat exchanger; 3. Finned heat exchanger; 4. Filter; 5. Refrigeration expansion valve; 6. Check valve; 7. Second shell and tube heat exchanger Heater; 8. Vapor-liquid separator; 9. Four-way valve; 10. Filter; 11. Heating expansion valve; 12. One-way valve; 13. Defrost solenoid valve; 14. Domestic water pump; 15. Air conditioning water pump ; 16, fan.

The following are the best embodiments of the combined source thermal energy unit described in the utility model, and the protection scope of the utility model is not limited thereby.

Referring to Fig. 1, a composite source thermal energy unit is provided, including a compressor 1, a first shell-and-tube heat exchanger 2, a finned heat exchanger 3, a filter 4, and a refrigeration expansion valve 5 sequentially connected to the compressor 1 , one-way valve 6, second shell-and-tube heat exchanger 7, vapor-liquid separator 8, also includes the first shell-and-tube heat exchanger 2, finned heat exchanger 3, second shell-and-tube heat exchanger device 7, the four-way valve 9 connected to the vapor-liquid separator 8, and the circuit where the finned heat exchanger 3 is connected to the second shell-and-tube heat exchanger 7 is also provided with a filter 10, a heating expansion valve 11. The heating regulation branch formed by the one-way valve 12 is connected in parallel with the cooling regulation branch composed of the filter 4, the cooling expansion valve 5 and the one-way valve 6. The first shell tube The type heat exchanger 2 is connected with the domestic water pump 14, and the second shell-and-tube heat exchanger 7 is connected with the air-conditioning water pump 15.

In cooling mode, the four-way valve 9 is not opened, and the fan 16 is controlled by the refrigerant outlet temperature of the first shell-and-tube heat exchanger 2 or the return water temperature of the first shell-and-tube heat exchanger 2 . When the outlet temperature of the refrigerant of the first shell-and-tube heat exchanger 2 or the return water temperature of the first shell-and-tube heat exchanger 2 is higher than the set temperature, the fan 16 starts. In the cooling mode, the air-conditioning water pump 15 and the domestic water pump 14 operate.

The high-temperature and high-pressure refrigerant discharged from the compressor 1 flows into the first shell-and-tube heat exchanger 2, and the refrigerant exchanges heat with domestic water in the first shell-and-tube heat exchanger 2. The temperature of the refrigerant decreases and the temperature of domestic water increases. The refrigerant flows into the finned heat exchanger 3 through the four-way valve 9, and exchanges heat with the air in the finned heat exchanger 3. The temperature of the refrigerant continues to decrease, and the refrigerant flows in through the filter 4, the refrigeration expansion valve 5, and the one-way valve 6. In the second shell-and-tube heat exchanger 7, the refrigerant evaporates and absorbs heat in the second shell-and-tube heat exchanger 7, the temperature of the air-conditioning water decreases, and the air-conditioning water pump 15 sends low-temperature cold water to the indoor terminal equipment to achieve the cooling effect. The refrigerant then flows into the gas-liquid separator 8 through the four-way valve 9, and finally flows into the compressor 1. Through this cycle, the refrigeration effect is realized continuously.

The outlet pipeline of the compressor 1 is also connected with a defrosting solenoid valve 13, one end of the defrosting solenoid valve 13 is connected with the outlet pipeline of the compressor 1, and the other end is connected with the defrosting inlet of the finned heat exchanger 3. The pipes are connected, and the defrosting outlet pipe of the finned heat exchanger 3 is connected with the outlet of the first shell and tube heat exchanger 2 . In the heating or full heating mode, when the finned heat exchanger 3 is frosted, the defrosting solenoid valve 13 is opened, and part of the high-temperature and high-pressure refrigerant flows through the finned heat exchanger 3 and flows to the finned heat exchanger. 3. Perform defrosting. When the defrosting is over, the defrosting solenoid valve 13 is closed.

The heating mode includes two sub-modes of full heat and heating, and the switching between the two modes is realized by an external selection switch. In the heating mode, the fan 16 starts when the four-way valve 9 is opened, and is not controlled by the temperature controller.

Referring to FIG. 2 , in the heating sub-mode, the air-conditioning water pump 15 is running, and the domestic water pump 14 is running. The control system detects the water flow switch of the air-conditioning water and controls the temperature of the air-conditioning water.

When the ambient temperature is less than or equal to 5°C and the water temperature of the air conditioner is less than or equal to the set water temperature -6°C, the electric heater starts;

When the ambient temperature > 5°C or the water temperature of the air conditioner > the set water temperature -2°C, the electric heater is turned off; in the heating mode, the high-temperature and high-pressure refrigerant discharged from the compressor 1 flows into the first shell-and-tube heat exchanger 2. The first shell-and-tube heat exchanger 2 exchanges heat with the domestic water, the temperature of the refrigerant decreases, and the temperature of the domestic water rises, realizing heat recovery for heating. The refrigerant flows into the second shell-and-tube heat exchanger 7 through the four-way valve 9, and The second shell-and-tube heat exchanger 7 exchanges heat with the air-conditioning water, and the temperature of the air-conditioning water rises, and then the high-temperature hot water is sent to the indoor terminal equipment by the air-conditioning water pump 15 to achieve the heating effect. The refrigerant passes through the filter 10 and heats up to expand. Valve 11 and one-way valve 12 flow into the finned heat exchanger 3 for heat exchange, and then flow into the compressor 1 through the four-way valve 9 and the gas-liquid separator 8, and so on. Circulation, so as to achieve the heating effect.

Referring to Fig. 3, in the full heat sub-mode, the air-conditioning water pump 15 is turned off, the domestic water pump 14 is running, and the high-temperature and high-pressure refrigerant discharged from the compressor 1 flows into the first shell-and-tube heat exchanger 2, where it Heater 2 exchanges heat with domestic water, the temperature of the refrigerant decreases, and the temperature of domestic water increases; the refrigerant flows into the second shell-and-tube heat exchanger 7 through the four-way valve 9, because the air-conditioning water pump 15 is closed, and the refrigerant flows into the second shell-and-tube heat exchanger 7. In the heat exchanger 7, there is very little heat exchange with the air-conditioning water, and a large amount of heat energy is transferred to the domestic water in the first shell-and-tube heat exchanger 2, achieving a full heat effect. Then the refrigerant flows into the finned heat exchanger 3 through the filter 10, the heating expansion valve 11 and the one-way valve 12. After heat exchange in the finned heat exchanger 3, the refrigerant flows through the four-way valve 9 and the gas-liquid separator. 8 into the compressor 1, so that the cycle goes round and round, so as to achieve the purpose of full heat.

Claims (2)

1. A compound source thermal energy unit, comprising a compressor (1), a first shell-and-tube heat exchanger (2), a finned heat exchanger (3), and a filter ( 4), refrigeration expansion valve (5), check valve (6), second shell-and-tube heat exchanger (7), vapor-liquid separator (8), is characterized in that, also includes and first shell-and-tube heat exchanger Heater (2), finned heat exchanger (3), second shell and tube heat exchanger (7), four-way valve (9) connected to vapor-liquid separator (8), said finned heat exchanger The circuit connecting the heater (3) and the second shell-and-tube heat exchanger (7) is also provided with a heating regulation system consisting of a filter (10), a heating expansion valve (11), and a one-way valve (12). The heating regulation branch is connected in parallel with the cooling regulation branch composed of filter (4), refrigeration expansion valve (5) and check valve (6), and the first shell-and-tube heat exchanger ( 2) It is connected with the domestic water pump (14), and the second shell-and-tube heat exchanger (7) is connected with the air-conditioning water pump (15). 2. The composite source thermal energy unit according to claim 1, characterized in that, the outlet pipeline of the compressor (1) is also connected with a defrosting solenoid valve (13), and one end of the defrosting solenoid valve (13) It is connected to the outlet pipe of the compressor (1), and the other end is connected to the defrosting inlet pipe of the finned heat exchanger (3), and the defrosting outlet pipe of the finned heat exchanger (3) is connected to the first shell tube Type heat exchanger (2) outlet connection.

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