Energy-saving air water generator

Abstract

The utility model relates to an energy-saving air water generator which is characterized by comprising a compressor, a condenser, a four-way electric control valve, an evaporator and an inner cooling pipe placed in a water tank, a first branch of the output end of the compressor is sequentially connected with the input end of the condenser, the output end of the condenser, a first port of the four-way electric control valve, a fourth port of the four-way electric control valve, the input end of the inner cooling pipe, the output end of the inner cooling pipe and the input end of the compressor. A second branch of the output end of the compressor is sequentially connected with a second port of the four-way electric control valve, a third port of the four-way electric control valve, the input end of the evaporator, the output end of the evaporator and the input end of the compressor. The four-way electric control valve is electrically connected with the controller so as to control the first port and the third port of the four-way electric control valve to be communicated, the first port and the fourth port of the four-way electric control valve to be communicated, and the second port and the third port of the four-way electric control valve to be communicated or not communicated. The energy-saving air water generator is reasonable in design, and is beneficial to simplifying the equipment structure and reducing the manufacturing cost.

Description

Technical Field

[0001] This utility model relates to the field of air-to-water equipment, and in particular to an energy-saving air-to-water generator. Background Technology

[0002] One type of air-to-water generator is a device that converts moisture in the air into clean drinking water. Its working principle mainly includes the following aspects: 1. Air collection, 2. Air purification, 3. Air condensation, and 4. Condensate filtration. The above steps enable the moisture in the air to be converted into drinking water.

[0003] For example, the applicant's application dated February 2, 2016, entitled "An Air Condensation Water Production Mechanism for a Tea Machine" (publication number CN205444309U), includes a cabinet. An air filter is installed on one side of the upper part of the cabinet. An evaporator for air cooling is installed behind the filter. A condenser is connected to the rear of the evaporator. A cooling device containing a negative ion generator is installed behind the condenser. A water collection tray is installed below the evaporator and connected to a water tank for liquid water collection. This water production mechanism is not only simple in structure but also convenient for condensation water production, and the discharged air contains negative air ions.

[0004] For example, the "Split-type Combined Tea Table Machine Device" applied for by the applicant on June 22, 2018, with announcement number CN209003110U, the split-type combined tea table machine device includes an independent first cabinet and a second cabinet. The first cabinet is equipped with an air condensation water production device and a lower water tank for collecting the water produced by the air condensation water production device. The second cabinet is equipped with a water filtration device and an upper water tank for storing the filtered water. The lower water tank is connected to the water inlet of the water filtration device through a first pipe, and the upper water tank is equipped with a water outlet. This split-type combined tea table machine device has a simple structure and reasonable design, which is conducive to convenient installation and use.

[0005] The two patents mentioned above can achieve water production from air, but cannot achieve multiple functions such as air-cooled water. Therefore, the applicant filed an application on April 3, 2020, for "A Multifunctional Household Heat Exchanger" (publication number CN211823229U), which specifically relates to a multifunctional household heat exchanger, including a liquid storage tank, compressor, condenser, filter, evaporator, and water production device connected in sequence. The filter is connected to the evaporator through a capillary tube, and the evaporator is connected to the liquid storage tank through a return pipe. It also includes a first refrigeration valve, a cold water tank, a temperature sensor, a first copper pipe, a second refrigeration valve, a refrigerator, a thermostat, and a second copper pipe. Although this patent can simultaneously have multiple functions such as water production, heating cold water, and food refrigeration and preservation, and can fully utilize the heat of the high-temperature refrigerant output by the compressor to improve energy efficiency, the device uses many components, resulting in higher production costs.

[0006] In addition, the previous air water and refrigeration water generally uses the independent setting refrigeration water system and water system (i.e. Figure 11 As shown), they use the power of different compressors to be responsible for water and refrigeration respectively; In order to better play the efficiency of the compressor, the water condenser and the refrigeration condenser are different in size, and the capillary 1 and the capillary 2 are different in diameter and length. SUMMARY

[0007] In view of the above deficiencies of the prior art, the purpose of the utility model is to provide an energy-saving air water machine, which is reasonable in design and is beneficial to simplify the equipment structure and reduce the manufacturing cost.

[0008] The energy-saving air water machine of the utility model, characterized in that: comprising compressor, condenser, four-way electric control valve, evaporator and inner cooling pipe placed in water tank, the first branch of the output end of the compressor is connected with the input end of the condenser, the output end of the condenser, the first port of the four-way electric control valve, the fourth port of the four-way electric control valve, the input end of the inner cooling pipe, the output end of the inner cooling pipe and the input end of the compressor in turn;The second branch of the output end of the compressor is connected with the second port of the four-way electric control valve, the third port of the four-way electric control valve, the input end of the evaporator, the output end of the evaporator and the input end of the compressor in turn;The four-way electric control valve is electrically connected with the controller to control the realization that the first port and the third port of the four-way electric control valve are communicated, the first port and the fourth port are communicated, the second port and the third port are communicated or all are not communicated.

[0009] Further, it further includes the water collecting tray for collecting the condensed water generated on the fin of the evaporator below the evaporator.

[0010] Further, the above-mentioned four-way electric control valve includes a valve body, a valve cavity arranged in the valve body, a first port, a second port, a third port and a fourth port fixedly installed on the valve body, and a valve plate driven to rotate by a motor is installed in the valve cavity, and a notch is arranged on the valve plate, and the notch is communicated with the first port and the third port, the notch is communicated with the first port and the fourth port, the notch is communicated with the second port and the third port, or the notch is not communicated with each port under the driving of the motor.

[0011] Further, the above-mentioned motor is a stepping motor, and the overlapping area of the notch on the valve plate and each port is controlled by the motor to realize the control of the refrigerant flow.

[0012] Further, the above-mentioned valve plate is installed at the lower port of the circumferential pipe body with an inner ring gear, the inner ring gear of the circumferential pipe body is engaged with the gear of the output end of the motor, a limiting block is arranged on the outer peripheral wall of the circumferential pipe body, and a limiting plate limiting the rotation amplitude of the limiting block is arranged on the valve body.

[0013] Further, the notch on the valve plate is a sector-shaped notch with an included angle of 120 degrees, and the ports are arranged in the circumferential direction in the order of the second port, the third port, the first port and the fourth port, and the included angles of the centers of the ports are 60 degrees between the second port and the third port, 85 degrees between the third port and the first port, 60 degrees between the first port and the fourth port, and 155 degrees between the fourth port and the second port.

[0014] Further, the controller is electrically connected with the environment temperature and humidity collector, so that the flow of the refrigerant of the first port and the third port is adjusted according to the temperature and humidity detected by the environment temperature and humidity collector, and more water is obtained.

[0015] Further, the controller is electrically connected with the temperature collector installed on the water tank, so that the flow of the refrigerant of the first port and the fourth port is adjusted according to the temperature of the cold water detected by the temperature collector, and the refrigeration time is shortened.

[0016] Further, the compressor is a variable frequency compressor, and the fan installed on the side of the evaporator is a speed-adjustable fan, and the variable frequency compressor and the speed-adjustable fan are electrically connected with the controller.

[0017] The working method of the energy-saving air water generator,

[0018] (1) in the starting position, the controller controls that the first port, the second port, the third port and the fourth port are not communicated, and the compressor does not work, so that the equipment does not work at this time;

[0019] (2) when water is needed, the controller controls that the first port and the third port are communicated, and the other ports are not communicated, and controls the compressor to work, in the working process, the condensed water generated on the evaporator fin falls into the water pan located below the evaporator, realizing the water making of the equipment, and the controller is electrically connected with the environment temperature and humidity collector, so that the flow of the refrigerant of the first port and the third port is adjusted according to the temperature and humidity detected by the environment temperature and humidity collector, so that the opening degree of the four-way electric control valve is different under different environment temperature and humidity conditions, and the best water making amount is obtained;

[0020] (3) when refrigerated water is needed, the controller controls that the first port and the fourth port are communicated, and the other ports are not communicated, and controls the compressor to work, so that the inner cooling pipe in the water tank generates condensation, realizing the cooling of the water in the water tank, and realizing the refrigerated water of the equipment; the controller is electrically connected with the temperature collector, and the flow of the refrigerant of the first port and the fourth port is adjusted according to the temperature detected by the temperature collector, so as to improve the refrigerated water speed and shorten the refrigeration use time.

[0021] (4) when defrosting at low temperature, the controller controls that the second port and the third port are communicated (100% opening), and the other ports are not communicated, and a large amount of high-temperature and high-pressure gas is injected into the evaporator to realize rapid defrosting.

[0022] When the compressor is stopped, the four-way electric control valve is in full closed state, all circuits are closed to prevent refrigerant from flowing from the condenser to the evaporator, and energy loss is avoided when the compressor is started again; when the compressor is started, the four-way electric control valve is controlled to be fully opened first, that is, the first port and the third port are communicated, or the first port and the fourth port are communicated, so that the suction and discharge pressures are rapidly balanced, and then the compressor is started, so that the light load start of the compressor is realized and the heat loss caused by the start and stop of the compressor is reduced.

[0023] When the ambient temperature and humidity are too high, whether in the water making working state (the first port and the third port are communicated) or in the refrigeration working state (the first port and the fourth port are communicated), when the compressor discharge temperature (or the compressor output pressure) is too high, which is detected by the temperature sensors installed at the compressor inlet and outlet, the valve opening degree is increased to the maximum, the refrigerant flow is increased, the compressor suction is cooled, the discharge temperature is reduced, and the corresponding protection effect is achieved, so that the compressor is prevented from being stopped.

[0024] The air water generator of the utility model uses the four-way electric control valve, can simplify a refrigeration compressor, a refrigeration valve, a defrosting valve and a throttling capillary tube; and can dynamically adjust the throttling parameters according to the environmental temperature and humidity and other parameters, realize high-precision adjustment, reduce the refrigeration time and the defrosting time, and more water can be obtained under the same power consumption. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is the working principle diagram of one embodiment of the utility model;

[0026] Figure 2 is the working principle diagram of another embodiment of the utility model;

[0027] Figure 3 is the perspective view of the four-way electric control valve of the utility model;

[0028] Figure 4 is the exploded view of Figure 3 ;

[0029] Figure 5 is the sectional view of Figure 3 ;

[0030] Figure 6 is the perspective view of the circumferential pipe body;

[0031] Figure 7 is the position diagram of the notch of the valve plate relative to each port (initial position);

[0032] Figure 8 is the position diagram of the notch of the valve plate relative to the first port and the third port (water making position);

[0033] Figure 9is the position map (cooling water position) that the notch of the valve disc communicates with the first port and the fourth port;

[0034] Figure 10 is the position map (defrosting position) that the notch of the valve disc communicates with the second port and the third port;

[0035] Figure 11 is a prior art working schematic diagram. DETAILED DESCRIPTION

[0036] The utility model discloses an energy-saving air water generator, which comprises a compressor 1, a condenser 2, a four-way electric control valve 3, an evaporator 4 and an inner cooling pipe 6 placed in a water tank 5.

[0037] In order to collect condensed water, the water generator further comprises a water collecting tray 8 arranged below the evaporator and used for collecting condensed water generated on the fins of the evaporator.

[0038] The water tank 5 is provided with a water inlet and a water outlet to supply water to the water tank 5 and discharge water.

[0039] If the four-way electric control valve 3 is an electromagnetic control valve, it needs to be continuously powered, which consumes a large amount of electric energy.

[0040] The four-way electric control valve 3 comprises a valve body 301, a valve cavity 302 arranged in the valve body, a first port A, a second port B, a third port C and a fourth port D fixedly installed on the valve body, a valve disc 303 driven to rotate by a motor 9 is arranged in the valve cavity, a notch 304 is arranged on the valve disc, and the valve disc 303 is driven to rotate by the motor during work.

[0041] The four-way electric control valve 3 of the application adopts the above structure, and the motor is started for a short time when different passages are needed, so that different passages can be realized, the energy saving effect is good, and the service life of the four-way electric control valve 3 can be prolonged.

[0042] The motor is preferably a stepping motor, and the overlapping area of the notch on the valve piece and each port is controlled by the motor to realize the control of the refrigerant flow. Specifically, the controller 7 is electrically connected with the environment temperature and humidity collector 10, the motor is controlled according to the temperature and humidity detected by the environment temperature and humidity collector to adjust the refrigerant flow of the first port and the third port, and more water production can be obtained.

[0043] The controller 7 is electrically connected with the temperature collector 11 installed on the water tank to control the motor 9 according to the temperature of the cold water detected by the temperature collector to adjust the refrigerant flow of the first port and the fourth port, and the refrigeration time is shortened.

[0044] The compressor 1 can be a variable frequency compressor, the fan 12 installed beside the evaporator is a variable speed fan, and the variable frequency compressor and the variable speed fan are electrically connected with the controller.

[0045] The mechanical structure of the four-way electric control valve 3 is shown in the figure, the gear 901 on the output end of the commercially available motor 9 is engaged with the inner gear ring 305 of the valve piece 303.

[0046] The valve piece 303 is installed at the lower end of the circumferential pipe body 306 with the inner gear ring 305 (or the valve piece 303 is integrally made with the circumferential pipe body 306), the inner gear ring 305 of the circumferential pipe body is engaged with the gear 901 of the output end of the motor 9, the limiting block 307 is arranged on the outer peripheral wall of the circumferential pipe body 306, the limiting plate 308 for limiting the rotation amplitude of the limiting block is arranged on the valve body, and under the condition that the motor 9 is powered (the controller 7 controls the motor 9 to rotate forward or reverse, and the forward or reverse rotation time), the notch of the valve piece 303 is in communication with different ports.

[0047] In order to design reasonably, the notch 304 on the valve piece is a sector-shaped notch with an included angle of 120 degrees, the ports are arranged in the circumferential direction in sequence as the second port, the third port, the first port and the fourth port, and the included angles of the centers of the ports are respectively 60 degrees between the second port and the third port, 85 degrees between the third port and the first port, 60 degrees between the first port and the fourth port, and 155 degrees between the fourth port and the second port.

[0048] The working method of the energy-saving air water generator of the application is as follows:

[0049] (1) In the starting position, the controller controls that the first port, the second port, the third port and the fourth port are not communicated, and the compressor does not work, at this time, the equipment does not work (the relative positions of the notch of the valve piece and each port controlled by the controller are shown in the figure Figure 7 ).

[0050] (2) When water is needed, the controller controls the first port to communicate with the third port, and other ports do not communicate (the relative position of the valve piece gap and the first port and the third port is as shown in Figure 8 ), and the compressor is controlled to work. During the working process, the condensed water generated on the evaporator fins falls into the water pan located below the evaporator, realizing water production of the equipment. The controller is electrically connected with the environment temperature and humidity collector, and the motor is controlled according to the temperature and humidity detected by the environment temperature and humidity collector 10 to adjust the flow of refrigerant of the first port and the third port, so that the opening degree of the four-way electric control valve is different under different environment temperature and humidity conditions, and the best water production is obtained;

[0051] When the environment temperature is 35 degrees and the relative humidity is 60%, the valve opening degree is 80% (referring to 80% of the maximum flow of the first port and the third port, and the maximum flow refers to the gap completely covering the two ports); when the environment temperature is 25 degrees and the relative humidity is 60%, the valve opening degree is 60%; when the environment temperature is 20 degrees and the relative humidity is 60%, the valve opening degree is 50%.

[0052] When the environment temperature and humidity are high, the water content in the air is high, and more cooling capacity is needed to condense the water into water and reduce the surface temperature of the evaporator. At this time, the opening degree of the valve should be larger; when the environment temperature and humidity decrease, the water content in the air is low, and less cooling capacity is needed. At this time, the opening degree of the valve should be smaller (such as being provided with a variable frequency compressor, the working frequency of the compressor can also be reduced to reduce power consumption); reduce the waste of refrigeration capacity, avoid insufficient evaporation of the evaporator due to heat absorption, and still low-temperature and low-pressure liquid returning to the compressor, causing liquid strike and damaging the compressor; by adjusting the opening degree of the valve, the environment temperature and humidity entering the frosting working condition can be reduced, and the temperature and humidity range of normal water production is expanded.

[0053] (3) When refrigerated water is needed, the controller controls the first port to communicate with the fourth port, and other ports do not communicate, and the compressor is controlled to work (the relative position of the valve piece gap and the first port and the fourth port is as shown in Figure 9 ), and the inner cooling pipe in the water tank produces condensation, realizing cooling of the water in the water tank, realizing refrigerated water of the equipment. The controller 7 is electrically connected with the temperature collector 11, and the motor 9 is controlled according to the temperature detected by the temperature collector to adjust the flow of refrigerant of the first port and the fourth port, improve the refrigerated water speed, and shorten the refrigeration use time;

[0054] When the ambient temperature is 35 degrees and the water temperature in the cold water tank (i.e. the water tank 5) is above 15 degrees, the opening degree of the valve is 70% (referring to 70% of the maximum flow capacity of the first port and the fourth port); when the ambient temperature is 35 degrees and the water temperature in the cold water tank is between 10-15 degrees, the opening degree of the valve is 50%; when the ambient temperature is 35 degrees and the water temperature in the cold water tank is between 6-10 degrees, the opening degree of the valve is 30%; when the ambient temperature is 35 degrees and the water temperature in the cold water tank is above 15 degrees and needs to be reduced to below 6 degrees, more cooling capacity is required.

[0055] When the surface temperature of the inner cooling pipe is reduced, the opening degree of the valve needs to be larger; when the cold water temperature is reduced to between 10-15 degrees or 6-10 degrees, there is thin ice or thick ice on the surface of the inner cooling pipe, which has a poor ability to absorb and conduct heat compared with water, so less or more cooling capacity is required, and the opening degree of the valve is smaller or smaller again (if a variable frequency compressor is provided, the working frequency of the compressor can also be reduced to reduce power consumption); so as to reduce the waste of refrigeration capacity, avoid insufficient heat absorption and evaporation of the inner cooling pipe, and return the low-temperature and low-pressure liquid to the compressor to cause liquid hammer and damage the compressor.

[0056] (4) When defrosting at low temperature, the controller 7 controls the second port and the third port to be communicated (100% open), and the other ports are not communicated (the relative positions of the valve piece gap and the second port and the third port are as shown in Figure 10 ), a large amount of high-temperature and high-pressure gas flows into the evaporator to achieve rapid defrosting.

[0057] The defrosting principle of the application is as follows: when working at low temperature (the ambient temperature is below 18 degrees), the condensate water on the surface of the evaporator is as low as freezing, which affects the flow of air and wind, and when the controller detects that the evaporator surface is frozen through the temperature sensor installed on the evaporator, the defrosting valve is opened (i.e. the second port and the third port are 100% open and communicated), and the compressor operates to discharge high-temperature and high-pressure gas directly into the inner pipeline of the evaporator to directly melt the ice on the surface.

[0058] When the controller detects that the evaporator is thawed (the temperature is greater than 4 degrees) through the temperature sensor installed on the evaporator, the defrosting valve is turned off, and at this time the system enters the water making (or chilled water making) state again.

[0059] The application can reduce the energy loss in the start-stop process in the start-stop control of the compressor: the four-way electric control valve 3 of the utility model can be in a full closed state when the compressor 1 is stopped, all circuits are turned off to prevent the refrigerant from flowing from the condenser 2 to the evaporator 4, and the energy loss of the next start is avoided; when the compressor 1 is started, the four-way electric control valve 3 is first controlled to be fully opened, i.e. the first port and the third port are communicated, or the first port and the fourth port are communicated, so that the suction and exhaust pressures quickly reach balance, and then the compressor 1 is started, so that the light load start of the compressor is realized and the heat loss caused by the start-stop of the compressor is reduced.

[0060] When the four-way electric control valve 3 of the utility model is used, the exhaust temperature of the compressor can be controlled: when the ambient temperature and humidity are too high, whether in the water making working state (the first port and the third port are communicated) or in the refrigeration working state (the first port and the fourth port are communicated), the controller 7 detects that the exhaust temperature of the compressor is too high (or the output pressure of the compressor is too high) through the temperature sensor 13, and the valve opening degree is increased (i.e. the notch on the valve piece and the port overlap area are maximum) to the maximum (if a variable frequency compressor is matched, the working frequency of the compressor can be reduced simultaneously, if a speed-regulating fan is matched, the rotating speed of the fan can be increased), the refrigerant flow is increased, the compressor return gas is cooled, so that the exhaust temperature is reduced, the corresponding protection effect is achieved, and the compressor is prevented from stopping.

[0061] Compared with the prior art, when the defrosting circuit is communicated, the other two circuits are not communicated, the valve opening degree is maximum (the second port and the third port are 100% opened and communicated) during defrosting, the high-temperature and high-pressure gas discharged by the compressor is all introduced into the defrosting circuit, the refrigerant is circulated in a large flow, the defrosting time is shortened, and the defrosting efficiency is improved.

[0062] The air water generator uses the four-way electric control valve, can simplify a refrigeration compressor, a refrigeration valve, a defrosting valve and a throttling capillary, can dynamically adjust the throttling parameter according to the ambient temperature and humidity and the like, realizes high-precision adjustment, reduces the refrigeration time and the defrosting time, and more water can be obtained under the same power consumption.

[0063] Under the high-temperature and high-humidity working condition, the compressor works at a high frequency, and the fan works at a low speed, so that the maximum water making amount can be obtained, the compressor and the fan work at a low speed at night, noise is reduced, and the influence on people is reduced.

[0064] The above only describes preferred embodiments of the utility model, and any change and modification made within the scope of the utility model patent application shall belong to the scope of the utility model.

Claims

1. An energy-saving air-to-water generator, characterized in that: The system includes a compressor, a condenser, a four-way solenoid valve, an evaporator, and an internal cooling pipe placed in a water tank. The first branch of the compressor's output end is sequentially connected to the input end of the condenser, the output end of the condenser, the first port of the four-way solenoid valve, the fourth port of the four-way solenoid valve, the input end of the internal cooling pipe, the output end of the internal cooling pipe, and the input end of the compressor. The second branch of the compressor's output end is sequentially connected to the second port of the four-way solenoid valve, the third port of the four-way solenoid valve, the input end of the evaporator, the output end of the evaporator, and the input end of the compressor. The four-way solenoid valve is electrically connected to a controller to control whether the first port of the four-way solenoid valve is connected to the third port, the first port is connected to the fourth port, the second port is connected to the third port, or neither port is connected.

2. The energy-saving air-to-water generator according to claim 1, characterized in that: It also includes a drip tray located below the evaporator to collect the condensate generated on the evaporator fins.

3. The energy-saving air-to-water generator according to claim 1, characterized in that: The four-way electrically controlled valve includes a valve body, a valve cavity disposed within the valve body, and a first port, a second port, a third port, and a fourth port fixedly installed on the valve body. A valve plate driven to rotate by a motor is installed in the valve cavity. The valve plate has a notch. When the valve plate is driven to rotate by the motor, the notch can be connected to the first port and the third port, the notch can be connected to the first port and the fourth port, the notch can be connected to the second port and the third port, or the notch can be disconnected from all ports.

4. The energy-saving air-to-water generator according to claim 3, characterized in that: The motor is a stepper motor, and the overlap area between the notch on the valve plate and each port is controlled by the motor to control the refrigerant flow.

5. The energy-saving air-to-water generator according to claim 4, characterized in that: The valve plate is installed at the lower end of a circumferential tube with an internal gear ring. The internal gear ring of the circumferential tube meshes with the gear at the output end of the motor. A limiting block is provided on the outer circumferential wall of the circumferential tube, and a limiting plate is provided on the valve body to limit the rotation amplitude of the limiting block.

6. The energy-saving air-to-water generator according to claim 5, characterized in that: The notch on the valve plate is a fan-shaped notch with an included angle of 120 degrees. The ports are arranged in the circumferential direction as the second port, the third port, the first port, and the fourth port. The included angles between the centers of the ports are 60 degrees between the second port and the third port, 85 degrees between the third port and the first port, 60 degrees between the first port and the fourth port, and 155 degrees between the fourth port and the second port.

7. The energy-saving air-to-water generator according to claim 4, 5 or 6, characterized in that: The controller is electrically connected to the ambient temperature and humidity sensor to control the motor and adjust the refrigerant flow rate at the first and third ports based on the temperature and humidity detected by the sensor, thereby increasing the water production.

8. The energy-saving air-to-water generator according to claim 4, 5 or 6, characterized in that: The controller is electrically connected to a temperature sensor installed in the water tank. Based on the temperature of the cold water detected by the temperature sensor, the controller controls the motor to adjust the flow rate of refrigerant at the first and fourth ports, thereby shortening the cooling time.

9. The energy-saving air-to-water generator according to claim 8, characterized in that: The compressor is a variable frequency compressor.

10. The energy-saving air-to-water generator according to claim 9, characterized in that: The fan installed next to the evaporator is an adjustable speed fan, and the variable frequency compressor, the adjustable speed fan and the controller are electrically connected.

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