Cold and hot water dispenser shared by cold and hot water and control method

Abstract

The invention relates to the field of water dispenser equipment, in particular to a cold and hot shared cold and hot water dispenser and a control method thereof.The cold and hot shared cold and hot water dispenser comprises a compressor, a condenser, an air cooling heat exchanger, an evaporator, a main water tank, a hot water tank and a cold water tank, and an outlet of the compressor is connected with an inlet of the condenser and one end of the air cooling heat exchanger through a first three-way valve; an outlet of the condenser is connected with an inlet of the evaporator and the other end of the air-cooled heat exchanger through a second three-way valve. An outlet of the evaporator is connected with an inlet of the compressor. An outlet of the main water tank is respectively connected with a hot water tank and a cold water tank, the hot water tank is bidirectionally connected with the condenser, and the evaporator is bidirectionally connected with the cold water tank. Condensation heat is recycled and used for heating drinking water by adopting a steam compression type refrigeration method, meanwhile, the water dispenser can realize three application scenes of only refrigeration without heating, only heating without refrigeration and simultaneous refrigeration and heating through opening and closing of each valve in the pipeline, and different application requirements of users are met.

Description

Technical Field

[0001] The present invention relates to the field of water dispenser equipment, in particular to a hot and cold water dispenser for both hot and cold water and a control method thereof. Background Art

[0002] A hot and cold water dispenser with vapor compression refrigeration is a drinking water device that combines cooling and heating functions. Its core technology is to achieve rapid cooling through a vapor compression refrigeration cycle, while using an independent heating system to provide hot water.

[0003] For example, CN219126029U discloses an instant hot and cold water dispenser with compressor refrigeration, comprising a water tank, on which an air inlet, a water inlet and a water outlet are provided, the water inlet of the water tank being connected to the outside; a cold tank, a diaphragm pump and a one-way valve, the water outlet of the water tank being connected to the water inlet of the cold tank, the water inlet of the diaphragm pump and the water inlet of the one-way valve respectively; a second water inlet valve, a heating body, a water vapor separator and hot and warm water taps, the water outlet of the diaphragm pump, the second water inlet valve and the water inlet of the heating body being connected in sequence, the water outlet of the heating body being connected to the water inlet of the water vapor separator, the water outlet of the water vapor separator being connected to the hot water tap. and the water inlet of the warm water faucet, the air outlet of the water-gas separator is connected to the air inlet of the water tank; a cold tank, a waste water valve and an evaporator, a water inlet, a waste water outlet and a water outlet are provided on the cold tank, the evaporator is located in the cold tank, the waste water outlet of the cold tank and the water outlet of the one-way valve are connected to the water inlet of the waste water valve, and the water inlet of the cold tank is connected to the water outlet of the water tank; a water outlet solenoid valve and a cold water faucet, the water outlet of the cold tank is connected to the water inlet of the cold water faucet through the water outlet solenoid valve; a condenser, a compressor and a drying filter, the outlet of the compressor is connected to the inlet of the compressor after passing through the condenser, the drying filter and the evaporator in sequence.

[0004] The above patent uses a compressor refrigeration system instead of electronic refrigeration, integrating a diaphragm pump and a multi-way valve structure to achieve coordinated control of the water tank, cold tank, heating body and water treatment module, but does not reuse the condensation heat, resulting in energy waste. Summary of the Invention

[0005] In view of the problem of condensation heat waste in the prior art, the present invention provides a hot and cold water dispenser with both hot and cold functions and a control method.

[0006] The present invention is achieved through the following technical solutions: A hot and cold water dispenser with both hot and cold water supply, comprising a compressor, a condenser, an air-cooled heat exchanger, an evaporator, a main water tank, a hot water tank, and a cold water tank. The outlet of the compressor is connected to the inlet of the condenser and one end of the air-cooled heat exchanger respectively through a first three-way valve, the outlet of the condenser is connected to the inlet of the evaporator and the other end of the air-cooled heat exchanger respectively through a second three-way valve, and the outlet of the evaporator is connected to the inlet of the compressor; the outlet of the main water tank is connected to the hot water tank and the cold water tank respectively, the hot water tank is bidirectionally connected to the condenser, and the evaporator is bidirectionally connected to the cold water tank; a heating rod is provided in the hot water tank; The second outlet of the second three-way valve is connected to the air-cooled heat exchanger via a first connecting pipe. A first pipe is led out of the first connecting pipe, and the other end of the first pipe is connected to the outlet of the condenser. A first solenoid valve is provided on the first pipe. The second outlet of the first three-way valve is connected to the air-cooled heat exchanger through a second connecting pipe. A second pipe is led out of the second connecting pipe, and the other end of the second pipe is connected to the outlet of the evaporator; a second solenoid valve is provided on the second pipe.

[0007] Preferably, a throttle valve is provided between the outlet of the condenser and the inlet of the second three-way valve.

[0008] Preferably, a first one-way valve is provided at the outlet of the condenser, and the inlet of the first pipeline is located between the throttle valve and the first one-way valve.

[0009] Preferably, a second one-way valve is provided at the outlet of the evaporator, and the inlet of the second pipeline is located between the second one-way valve and the inlet of the compressor.

[0010] Preferably, the outlet of the main water tank is located higher than the inlets of the hot water tank and the cold water tank.

[0011] Preferably, a first circulating water pump is provided between the hot water tank and the condenser to drive the water circulation; and a second circulating water pump is provided between the cold water tank and the evaporator to drive the water circulation.

[0012] A control method for a hot and cold water dispenser with both hot and cold functions, wherein the hot and cold water dispenser has a cooling mode, a heating mode, and a cooling and heating mode. The specific method is as follows: S1: Get the hot and cold water dispenser start command; S2: Get the cooling and heating mode start instruction; S3: Determine whether the cooling function needs to be turned on based on the temperature t1 of the drinking water in the cold water tank; if the cooling function needs to be turned on, proceed to step S4; otherwise, proceed to step S7; S4: Determine whether the heating function needs to be turned on based on the temperature t2 of the drinking water in the hot water tank; if it is determined that the heating function needs to be turned on, proceed to step S5; otherwise, proceed to step S6; S5: Keep the cooling and heating modes unchanged; S6: switch to cooling mode; S7: Switch to heating mode.

[0013] Preferably, in S5, in the cooling and heating mode, the second outlet of the first three-way valve connected to the air-cooled heat exchanger is closed, the first outlet connected to the condenser is opened, the first solenoid valve is closed, the first outlet of the second three-way valve connected to the evaporator is opened, the second outlet connected to the air-cooled heat exchanger is closed, and the second solenoid valve is closed.

[0014] Preferably, in S6, in the cooling mode, the second outlet of the first three-way valve connected to the air-cooled heat exchanger is opened, the first outlet connected to the condenser is closed, the first solenoid valve is opened, the first outlet of the second three-way valve connected to the evaporator is opened, the second outlet connected to the air-cooled heat exchanger is closed, and the second solenoid valve is closed.

[0015] Preferably, in S7, in the heating mode, the second outlet of the first three-way valve connected to the air-cooled heat exchanger is closed, the first outlet connected to the condenser is opened, the first solenoid valve is closed, the first outlet of the second three-way valve connected to the evaporator is closed, the second outlet connected to the air-cooled heat exchanger is opened, and the second solenoid valve is opened.

[0016] Compared with the prior art, the present invention has the following beneficial effects: This dual-use hot and cold water dispenser utilizes a vapor compression refrigeration method. The evaporator and condenser exchange heat with the drinking water in the cold and hot water tanks, respectively, storing both cold and heat. Combined with the heater in the hot water tank, this dispenser achieves dual cooling and heating functions, maximizing energy savings. It also boasts a compact structure, occupies a small space, and is easy to use.

[0017] Furthermore, the water outlet of the main water tank is higher than the inlets of the hot water tank and the cold water tank, so that the drinking water in the hot water tank and the cold water tank can be replenished by the main water tank through gravity.

[0018] Furthermore, the heating rod in the hot water tank can secondary heat the hot water from the condenser.

[0019] The present invention provides a control method for a hot and cold water dispenser with both hot and cold functions. By opening and closing valves in the pipeline, the water dispenser can realize three application scenarios: only cooling without heating, only heating without cooling, and simultaneous cooling and heating, to meet the different application needs of users, so as to make the application scenarios of drinking water more extensive. For application scenarios that do not require heating, an air-cooled heat exchanger can be switched to replace the condenser to discharge heat to the atmosphere; for application scenarios that do not require cooling, an air-cooled heat exchanger can be switched to replace the evaporator to absorb heat from the atmosphere. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a system diagram of a hot and cold water dispenser with both hot and cold functions according to the present invention; Figure 2 This is a control flow chart of a hot and cold water dispenser with both hot and cold functions according to the present invention.

[0021] In the figure, 1. compressor; 2. first three-way valve; 3. condenser; 4. first one-way valve; 5. first solenoid valve; 6. air-cooled heat exchanger; 7. throttle valve; 8. second three-way valve; 9. evaporator; 10. second one-way valve; 11. second solenoid valve; 12. main water tank; 13. hot water tank; 14. first circulating water pump; 15. second circulating water pump; 16. cold water tank. DETAILED DESCRIPTION

[0022] The present invention will be further described in detail below with reference to specific embodiments, which are intended to explain the present invention rather than to limit it.

[0023] The present invention discloses a hot and cold water dispenser for both hot and cold water. Figure 1 , including a compressor 1, a first three-way valve 2, a condenser 3, a first one-way valve 4, a first solenoid valve 5, an air-cooled heat exchanger 6, a throttle valve 7, a second three-way valve 8, an evaporator 9, a second one-way valve 10, a second solenoid valve 11, a main water tank 12, a hot water tank 13, a first circulating water pump 14, a second circulating water pump 15, and a cold water tank 16, wherein the outlet position of the main water tank 12 is higher than the inlets of the hot water tank 13 and the cold water tank 16.

[0024] The outlet of the compressor 1 is connected to the inlet of the first three-way valve 2, the first outlet of the first three-way valve 2 is connected to the inlet of the condenser 3, the second outlet of the first three-way valve 2 is connected to one end of the air-cooled heat exchanger 6, and a second pipe is led out between the two to connect to the outlet of the evaporator 9, and a second solenoid valve 11 is set on the second pipe.

[0025] The outlet of the condenser 3 is connected to the inlet of the second three-way valve 8 through the throttle valve 7 , the first outlet of the second three-way valve 8 is connected to the inlet of the evaporator 9 , and the outlet of the evaporator 9 is connected to the inlet of the compressor 1 .

[0026] The other end of the air-cooled heat exchanger 6 is connected to the second outlet of the second three-way valve 8, and a first pipe is led out between the two to connect to the outlet of the condenser 3, and a first solenoid valve 5 is provided on the first pipe.

[0027] The throttle valve 7 is provided between the outlet of the condenser 3 and the inlet of the second three-way valve 8 .

[0028] The first one-way valve 4 is arranged at the outlet of the condenser 3 , and the inlet of the first pipeline is located between the throttle valve 7 and the first one-way valve 4 .

[0029] The second one-way valve 10 is provided at the outlet of the evaporator 9 , and the inlet of the second pipeline is located between the second one-way valve 10 and the inlet of the compressor 1 .

[0030] The water circulation is driven between the hot water tank 13 and the condenser 3 by a first circulating water pump 14 ; the water circulation is driven between the cold water tank 16 and the evaporator 9 by a second circulating water pump 15 .

[0031] The present invention discloses a hot and cold water dispenser for both hot and cold water, comprising a refrigerant flow path and a circulating water flow path. The refrigerant flow path comprises a compressor 1, a condenser 3, an evaporator 9, a throttle valve 7, an air-cooled heat exchanger 6, a three-way valve, a one-way valve and a solenoid valve. The exhaust port of the compressor 1 is connected to the inlet of the first three-way valve 2 through a pipe. The two outlets of the first three-way valve 2 are respectively connected to the inlet of the condenser 3 and the air-cooled heat exchanger 6 through pipes. The outlet of the condenser 3 is connected to the inlet of the throttle valve 7 through a pipe. The outlet of the throttle valve 7 is connected to the outlet of the throttle valve 7 through a pipe. The inlet of the second three-way valve 8 is connected to the two outlets of the second three-way valve 8, which are respectively connected to the air-cooled heat exchanger 6 and the evaporator 9 via pipes. The outlet of the evaporator 9 is connected to the inlet of the compressor 1 via a pipe. The circulating water flow path includes a main water tank 12, a hot water tank 13, a cold water tank 16, and a circulating water pump. The water in the main water tank 12 is supplied to the hot water tank 13 and the cold water tank 16 by gravity. The water in the hot and cold water tanks 13 exchanges heat with the evaporator 9 and the condenser 3 respectively via the circulating water pump. A heating rod is also provided in the hot water tank 13. The present invention adopts vapor compression refrigeration, recycles the heat released by the condenser 3, and can achieve both cooling and heating functions. It can also achieve cooling without heating or heating without cooling according to demand.

[0032] See also Figure 2 The present invention also provides a control method for a hot and cold water dispenser system with both hot and cold water, comprising the following steps: S1: Get the hot and cold water dispenser start command; S2: Get the cooling and heating mode start instruction; S3: Determine whether the refrigeration function needs to be turned on; if it is determined that the refrigeration function needs to be turned on, proceed to step S4, otherwise proceed to step S7; determine whether the refrigeration function needs to be turned on based on the drinking water temperature t1 in the cold water tank 16; when t1 is less than 4°C, turn off the refrigeration function, and when t1 is greater than 8°C, turn on the refrigeration function again, and repeat this cycle.

[0033] S4: Determine whether the heating function needs to be turned on; if it is determined that the heating function needs to be turned on, proceed to step S5, otherwise proceed to step S6; determine whether the heating function needs to be turned on based on the drinking water temperature t2 in the hot water tank 13; when t2 is greater than 92°C, turn off the heating function, and when t2 is less than 88°C, turn on the heating function again, and repeat this cycle.

[0034] S5: Keep the cooling and heating modes unchanged; S6: switch to cooling mode; S7: Switch to heating mode.

[0035] The hot and cold water dispenser of the present invention needs to obtain the drinking water temperature t1 inside the hot water tank and the drinking water temperature t2 inside the cold water tank during control. If t1 is greater than 8°C and t2 is greater than 92°C, it switches to the cooling mode; if t1 is less than 4°C and t2 is less than 88°C, it switches to the heating mode; if t1 is greater than 8°C and t2 is less than 88°C, it switches to the cooling and heating mode. In other cases, the mode is not switched.

[0036] When both the cooling and heating functions are enabled, the second outlet of the first three-way valve 2 connected to the air-cooled heat exchanger 6 is closed, the first outlet connected to the condenser 3 is opened, the first solenoid valve 5 is closed, the first outlet of the second three-way valve 8 connected to the evaporator 9 is opened, the second outlet connected to the air-cooled heat exchanger 6 is closed, and the second solenoid valve 11 is closed. At this point, the hot and cold water dispenser operates as follows: high-temperature, high-pressure refrigerant gas discharged from the compressor 1 flows through the first three-way valve 2 to the condenser 3, where it condenses and releases heat to form high-temperature, high-pressure refrigerant liquid. The heat of condensation is absorbed by the cooling water. The high-temperature, high-pressure refrigerant liquid then flows through the one-way valve 4 to the throttle valve 7, where it is throttled and reduced in pressure to form low-temperature, low-pressure refrigerant. The low-temperature, low-pressure refrigerant then flows through the second three-way valve 8 to the evaporator, where it evaporates and absorbs heat to form low-temperature, low-pressure refrigerant gas. The heat absorbed comes from the chilled water. The low-temperature, low-pressure refrigerant gas then flows through the second one-way valve to the compressor inlet, completing a cycle.

[0037] When only the cooling function is enabled, the second outlet of the first three-way valve 2 connected to the air-cooled heat exchanger 6 is open, the first outlet connected to the condenser 3 is closed, the first solenoid valve 5 is open, the first outlet of the second three-way valve 8 connected to the evaporator 9 is open, the second outlet connected to the air-cooled heat exchanger 6 is closed, and the second solenoid valve 11 is closed. At this point, the hot and cold water dispenser operates as follows: high-temperature, high-pressure refrigerant gas discharged from the compressor 1 flows through the first three-way valve 2 to the air-cooled heat exchanger 6, where it condenses and releases heat to form high-temperature, high-pressure refrigerant liquid. This high-temperature, high-pressure refrigerant liquid then flows through the first solenoid valve 5 to the throttle valve 7, where it is throttled and reduced in pressure to form low-temperature, low-pressure refrigerant. The low-temperature, low-pressure refrigerant then flows through the second three-way valve 8 to the evaporator 9, where it evaporates and absorbs heat to form low-temperature, low-pressure refrigerant gas. The heat absorbed comes from the chilled water, and the low-temperature, low-pressure refrigerant gas flows through the second one-way valve to the compressor inlet, completing a cycle.

[0038] When only the heating function is enabled, the second outlet of the first three-way valve 2 connected to the air-cooled heat exchanger 6 is closed, the first outlet connected to the condenser 3 is opened, the first solenoid valve 5 is closed, the first outlet of the second three-way valve 8 connected to the evaporator 9 is closed, the second outlet connected to the air-cooled heat exchanger 6 is opened, and the second solenoid valve 11 is opened. At this time, the operation process of the hot and cold water dispenser is as follows: the high-temperature, high-pressure refrigerant gas discharged from the compressor 1 flows through the first three-way valve 2 to the condenser 3, where it condenses and releases heat to form a high-temperature, high-pressure refrigerant liquid. The heat of condensation is absorbed by the cooling water. The high-temperature, high-pressure refrigerant liquid flows through the one-way valve 4 to the throttle valve 7, where it is throttled to a low-temperature, low-pressure refrigerant. The low-temperature, low-pressure refrigerant then flows through the second throttle valve to the air-cooled heat exchanger 6, where it absorbs heat from the air and evaporates to form a low-temperature, low-pressure refrigerant gas. The low-temperature, low-pressure refrigerant gas flows through the second solenoid valve 11 to the compressor inlet, completing a cycle.

[0039] The disclosed invention utilizes a vapor compression refrigeration method, with the condenser directly exchanging heat with the drinking water in the hot water tank to recycle the condensation heat and maximize energy savings. Through a rational refrigerant flow path design, the condensation heat is recycled and used to heat the drinking water. Simultaneously, by opening and closing valves in the pipeline, the water dispenser can be configured for three application scenarios: cooling only, heating only, or simultaneous cooling and heating, meeting the user's diverse application needs.

[0040] The above description is merely a preferred embodiment of the present invention and is not intended to impose any limitation on the technical solution of the present invention. Those skilled in the art should understand that, without departing from the spirit and principles of the present invention, the technical solution can also be subjected to several simple modifications and replacements, and these modifications and replacements are also within the scope of protection covered by the claims.

Claims

1. A hot and cold water dispenser with both hot and cold functions, characterized in that: The invention comprises a compressor (1), a condenser (3), an air-cooled heat exchanger (6), an evaporator (9), a main water tank (12), a hot water tank (13) and a cold water tank (16); the outlet of the compressor (1) is connected to the inlet of the condenser (3) and one end of the air-cooled heat exchanger (6) respectively through a first three-way valve (2); the outlet of the condenser (3) is connected to the inlet of the evaporator (9) and the other end of the air-cooled heat exchanger (6) respectively through a second three-way valve (8); the outlet of the evaporator (9) is connected to the inlet of the compressor (1); the outlet of the main water tank (12) is connected to the hot water tank (13) and the cold water tank (16) respectively; the hot water tank (13) is bidirectionally connected to the condenser (3); and the evaporator (9) is bidirectionally connected to the cold water tank (16); a heating rod is provided in the hot water tank (13); The second outlet of the second three-way valve (8) is connected to the air-cooled heat exchanger (6) via a first connecting pipe, a first pipe is led out of the first connecting pipe, and the other end of the first pipe is connected to the outlet of the condenser (3); a first solenoid valve (5) is provided on the first pipe; The second outlet of the first three-way valve (2) is connected to the air-cooled heat exchanger (6) via a second connecting pipe, a second pipe is led out of the second connecting pipe, and the other end of the second pipe is connected to the outlet of the evaporator (9); a second solenoid valve (11) is provided on the second pipe.

2. The hot and cold water dispenser according to claim 1, characterized in that: A throttle valve (7) is provided between the outlet of the condenser (3) and the inlet of the second three-way valve (8).

3. The hot and cold water dispenser for both hot and cold water according to claim 2, characterized in that: A first one-way valve (4) is provided at the outlet of the condenser (3), and the inlet of the first pipeline is located between the throttle valve (7) and the first one-way valve (4).

4. The hot and cold water dispenser for both hot and cold water according to claim 1, characterized in that: A second one-way valve (10) is provided at the outlet of the evaporator (9), and the inlet of the second pipeline is located between the second one-way valve (10) and the inlet of the compressor (1).

5. The hot and cold water dispenser for both hot and cold water according to claim 1, characterized in that: The outlet of the main water tank (12) is located higher than the inlets of the hot water tank (13) and the cold water tank (16).

6. The hot and cold water dispenser for both hot and cold water according to claim 1, characterized in that: A first circulating water pump (14) is provided between the hot water tank (13) and the condenser (3) to drive the water circulation; and a second circulating water pump (15) is provided between the cold water tank (16) and the evaporator (9) to drive the water circulation.

7. A control method for a hot and cold water dispenser with both hot and cold functions according to any one of claims 1 to 6, characterized in that: The hot and cold water dispenser has cooling mode, heating mode and cooling and heating mode. The specific methods are as follows: S1: Get the hot and cold water dispenser start command; S2: Get the cooling and heating mode start instruction; S3: judging whether the cooling function needs to be turned on according to the temperature t1 of the drinking water in the cold water tank (16); if it is judged that the cooling function needs to be turned on, proceeding to step S4; otherwise, proceeding to step S7; S4: judging whether the heating function needs to be turned on according to the temperature t2 of the drinking water in the hot water tank (13); if it is judged that the heating function needs to be turned on, proceeding to step S5; otherwise, proceeding to step S6; S5: Keep the cooling and heating modes unchanged; S6: switch to cooling mode; S7: Switch to heating mode.

8. The control method according to claim 7, characterized in that: In S5, in the cooling and heating mode, the second outlet of the first three-way valve (2) connected to the air-cooled heat exchanger (6) is closed, the first outlet connected to the condenser (3) is opened, the first solenoid valve (5) is closed, the first outlet of the second three-way valve (8) connected to the evaporator (9) is opened, the second outlet connected to the air-cooled heat exchanger (6) is closed, and the second solenoid valve (11) is closed.

9. The control method according to claim 7, characterized in that: In S6, in the cooling mode, the second outlet of the first three-way valve (2) connected to the air-cooled heat exchanger (6) is opened, the first outlet connected to the condenser (3) is closed, the first solenoid valve (5) is opened, the first outlet of the second three-way valve (8) connected to the evaporator (9) is opened, the second outlet connected to the air-cooled heat exchanger (6) is closed, and the second solenoid valve (11) is closed.

10. The control method according to claim 7, characterized in that: In S7, in the heating mode, the second outlet of the first three-way valve (2) connected to the air-cooled heat exchanger (6) is closed, the first outlet connected to the condenser (3) is opened, the first solenoid valve (5) is closed, the first outlet of the second three-way valve (8) connected to the evaporator (9) is closed, the second outlet connected to the air-cooled heat exchanger (6) is opened, and the second solenoid valve (11) is opened.

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